EP1801270A1 - Bottom belt or apron control device for drawing frames - Google Patents
Bottom belt or apron control device for drawing frames Download PDFInfo
- Publication number
- EP1801270A1 EP1801270A1 EP05380271A EP05380271A EP1801270A1 EP 1801270 A1 EP1801270 A1 EP 1801270A1 EP 05380271 A EP05380271 A EP 05380271A EP 05380271 A EP05380271 A EP 05380271A EP 1801270 A1 EP1801270 A1 EP 1801270A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- roller
- drive roller
- fixed
- support
- aprons
- 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.)
- Withdrawn
Links
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims abstract description 23
- 230000005540 biological transmission Effects 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000009960 carding Methods 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
Images
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
- D01H5/70—Constructional features of drafting elements
- D01H5/86—Aprons; Apron supports; Apron tensioning arrangements
-
- 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
Definitions
- the present invention is related to a bottom belt or apron control device in roving frame drawing trains.
- Roving frames are provided with a drawing train for the corresponding roving for each production spindle.
- Each drawing train has several freely rotating pressure rollers associated to a drawing arm located on a fixed pedestal with the ability of being moved between an inoperative position and an operative position in which the pressure rollers act tangentially against roving drawing rollers.
- drawing trains have a top apron or belt associated to the drawing arm and a bottom apron or belt assembled on one of the bottom rollers for each production spindle.
- These aprons or belts serve to accompany the slivers entering the drawing train during the production process until obtaining the roving.
- top and bottom aprons are generally arranged in the second or third drawing line, and the drawing system can have three or four lines.
- the top and bottom aprons In the working position, the top and bottom aprons can be vertically aligned or one can be slightly ahead of the other, depending on the characteristics of the drawing to be performed.
- both aprons occurs as a result of the pressure exerted by the cylinders or rollers supporting them, such that the top and bottom aprons are pressed together at the point of contact between both rollers.
- the bottom roller made of steel, to be motor-driven so as to cause the forward movement of the bottom apron, and that the roller associated to the top apron rotates freely, such that both aprons move forward due to the action of the motor-driven roller on the bottom apron, transmitting movement to the top apron.
- the bottom apron has a reduced length and is assembled on the drawing roller and on a support profile with a shape similar to the top apron; in other cases the bottom apron has a greater length and is assembled on the drawing roller, on the support profile and on a bottom tensioner which is normally spring-operated.
- the purpose of this tensioner is to keep the apron in its correct position and to assure, in the event that the apron should become jammed, that it cannot become creased, which would cause it to break.
- tensioners currently used are individual spring-operated tensioners and are assembled on a support rail.
- the same rail is used as a support point and the apron slides due to friction over the end part of the tensioner, this being the main cause of the jams in the apron.
- This support rail for the tensioners is fixed on the fixed pedestal and is therefore independent of the supports or brackets holding the drawing cylinders.
- This feature entails a drawback upon changing the position of the brackets or supports of the drawing cylinders on the pedestal so as to adjust the carding or drawing since the tensioner does not move, but rather it changes the tension of the apron, causing an unwanted effect.
- the bottom belt or apron control device in the roving frame drawing trains object of the invention of the type comprising a drive roller for drafting one or more bottom aprons and a support profile for said bottom aprons, the drive roller and the support profile being assembled on a support or bracket that is positioned and fixed on a fixed pedestal, has several special constructive features aimed at eliminating the bottom tensioners, the assembly and adjustment drawbacks these imply and the variation of the tension of the bottom aprons when the position of the brackets or supports varies with respect to the respective fixed pedestals.
- control device object of the invention comprises a bottom roller allowing the support thereon of one or several bottom aprons, considerably simplifying the construction of the roving frame, and which is fixed either directly or indirectly to the supports or brackets of the drive roller and support profile, kept a fixed distance from the drive roller and the support profile, such that when the position of said supports or brackets varies with respect to the respective pedestals so as to change the drawing conditions, said bottom roller is moved together with the brackets and accordingly with the drive roller and the support profile assembled thereon.
- This feature assures that the trajectory of the bottom aprons stays fixed, that the length of said trajectory remains invariable and that the tension of the bottom aprons supported on the drive roller, the support profile and the bottom roller is not modified when the position of the brackets or supports changes with respect to the fixed pedestals.
