US2917786A - Daosch - Google Patents
Daosch Download PDFInfo
- Publication number
- US2917786A US2917786A US72279258A US2917786A US 2917786 A US2917786 A US 2917786A US 72279258 A US72279258 A US 72279258A US 2917786 A US2917786 A US 2917786A
- Authority
- US
- United States
- Prior art keywords
- bracket
- arm
- rolls
- supporting bar
- portions
- Prior art date
- 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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Classifications
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01H—SPINNING OR TWISTING
- D01H5/00—Drafting machines or arrangements ; Threading of roving into drafting machine
- D01H5/18—Drafting machines or arrangements without fallers or like pinned bars
- D01H5/56—Supports for drafting elements
- D01H5/565—Top roller arms
Definitions
- top roll carrier-and-weighting arm which is pivotally articulated to a bracket, is provided with rigid saddleshaped holders for twin top rolls, it is necessary to secure and, t
- brackets on the supporting bar in such a manner that the axes of the twin toprolls are parallel with those of the bottom rolls.
- this object is achieved by arranging that the bracket is divided substantially parallel to the plane of the drafting field in such a manner that the lower portion, which is secured to the supporting bar, is held against lateral swinging movement, and the upper portion, which carries the top roll carricrarm, is so connected to the lower portion as to be able to swing laterally.
- This arrangement renders a construction of the top roll carrier arm possible which is resistant to mechanical stresses and ensures a reliable and accurate alignment of the top rolls with the bottom rolls with their axes parallel, even if the setting of the bracket on the supporting bar deviates widely from the normal position.
- the mounting of the brackets on the supporting bar can be effected quickly, without complicated adjustment, because the top roll carrier arm quickly aligns itself automatically to the correct position.
- bearings for accommodating the swinging movement may be arranged between the upper and lower portions of the bracket, which bearings are situated substantially on the level of the axes of the top rolls when in the operating position.
- the bearings preferably consist of rolling bodies received between thrust plates.
- the thrust plates may either be formed integral with the bracket portions or as additional plates secured to holding surfaces on the bracket portions. It is advantageous to form the holding surfaces by slots in the bracket portions or by lugs bent from the bracket portions.
- the swinging movement of the carrier arm may take place about a point which may conveniently be formed by a bearing ball, the carrier arm resting on a further bearing.
- This bearing may be formed in such a manner that it permits a movement of the carrier arm substantially only in a plane parallel to theplane of the drafting field. It is convenient to arrange that a web, which connects the sides of the upper bracket portion carrying the top roll carrier arm, is constructed in the form of a thrust plate with a bearing point on which latter the ends of the sides of the lower bracket portion, secured to the supporting bar, rest with point or line contact.
- Figure 1 shows a drafting mechanism with a top roll carrier arm partially in elevation and partially in longitudinal section
- Figure 2 is a section on the line 2-2 in Figure 1;
- Figure 3 is a section on the line 3-3 in Figure l.
- Fig. 4 is a side elevational view on a reduced scale of the drafting mechanism.
- a bracket is secured in the usual manner by means of a tightening bolt 2 to a supporting bar 1 which extends along a drafting machine.
- the bracket consists of two portions 3 and 4 which are each bent substantially into the cross-sectional form of a U, the upper portion receiving a pivot pin 5 for the pivotal mounting of a top roll carrier arm 6, which can be locked, in the operating position, by means of a releasable latching device 6', to the upper portion 4 of the bracket.
- the carrier arm a carries weighted top rolls 7 which co-operate with bottom rolls 9, and the relative distance between the top rolls 7 can be altered by displacement of their respective carrier rails 8.
- bracket portions 3 and 4 overlap adjacent to the top rolls 7, and a thrust plate is received in recesses 11 in the portion 4 and extends through slots 12 in the portion 3.
- the ends 3 of the sides of the portion 3 are bent over to engage around a thrust plate 13.
- balls 15. Arranged between the plate 16 and the plate 13 are balls 15. which are guided by a cage 14 and which roll on the plate 10 in the event of the arm 6 swinging laterally.
