US3200910A - Brake mechanism for intermittent feeding construction - Google Patents

Description

BRAKE MECHANISM FOR INTERMITTENT FEEDING CONSTRUCTION Filed D90. 16, 1965 Aug. 17, 1965 D. F. CUNNINGHAM ETAL 2 Sheets-Sheet 1 /N\/ENT'OR5 i DONALD F. CUNNINGHAM m2 DONALD w. ENGLE, 8Wy M/%M,W1

' flT-roEA/E BRAKE MECHANISM FOR INTERMITTENT FEEDING CONSTRUCTION Aug. 17, 1965 D. F. CUNNINGHAM ETAL 2 Sheets-Sheet 2 Filed Dec. 16, 1963 MW H E s 6 ,Y W E u w a C I T F m. "W A M M 0 O D United States Patent 3,263,919 BRAKE MEEHANISM FUR lNTElRh HTTENT FEEDING GJNdTRUfITlGN Donald F. tlunningham, Milwaulree, Wis, and Donald W.

Eagle, dhermau Gairs, Calif, assignors to US. Partition rsc Packaging Corporation, Milwaukee, Wis, a corpo ration of Wisconsin Filed Dec. 15, 19%, Ser. No. 331,tl13 1 tllaim. (El. 188-85) The present invention relates generally to the brake art, and more particularly to a novel brake mechanism for intermittent feeding constructions as the rotary feeder of a partition assembling machine.

For many years, partition fabricating machines like that shown in the Vail et al. Patent No. 2,163,923, and others, have been used in the making of partition assemblies. These machines include feeding rollers for moving a continuous strip of paperboard into position for severance by a knife. The movement of the feeding rollers is intermittent, requiring timed braking action to prevent overrun or backup of the paperboard. in the mentioned Vail et al. patent, a brake device is disclosed, but neither this brake nor others have been entirely satisfactory in stopping and holding the paperboard as required. it will be understood that overrun of the continuous paperboard will cause jamming in later feeding action, and that back up will result in severance of a partition strip of insufli cient depth or height in the next fed segment of pap-en board.

Therefore, an object of the present invention is to provide a novel brake mechanism for intermittent feeding construction which effectively solves the above long exist ing problem in partition fabricating machine.

In brief, the present novel brake mechanism for intermittent feeding construction includes pivoted lined brake shoes mounted for engagement with and release from a shaft which is intermittently driven in one direction of rotation. Separate positive action means are provided for effecting successively and cyclically clamping of the brake shoes upon the shaft and release therefrom, these actions being so timed in respect to the intermittent movement of the shaft to insure immediate, accurate stopping and release of the shaft.

Hence, another object is to provide a novel brake mechanism for intermittent feeding construction which is positive and accurate in stopping, holding and releasing an intermittently driven shaft during the period it is required to be inoperative.

Another object is to provide brake mechanism for inter mittent feeding construction which is of rugged construe tion, thereby requiring minimum maintenance, which effects savings in maintenance manpower and the substantial elimination of down-time chargeable to the brake mechanism.

Another object is to provide novel brake mechanism for intermittent feeding construction which requires substantially no inspection and in which the brake lining as it be gins to wear can be removed at some time when the partition fabricating machine is down for some other purpose.

The foregoing and other objects and advantage are ap parent from the following description taken with the accompanying drawings, in which:

FIGURE 1 is a schematic view illustrating a continuous or endless paperboard sheet being drawn across the top of a partition fabricating machine by feeding rollers;

*iGURE 2 is a side elevational view of a novel brake mechanism for intermittent feeding construction operatively mounted upon a partition fabricating machine of which only fragments are disclosed;

FIGURE 3 is a fragmentary vertical, transverse view taken on substantially the line 33 of FIGURE 2;

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FIGURE 4 is a fragmentary vertical, transverse cross sectional view taken on substantially the offset line 4-4 of FIGURE 2;

FIGURE 5 is an enlarged transverse, cross-sectional view taken on substantially the line 5-5 of FIGURE 2;

FIGURE 6 is an enlarged vertical, transverse, crosssectional view taken on substantially the line 6-5 of FIGURE 2;

FTGURE 7 is an enlarged fragmentary transverse, vertical cross-sectional View taken diametrically through the bearing and sprocket from which power is transferred to a rotatable cam forming part of the brake mechansim;

FIGURE 8 is an enlarged fragment of FIGURE 2, illustrating in greater detail the brake cam and actuating levers; and

FiGURE 9 is a view similar to FIGURE 8, but with the brake cam in position maintaining the brake shoes in clamping relation on the shaft.