- the bottom roller can be assembled on an auxiliary part fixed to the bracket supporting the drive roller and the support profile of the bottom aprons or belts.
- said auxiliary part and the bracket are assembled on opposite surfaces of the pedestal and fixed to one another by means of a clamping member which fixes them by means of pressure on the fixed pedestal, such that when the position of the bracket varies with respect to the fixed pedestal the bottom roller moves at the same time, said bottom roller maintaining the same relative position with respect to the support or bracket and accordingly with respect to the drive roller and the support profile of the bottom apron or belt, without altering the tension of the bottom apron or belt.
- the bottom roller can be a freely rotating roller or it can be linked to the drive roller by means of a transmission forcing it to rotate simultaneously with said drive roller and with the same linear velocity.
- One of the roving frame drawing trains comprising a fixed pedestal (1) and a collapsible drawing arm (2), shown in the operating position, can be seen in Figure 1.
- Pressure rollers (3) and a top apron (4) associated to one of said rollers are assembled on the drawing arm (2).
- bottom apron (6) is assembled on a drive roller (7), a support profile (8) and a bottom roller (9), which are kept in a fixed relative position.
- the drive roller (7) and the support profile (8) are assembled on a support or bracket (10) whereas the bottom roller (9) is assembled on an auxiliary part (11) which is fixed to the bracket (10) by means of a clamping screw (12).
- the bracket or support (10) and the auxiliary part (11) are respectively assembled on the top area and bottom area of a guide of the fixed pedestal (1), the clamping screw (12) passing through a longitudinal groove (13) defined in said guide of the pedestal (1), such that by loosening the screw (12), the bottom apron or belt (6) control device assembly can move with respect to the pedestal (1), and when the screw (12) is again tightened, the device is immobilized in the desired area, the bottom cylinder (9) returning to the same relative position with respect to the drive roller (7) and the support profile (8), without changing the trajectory or the tension of the bottom apron (6).
- the auxiliary part (11) supporting the bottom roller (9) can have a top extension with a seating (14) for supporting a transverse profile (15) having U-shaped guides (16), the purpose of which is to prevent lateral movement of the bottom apron (6), assuring the support thereof on the corresponding knurled area of the drive roller (7), as shown in Figure 2.
- the bottom roller (9) can have a great length so as to assure support thereon of a larger or smaller number of bottom aprons (6), and that said bottom roller (9) can be a freely rotating roller or can be linked to the drive roller (7) by means of a transmission device, such that it rotates at the same linear velocity as said drive roller (7).
- Figure 6 shows an embodiment example of this transmission consisting of an intermediate pinion (17) transmitting the rotation of pinion (18), associated to the drive roller (7), to pinion (19) associated to the bottom roller (9).
- the bottom apron or belt (6) control device can be fixed in the desired position on the fixed pedestal (1) and its position can subsequently be changed without causing any change whatsoever in the relative position of the bottom roller (9) with respect to the drive roller (7) and the support profile (8) and without changing the trajectory or tension of the bottom apron or belt (6).
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Textile Engineering (AREA)
- Spinning Or Twisting Of Yarns (AREA)
Abstract
Description
- The present invention is related to a bottom belt or apron control device in roving frame drawing trains.
- Roving frames are provided with a drawing train for the corresponding roving for each production spindle. Each drawing train has several freely rotating pressure rollers associated to a drawing arm located on a fixed pedestal with the ability of being moved between an inoperative position and an operative position in which the pressure rollers act tangentially against roving drawing rollers.
- These drawing trains have a top apron or belt associated to the drawing arm and a bottom apron or belt assembled on one of the bottom rollers for each production spindle. These aprons or belts serve to accompany the slivers entering the drawing train during the production process until obtaining the roving.
- These top and bottom aprons are generally arranged in the second or third drawing line, and the drawing system can have three or four lines.
- In the working position, the top and bottom aprons can be vertically aligned or one can be slightly ahead of the other, depending on the characteristics of the drawing to be performed.
- In any case, the drawing of both aprons occurs as a result of the pressure exerted by the cylinders or rollers supporting them, such that the top and bottom aprons are pressed together at the point of contact between both rollers.
- It is also customary for the bottom roller, made of steel, to be motor-driven so as to cause the forward movement of the bottom apron, and that the roller associated to the top apron rotates freely, such that both aprons move forward due to the action of the motor-driven roller on the bottom apron, transmitting movement to the top apron.