- the ends 3 of the sides of the portion 3 are brought close together and, if necessary, secured together.
- the portion 4 is covered by a fitting 20 of sheet metal or the like, in the form of a hood which extends over part of the portion 3 and forms part of the carrier arm. At its rear end, the fitting 20 carries a spring 21 which engages the plate 18 and web 4' when the arm 6 is raised and thus locates the arm 6 in its upper, inoperative, position, as shown in broken lines in Fig. 1.
- the mounting of the drafting mechanism is effected in such a manner that the portion 3 is secured by means of the bolt 2 to the supporting bar 1, precise right-angled adjustment in relation to the supporting bar being unnecessary.
- the portions 3 and 4 form a unit, the portion 4 receiving the carrier arm 6 to pivot on the bolt 5.
- the mode of operation in service is as follows: After the carrier arm 6 has been swung down towards the bottom rolls 9 and locked to the portion 4, and if necessary also to another part of the machine, automatic lateral swinging to settle into position takes place about the bearing point formed by the ball 17. In the course of this, the balls 15 roll on the plate 10 and transmit the pressure of the usual springs 7' which weight the top rolls 7, see Fig. 1, through the plate 13 to the portion 3 on the supporting bar 1.
- the embodiment illustrated is only an example of the invention which is not restricted thereto. Instead, many modifications and alterations are possible. This applies both to the mounting of the thrust plates on the portions 3 and 4 of the bracket and to the form and arrangement of the bearings.
- the thrust plates may be integral wtih the bracket portions.
- textile drafting mechanism of the type comprising top and bottom rolls, a supporting arm for the top rolls adapted to be raised and lowered from and into operative position and self-adjustable laterally when in said position, means for releasably locking the arm in the operating position, and a bracket on which the said arm is mounted, said mechanism being characterized by the fact that the said bracket is divided into upper and lower portions with means for uniting said portions affording freedom for relative self-adjustment thereof in a plane substantially parallel to the drafting field defined by the upper and lower rolls about a pivot normal to said plane, the lower portion of the bracket being relatively fixed, and means for mounting the said roll-supporting arm on the upper relatively movable portion of the bracket.
- a drafting mechanism as claimed in claim 1 including bearings between the upper and lower portions of the bracket to accommodate said relative movement, said bearings being arranged substantially on the level of the axes of the top rolls when the latter are in the operating position.
- a drafting mechanism as claimed in claim 4 wherein the thrust plates for said pivot hearing are carried respectively by the bracket portions, and wherein the said lower portion of the bracket has an extension which overlies and vertically confines the thrust plate of the upper bracket portion.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Textile Engineering (AREA)
- Spinning Or Twisting Of Yarns (AREA)
Description
Dec. 22, 1959 E DAUSCH SUPPORT FOR THE UPPER RbLLER-CARRYING AND LOAD-APPLYING ARM OF THE DRAFTING MECHANISM OF SPINNING MACHINES Filed March 20, 1958 United States Patent SUPPORT FOR THE UPPER ROLLER-CARRYING AND LOAD-APPLYING ARM OF THE DRAFT- ING MECHANISM OF SPINNING MACHINES Ernst Daiisch, Stuttgart, Germany, assignor to SKF Kugellagerfabriken Gesellschaft mit beschrankter Haftung, Schweinfurt, Germany, a corporation of Germany Application March 20, 1958, Serial No. 722,792
Claims priority, application Germany March 23, 1957 5 Claims. (Cl. 19-135) This invention is for improvements in or relating to textile drafting mechanism, and is concerned with mech with the bottom roils, or should have the opportunity of bein able to align themselves automatically in this position. In drafting mechanisms in which individual guide arms, which are received for lateral swinging movement inside a top-roll carrier-and-weighting arm, are provided to receive the top rolls, the automatic alignment of the top rolls parallel to the bottom rolls is assured in every operating position of the carrier-and-weighting arm.
