US2958103A - Schrotz - Google Patents

Schrotz Download PDF

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Publication number
US2958103A
US2958103A US80581059A US2958103A US 2958103 A US2958103 A US 2958103A US 80581059 A US80581059 A US 80581059A US 2958103 A US2958103 A US 2958103A
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US
United States
Prior art keywords
lever
arm
pin
linkage means
toggle linkage
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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English (en)
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SKF GmbH
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SKF Kugellagerfabriken GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by SKF Kugellagerfabriken GmbH filed Critical SKF Kugellagerfabriken GmbH
Application granted granted Critical
Publication of US2958103A publication Critical patent/US2958103A/en
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Expired - Lifetime legal-status Critical Current

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Classifications

    • DTEXTILES; PAPER
    • D01NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01HSPINNING OR TWISTING
    • D01H5/00Drafting machines or arrangements ; Threading of roving into drafting machine
    • D01H5/18Drafting machines or arrangements without fallers or like pinned bars
    • D01H5/56Supports for drafting elements
    • D01H5/565Top roller arms

Definitions

  • the present invention relates to drafting assemblies of spinning machines.
  • Such drafting assemblies include top rolls carrying arms which are conventionally movable between lower operating and upper inoperative positions.
  • the present invention relates to a lock structure which will lock such a top rolls carrying arm both in its lower operating position as well as in its upper inoperative position.
  • 'Oneof the objects of the present invention is to provide a lock structure of the above type which renders it unnecessary to depress the top rolls carrying arm when it is desired to release the latter for movement to its upper inoperative position.
  • locks are known which can be released upon depression of the top rolls carrying arm slightly so that the operator while depressing the arm with one hand can release the lock with the other hand, these types of lock mechanisms are not suitable in constructions where a relatively large load is applied to the top rolls carrying arm since with such a large load it is not possible for the operator to depress the arm further in order to release a conventional lock of this type.
  • Another object of the present invention is to provide a lock structure which is made up of a relatively small number of parts which occupy a relatively small space so that the space required for a series of drafting assemblies according to the invention is not undesirably increased in order to accommodate the lock structure.
  • a further object of the present invention is to provide a lock structure of the above type which does not extend below the top rolls carrying arm so that when the latter is in its upper inoperative position free access may be had to all of the parts of the drafting structure in order to service these parts.
  • An additional object of the present invention is to provide a lock structure of the above type which will not only hold the top rolls carrying arm in its lower operative and its upper inoperative positions, but which will also determine the upper inoperative position of the top rolls carrying arm.
  • the present invention includes in a drafting assembly of a spinning machine a support and a top rolls carrying arm turnably connected to the support for movement between a lower operating and an upper inoperative position.
  • a toggle linkage means is connected to the support and to the arm and moves between one end position slightly beyond a dead center position of the toggle linkage means through the dead center position to an opposite end position where the parts of the toggle linkage means are substantially at the end of their possi- "ice ble movement with respect to each other, this toggle linkage means locking the top rolls carrying arm in its lower operating position when the toggle linkage means is in the said one end position thereof and locking the top rolls carrying arm in its upper inoperative position when the toggle linkage means is in the said opposite end position thereof.
  • Fig. 1 is a diagrammatic side elevational view of a drafting assembly which includes the structure of the invention
  • Fig. 2 is a sectional elevational view on an enlarged scale, as compared to Fig. 1, of that portion of the drafting assembly of Fig. 1 to which the lock structure of the invention is connected;
  • Fig. 3 is an end view of the structure of Fig. 2 as seen in the direction of the arrows III of Fig. 2, part of the structure being broken away in Fig. 3 so as to clearly illustrate the elements of the lock structure of the invention;
  • Fig. 4 shows the position which the parts of Fig. 2 take when the top rolls carrying arm is in an upper inoperative position, this arm being shown in its lower operating position in Fig. 2;
  • Fig. 5 illustrates the position of the parts of Figs. 2 and 4 at a point intermediate the positions thereof illustrated in Figs. 2 and 4.
  • top rolls carrying arm 1 which is of U-shaped cross section and which has a top wall formed with a longitudinally extending slot 1' which terminates short of the ends of the arm 1.
  • This slot 1 enables in a known way a plurality of support units for the saddle arms 2 to be located between the side walls of the arm 1 for adjustable longitudinal movement therealong so that the positions of the saddle arms 2 along the arm 1 can be adjusted in a known way.
  • An unillustrated loading means cooperates in a known way with the top rolls 4 to urge the latter downwardly toward the bottom rolls 5.
  • the top rolls carrying arm 1 is turnable upwardly from the lower operating position thereof illustrated in Fig. 1 to an upper inoperative position.
