WO2004097087A1 - Slidejet release lever - Google Patents

Abstract

The invention relates to a device for the air treatment of yarn in a yarn channel, at least partly arranged in a movable die base, which may be placed in an open threading position and a closed operating position under spring tension by means of a sliding lever. Said device comprises an integrated release lever with force multiplication for relieving the spring pressure by means of the release lever.

Description

 SlideJet release lever

Technical field

The invention relates to a device for air treatment of yarn in a yarn channel, which is at least partially arranged in a displaceable nozzle plate, the device having a fork-shaped solid yoke with upper and lower support and a spring tension and the nozzle plate by means of a slide lever in an open threading and can be brought into a closed operating position.

State of the art

Air treatment devices for yarn, e.g. Swirling nozzles and air texturing nozzles are known today under the technical term "SlideJet". A SlideJet e.g. According to EP 0 851 945, functionally consists of four core components:

- a nozzle plate with an open yarn channel

- a spring for pressing the baffle plate onto the nozzle plate

- A yoke-like housing

- and a switchable air connection

The housing consists of a solid support frame or yoke, in which the nozzle plate can be pushed back and forth under spring pressure by a switching movement of a slide lever and the device can be brought into an operating position or a threading position. With the sliding movement, the air supply is released or closed at the same time. The design of a SlideJet nozzle must meet two basic requirements.

- Firstly, for the compressed air valve function to release or close the air supply, the locking parts, which can be moved relatively to each other, must be moved under sufficient pressure so that compressed air is not lost due to leaks in any position. - The second basic requirement comes from the yarn treatment process. The yarn treatment takes place primarily in the yarn channel. The yarn channel is formed on the one hand by a nozzle plate with the air supply and on the other hand by an opposite baffle plate. To switch from the operating position to the threading position, the baffle plate is moved relative to the nozzle plate. It is required that there is no gap between the baffle plate and the nozzle plate. A side gap harbors the risk of dust accumulation and thus a deterioration in the operating conditions. Individual filaments can get caught in a gap and tear as a result.

For the two basic requirements, the parts which can be moved relative to one another are pressed against one another by a compression spring. This requires a correspondingly strong slide lever or a strong manual intervention to move the slide lever from one position to the other. The described change from the operating position to the threading position has proven itself very well and is used today as a standard solution. The nozzle plate must be removed and reinstalled from time to time, be it to clean the nozzle plate or to use a different nozzle plate. With nozzle plates in metal, the wear through the thread pass is great. The higher the yarn transport speed and the greater the yarn tension, especially with intermingling nozzles, the faster the nozzle plates have to be replaced. In the state of the art, the replacement takes place in that the spring clamping force for the installation and removal is released beforehand by means of a special plug-in connector.

A solution has become known from WO03 / 069036 in which a suitably designed plastic body is used instead of a solid yoke. Instead of a real spring, the elasticity of the plastic yoke is used. The disadvantage here is a difficult installation and removal of the nozzle plate as well as a poorly definable and relatively small contact pressure and in the long term the loss of the clamping force as a typical property of plastic.

The object of the invention was now to improve the switching function threading and operating position both with respect to the change of nozzle plates and with regard to the optimization of the spring pressure, but in such a way that the advantages of the solutions of the prior art are not lost. Presentation of the invention

The solution according to the invention is characterized in that it has an integrated release aid with force transmission for releasing the spring pressure.

The inventor has recognized that an extra key has the advantage that the spring tension is not inadvertently released in any switching position, but has various disadvantages. It is true that, in relation to the smallness of the air treatment device, a relatively large spring tension is required for the basic functions mentioned above. Practice has shown that the compression spring should exert a clamping force of more than 100 N, preferably 1 20-200 N, so that the required functions are really fulfilled and, above all, the baffle plate is always in good contact regardless of the switching position. For many people, such a spring tension is difficult to lift with bare fingers without additional lever aid in order to remove the nozzle plate from the device or to reinstall it without hindrance. The fact that the release path is only of the order of about one millimeter was completely overlooked in the prior art. This means that the key function according to the invention is completely fulfilled by a structurally relatively small release lever aid with translation, the release aid itself also being able to take over the transmission of the spring pressure. This eliminates the need for an externally insertable key for each changing process and greatly simplifies the corresponding work process. The integrated release aid can be designed in a variety of ways. A key idea of the new solution is that the release aid remains permanently on the device. A release lever can be attached inside and outside of the device. The best solution is currently seen in an integration inside the device. The new invention permits a corresponding number of particularly advantageous configurations, for which reference is made to claims 2 to 17.

