US2136705A - Web guide mechanism - Google Patents

Description

NOV. 15, 1938. W C, NASH l 2,136,705

WEB GUIDE MECHANISM Filed Feb. 27, 1936 3 Sheetsheet 1 WEB'GUIDE MEGHANISM Filed Feb. 27, 193e 3 sheets-sneet 2 Nov. l5, 1938. Wl c. NASH WEB GUIDE MECHANISM Filed Feb. 27, 195,6 3 sheets-sheet 5 Patented Nov. 15, 1938 UNITED STATES PATENT OFFICE 2,136,705 WEB GUIDE MECHANISM Application February 27, 1936, Serial No. 66,079

2 Claims.

Thisv invention relates to improvements in a web guiding device and refers specifically vto a device for guiding an endless traveling web in substantially constant alignment whil-e said web is traveling in a substantially vertical direction.

The object and advantages of my invention will be apparent from the accompanying drawings and following detailed description.

In the drawings, Fig. 1 is a diagrammatic side elevational view of a substantially vertically traveling web 'guided by my improved apparatus.

Fig. 2 is an enlarged elevational View of the guide roll actuating mechanism.

Fig. 3 is a sectional View taken on line 3--3 of Fig. 2.

Fig. 4 is a sectional view taken on line A-l of Fig. 2.

Fig. 5 is a sectional view taken on line 5 5 of Fig. l.

Fig. 6 is a fragmentary detail elevational View illustrating particularly the means for limiting the guide roll actuating mechanism.

`Referring in detail to the drawings, I indicates an endlessly traveling web which is adapted to pass vover guide rolls, 2, 3, il, 5 and 5.

` In the paper making operation after the newly formed web has beenstripped from the forming wire, the same is passed forwardly through one or more sets of presses and during passage through said presses the weak wet web is supported between two endlessly traveling felts or blankets. In Fig. l the web I `comprises one of the traveling felts or blankets. Of course, it is essential that the felt or blanket be caused to travel in substantially constant alignment. Therefore, in view of the fact that the felt during its back travel is carried over' a series of guide rolls positioned above vor below the path of travel of the wet web, said felt must be caused to travel in substantially vertical directions.

My present invention is particularly applicable to the guiding of these traveling felts and a1- `though I do not wish to be limited to this application of my invention, the operation thereof will be described as being carried out in conjunction with the guiding of a felt.

The guide roll 5 is mounted upon shaft 'l and a sprocket wheel 8 may also be mounted upon said shaft. A sprocket chain SI may travel around and be driven by the sprocket wheel 3, said chain in turn driving sprocket wheel I5 which is mounted upon shaft I I journalled in the upper portion of standard I2 (Fig. 3). A standard, I2 may be mounted upon the upper portion of frame I3 and may be secured thereto by means (Cl. i4-241) of bolts I4 or the like. A bevel gear I5 is mounted upon the end of shaft I I and is adapted to mesh with a cooperating bevel gear I5 mounted upon shaft I l. Shaft Il at its end may carry disc I8 and a pin i9 is eccentrically positioned upon the face of said disc. A connecting rod 2i) is pivotally connected to pin I9 and is pivotally connected at its opposite end at 2| to the upper end of U-shaped member 22. A link 23 is also connected at the pivot point 2| and is pivotally anchored at its opposite end as atv 24 to the frame I3. 'Ih-e U-shaped member 22 comprises spaced arms 25 and 26 which embrace or are disposed adjacent opposite faces of ratchet wheel 2l. The ratchetwheel 2'lis rigidlymounted upon shaft 28 which is journalled in vbearings 29 and 35 carried by frame I3. The Wheel 2l carries an integral hub 3.! which abuts bearings `29 and .35 at its opposite ends whereby lateral motion or motion ofthe wheel 21, or motion along the length of shaft 28 is prevented.

It can readily `be seen that -as web or blanket I travels over guide rolls .-2, 3, d, 5 and `E, the rotary motion of guide `roll 5 will drive sprocket wheel Il! which, in turn, imparts motions tothe disc I8 which reciprocates connecting rod 2li. In View of the `fact that the U-shaped member 22 is connected'to the anchoring link 23, the reciprocation of connecting rod 2i! imparts a substantially vertical motion to the U-shaped member 22. `Strictly speaking, the motion of pivot point 2l is along an arc the radius of which is equal to the length yof `the anchoring link 23. However, due to the relative `length of the link 23v mal operation the U-shapedmember 22 oscil- Y lates upwardly and downwardly, the arms 25 being substantially equally spaced from the wheel 21.

