TENSIONING DEVICE AND SPINNING MACHINE

Abstract

A tensioning device for a spinning unit and/or stretching device. The tensioning device includes at least one roller, at least one belt, and at least one tension rod. The tensioning device can be transferred from a functional state into a non-functional state. The functional state is designed for positioning position the at least one roller in that the belt is designed and arranged for exerting a tension on the roller, in that the belt is further designed and arranged for running around a section of the roller and a section of the tension rod such that a tension is transferred from the tension rod onto the roller via the belt. In the non-functional state, the tensioning device is designed and configured such as to move the tension rod via tension on the belt, for removing the belt from the tension rod.

Claims

1. A tensioning device for a spinning unit and/or stretching device, comprising: at least one roller; at least one belt; and at least one tension rod; wherein the tensioning device is designed and configured such as to be transferred from a functional state into a non-functional state; wherein, in the functional state, the at least one roller is positioned in that the at least one belt is designed and arranged for exerting a tension on the at least one roller, in that the at least one belt is further designed and arranged for running around a section of the at least one roller and a section of the at least one tension rod such that a tension is transferred from the at least one tension rod onto the at least one roller via the at least one belt; and wherein, in the non-functional state, the tensioning device is designed and configured such as to move the at least one tension rod via tension on the at least one belt for removing the at least one belt from the at least one tension rod.

2. The tensioning device according to claim 1, wherein a transfer from the functional state to the non-functional state is reversible.

3. The tensioning device according to claim 1, further including at least one fastening device which is designed and arranged such as to connect the at least one tension rod to a main body, wherein loosening the at least one fastening device causes the tensioning device to be transferred from the functional state into the non-functional state.

4. The tensioning device-according to claim 3, further including at least one locking device which is designed and arranged such as to, in the functional state, lock the at least one tension rod in at least one direction; and wherein the at least one locking device is further designed and arranged such as to, in the non-functional state, moveably release the at least one tension rod in at least one direction for moving the at least one tension rod via the tension of the at least one belt.

5. The tensioning device according to claim 4, wherein the at least one locking device is fixedly arranged on the at least one tension rod in a socket, wherein, in the functional state, the at least one locking device locks the at least one tension rod in the at least one direction in a corresponding receiving region in the main body; or wherein the at least one locking device is fixedly arranged on the main body in the socket, wherein, in the functional state, the at least one locking device locks the at least one tension rod in the corresponding receiving region in the at least one tension rod in the at least one direction.

6. The tensioning device according to claim 5, wherein the corresponding receiving region is designed and arranged such as to determine a maximum play for the at least one locking device in the at least one direction in the corresponding receiving region for moving the at least one locking device in the corresponding receiving region in the at least one direction for a transfer into the non-functional state.

7. The tensioning device according to claim 5, wherein the corresponding receiving region is designed and arranged such that, in the functional state, the at least one locking device is in contact with a region for locking in the at least one direction, wherein a play is provided, such as to lose contact with the region when transferred into the non-functional state by moving the at least one tension rod, or such as to contact a different region when transferred into the non-functional state.

8. The tensioning device according to claim 5, wherein the at least one locking device is a longitudinal positioning pin.

9. The tensioning device according to claim 1, wherein movement of the at least one tension rod is a tilting about a first axis and/or a rotation about a second axis.

10. The tensioning device according to claim 3, further including at least one movement guide device which is designed and arranged for guiding movement of the at least one tension rod during a transfer into the non-functional state.

11. The tensioning device according to claim 10, wherein the at least one movement guide device is a position pin which is arranged in a socket of the main body and is arranged and designed such as to be received in a receptacle in the at least one tension rod for moving the at least one tension rod relative to the position pin in a play of the receptacle during the transfer into the non-functional state.

12. The tensioning device according to claim 3, wherein the main body is a bottom roller support.

13. The tensioning device according to claim 1, wherein the at least one tension rod is designed and arranged to, in the functional state, protrude with a section of the at least one tension rod around which the at least one belt runs.