Referring to the drawings more particularly by reference numerals, 2% indicates generally a brake mechanism for intermittent feeding construction which incorporates the principles of the present invention. The brake mechanism 2t? is illustrated as operatively mounted upon a partition fabrication or assembling machine 22 only essential portions of which are shown. The machine 22 includes a side frame 24, a flanged superstructure plate 26, rotatable shafts 23 of feed rolls Fill, a constant speed continuously driven power shaft 32 (FiGS. 2 and 3), a power distributing shaft 34 together with one supporting hearing 36 thereof secured by cap screws to the frame 24, and a large gear mounted on and secured to said shaft 34 for movement therewith. The large gear 3% is disposed adjacent the end of the shaft that is remote from the frame 324, the large gear 328 being in driven mesh with a small gear 4 3 secured to the power shaft 32..

The brake mechanism 2% includes a rectangular mount ing plate which is secured to a pillow block mounting bracket 46 by means of cap screws 43, or the like, as is clearly shown in FIGURE 5, the pillow block mounting bracket as being secured to the plate 26 by cap screws The mounting plate 44 includes a circular opening 52 which is concentric with the feed shaft 23. Concentric within the opening 52 is the hub 54 of a brake drum S6 keyed to the end of the shaft 253.

Two brake shoes 58 are pivotally mounted on a stub shaft 6%) which is secured by a nut 62; and suitable spacers and washers to the upper end of the mounting plate 44 (FIG. 5). Each brake shoe 58 is of the configuration clearly shown in the drawings, each including an arcuate portion @5 5 receiving a segment of brake lining as, a necked-in portion as, and a foot portion 7d receiving a removable brake shoe wear pad 7'2. The brake shoes 58 are disposed with the linings 66 in position for engagement with and release from the brake drum 56, as the drawings clearly disclose.

For closing the brake shoes 53 quickly and firmly against the brake drum 5-5, opposed strong compression springs 74-1 are mounted against the exterior faces of the necked-in portions 68 by means of an elongated bolt '76 and nuts '78. The springs '74 constantly bias the brake shoes 58 towards engagement with the brake drum 56.

For releasing the brake drum 56 and therethrough the feed shaft 28 against the pressure of the springs 74, two brake actuating levers 8% are provided each being of the configuration clearly shown in the drawings, particularly FIGURES 5, 8 and 9. The outer lever tilt) is pivotally mounted upon a stub shaft d2; through a roller bearing 34, the stub shaft 82 being threadedly mounted on the end of a bracket 86 which is secured to the mounting plate 44. The inner lever till is pivotally mounted on a stub shaft 88 through. a suitable bearing like bearing 84, the stub shaft 33 being threadedly engaged directly with the plate ssoo are ed 44 (FIG. 5). As. is clear, the levers ill are generally triangular in outline, each including a roller 96* at one free corner for engagement with the wear plates 72 and a roller at the other free corner, said rollers 92 being disposed for simultaneous engagement by a brake cam 94 mounted upon and adjustably secured to one end or" a driven shaft :6 by a setscrew 95. It is clear from FIGURES 8 and 9 that the levers maintain the brake shoes 58 in the released position when the rollers 22 are engaged by the high portion of the cam 94 (PEG. 9), and that the spring 74 firmly forces the brake shoes 58 into holding engagement with the brake drum 56 when the rollers 92 are in engagement with the low part of the cam 94 (FIG. 8). The ascent of the rollers 92 from the low part to the high part of the cam 94 is sharp, as is the descent from the high part to the low part of the cam 24-, which provides quick brake drum release and engagement, respectively.