A bracket 32 is 4mounted upon frame I3 and is secured thereto` by means of bolts 33 or the like. The end of the bracket 32 carries a bar 3l! which is provided with a slot 35 which traverses a substantial portion of the length of bar 34. A second bar 36 is adjustably secured to bar 30s, the securing means comprising screw 3'! which can be rotated by means of lhand wheel 38, screw 31 being adapted to project through the slot 35 and anchor bar 35 at a desired position along the length of slot 35. Bar 36 is `also provid-ed with a longitudinally extending slot 39. A screw 4U projects through slot 39 and is manipulated by hand wheel 4I to secure the member 42 to the bar 36 at a desired position along the length of the slot 39. The member 42 carries sleeve 43 which serves as a bearing for pin 44. An arm 45 (Fig. 1) is secured at one of its ends toy the pin 44, said arm terminating at its opposite end in two spaced bifurcated projections 46. A feeler or palm 41 carries spaced lugs 48 upon its rear surface, said lugs being secured to the bifurcated arms-46 by means of pin 49. A coil spring 50 embraces pin 49 between the bifurcated arms 46 for a purpose to be hereinafter more fully described.

In utilizing my invention the bars 34 and 36 and the member 42 are so positioned as to bring the face of palm 41 adjacent the desired path of travel of the edge of theweb or felt I.

An arm I is carried at the opposite end of pin 44 and the extending end of said arm is pivotally connected to link 52. The opposite end of link 52 is, in turn, pivotally connected to the extending end of an arm 53, said arm being keyed to shaft 54, which in turn is supportedby the extension 55 formed integral with the end of bar 34. A coil'spring (not shown) circumscribes shaft 54 and normally urges palm 41 toward the edge of the web I. Shaft 54 carries at its opposite end arm 56 which, in turn, is pivotally connected to the member 26 comprising one of the U-shaped elements 22.

,As has been hereinbefore described, when the web or felt I is caused to travel, roll 5 is rotated and as a consequence sprocket chain 9 is driven which, in turn, drives sprocket wheel I8. When sprocket wheel I0 is so driven, the disc I8 is rotated and reciprocating motion is imparted to the U-shaped member 22. During normal operation of my device, that is, when the web or felt I is traveling in desired, constant alignment, the U-shaped member 22 merely reciprocates vertically, both arms 25 and 26 being out of contact with the wheel 21 and being substantially equally spaced from the respective opposite faces of said wheel. Pawls 58 and 59 are ad- ,iustably carried at the ends of respectively, arms 25 and 26. Each face of the wheel 21 is provided with ratchet teeth 6U and 6I, said teeth being formed adjacent the periphery of the wheel and being pitched in opposite directions.

It can readily be seen that during operation of my device lateral shifting or creepage of the web or felt I will cause palm 41 to move which, in turn, rotates pin 44. By means of the arm and linkage mechanism connecting pin 44 and the U-shaped member 22, said member will be rocked to bring either pawl 58 or pawl 59 into contact with teeth 60 or 6I, depending upon the direction of the shift of the web or felt I. Of course, simultaneously with the shifting of the member 22, said member is also reciprocated vertically and, consequently, either pawl 58 or pawl 59 will engage the 'ratchet teeth 68 or 6I as the case may be, and move wheel 21 upwardly to downwardly as viewed in Fig. 2.

' The spring upon shaft 54 tends to keep palm 41 in contact with the edge of the web I if said webtends to move away from said palm. If the web moves toward the palm at a greater rate than the web shifting mechanism Canbperate, spring 50 permits palm 41 to flex and therefore prevents injury to thek web or palm.

Shaft 28 upon which ratchet Wheel 21 is mounted carries at its end sprocket wheel 62 which upon being rotated by movement of wheel 21 drives sprocket chain 63. Sprocket chain 63 is trained around sprocket wheel 64 which, in turn, is mounted upon shaft 65 (Fig. 5). Shaft 65 is journalled in a Wall of housing 66 which may be mounted upon any suitable support (not shown). A substantially vertically positioned screw 61 may also be journalled in the upper and lower portions of the housing 66, the upper end of said screw comprising an open-top bearing 68 in which shaft 69 is journalled, said shaft carrying guide roll 6. A bevel gear is keyed to shaft 65 within housing 66 and meshes with a cooperating bevel gear 1I which is threadedly mounted upon screw 61. The arrangement is such that upon rotation of sprocket wheel 64, bevel gear 1I is rotated and being threadedly engaged with screw 61, said screw is moved upwardly or downwardly. It can readily be seen therefore that one end of roll 6 is therefore moved upwardly or downwardly. Hence, when web or felt I creeps` laterally from a predetermined aligned position, palm 41 actuates mechanism which causes one end of roll 6 to be moved upwardly or downwardly. The shaft 61 at the opposite end of roll 6 is pivoted in a swivel bearing (not shown) whereby roll 6 may be canted from its normal horizontal position by upward or downward movement of screw 61. This action of roll 6 tends to shift the web or felt I back to its proper position of alignment.