14. The tensioning device according to claim 1, wherein the at least one one roller is one of a front bottom roller, a middle bottom roller, and/or a third bottom roller of a spinning unit or a stretching device.

15. A spinning unit comprising the tensioning device according to claim 1.

16. A spinning machine comprising the spinning unit according to claim 15.

Description

[0056] In the following, exemplary embodiments of the invention are described in more detail with reference to figures, showing schematically and by way of example:

[0057] FIG. 1 shows a general overview of a part of an stretching device with a tensioning device;

[0058] FIG. 2 shows a sectional view along the line A-A of FIG. 1 through the stretching device according to the prior art;

[0059] FIG. 3 shows a disassembled tensioning device according to the prior art;

[0060] FIG. 4 shows a sectional view along the line A-A of FIG. 1 through the stretching device according to the invention; and

[0061] FIG. 5 shows a disassembled tensioning device according to the invention.

[0062] The same reference signs are used for elements and structures having the same effect and/or are of the same type.

[0063] FIG. 1 shows an overview of a part of a stretching device 100 with a tensioning device 10 according to the invention. The general structure applies accordingly to the structure according to the invention as described in relation to FIG. 4 and FIG. 5, and also for the prior art as described in FIG. 2 and FIG. 3.

[0064] A stretching device 100 represents a part of a spinning machine which comprises a plurality of roller pairs, of which only the two bottom rollers of a front bottom roller 8 and a middle bottom roller 6 are shown here. A corresponding top roller is associated with these, which are not shown here for reasons of clarity. A rear roller pair is also not shown for reasons of clarity. It may be provided that a fiber bundle (not shown) is fed in a stretching direction A from a rear roller pair via the middle roller pair to the front roller pair. The bottom rollers are driven, as illustrated here by the motors 7 of the front bottom roller 8 and the middle bottom roller 6. In the case of the front bottom roller 8, the force of the motor 7 is transferred to a shaft 3. The top rollers are passive rollers which only follow the movement of the corresponding bottom rollers. The bottom rollers are rotatably mounted in a bottom roller support 16 as a base body. In particular, each roller can be associated with a one-piece bottom roller support 16. The bottom roller support 16 is arranged on a base 17.

[0065] Furthermore, a roller support portion 5 may be provided in which the previously described rotatable mounting takes place. The roller support portion 5 may be assembled from an upper part 5A and a lower part 5B to be able to easily exchange the roller.

[0066] During operation, the roller pairs rotate, in particular, with increasing speed from the rear roller pair to the front roller pair. This stretches the fiber bundle for carrying out a spinning process in the spinning subunit (not shown). Stretching device 100 and spinning subunit together form a spinning unit 200. The stretching device 100 thus represents a subunit of the spinning unit 200.

[0067] In order to stretch the fiber bundle evenly, a belt 1 is provided here, which contacts the middle bottom roller 6 in a section 30 and thus partially runs around it. In the process, the belt 1 also runs around a tension rod 4, also referred to as a bridge, and makes contact with this tension rod 4 only in a section 31, more precisely only at the locations of a guide surface 29 and at a guide edge 28 on which it is deflected.

[0068] The belt 1 is here a running belt which, in an active functional state, runs around the bottom roller 6 and the tension rod 4. The middle bottom roller 6 can be positioned relative to the front bottom roller 8 and also relative to the corresponding top roller (not shown). By positioning the tension rod 4, a (pulling) tension is transferred to the belt 1. Depending on this tension, the middle bottom roller 6 is precisely positioned (fine positioning) and also the running properties of the belt 1 are determined. Both of these together are important for the stretching properties of the stretching device 100, as explained elsewhere. Due to the belt 1 touching the tension rod 4 and sliding past it, the belt 1 is subjected to aging. For this reason, the belt must be changed from time to time to avoid tearing of the belt 1, since this could damage the machine. The belt change is explained in the prior art with reference to FIG. 2 and FIG. 3 and compared with the procedure according to the invention with reference to FIG. 4 and FIG. 5.