Particularly advantageously, a spring tension lever is articulated near the nozzle plate as a shorter lever, the spring pressure being applied in the opposite, somewhat longer lever part. The spring tensioning lever has the advantage that a translation of the force is given for the spring pressure. As in the prior art, the spring pressure is transmitted to the nozzle plate via a baffle plate, the sliding part or the nozzle plate being easily removed from the device after the spring pressure has been released via the baffle plate in the threading position. According to a first embodiment, the spring tensioning lever can be extended for manual operation with a lever part on the lever plate opposite the baffle plate beyond the point of application of the compression spring. The release lever is assigned an additional externally operable manual actuation lever, which is used to reduce the actuation force required to release the spring force with one finger via an additional transmission ratio. Thus, even with a relatively strong compression spring with a small actuating force, for example with the thumb, the spring force on the nozzle plate can be released and this can be removed from the device. The release lever is preferably disc-shaped and arranged in the interior of the device, the baffle plate being articulated on the release lever with little flexibility. The baffle plate is carried resiliently with the release movement of the release lever in such a way that the baffle plate opens slightly tapered when the release lever is actuated. This facilitates the introduction of the nozzle plate or the sliding part, because a slightly conically widening insertion opening is formed.

The device has a yoke designed as a fork-shaped support frame. The yoke is open to the front in the direction of the yarn channel and has an upper and a lower support, the lower support having slide guides and a compressed air connection and the upper support having both the bearing point for the slide lever and for the release lever. The upper carrier is advantageously formed from two parallel carrier walls, the release lever and the slide lever being arranged between the two carrier walls. The release lever is designed as a thin metal plate and guided laterally with sliding plates between the two carrier walls. This means that the parts that are subjected to high forces can be made of metal and the parts that are less or almost not loaded can be made of plastic and that they can be manufactured more easily and more cheaply. In this embodiment with an extended release lever for the threading and operating position, the switching function is mechanically completely separate from the function of releasing the spring pressure or removing the nozzle plate from the device.

According to a second particularly advantageous embodiment of the invention, the slide lever is part of the release aid, such that both the slide movement and the cancellation of the spring pressure can be carried out in a force-translated manner by means of the slide lever.

The actuation of the slide lever preferably comprises two areas, a first area for the sliding movement and a second area for a releasing movement. The great advantage of this solution is that the pressure of the baffle plate against the nozzle plate can be precisely defined in every respect. In the closed operating position, the contact pressure is full. This advantageously also applies during the sliding movement while the thread lies in the yarn channel and is usually pulled through the yarn channel at the transport speed. If the yarn channel is open, the contact pressure can be completely removed without disadvantage and the baffle plate can be lifted off for easy changing of the nozzle plate.

According to a further embodiment, the slide lever has a release cam or release eccentric on its axis of rotation. When the spring tension lever is engaged, the spring pressure is released by actuating the slide lever. Furthermore, the release eccentric can be designed in such a way that when the slide lever is actuated, the slide movement for the nozzle plate and the lifting of the spring pressure, including the lifting of the baffle plate from the nozzle plate, can be coordinated, the spring tensioning force being gradually released during the slide movement.

Advantageously, the baffle plate is articulated on the release lever in such a way that with the release movement the baffle plate "opens your mouth" as it were, for easy insertion and removal of the sliding part. The nozzle plate can be arranged as an interchangeable part within the sliding part, the sliding lever engaging in the sliding part via a driving pin and releasing the mechanical sliding engagement in the threading position. This allows the release lever to be actuated independently of the position of the slide lever, so that on the one hand the actuation of the release lever facilitates the switching movement of the slide lever and on the other hand the nozzle plate or the sliding part can be removed in the threading position.