  • a stationary support in the form of bracket 6 carries a forward pivot pin 7 on which the top rolls carrying arm 1 is turnable.
  • the support 6 includes a pair of parallel plates interconnected by a plurality of spacer pins one of which simultaneously forms the pivot pin 7, and these parallel plates 6 are of a springy material and are formed with aligned openings through which the stationary support bar 9 extends, each of the plates 6 being formed with a slit extending from the opening which receives the bar 9 to the outer edge of the plate 6.
  • plates 6 are also formed with aligned openings which receive a nut to which a bolt 8 is threaded, the head of the bolt engaging a bottom edge of each plate 6 at the rear of the latter so that when the bolt 8 is tightened the slit of each plate 6 will tend to close and thus the plate 6 will tightly grip the stationary bar 9.
  • the arm 1 carries a pivot pin 10 which also has a portion acting as a stop, as will be apparent from the description below.
  • This pivot pin 10 pivotally carries a lever 11 which forms part of a toggle linkage means.
  • the lever 11 is made up of a pair of identical lever portions located in side by side relation and spaced slightly from each other, these portions of the lever 11 being turnable on the pin 10 or being fixed to the latter and the pin 10 in this case is turnably carried by the arm 1 in the side walls thereof, as is particularly apparent from Fig. 3.
  • a second lever 12 of the toggle linkage means extends into the space between the pair of lever portions which form the lever 11, and this lever 12 is pivotally carried by a pivot pin 13 which is directly carried by the support 6.
  • the levers 11 and 12 have overlapping portions, and these overlapping portions of these levers are formed with cutouts which also overlap each other.
  • the pair of lever portions which form the lever 11 are formed with substantially triangular cutouts 11 which are aligned with each other, while the lever 12 is formed with an elongated cutout 12 extending along an arc of a circle whose center is in the axis of the pivot pin 13.
  • An operating pin 14 which is parallel to the pins 10 and 13 extends through the cutouts 11' and 12' and is carried at its ends by the side walls of an operating lever 15 which is pivotally carried by end portions of the pin 13 which project through and beyond the plates 6 as well as the side walls of the cover 6.
  • the operating lever 15 extends over and longitudinally along the arm 1 in the position of the part shown in Fig. 1, and as a result of its length the lever 15 can be easily operated to place the arm 1 in its lower operating or upper inoperative position even when the loading pressures for the top rolls are relatively high.
  • the lever 12 has a hook portion 12" integrally formed therewith and extending therefrom in the manner shown most clearly in Fig. 2, and a Wire spring 16 has a substantially U-shaped portion embracing the lower portion of the lever 12 as viewed in Fig. 2 the legs of this U-shaped portion of the wire spring 16 being coiled about the pin 13 on the opposite sides of the plate or lever 12 and extending to the rear edges of the pair of plates of the support 6 where the outer extremities of the spring 16 are bent so as to overlap and engage these rear edges, so that the spring 16 continuously urges the lever 12 in a clockwise direction,
  • the thickness of the pair of portions of the lever 11 is chosen, in accordance with the particular requirements of the structure of the invention, and in relation to the thickness of the walls of the lever 15, in such a way that the bearing surface provided by the portions of the lever 11 for the operating pin 14 is as great as the area of contact between the pin 14 and the lever 15, so that in this way the forces which the pin 14 is required to withstand are distributed over a sufficient area of the pin 14 and furthermore localized wear of the pin 14 is avoided.
  • the operator turns the operating lever 15 in the direction indicated by the arrow A in Fig. 1.
  • the operating pin turns with the lever 15 around the pin 13 in a clockwise direction, as viewed in Fig. 2, and the pin 14 simply rides along the right edge of the cutouts 11', as viewed in Fig. 2, turning the lever 11 until the pin 14 engages the base of the triangular cutouts of the portions of the lever 11.
  • the arm 1 simply rests as a result of its own Weight in its operating position with the top rolls 4 engaging the bottom rolls 5, so that if desired the arm 1 can again be locked at this time.
  • the hook portion 12" turns upwardly at this time.
  • the pin 10 starts to turn downwardly around the pin 7 and thus the pin 10 and the hook portion 12" approach each other and then engage each other, the intermediate portion of the pin 10 which is located between the pair of plates which form the lever 11 forming a stop portion which cooperates with the hook portion 12 of the lever 12.
  • the downwardly turning pin 10 with its intermediate stop portion engaging the hook portion 12" acts on the lever 12 through the hook portion 12" to prevent the spring 16 from causing the lever 12 to follow the pin 14, and at this time parts will have the position indicated in Fig.
  • the arm 1 due to its own weight will tend to turn around the pin 7 in a counterclockwise direction and thus as soon as the hook portion 12" has turned downwardly through a sufiicient distance the pin 10 will again ride along the tip of the hook portion 12".
  • the counterclockwise turning of the lever will cause the operating pin 14 to move upwardly in the triangular cutouts 11' and the pin 14 will move upwardly from the position of Fig. 4 to that of Fig. 5.
  • the downwardly turning arm 1 will act through the stop portion formed by the intermediate part of the ipn 10 on the tip of the hook portion 12" to turn the lever 12 to the position shown in Fig. 5 while the lever 11 pulls to the left, as viewed in Fig.