[0069] FIG. 2 is a sectional view along the line A-A of FIG. 1 through the tensioning device 10 according to the prior art. The additional details are discussed here. Reference is made to FIG. 1 for the description of the general structure. The general structure of FIG. 1 applies accordingly to the structure according to the invention as described in relation to FIG. 4 and FIG. 5.

[0070] FIG. 2 shows the tension rod 4 with the guide surface 29 in an assembled state, which corresponds to the functional state according to the prior art. The tension rod 4 is fixed by means of a screw 11. The screw 11 is arranged in a screw receptacle 9 in the tension rod. Said screw receptacle 9 is designed, in particular, for receiving the screw head and allows a screw shaft to pass through the tension rod into a thread 12 in the bottom roller support 16, the main body, in the mounted state. A longitudinal position is determined by longitudinal positioning cylinder pins 13, which are arranged in press-in seats 15 in the bottom roller support 16. The longitudinal positioning cylinder pins 13 engage in the receptacles 14 in the tension rod 4, thereby locking the longitudinal position.

[0071] A lateral belt guide pin 34 may also be provided, which prevents the belt 1 from dragging on bottom roller support 16. This lateral belt guide pin 34 is arranged in a press-in seat 35 and terminates planar with the contact area for the tension rod 4 of the base body. A socket 19 for a first lateral belt guide (not shown) is also provided in the tension rod 4. Said lateral belt guide prevents the belt 1 from sliding off the tension rod 4. The lateral belt guides may be designed as lateral belt guide pins 34. Here, the belt 1 is held by the tension rod 4. For a belt change, the tension rod 4 has to be dismantled, as shown in FIG. 3, since the belt 1 otherwise cannot be pulled off, since the tension on the belt 1 is too high to manually pull said belt off the tension rod 4 and/or from the middle bottom roller 6.

[0072] To show additional details, FIG. 3 shows a disassembled tensioning device 10 according to the prior art. It becomes clear that the longitudinal positioning cylinder pins 13 are designed and arranged for engaging in the receptacles 14 and to thus fix, i.e., lock, a longitudinal position. The lateral belt guide pin 34 terminates planar with the bridge receiving region 36 of the bottom roller support 16. The longitudinal positioning cylinder pins 13 are pressed into press-in seats 15 of the bottom roller support 16 in the receiving region 36 of the tension rod 4 to ensure an irreversible connection to the bottom roller support 16.

[0073] The tension rod 4 can be removed from the receiving area 36 after loosening the screw 11 and the accompanying removal from the screw receiving area 9 accompanied by removal from the thread 12. This makes it possible for the tension onto the belt 1 to be loosened, which enables the removal of the belt 1 from the tension rod 4 and from the bottom roller 6. A new belt 1 is then installed and the tension rod 4 has to be mounted again. As a result, the belt 1 is tensioned again.

[0074] The bottom roller support portion 5B is shown which has bores 18 for enabling a connection to the upper part of the roller support portion 5A.

[0075] FIG. 4 is a sectional view along the line A-A of FIG. 1 through a tensioning device 10 according to the invention. In addition to the lateral guide pin 20, a position cylinder pin 21 may also be provided, which is pressed into the bottom roller support 16 into a press-in seat 22. Longitudinal positioning cylinder pins 13 are also provided, which are present, in particular, in press-in seats 15 in the tension rod 4.

[0076] The position cylinder pin 21 is arranged and designed for forming a contact with a corresponding receptacle 23 in the tension rod, which contact can coordinate a movement when the screw 11 is loosened. However, said screw does not have to be removed. Rather, it suffices to loosen said screw such that the two longitudinal positioning cylinder pins 13 come out of the corresponding receptacles 24, which are arranged in the main body 16, for example, by lifting the tension rod 4. As a result, a tilting movement 27 and/or rotational movement 32 about the tilting axis 37 and/or about the rotational axis 32 is enabled. Said tilting movement 27 can be enabled about an axis 37, while the rotation can take place about a linearly independent axis. The position cylinder pin 21 contacts a region of a corresponding receptacle in the tension rod 4 to coordinate and guide the movement of the tension rod 4. Alternatively, the longitudinal positioning cylinder pins 13 can have sufficient play in the corresponding receiving regions to allow movement in the receptacles which allows a corresponding tilting movement 27 and/or rotational movement 32.

