US3512691A

US3512691A - Automatic devices for centering the moving processing cloth

Info

Publication number: US3512691A
Application number: US688823A
Authority: US
Inventors: Mark Solomonovich Neifeld; Pavel Samuilovich Moroz; Leizer Zelikovich Nemenman; Vladimir Sergeevich Ushakov
Original assignee: SP K BJURO OBORU DLYA PROIZV A
Current assignee: SP K BJURO OBORU DLYA PROIZV A; SPETSIALNOE KONSTRUKTORSKOE BJURO PO OBORUDOVANIJU DLYA PROIZVODSTVA ASBESTOTSEMENTNYKH IZDELY I RULONNOKROVELNYKH MATERIALOV
Priority date: 1967-12-07
Filing date: 1967-12-07
Publication date: 1970-05-19
Anticipated expiration: 1987-05-19

Description

May 19, 1970 M. s. NEIFELD ETAL 3,512,591

AUTOMATIC DEVICES FOR CENTERING THE MOVING PROCESSING CLOTH Filed Dec. 7, 1967 3 Sheets-Sheet l l Q mm (m B mo c & a Q f 3 n M R w ww. 6 Q w a 1 O 0 i Q Q E M O m M III! 1.||I|I|:I M w m w ww w m May 19, 1970 M. s. NEIFELD ETAL AUTOIATIC DEVICES FOR-CENTERING THE MOVING PROCESSING CLOTH 3 Sheets-Shet 3 Filed Dec. 7. 1967 y 1970 M. s. NEIFELD ETAL 3,512,591

AUTOMATIC DEVICES FOR CENTERING THE MOVING PROCESSING CLOTH Filed Dec. 7. 1967 3 Sheets-Sheet s ILL! United States Patent 3,512,691 AUTOMATIC DEVICES FOR CENTERING THE MOVING PROCESSING CLOTH Mark Solomonovich Neifeld, Pavel Samuilovich Moroz, Leizer Zelikovich Nemenman, and Vladimir Sergeeviclh Ushakov, Moscow, U.S.S.R., assignors to Spetsialnoe Konstruktorskoe Bjuro Po Oborudovaniju dlya proizvodstva asbestotsementnylrh Izdely I Rulonnokrovelnykh Materialov, Moscow, U.S.S.R.

Filed Dec. 7, 1967, Ser. No. 688,823 Int. Cl. B65h 25/06 US. Cl. 226-23 4 Claims ABSTRACT OF THE DISCLOSURE A moving processing cloth is centered by adjusting the angular position of an adjusting roll through the action of a movable barrel of a power cylinder. The barrel is moved by the operation of a slide valve distributor, the piston of which is actuated by a rocking shaft one end of which is connected to a spring-loaded follower bar engaging a cam on the barrel and the other end of which is connected to a displaceable rod which in turn is connected through a rope, lever, or hydraulic mechanism to a pair of spring loaded pivotal levers carrying rollers engaging the edges of the moving cloth.

The invention relates to automatic devices for centering moving processing cloth, in particular in sheet-forming machines intended for fibre-cement, paperand cardboard-making industries.

The conventional automatic devices for centering the moving processing cloth in said machines are provided with an adjusting roll driven by a hydraulic cylinder receiving the command signals from feelers rigidly secured on a common movable axle or independent of one an other.

A disadvantage common to all conventional devices is that they fail to center the cloth when its width is varied in operation.

This especially refers to smooth woolen cloth.

An object of the invention is to eliminate the above disadvantage.

The object is achieved by providing a device with two operatively interconnected spring-loaded levers carrying feelers at their ends, a rod of an operative interconnection mechanism of the levers being joined to one end of a rocking shaft contacting the piston of a slide valve distributor for the power cylinder of the adjusting roll, whereas the other end of the rocking shaft is joined to the s ringloaded bar interacting with the cam secured on the movable barrel of the power cylinder which is articulated to the adjusting roll.

One mode of the operative interconnection of between the levers is a rope arrangement, wherein the ropes attached to the levers are reeved around a drum mounted on the rod of the operative interconnection mechanism for the levers.

Such operative connection between the levers can be also carried out by means of bars articulated the levers and to the arms of a double-arm lever connected to the rod of said operative interconnection mechanism for the levers.