- In some cases the bottom apron has a reduced length and is assembled on the drawing roller and on a support profile with a shape similar to the top apron; in other cases the bottom apron has a greater length and is assembled on the drawing roller, on the support profile and on a bottom tensioner which is normally spring-operated. The purpose of this tensioner is to keep the apron in its correct position and to assure, in the event that the apron should become jammed, that it cannot become creased, which would cause it to break.
- The use of these tensioners has different drawbacks both in use and in manufacture, and it must be stressed that on one hand the assembly of one tensioner for each bottom apron is required, which considerably complicates and increases the costs of manufacturing of the roving machine taking into account that a standard roving machine can have from 32 to 160 production spindles and therefore just as many tensioners. On the other hand it must also be stressed that these tensioners must be individually regulated manually, it being possible that the aprons are tensed in an unequal fashion and some of them in excess, whereby increasing the friction of these aprons on the support profile and on the tensioner itself, accordingly increasing its resistance to movement. In this situation the bottom apron rotates at a slower speed, loosing tangential velocity and slipping, which is very negative because it creates unequal tension in the produced material and causes defects in the roving.
- When the apron becomes jammed the tensioner gives and the apron loosens, possibly creasing and breaking, so the tensioner looses all its functionality.
- At the same time, when the bottom apron slides over the steel drive roller, rather than rotating it is subjected to considerable wear because the drive roller, which is usually knurled or grooved, scratches the interior of the apron, possibly causing it to break.
- Most tensioners currently used are individual spring-operated tensioners and are assembled on a support rail. In order for the spring to act, generally the same rail is used as a support point and the apron slides due to friction over the end part of the tensioner, this being the main cause of the jams in the apron.
- This support rail for the tensioners is fixed on the fixed pedestal and is therefore independent of the supports or brackets holding the drawing cylinders. This feature entails a drawback upon changing the position of the brackets or supports of the drawing cylinders on the pedestal so as to adjust the carding or drawing since the tensioner does not move, but rather it changes the tension of the apron, causing an unwanted effect.
- The bottom belt or apron control device in the roving frame drawing trains object of the invention, of the type comprising a drive roller for drafting one or more bottom aprons and a support profile for said bottom aprons, the drive roller and the support profile being assembled on a support or bracket that is positioned and fixed on a fixed pedestal, has several special constructive features aimed at eliminating the bottom tensioners, the assembly and adjustment drawbacks these imply and the variation of the tension of the bottom aprons when the position of the brackets or supports varies with respect to the respective fixed pedestals.
- To that end the control device object of the invention comprises a bottom roller allowing the support thereon of one or several bottom aprons, considerably simplifying the construction of the roving frame, and which is fixed either directly or indirectly to the supports or brackets of the drive roller and support profile, kept a fixed distance from the drive roller and the support profile, such that when the position of said supports or brackets varies with respect to the respective pedestals so as to change the drawing conditions, said bottom roller is moved together with the brackets and accordingly with the drive roller and the support profile assembled thereon.
- This feature assures that the trajectory of the bottom aprons stays fixed, that the length of said trajectory remains invariable and that the tension of the bottom aprons supported on the drive roller, the support profile and the bottom roller is not modified when the position of the brackets or supports changes with respect to the fixed pedestals.
- It has been provided in this invention that the bottom roller can be assembled on an auxiliary part fixed to the bracket supporting the drive roller and the support profile of the bottom aprons or belts.
- In this case, said auxiliary part and the bracket are assembled on opposite surfaces of the pedestal and fixed to one another by means of a clamping member which fixes them by means of pressure on the fixed pedestal, such that when the position of the bracket varies with respect to the fixed pedestal the bottom roller moves at the same time, said bottom roller maintaining the same relative position with respect to the support or bracket and accordingly with respect to the drive roller and the support profile of the bottom apron or belt, without altering the tension of the bottom apron or belt.
- According to the invention the bottom roller can be a freely rotating roller or it can be linked to the drive roller by means of a transmission forcing it to rotate simultaneously with said drive roller and with the same linear velocity.
- To complement the description being made and for the purpose of aiding in understanding the features of the invention, a set of drawings is attached to the present specification in which, with an illustrative and non-limiting character, the following is shown:
- Figure 1 shows a schematic profile view of a roving frame drawing train provided with the bottom apron or belt control device of the invention.