[0077] After the screw 11 has been loosened, the belt 1 continues to be under tension. However, this tension causes, in particular, a transition movement into the non-functional state of the tension rod 4 after the screw 11 has been loosened, since the belt material reduces the stored energy and contracts as soon as it is able. This contraction is made possible by loosening the screw 11 and the interaction of the position cylinder pin 21 with the corresponding receptacle 23, after the longitudinal positioning cylinder pins 13 have been removed from their corresponding receptacles 24. Alternatively or additionally, the receptacles 24 for the longitudinal positioning cylinder pins 13 may be provided with a play which already allows a tilting movement 27 as soon as the screw 11 has been loosened, as described above.

[0078] Due to the transition movement (tilting 27 and/or rotation 32) of the tension rod 4 into the non-functional state, the belt 1 is relaxed and can be removed, in particular, without the tension rod 4 being completely disassembled from the receiving region 36. In particular, the screw 11 can still be in engagement with the thread 12.

[0079] FIG. 5 shows a disassembled tensioning device 10 according to the invention. The illustration here serves only to provide a better overview of the structure, but as described previously, disassembly is not necessary, in particular, for transferring the clamping device 10 into the non-functional state. In this context, functional state and non-functional state are, in particular, related to the stretching device 100 and/or the spinning unit 200, wherein the transition is imparted here by the configuration of the tensioning device 10. According to the invention, a disassembly state is thus also added, which is shown here in FIG. 5, which is, however, in particular, not necessary for carrying out the removal of the belt 1 from the tension rod 4.

[0080] The tension rod 4 has press-in seats 15 in which the longitudinal positioning cylinder pins 13 are fastened. Said press-in seats are arranged and designed such that the longitudinal positioning cylinder pins 13 can be accommodated with play in corresponding receptacles 24 provided in the receiving region 36 of the bottom roller body 16.

[0081] The tension rod 4 further has a bore for the screw 11 and a screw receptacle 9 for fixing the tension rod 4 to the receiving region 36.

[0082] Furthermore, the receiving region 36 of the bottom roller support 16 has the position cylinder pin 21, which can engage in a corresponding receptacle 23 of the tension rod 4 to lock the position in a functional state in coordination with the longitudinal positioning cylinder pins 13.

[0083] May, in particular, refers optional features of the invention. Accordingly, there are also developments and/or exemplary embodiments of the invention which additionally or alternatively have the respective feature or the respective features.

[0084] From the combinations of features disclosed in the present case, isolated features can also be taken as needed and used by resolving a structural and/or functional relationship possibly existing between the features in combination with other features for delimiting the subject matter of the claim.

LIST OF REFERENCE SIGNS

[0085]

TABLE-US-00001 1 Belt, running belt 2 Support portion 3 Shaft 4 Tension rod/bridge 5 Support portion 6 Middle bottom roller 7 Motor 8 Front bottom roller 9 Screw receptacle 10 Tensioning device 11 Screw 12 Threaded socket 13 Longitudinal positioning cylinder pin/locking device 14 Pin receptacle in tension rod 15 Pin socket in base body, press-in seat 16 Base body, bottom roller support 17 Base 18 Bores 19 Socket 20 Lateral guide pin 21 Long pin/position cylinder pin/movement guide device 22 Long pin socket in the main body, press-in seat 23 Long pin receptacle in the tension rod 24 Pin receptacle in the main body 25 Pin socket in tension rod 26 Plate 27 Direction of rotation about position cylinder pin/tilting movement 28 Guide edge 29 Guide surface 30 Section of the belt, running around the section of the roller 31 Section of the belt, running around the section of the tension rod 32 Rotation axis/rotational movement 33 Tilting direction about position cylinder pin 34 Lateral belt guide pin 35 Lateral belt guide pin socket, press-in seat 36 Bridge receiving region 37 Tilting axis 100 Stretching device 200 Spinning unit