In the case of operating with very wide cloth pieces, said operative interconnection mechanism comprises auxiliary power cylinders articulated to the levers, whose inner chambers intercommunicate via pipe-lines which, in turn, communicate with the spaces of one further power cylinder whose rod serves as the rod of said operative interconnection of the levers.

Such an embodiment of the drive ensures a reliable 3,512,691 Patented May 19, 1970 centering of the processing cloth with respect to the longi tudinal axis of the machine even when a variation in the width of cloth occurs during operation.

The first two modes of the operative interconnection mechanism between the levers are used for rather narrow cloth pieces, i.e., with a width of up to 2500 mm., the third mode being suitable for wider cloth pieces.

Given hereafter is a detailed description of specific and preferred embodiments of the invention with reference to the appended drawings, wherein:

FIG. 1 is a diagrammatic illustration of a device made according to the invention, wherein the operative interconnection between the levers is made as a rope arrangement;

FIG. 2 shows the same device wherein the operative interconnection between the levers is constructed as a leverage;

FIG. 3 shows the same device, wherein the operative interconnection between the levers is constructed as a hydraulic system.

The device for centering the processing cloth comprises an adjusting roll 1 (FIGS. 1, 2 and 3) mounted on a platform 2 the middle portion of which is secured on the bed (not shown in the drawing) by means of a hinge joint 3. The roll 1 is turned by a power cylinder Wl'llCh is a hydraulic cylinder in this particular case, said hydraulic cylinder 4 being also mounted on the bed and having a moving barrel 5 connected to the platform 2 by means of a carrier 6. Roll feelers 7 and 8 are mounted at the ends of levers 9 and 10 respectively, the other end of said levers being articulated to the bed.

The operative interconnection between the levers 9 and 10 is made by ropes 11 and 12 (FIG. 1) reeved around the pulleys 13 and 14 and drum 15.

The latter is articulated to a rod 16 which, in turn, is hinged-joined to the end of a rocking shaft 17.

The latter with its other end is joined to a springloaded bar 18. The rocking shaft 17 rests upon the piston of a slide valve distributor 19. The spring-loaded bar 18 interacts with a cam 20 secured on the moving body 5 of the drive hydraulic cylinder 4.

Each rope 11 and 12 is reeved around drum 15 in a single-turn loop. The midpoint of each loop is locked on the drum by screws 21 and 22. The ropes 11 and 12 are interconnected by a spring 23 which presses the roll feelers 7 and 8 against a cloth 24.

The levers 9 and 10 can be interconnected by means of intermediate bars 25 and 26 (FIG. 2) articulated to the arms of a double-arm lever 27 which is articulated to the rod 16 of the operative interconnection between the levers 9 and 10.

A spring 28 which presses the roller feelers 7 and 8 against the cloth 24 connects the end of the double-arm lever 27 with a strip 29 rigidly attached to the rod 16.

For operation with cloth pieces wider than 2.5 m., a hydraulic system is used for the operative interconnection between the levers 9 and 10. In this case additional hydraulic cylinders 30 and 31 (FIG. 3) are articulated to said levers, the chambers of said cylinders being interconnected via

pipe lines

32 and 33 which in turn are connected with the chambers of one further hydraulic cylinder 34. A rod 35 of said hydraulic cylinder serves as the rod of the operative interconnection betweeii the levers 9 and 10. Springs 36 and 37 which individually press-each roller feeler 7 and 8 against the cloth 24 connect the ends of the levers 9 and 10 respectively with the bed.

While in operation, the

s rings

23, 28, 36 and 37 (FIGS. 1, 2 and 3) continuously press the roller feelers 7 and 8 against the edges of the cloth 24. If the cloth width is varied in operation but the cloth itself is not displaced relative to the longitudinal agris of the machine, the position of the adjusting roll 1 remains constant since the levers 9 and 10 move in opposite directions at the same angle. If the operative interconnect-ion between the levers is accomplished according to the first aforementioned mode, the drum (FIG. 1) will turn about its axis without actuating the rod. The drum will turn under the effect of tension of the spring 23 via the ropes 11 and 12 when the roller feelers 7 and 8 move to meet each other and by the levers 9 and 10 when said roller feelers move apart from each other.