  • the path of turning of the arm 1 can be adjusted by choosing a proper size for the cutouts 11 of the portions of the lever 11, and the size of these cutouts may be rendered adjustable by providing elements which are slidably connected to the portions of the lever 11 to be fixed to the latter in an adjusted position over lapping the cutouts 11' so as to regulate the effective size thereof.
  • this lever 11 may have the form of a single plate portion which is bifurcated at its lower end, and of course in this case the end of such a 6 lever would be displaced from the plane of the hook portion 12" so that the latter could cooperate properly with the central stop portion of the pin 10.
  • the lock structure of the invention is composed of relatively small simple elements which occupy only a small amount of space which is part of the space occupied in any event by the arm 1 and support 6, so that the amount of space required for a series of drafting assemblies is not increased by the lock structure of the invention.
  • the arm 1 when the arm 1 is in its upper inoperative position indicated in Fig. 4, none of the lock structure of the invention extends to the left, as viewed in Fig. 4, beyond the arm 1, so that all of this space is freely accessible for convenient servicing of the structure.
  • none of the structure of the invention is so positioned that fibers will collect thereon, so that the structure of the invention also remains perfectly clean.
  • a stationary support an elongated top rolls carrying arm pivotally carried by said support for turning movement between a lower operative and upper inoperative position; and toggle linkage means connected to said support and arm and movable between one end position slightly beyond a dead center position of said toggle linkage means through said dead center position to an opposite end position where the elements of said toggle linkage means are substantially at the end of their possible movement with respect to each other, said toggle linkage means locking said arm in said lower operative position thereof when said toggle linkage means is in said one end position thereof and said toggle linkage means locking said arm in said upper inoperative position thereof when said toggle linkage means is in said opposite end position thereof, said toggle linkage means including a first lever pivotally carried by said arm, a second lever pivotally carried by said support, said first and second levers overlapping each other and being respectively formed with overlapping cutouts at their overlapping portions, and an operating pin extending through said overlapping cutouts; and an operating lever turnably carried by said support and carrying
  • a stationary support an elongated top rolls carrying arm pivotally carried by said support for turning movement between a lower operative and upper inoperative position; toggle linkage means connected to said support and arm and movable between one end position slightly beyond a dead center position of said toggle linkage means through said dead center position to an opposite end position where the elements of said toggle linkage means are substantially at the end of their possible movement with respect to each other, said toggle linkage means -locking said arm in said lower operative position thereof when said toggle linkage means is in said one end position thereof and said toggle linkage means locking said arm in said upper inoperative position thereof when said toggle linkage means is in said opposite end position thereof, said toggle linkage means including a first lever pivotally carried by said arm and a second lever pivotally carried by said support and overlapping said first lever, one of said levers having a hook portion; and a stop portion with which said hook portion cooperates when said toggle linkage means is in said opposite end position thereof, said stop portion and hook portion being
  • a stationary support an elongated top rolls carrying arm pivotally carried by said support for turning movement between a lower operative and upper inoperative position; toggle linkage means connected to said support and arm and movable between one end position slightly beyond a dead center position of said toggle linkage means through said dead center position to an opposite end position where the elements of said toggle linkage means are substantially at the end of their possible movement with respect to each other, said toggle linkage means locking said arm in said lower operative position thereof when said toggle linkage means is in said one end position thereof and said toggle linkage means locking said arm in said upper inoperative position thereof when said toggle linkage means is in said opposite end position thereof, said toggle linkage means including a first lever pivotally carried by said arm and a second lever pivotally carried by said support and overlapping said first lever, one of said levers having a hook portion; and a stop portion with which said hook portion cooperates when said toggle linkage means is in said opposite end position thereof, said stop portion and hook portion being respectively turnable
  • a stationary support an elongated top rolls carrying arm pivotally carried by said support for turning movement between a lower operative and upper inoperative position; toggle linkage means connected to said support and arm and movable between one end position slightly beyond a dead center position of said toggle linkage means through said dead center position to an opposite end position where the elements of said toggle linkage means are substantially at the end of their possible movement with respect to each other, said toggle linkage means locking said arm in said lower operative position thereof when said toggle linkage means is in said one end position thereof and said toggle linkage means locking said arm in said upper inoperative position thereof when said toggle linkage means is in said opposite end position thereof, said toggle linkage means including a first lever pivotally carried by said arm and a second lever pivotally carried by said support and overlapping said first lever, one of said levers having a hook portion; a stop portion with which said hook portion cooperates when said toggle linkage means is in said opposite end position thereof, said stop portion and hook portion being respectively turnable along