Brief description of the invention

The invention is explained in more detail with the aid of a few exemplary embodiments. Show it:

1 shows a section through a device according to the invention; 2a shows a position with actuation of the release lever with the baffle plate for the

One or Removal of the sliding part; 2b shows an enlarged detail of the articulated holder of the

Flapper; 3 shows the complete removal of the sliding part; 4 shows a device for air treatment of yarn in closed

Operating position; 5 shows the device of FIG. 4 in the open threading position but without

Thread guides; FIGS. 6a and 6b show another design of the release lever with the nozzle housing open and closed; Figures 7a to 7f the most important subsequent steps for the removal of the sliding plate or nozzle plate; FIGS. 8a, 8b and 8c show a further design idea, the release movement also being activated by the movement of the slide lever via a release cam; Figures 9a, 9b and 9c instead of a cam a release eccentric for the

Release function; Figures 10a to 10c different views of a closed nozzle with built-in thread guide; Figures 1 1 a to 1 1 d with different views of a closed nozzle

Thread guides which are arranged at a greater distance from the nozzle housing.

Ways and implementation of the invention

FIG. 1 shows a section through a device of the first solution for air treatment of yarn, part of the housing 1 and above all the slide lever being omitted. This allows the movement function of the new solution to be illustrated more clearly. Of the housing 1, only the lower carrier 2 is shown. The upper carrier 3 (Figure 5) is omitted. A release lever 4 is articulated in the upper support 3 via an axis of rotation 5, the axis of rotation 5 being marked as a circle with a dot in the middle, in order to express that the axis of rotation 5 is stationary with the housing 1. In the front part, the release lever 4 has an approximately circular nose 6, which engages in a correspondingly convex shape 7 of a baffle plate 8 (FIG. 2b). The baffle plate 8 is held in the nose 6 via a joint 9, so that the baffle plate 8 has minimal adaptability compared to a nozzle plate 10 (FIG. 5) or a flat nozzle plate surface 10 ′ (FIG. 3). The release lever 4 has a short lever arm KH and a long lever arm LH with respect to the axis of rotation 5, which results in a power transmission of, for example, 1: 3 for actuating the release lever 4. The release lever 4 is also a spring tensioning lever, which is referred to as FSH. The aspect ratio is KH: FSH from the example 1: 2 shown. The spring force FK of a compression spring 1 1 is thus doubled, which is indicated by arrow 12 or 2FK in FIG. 1. This means that the baffle plate 8 presses the baffle plate 10 with double spring force.

One consequence of the pressing force of the baffle plate 8 on the nozzle plate 10 is that the nozzle plate 10 or the corresponding sliding part 13, in which the nozzle plate 10 is embedded, can be displaced horizontally with a corresponding force, but cannot be removed from the device. In the prior art, the spring force was released using a special key for this purpose. The new invention now proposes to achieve the release function via the release lever 4 by a release force LK, the release force acting on the long lever arm LH. Dash-dotted line shows the lever part 14 of the lever arm LH extended for manual operation (HB). The lever ratio is even greater due to the outwardly protruding lever part 14. The exemplary embodiment shown in FIG. 1 is not only a more compact design, but also permits a further reduction in the actuation force required for manual actuation with an additional manual actuation lever 15. The manual control lever 15 is held by a bolt 1 6 from the upper carrier 3 and can only perform a small pivoting movement according to arrow 17. FIG. 1 shows the situation with full action of the spring force via the baffle plate 8 on the nozzle plate 10. At the right outer end, the release lever 4 has an approximately circular segment-shaped engagement point 18, which is additionally marked with an R. A pressure surface 19 is attached to the release lever 4 as a counterpart. The result of this is that when the manual operating lever 15 is pressed around the hinge point 16, the release lever is lowered clockwise downward, the spring tension force FH is released and the force engagement of the baffle plate 8 on the nozzle plate 10 is released, so that the nozzle plate 10 or the sliding part 1 3 can be freely removed from the device. FIGS. 2a and 3 also show a rotation axis 20 marked in black, which, like the rotation axis 5 and the bolt 16, is also fixed in the upper support 3. A slide lever 21 (FIGS. 4 and 5) is held on the axis of rotation 20. As will be explained in the following, by moving the slide lever 21 upwards, a driving pin 22 can move the slide part 1 3 horizontally via a corresponding engagement pocket 23 (FIGS. 1 to 3). In the fully open position or the threading position according to FIG. 5, the driving pin 22 releases the engagement, but the spring force continues to press the baffle plate 8 onto the nozzle plate 10. FIG. 2a shows the driving pin 22 in the open threading position and at the same time in a release position. The arrow 30 indicates that the manual operating lever 15 is pressed against the housing 1 as far as it will go. The manual control lever 1 5 has pivoted slightly about the bolts 16 and raised the release lever together with the baffle plate 8 via the engagement point 18 or the pressure surface 19, which is somewhat exaggerated in the drawing. This is the situation for the release of the nozzle plate or the sliding part in order to remove it completely from the device. FIG. 2a shows the removal movement with a horizontal arrow 31. The air valve function can be seen at the same time from FIGS. 1 and 2. In FIG. 1, the compressed air connection bores 32 in the lower support 2 and the injection duct 33 in the sliding part match. In this position, compressed air can be blown into the yarn duct 44 via a blown air bore 34. In Figure 2a, the two holes 32, 33 are offset (VL). The compressed air connection remains closed as long as the spring force FK acts on the nozzle plate 10. In the situation according to FIG. 2a, the compressed air must be switched off.