On the other hand, in drafting mechanism wherein the top roll carrier-and-weighting arm, which is pivotally articulated to a bracket, is provided with rigid saddleshaped holders for twin top rolls, it is necessary to secure and, t
align the brackets on the supporting bar in such a manner that the axes of the twin toprolls are parallel with those of the bottom rolls. This presupposes not only a stable construction of the brackets but also an accurate align ment thereof on the supporting bar. It has been found that the brackets can alter their position during operation, as a result of which the position of the carrier-and-weighting arm is also altered, so that the top rolls are no longer parallel to the bottom rolls and therefore operate faultily. Since minor deviations of the top roll carrier arm cannot be immediately detected, but nevertheless unfavorably affect the yarn being processed, this construction is not satisfactory. Moreover, exact realignment of the brackets on the supporting bar in the event of displacement, involves a heavy expenditure of time and labor.
It has already been proposed to arrange that the portion of the carrier arm receiving the top rolls should be mounted for lateral swinging in order thus to be able to compensate for any variations in the position of the brackets. For this purpose, hearings were provided in the form of bolts engaging through bores in the swinging portion of the carrier arm. This construction was un satisfactory, however, because heavy frictional forces develop at the bearing positions which interfere with the correct lateral swinging of the part carrying the top rolls, and in addition lead to premature Wear of the bearing members. With heavy top roll weighting pressures, therefore, such a construction necessitates frequent changing of the bearing members, so this construction is expensive in operation.
It is an object of the present invention to overcome the above mentioned disadvantages and to provide a drafting mechanism of great reliability and long life, which is simple to manufacture, and which renders posisible automatic alignment of the top and bottom rolls ice regardless of the position of the bracket on the supporting bar.
According to the invention, this object is achieved by arranging that the bracket is divided substantially parallel to the plane of the drafting field in such a manner that the lower portion, which is secured to the supporting bar, is held against lateral swinging movement, and the upper portion, which carries the top roll carricrarm, is so connected to the lower portion as to be able to swing laterally. This arrangement renders a construction of the top roll carrier arm possible which is resistant to mechanical stresses and ensures a reliable and accurate alignment of the top rolls with the bottom rolls with their axes parallel, even if the setting of the bracket on the supporting bar deviates widely from the normal position. As it is possible to determine the position of the individual top rolls inside the carrier arm in such a manner that their axes are parallel to one another even in the event of displacement, the mounting of the brackets on the supporting bar can be effected quickly, without complicated adjustment, because the top roll carrier arm quickly aligns itself automatically to the correct position.
According to the invention, bearings for accommodating the swinging movement may be arranged between the upper and lower portions of the bracket, which bearings are situated substantially on the level of the axes of the top rolls when in the operating position. In order to reduce the bearing friction to a minimum and to eliminate forces which interfere with automatic alignment of the top rolls with the bottom rolls with their axes parallel, the bearings preferably consist of rolling bodies received between thrust plates. The thrust plates may either be formed integral with the bracket portions or as additional plates secured to holding surfaces on the bracket portions. It is advantageous to form the holding surfaces by slots in the bracket portions or by lugs bent from the bracket portions.
The swinging movement of the carrier arm may take place about a point which may conveniently be formed by a bearing ball, the carrier arm resting on a further bearing. This bearing may be formed in such a manner that it permits a movement of the carrier arm substantially only in a plane parallel to theplane of the drafting field. It is convenient to arrange that a web, which connects the sides of the upper bracket portion carrying the top roll carrier arm, is constructed in the form of a thrust plate with a bearing point on which latter the ends of the sides of the lower bracket portion, secured to the supporting bar, rest with point or line contact.
One embodiment of the invention is illustrated by way of example in the drawing, in which:
Figure 1 shows a drafting mechanism with a top roll carrier arm partially in elevation and partially in longitudinal section;
Figure 2 is a section on the line 2-2 in Figure 1;
Figure 3 is a section on the line 3-3 in Figure l, and
Fig. 4 is a side elevational view on a reduced scale of the drafting mechanism.