The shaft as is of the configuration clearly shown in FEGURE 5 and is supported inwardly of the cam 94 by a ball-bearing unit 93 press-fitted or otherwise secured in the end or a composite housing lltlfi through which the shaft as extends, the h using including a mounting flange which is secured to the upright superstructure plate by cap screws we. The housing 1% also includes reinforcing Webs A second ball-bearing unit is press-fitted or otherwise secured in the mounting end of the housing 1% for support of the shaft 96. A sprocket is keyed to the end of the shaft 9d adjacent bearing A chain 112, passes around the sprocket Mil, under a first idler sprocket 1M, around sprocket 11o keyed to a driven shaft 113, and under a second idler sprocket 114. The sprockets 1.14 are mounted from the side frame 24 on stub shafts 123 by means of suitable bearings 122 (PEG. 6). The shaft 118 is mounted in bearings 12 (FIG. 7

Spaced inwardly from the side frame 24 and affixed to the shaft 34 is a sprocket 12%. is a sprocket 12s. A chain 127 is trained over the two sprockets 125 and 125;.

It is clear that the brake cam 94- is continuously driven from the power shaft 32 through the elements detailed above. It is to be understood that the rotation of the brake cam M is timed so that the brake shoes 58 clamp the drum 56 immediately upon cessation of the positive forward feeding movement of the continuous paperboard 1.518 to prevent further forward movement or back-up movement (FIG. 1). This occurs as the paperboard 128 reaches the position of FIGURE 1, the knife 130 thereupon being actuated to sever the free bottom portion vhich has moved into interfitling relation with aligned longitudinally disposed precut partition strips as is detailed in the Vail et al. Patent No. 2,163,923. The drum 56 is released as positive feeding resumes. Timing and adjustment of the cam 94 in respect to the feed rolls 3G is obtained through the setscrew Aflixed to the shaft 118 I It is apparent that there has been provided novel brake mechanism which fulfills the objects and advantages sought therefor.

It is to be understood that the foregoing descri tion and the accompanying drawin s have been given by way of illustration and example. It is also to be understood that changes in form of the elements, rearrangement of parts, and subtsitution of equivalent elements, which will be obvious to those skilled in the art, are contemplated as within the scope of the present invention which is limited only by the claim which follows.

What is claimed is:

In combination, brake mechanism for stopping, holding and releasing a rotatable member comprising a pair of freely pivoted brake shoe members for engaging a rotatable member, strong springs engaging said brake shoe members biasing them into engagement with a rotatable member, a pair of brake levers freely pivotally mounted for engaging said brakeshoe members, a roller freely pivotally mounted on each brake lever, a cam rotatably mounted for cyclical engagement by said rollers of said brake levers to move said brake evers into engagement with said brake shoe members to release them from a rotatable member, said cam including a first peripheral portion of predetermined constant radius, a second peripheral portion of a predetermined constant radius greater than said first peripheral portion, and sharp transistional peripheral portions between said first and second peripheral portions, said first peripheral portion permitting said brake shoe members to engage rotatable member in braked relation fora predetermined time period, said second peripheral portion holding said brake shoe members in released relation with a rotatable member for a predetermined time period, said sharp transitional peripheral portions effecting quick release and braking movements of said brake shoe members, said cam actions being effected through said brake levers and said springs, whereby said brake mechanism is efiective to substantially instantly cyclically stop and release a rotatable member substantially eliminating overrun and backup thereof.

References Cited by the Examiner UNITED ST TES PATENTS 1,580,584- 4/26 Church et al. 188166 1,912,112 5/33 Wunch 138-166 3,098,649 7/63 Cruzen 163-85 X FOREEGN PATENTS 11,038 1905 Great Britain. 17,740 1912 Great Britain. 20,465 8/29 Netherlands. 200,989 7/23 Great Britain. 261,160 8/08 Germany.

ARTHUR L. LA POINT, Primary Examiner.

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