A spur gear 12 is also mounted-upon shaft 28 and is rotated when wheel 21 is moved by either pawl 58 or 59 and, consequently, spur gear 12 and sprocket wheel 62 also mounted upon shaft 28 move in unison. Therefore, whenever the end of roll 6 is moved upwardly or downwardly to return web or felt I to desired position, spur gear 12 is rotated. Spur gear 12 meshes with a cooperating larger spur gear 13 mounted upon shaft 14 which, in turn, is journalled in bearing carried by frame I3. A worm pinion 16 is also mounted upon shaft 14 and engages with worm wheel 11 which is mounted upon one end of shaft 18. At the opposite end of shaft 18 a disc 19 is positioned which is provided with a circumferentially arranged series of apertures 80. A screw 8I is positioned in one of the apertures 80, all of which are internally threaded so that they may receive the screw 8|. An arm 62 is pivotally connected to arm 26 of the U-shaped member 22, the opposite end of said arm being provided with a slot 83. The end of arm 82 having slot 83 is provided with a series of spaced apertures 84 through which cotter-pins 85 may be positioned. Arm 82 normally extends substantially horizontally from arm 26 and screw 8| may be positioned through slot 83.

When the web o r felt I shifts thereby causing ratchet Wheel 21 to be rotated and in turn causing gear 12 to be rotated, said gear drives spur gear 13, worm pinion 16, worm wheel 11, shaft 18 and disc 19. Consequently screw 8I is moved within slot 83. To prevent abnormal shifting or raising or lowering of roll 6, cotter pins 85 may be positioned through appropriate apertures 94 so as to limit the movement of screw 8I within slot 83. It can readily be seen that if disc 19 is rotated to too great an extent, pin 8I contacts one of the cotter pins 85 and prevents motion of the U-shaped member in one direction or the other. The gearing arrangement is such that if the mechanism tends to move roll 6 by engagement of pawl 58 with ratchet teeth 6D and this movement becomes excessive, disc 19 will rotate in a clockwise direction, as viewed in Fig. 2, and

`disengagement of pawl 58 from teeth 6U.

screw 8| will contact one of the cotter pins, namely the one to the left of the screw, thereby moving the U-shaped member 22 andcausing If the roll 6 is moved excessively in the opposite direction, that is, when pawl 59 repeatedly engages teeth 6l, disc 19 will rotate in a counterclockwise direction until screw 8| contacts cotter pin 85 and causes disengagement of pawl 59 from teeth 6i by rocking the U-shaped member in a counter-clockwise direction. By the provision of the coil spring U the operation of disc 19 which prevents excessive or extremely prolonged engagementof either pawl 58 or 59 with the respective ratchet teeth 60 or 6l, palm 41 is prevented from injuring the web or felt I since said spring will ex before injury to. the web or to the mechanism results.

In the event that the web or felt I is to be cleaned or for any other reason it is desired to render the device herein described inoperative, that is, to prevent upward or downward movement of the end of roll 6, a hairpin-shaped member 86 may be inserted in apertures 84 in arm 82 adjacent each side 0I screw 8l. It can readily be seen that inasmuch as the disc 19 is positively connected and responsive to movement of the ratchet wheel 2, the U-shaped member 22 cannot be maintained in rocked position for any substantial period of time. In other words, placing ratchet wheel 21 into operation causes the U-shaped member 22 to disengage from ratchet wheel 2i and render the latter inoperative.

I claim as my invention:

1. A device for guiding a moving web which comprises in combination, a guide roll having its surface in contact with said web, a bearing for supporting one end of said guide roll, means for moving said bearing, means for driving said bearing moving means, .a contact member movable in response to lateral movement of said web and an engaging member for connecting said driving means to a source of mechanical power, a connection between said Contact member and said engaging member for connecting said driving means to said source of mechanical power in response to movement of said contact member, means synchronized with said driving means, and means connecting said synchronized means and said engaging member for limitingA movement of said engaging member.

2. A device for guiding a substantially vertical moving web which comprises in combination, a guide roll having its surface in contact with said web, a bearing for supporting one end of said guide roll, means for moving said bearing in a substantially vertical direction, means for driving said bearing moving means, a Contact member movable in response to lateral movement of said web and an engaging member for connecting said driving means to a source of mechanical power, a connection between said contact member and said engaging member for connecting said driving means to said source of mechanical power in response to movement oi said contact member, means synchronized with said driving means, and means connecting said synchronized means and said engaging member WILLIAM C. NASH.

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