- Figure 2 shows a partial top plan view of two fixed pedestals on which the bottom drawing rollers and the bottom belt or apron control device are assembled.
- Figure 3 shows a schematic profile view of the drawing device object of the invention and in which a part of the auxiliary part holding the bottom roller has been removed.
- Figure 4 shows a partially sectioned profile view of a fixed pedestal on which only the bottom apron drawing device has been shown, also partially sectioned.
- Figure 5 shows a profile view of the drawing device assembled on a fixed pedestal and in which an embodiment example of the auxiliary part for the assembly of the bottom roller can be observed, said auxiliary part having a top slot for supporting a profile having means for guiding the bottom apron without the ability of lateral movement.
- Figure 6 shows a schematic profile view of the drive roller and the bottom roller linked by means of a transmission forcing the bottom roller to rotate at the same linear velocity as the drive roller.
- One of the roving frame drawing trains comprising a fixed pedestal (1) and a collapsible drawing arm (2), shown in the operating position, can be seen in Figure 1. Pressure rollers (3) and a top apron (4) associated to one of said rollers are assembled on the drawing arm (2).
- Drawing rollers (5) and a bottom apron or belt (6) which are opposite the pressure rollers (3) and the top apron (4), respectively, are assembled on the bottom pedestal (5).
- As can be seen with greater clarity in Figure 3, the bottom apron (6) is assembled on a drive roller (7), a support profile (8) and a bottom roller (9), which are kept in a fixed relative position.
- The drive roller (7) and the support profile (8) are assembled on a support or bracket (10) whereas the bottom roller (9) is assembled on an auxiliary part (11) which is fixed to the bracket (10) by means of a clamping screw (12).
- As can be seen in Figure 4, the bracket or support (10) and the auxiliary part (11) are respectively assembled on the top area and bottom area of a guide of the fixed pedestal (1), the clamping screw (12) passing through a longitudinal groove (13) defined in said guide of the pedestal (1), such that by loosening the screw (12), the bottom apron or belt (6) control device assembly can move with respect to the pedestal (1), and when the screw (12) is again tightened, the device is immobilized in the desired area, the bottom cylinder (9) returning to the same relative position with respect to the drive roller (7) and the support profile (8), without changing the trajectory or the tension of the bottom apron (6).
- As is shown in the embodiment example of Figure 5, the auxiliary part (11) supporting the bottom roller (9) can have a top extension with a seating (14) for supporting a transverse profile (15) having U-shaped guides (16), the purpose of which is to prevent lateral movement of the bottom apron (6), assuring the support thereof on the corresponding knurled area of the drive roller (7), as shown in Figure 2.
- It must be stressed that the bottom roller (9) can have a great length so as to assure support thereon of a larger or smaller number of bottom aprons (6), and that said bottom roller (9) can be a freely rotating roller or can be linked to the drive roller (7) by means of a transmission device, such that it rotates at the same linear velocity as said drive roller (7).
- Figure 6 shows an embodiment example of this transmission consisting of an intermediate pinion (17) transmitting the rotation of pinion (18), associated to the drive roller (7), to pinion (19) associated to the bottom roller (9).
- With the previously described configuration, the bottom apron or belt (6) control device can be fixed in the desired position on the fixed pedestal (1) and its position can subsequently be changed without causing any change whatsoever in the relative position of the bottom roller (9) with respect to the drive roller (7) and the support profile (8) and without changing the trajectory or tension of the bottom apron or belt (6).
- Having sufficiently described the nature of the invention as well as a preferred embodiment example, it is stated for all intents and purposes that the materials, shape, size and arrangement of the described elements can be modified providing that this does not alter the essential features of the invention claimed below.
Claims (6)
- A bottom apron or belt control device in roving frame drawing trains, of the type comprising a drive roller (7) for the drawing of one or more bottom aprons (6) and a support profile (8) for said bottom aprons, the drive roller (7) and the support profile (8) being assembled on a support or bracket (10) which is positioned and fixed on a fixed pedestal (1), characterized in that it comprises a bottom roller (9) for supporting one or more bottom aprons (6), said bottom roller (9) being directly or indirectly fixed on the movable support or bracket (10) arranged a fixed distance from the drive roller (7) and the support profile (8) for said bottom aprons (6), the drive roller (7), the support profile (8) and the bottom roller (9) defining means for the external support and the movement of the bottom aprons (6) according to a fixed trajectory of invariable length.