If the operative interconnection between the levers is accomplished according to the second of the above said modes, similar displacement of the levers 9 and 10 (FIG. 2) causes a displacement of the intermediate bars 25 and 26 while the double-arm lever 27 turns about a pivot 38 without actuating the rod 16. In this case the spring 28 performs the same functions as the spring 23 in the first mode of the operative interconnection of the levers.

If the operative interconnection between the levers is accomplished according to the third of the modes mentioned above, said displacement of the levers causes the oil in the hydraulic system to flow between the chambers of the both hydraulic cylinders 30 and 31 (FIG. 3) along the

pipe lines

32 and 33 thus by-passing the hydraulic cylinder 34 without actuating the rod of the operative interconnection system 35.

When the cloth 24 is displaced relative to the longitudinal axis of the machine to either side, the roller feelers 7 and 8 travel in the same direction as the cloth. In this case, if the operative interconnection system is accomplished according to the first mode, the rod 16 will be displaced in the direction of the lever displacement, but the drum 15 will not turn about its axis.

While travelling, the rod 16 actuates, through the rocking shaft 17, the slide valve distributor 19 which lets the oil flow through one of the holes in the stationary piston of the hydraulic cylinder 4 to enter its moving barrel 5.

When the barrel 5 of the hydraulic cylinder 4 moves together with the cam 20, the carrier 6 turns the platform 2 and, together therewith, the adjusting roll 1, in either direction, whereby the cloth 24- is made to return to the central position.

In this case the spring-loaded bar 18 While interacting with the cam 20, shuts off the slide valve of the distributor 19, whereby the oil feed to the hydraulic cylinder 4 ceases. Thus, the degree to which the adjusting roll 1 is inclined in an exact agreement with a certain amount of cloth displacement to either side.

If the operative interconnection is accomplished according to the second mode, both intermediate bars 25 and 26 and the double-arm lever 27 with the rod 16 move in the same direction but the double-arm lever does not turn about its axis 38. While moving the rod 16 actuates the rocking shaft 17 and therethrough the entire hydraulic system and the adjusting roll 1 in the above-described way.

If the operative interconnection is accomplished according to the third mode, the oil flows from the space of the hydraulic cylinders 30 and 31 to the corresponding space of the hydraulic cylinder 34 thus causing its red 35 to move and actuate, through the rocking shaft 17, the slide valve distributor 19, hydraulic cylinder 4 and adjusting roll 1 in the above-described way.

What we claim is:

1. An automatic device for centering moving processing cloth in a forming machine, said device comprising an adjusting roll adjustably mounted on a bed; a power cylinder also mounted on the bed and including a movable barrel which is coupled to said adjusting roll to adjust the position thereof; two displaceable spring-loaded levers; roller feelers located on said levers for engaging lateral edges ofthe moving cloth; means interconnecting said levers and including a rod which is displaced in accordance with movement of said levers caused by shifting of the edges of the cloth; a rocking shaft connected with said rod for following the displacement thereof; a slide valve distributor having a piston in contact with said rocking shaft for being operated thereby to activate the power cylinder; at spring-loaded bar operatively coupled with said rocking shaft; and 'a cam mounted on the movable barrel of the power cylinder and engaging said springloaded bar to operate the rocking shaft and thereby the distributor inaccordance with change in position of the movable barrel.

2. A device as claimed in claim 1 wherein said means interconnecting said levers comprises a drum and pulleys, and ropes 'reeved around the pulleys and drum, said drum being secured to said rod.

3. A device as claimed in claim 1 wherein said means interconnecting said levers comprises bars articulated to said spring-loaded levers and a double arm lever connected to said bars and to said rod to operatively couple the latter.

4. A device as claimed in claim 1 wherein said means interconnecting said levers comprises a power cylinder articulated to each spring-loaded lever, and a further power cylinder having a rod constituted as said rod interconnecting said levers to actuate the same, said power cylinders which are coupled to the spring-loaded levers having intercommunicating chambers which, in turn, communicate with the chambers of said further power cylinder.

References Cited UNITED STATES PATENTS 3,119,535 1/1964 Hoffman 22623 3,368,665 2/1968 Jinkins 226-23 X ALLEN N. KNOWLES, Primary Examiner