  • a stationary support an elongated top rolls carrying arm pivotally carried by said support for turning movement between a lower operative and upper inoperative position
  • toggle linkage means connected to said support and arm and movable between one end position slightly beyond a dead center position of said toggle linkage means through said dead center position to an opposite end position where the elements of said toggle linkage means are substantially at the end of their possible movement with respect to each other, said toggle linkage means locking said arm in said lower 0perative position thereof when said toggle linkage means is in said one end position thereof and said toggle linkage means locking said arm in said upper inoperative position thereof when said toggle linkage means is in said opposite end position thereof; said toggle linkage means including a first lever pivotally carried by said arm and a second lever pivotally carried by said support and overlapping said first lever, said second lever having a hook portion; and a stop portion carried by said arm, said hook portion cooperating with said stop portion carried by said arm for maintaining the latter in its upper inoperative position when said toggle
  • a stationary support an elongated top rolls carrying arm pivotally carried by said support for turning movement between a lower operative and upper inoperative position; and toggle linkage means connected to said support and arm and movable between one end position slightly beyond a dead center position of said toggle linkage means through said dead center position to an opposite end position where the elements of said toggle linkage means are substantially at the end of their possible movement with respect to each other, said toggle linkage means locking said arm in said lower operative position thereof when said toggle linkage means is in said one end position thereof and said toggle linkage means locking said arm in said upper inoperative position thereof when said toggle linkage means is in said opposite end position thereof, said toggle linkage means including a first lever, a pivot pin pivotally connecting said first lever to said arm and a second lever pivotally carried by said support and overlapping said first lever, said second lever having a hook portion; and a stop portion carried by said arm, said hook portion cooperating with said stop portion carried by said arm for maintaining the latter in its
  • a stationary support an elongated top rolls carrying arm pivotally carried by said support for turning movement between a lower operative and upper inoperative position; and toggle linkage means connected to said support and arm and movable between one end position slightly beyond a dead center position of said toggle linkage means through said dead center position to an opposite end position where the elements of said toggle linkage means are substantially at the end of their possible movement with respect to each other, said toggle linkage means locking said arm in said lower operative position thereof when said toggle linkage means is in said one end position thereof and said toggle linkage means locking said arm in said upper inoperative position thereof when said toggle linkage means is in said opposite end position thereof, said toggle linkage means including a first lever pivotally carried by said arm, a second lever pivotally carried by said support and overlapping said first lever, said first and second levers being formed With cutouts at their overlapping portions and said cutouts also overlapping each other and said toggle linkage means including an operating pin extending through said cutouts of said
  • a stationary support a forward pivot pin carried by said support; a rearward pivot pin carried by said support rearwardly of said forward pivot pin; a top rolls carrying arm connected by said forward pivot pin to said support for turning movement with respect to the latter; a third pivot pin carried by said arm for movement therewith around said forward pivot pin; a first lever connected to said rearward pivot pin for tuming movement with respect to said support around the axis of said rearward pivot pin; a second lever connected to said third pivot pin for turning movement with respect to said arm, said first and second levers overlapping each other and being formed with cutouts at their overlapping portions and said cutouts also overlapping each other, the cutout of said first lever extending substantially along an arc of a circle whose center is in the axis of said rearward pivot pin; an operating pin parallel to the other pins and extending through said cutouts of said first and second levers; an operating lever pivotally carried by said rearward pivot pin and fixedly carrying said
  • a stationary support a forward pivot pin carried by said support; a rearward pivot pin carried by said support rearwardly of said forward pivot pin; a top rolls carrying arm connected by said forward pivot pin to said support for turning movement with respect to the latter; a third pivot pin carried by said arm for movement therewith around said forward pivot pin; a first lever connected to said rearward pivot pin for tuming movement with respect to said support around the axis of said rearward pivot pin; a second lever connected to said third pivot pin for turning movement with respect to said arm, said first and second levers overlapping each other and being formed with cutouts at their overlapping portions and said cutouts also overlapping each other, the cutout of said first lever extending substantially along an arc of a circle whose center is in the axis of said rearward pivot pin; an operating pin parallel to the other pins and extending through said cutouts of said first and second levers; an operating lever pivotally carried by said rearward pivot pin and fixedly carrying said