A bracket is secured in the usual manner by means of a tightening bolt 2 to a supporting bar 1 which extends along a drafting machine. The bracket consists of two portions 3 and 4 which are each bent substantially into the cross-sectional form of a U, the upper portion receiving a pivot pin 5 for the pivotal mounting of a top roll carrier arm 6, which can be locked, in the operating position, by means of a releasable latching device 6', to the upper portion 4 of the bracket. The carrier arm a carries weighted top rolls 7 which co-operate with bottom rolls 9, and the relative distance between the top rolls 7 can be altered by displacement of their respective carrier rails 8.
As shown particularly in Figure 2, the bracket portions 3 and 4 overlap adjacent to the top rolls 7, and a thrust plate is received in recesses 11 in the portion 4 and extends through slots 12 in the portion 3. The ends 3 of the sides of the portion 3 are bent over to engage around a thrust plate 13. Arranged between the plate 16 and the plate 13 are balls 15. which are guided by a cage 14 and which roll on the plate 10 in the event of the arm 6 swinging laterally. At the rear side adjacent to the pivot pin 5, the ends 3 of the sides of the portion 3 are brought close together and, if necessary, secured together. They rest on a boss 16, which is pressed out of the web 4 of the portion 4, with substantially point or line contact, the boss 16 forming a cup to receive a ball 17 which rests in a recess in a thrust plate 1%. The plate 18 is secured to bentover lugs 19 on the portion 3. The portion 4 is covered by a fitting 20 of sheet metal or the like, in the form of a hood which extends over part of the portion 3 and forms part of the carrier arm. At its rear end, the fitting 20 carries a spring 21 which engages the plate 18 and web 4' when the arm 6 is raised and thus locates the arm 6 in its upper, inoperative, position, as shown in broken lines in Fig. 1.
The mounting of the drafting mechanism is effected in such a manner that the portion 3 is secured by means of the bolt 2 to the supporting bar 1, precise right-angled adjustment in relation to the supporting bar being unnecessary. The portions 3 and 4 form a unit, the portion 4 receiving the carrier arm 6 to pivot on the bolt 5. The mode of operation in service is as follows: After the carrier arm 6 has been swung down towards the bottom rolls 9 and locked to the portion 4, and if necessary also to another part of the machine, automatic lateral swinging to settle into position takes place about the bearing point formed by the ball 17. In the course of this, the balls 15 roll on the plate 10 and transmit the pressure of the usual springs 7' which weight the top rolls 7, see Fig. 1, through the plate 13 to the portion 3 on the supporting bar 1. It can be seen that even with extreme deviations from the correct setting of the porion 3 on the supporting bar 1, the arm 6 will swing accurately and rapidly into proper setting, because this movement is assisted to a great extent by the leverage provided by the distance of the bearing point of the ball 17 from the axis of the front pair of top rolls.
As already mentioned, the embodiment illustrated is only an example of the invention which is not restricted thereto. Instead, many modifications and alterations are possible. This applies both to the mounting of the thrust plates on the portions 3 and 4 of the bracket and to the form and arrangement of the bearings. The thrust plates may be integral wtih the bracket portions.
1 claim:
1. In textile drafting mechanism of the type comprising top and bottom rolls, a supporting arm for the top rolls adapted to be raised and lowered from and into operative position and self-adjustable laterally when in said position, means for releasably locking the arm in the operating position, and a bracket on which the said arm is mounted, said mechanism being characterized by the fact that the said bracket is divided into upper and lower portions with means for uniting said portions affording freedom for relative self-adjustment thereof in a plane substantially parallel to the drafting field defined by the upper and lower rolls about a pivot normal to said plane, the lower portion of the bracket being relatively fixed, and means for mounting the said roll-supporting arm on the upper relatively movable portion of the bracket.
2. A drafting mechanism as claimed in claim 1 including bearings between the upper and lower portions of the bracket to accommodate said relative movement, said bearings being arranged substantially on the level of the axes of the top rolls when the latter are in the operating position.