- A control device according to the previous claim, characterized in that the bottom roller (9) is assembled on an auxiliary part (11) fixed to the support (10) of the drive roller (7) and of the support profile (8).
- A device according to any previous claim, characterized in that the auxiliary part (11) and the support or bracket (10) of the drive roller are assembled on opposite surfaces of the pedestal (1) and fixed to one another by means of a clamping screw or element (12) which provides their combined fixing on the fixed pedestal (1).
- A device according to any previous claim, characterized in that the bottom roller (9) is a freely rotating roller.
- A device according to any of claims 1 to 4, characterized in that the bottom roller (9) and the drive roller (7) are linked by means of a transmission forcing them to rotate simultaneously and with the same linear velocity.
- A device according to claim 5, characterized in that the transmission responsible for linking the bottom roller with the drive roller comprises an intermediate pinion (17) transmitting the rotation of pinion (18) associated to the drive roller (7) to pinion (19) associated to the bottom roller (9).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP05380271A EP1801270A1 (en) | 2005-12-19 | 2005-12-19 | Bottom belt or apron control device for drawing frames |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP05380271A EP1801270A1 (en) | 2005-12-19 | 2005-12-19 | Bottom belt or apron control device for drawing frames |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1801270A1 true EP1801270A1 (en) | 2007-06-27 |
Family
ID=37998275
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP05380271A Withdrawn EP1801270A1 (en) | 2005-12-19 | 2005-12-19 | Bottom belt or apron control device for drawing frames |
Country Status (1)
Country | Link |
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EP (1) | EP1801270A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103014952A (en) * | 2011-09-21 | 2013-04-03 | 村田机械株式会社 | Draft device and spinning machine |
EP3730681A1 (en) * | 2019-04-26 | 2020-10-28 | Saurer Intelligent Technology AG | Apron drafting device |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4727626A (en) * | 1984-12-14 | 1988-03-01 | Platt Saco Lowell S.A. | Control of fibers in apron drafting systems of machinery used in the spinning process |
DE10012019A1 (en) * | 2000-03-11 | 2001-09-13 | Rieter Ag Maschf | Apron drafting system for spinning machine includes additional drive roller or drive teeth to reduce slip between apron and drive roller |
EP1350871A2 (en) * | 2002-03-28 | 2003-10-08 | Rieter Ingolstadt Spinnereimaschinenbau AG | Drawing frame for a spinning machine comprising supporting means for fibre supporting aprons |
DE10218876A1 (en) * | 2002-04-26 | 2003-11-13 | Rieter Ag Maschf | Tensioning arrangement for apron on spinning machine drafting system includes a spring-loaded internal rotating guide |
-
2005
- 2005-12-19 EP EP05380271A patent/EP1801270A1/en not_active Withdrawn
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4727626A (en) * | 1984-12-14 | 1988-03-01 | Platt Saco Lowell S.A. | Control of fibers in apron drafting systems of machinery used in the spinning process |
DE10012019A1 (en) * | 2000-03-11 | 2001-09-13 | Rieter Ag Maschf | Apron drafting system for spinning machine includes additional drive roller or drive teeth to reduce slip between apron and drive roller |
EP1350871A2 (en) * | 2002-03-28 | 2003-10-08 | Rieter Ingolstadt Spinnereimaschinenbau AG | Drawing frame for a spinning machine comprising supporting means for fibre supporting aprons |
DE10218876A1 (en) * | 2002-04-26 | 2003-11-13 | Rieter Ag Maschf | Tensioning arrangement for apron on spinning machine drafting system includes a spring-loaded internal rotating guide |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103014952A (en) * | 2011-09-21 | 2013-04-03 | 村田机械株式会社 | Draft device and spinning machine |
EP2573230A3 (en) * | 2011-09-21 | 2016-11-30 | Murata Machinery, Ltd. | Draft device and spinning machine |
CN103014952B (en) * | 2011-09-21 | 2017-06-27 | 村田机械株式会社 | Drafting system and spinning machinery |
EP3730681A1 (en) * | 2019-04-26 | 2020-10-28 | Saurer Intelligent Technology AG | Apron drafting device |
CN111850750A (en) * | 2019-04-26 | 2020-10-30 | 卓郎智能技术有限公司 | Leather collar drafting device |
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