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
US80581059 1958-06-12 1959-04-13 Schrotz Expired - Lifetime US2958103A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DES58589A DE1087944B (de) 1958-06-12 1958-06-12 Verriegelungsvorrichtung fuer einen hochschwenkbar in einer ortsfesten Stuetze aufgenommenen Oberwalzen-Trag- und Belastungsarm fuer Spinnereimaschinen-Streckwerke

Publications (1)

Publication Number Publication Date
US2958103A true US2958103A (en) 1960-11-01

Family

ID=7492651

Family Applications (1)

Application Number Title Priority Date Filing Date
US80581059 Expired - Lifetime US2958103A (en) 1958-06-12 1959-04-13 Schrotz

Country Status (6)

Country Link
US (1) US2958103A (ko)
CH (1) CH366223A (ko)
DE (1) DE1087944B (ko)
FR (1) FR1226211A (ko)
GB (1) GB855531A (ko)
NL (1) NL100806C (ko)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5035027A (en) * 1989-02-11 1991-07-30 Zinser Textilmaschinen Gmbh Means for manipulating a drafting roller carrier of a textile machine
US5303454A (en) * 1992-02-26 1994-04-19 Fritz Stahlecker Textile machine comprising a plurality of drafting units arranged next to one another in a row
US5799374A (en) * 1995-12-27 1998-09-01 Rieter Ingolstadt Spinnereimaschinenbau Ag Spinning machine for the doubling or stretching of fiber bands

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1135350B (de) * 1961-02-08 1962-08-23 Skf Kugellagerfabriken Gmbh Verriegelungsvorrichtung fuer einen hochschwenkbar in einer ortsfesten Stuetze gelagerten Oberwalzen-Trag- und Belastungsarm fuer Spinnereimaschinen-Streckwerke
DE1179841B (de) * 1961-11-22 1964-10-15 Skf Kugellagerfabriken Gmbh Verriegelungsvorrichtung fuer einen um eine ortsfeste Achse einer Stuetze hochschwenkbar aufgenommenen Oberwalzen-Trag- und Belastungsarm fuer Spinnereimaschinen-Streckwerke
AU499696B2 (en) * 1975-10-29 1979-04-26 Ntn Toyo Bearing Co. Ltd. Bracket tightening device

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2865056A (en) * 1956-01-04 1958-12-23 Skf Kugellagerfabriken Gmbh Textile drawing mechanism
US2870488A (en) * 1954-03-17 1959-01-27 Whitin Machine Works Top roll positioning and pressureapplying means for textile drafting machine

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2525647A (en) * 1948-08-18 1950-10-10 Saco Lowell Shops Weighting mechanism for textile drawing machines
BE532613A (ko) * 1954-04-01
US2758340A (en) * 1955-02-14 1956-08-14 Saco Lowell Shops Drafting mechanism
US2813308A (en) * 1955-07-11 1957-11-19 Medley Mfg Company Inc Overarm for fiber attenuating apparatus
DE1019941B (de) * 1955-07-15 1957-11-21 Spinnerei Karl Marx Veb Oberwalzentrag- und Belastungsarm fuer Spinnmaschinenstreckwerke

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2870488A (en) * 1954-03-17 1959-01-27 Whitin Machine Works Top roll positioning and pressureapplying means for textile drafting machine
US2865056A (en) * 1956-01-04 1958-12-23 Skf Kugellagerfabriken Gmbh Textile drawing mechanism

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5035027A (en) * 1989-02-11 1991-07-30 Zinser Textilmaschinen Gmbh Means for manipulating a drafting roller carrier of a textile machine
US5303454A (en) * 1992-02-26 1994-04-19 Fritz Stahlecker Textile machine comprising a plurality of drafting units arranged next to one another in a row
US5799374A (en) * 1995-12-27 1998-09-01 Rieter Ingolstadt Spinnereimaschinenbau Ag Spinning machine for the doubling or stretching of fiber bands

Also Published As

Publication number Publication date
FR1226211A (ko) 1960-07-08
CH366223A (de) 1962-12-15
DE1087944B (de) 1960-08-25
NL100806C (ko) 1962-03-15
GB855531A (ko) 1960-12-07

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