3. A drafting mechanism as claimed in claim 2, characterized in that the bearings consist of rolling bodies arranged between thrust plates.
4. A drafting mechanism as claimed in claim 3 wherein one of said bearings constitutes a pivotal connection for the bracket portions about which the said relative movement takes place.
5. A drafting mechanism as claimed in claim 4 wherein the thrust plates for said pivot hearing are carried respectively by the bracket portions, and wherein the said lower portion of the bracket has an extension which overlies and vertically confines the thrust plate of the upper bracket portion.
References Cited inthe file of this patent UNITED STATES PATENTS Raible et al Apr. 20, 1954
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DES52838A DE1029273B (en) | 1957-03-23 | 1957-03-23 | Support for upper roll support and load arms for drafting devices on spinning machines |
Publications (1)
Publication Number | Publication Date |
---|---|
US2917786A true US2917786A (en) | 1959-12-22 |
Family
ID=7488953
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US72279258 Expired - Lifetime US2917786A (en) | 1957-03-23 | 1958-03-20 | Daosch |
Country Status (8)
Country | Link |
---|---|
US (1) | US2917786A (en) |
BE (1) | BE565676A (en) |
CH (1) | CH361512A (en) |
CY (1) | CY311A (en) |
DE (1) | DE1029273B (en) |
FR (1) | FR1193522A (en) |
GB (1) | GB827498A (en) |
NL (1) | NL102764C (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3200446A (en) * | 1962-01-19 | 1965-08-17 | Skf Kugellagerfabriken Gmbh | Lockable top roller arrangement for a textile drawing mechanism |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5914578B2 (en) * | 1975-12-26 | 1984-04-05 | エヌ テ− エヌトウヨウベアリング カブシキガイシヤ | pendulum |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2246474A (en) * | 1939-01-04 | 1941-06-17 | Ver Kugellagerfabriken Ag | Guiding arrangement for top weighting rolls |
US2657434A (en) * | 1951-10-20 | 1953-11-03 | Saco Lowell Shops | Drawing mechanism for spinning and roving frames |
US2675587A (en) * | 1949-09-23 | 1954-04-20 | Ver Kugellagerfabriken Ag | Device for supporting and weighting the top rolls of drawing mechanisms |
-
1957
- 1957-03-23 DE DES52838A patent/DE1029273B/en active Pending
-
1958
- 1958-03-13 BE BE565676D patent/BE565676A/xx unknown
- 1958-03-14 CH CH361512D patent/CH361512A/en unknown
- 1958-03-19 NL NL226030A patent/NL102764C/xx active
- 1958-03-20 US US72279258 patent/US2917786A/en not_active Expired - Lifetime
- 1958-03-21 FR FR1193522D patent/FR1193522A/fr not_active Expired
- 1958-03-21 GB GB918958A patent/GB827498A/en not_active Expired
-
1965
- 1965-03-16 CY CY31165A patent/CY311A/en unknown
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2246474A (en) * | 1939-01-04 | 1941-06-17 | Ver Kugellagerfabriken Ag | Guiding arrangement for top weighting rolls |
US2675587A (en) * | 1949-09-23 | 1954-04-20 | Ver Kugellagerfabriken Ag | Device for supporting and weighting the top rolls of drawing mechanisms |
US2657434A (en) * | 1951-10-20 | 1953-11-03 | Saco Lowell Shops | Drawing mechanism for spinning and roving frames |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3200446A (en) * | 1962-01-19 | 1965-08-17 | Skf Kugellagerfabriken Gmbh | Lockable top roller arrangement for a textile drawing mechanism |
Also Published As
Publication number | Publication date |
---|---|
FR1193522A (en) | 1959-11-03 |
CH361512A (en) | 1962-04-15 |
CY311A (en) | 1965-03-16 |
BE565676A (en) | 1960-07-15 |
DE1029273B (en) | 1958-04-30 |
NL102764C (en) | 1962-10-15 |
GB827498A (en) | 1960-02-03 |
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