FIG. 2b shows an enlargement of a detail with respect to the baffle plate 8 or the nose 60. The detail shows an advantageous embodiment of the release lever with two sliding plates 36 guided and moved in parallel, to which a resilient nose part 35 is attached. The resilient nose part 35 takes the baffle plate with it during the opening and closing movement (FIG. 2a).

FIG. 3 shows with arrow 34 the complete removal of the sliding part 13 from the device.

In the following, reference is made to FIGS. 4 and 5. FIG. 4 shows the closed operating position of a yarn treatment device 40. The sliding lever is accordingly in the lowered position. The yarn 41 passes through the yarn channel and receives a special structure, be it a swirl or a texturing, for example in the form of a swirled yarn or a loop yarn 41 *. Depending on the specific yarn treatment, thread guides 42 are attached to the housing 1 or to the slide lever 21, as shown in FIG. An air connection nipple 43 is additionally shown in FIG. FIGS. 4 and 5 correspond to the solution according to FIGS. 1 to 3. In FIG. 5, the release lever 4 can be seen how it is made like a disk, preferably made of steel. In contrast, the two sliding plates 36 are made of plastic. The nozzle plate 10 and the baffle plates are very particularly preferably made of ceramic. The upper support has two parallel support walls 3, 3 ', which have the flat release lever 4 in the middle as well as two sliding plates, preferably made of plastic. FIG. 5 shows on the one hand the open threading position with the thread channel 44 exposed and on the other hand the position for the start of the actuation of the release lever, as indicated by the dashed arrow 30 '.

FIGS. 6a and 6b each show a different embodiment of the release lever 14 in the open or closed position, which corresponds to the dashed extension 14 in FIG. 1. With a force exerted from top to bottom, according to arrow HB, the release function can also be carried out by hand.

Figures 7a to 7f show the removal of the sliding part. FIG. 7a corresponds to FIG. 4 and shows the closed operating position. The sliding lever is shown in the lowered position of the yarn channel 44 for the passage of the yarn 41, 41 * for air treatment, for which compressed air can be supplied via a connection 43 or a compressed air bore 32, 33 (FIG. 1). By folding the slide lever 21 upwards, the sliding part 1 3 is pushed forward (FIG. 7b) and at the same time the air supply is switched off (FIG. 2), which is accomplished by displacing the two compressed air supply bores 32, 33 by the dimension VL. By pressing a release lever 15 according to arrow 30, the spring pressure force is released via the baffle plate and the engagement of a sliding axis in an engagement groove is released, so that the sliding part 1 3 can be freely pushed forward. The sliding part can now be removed from the device (FIGS. 7d and 7e) and the nozzle plate 10 can be removed from the sliding part 1 3. The reassembly is carried out in the opposite sense to FIGS. 7a to 7f.

Figures 8a to 8c show an embodiment for the second approach. The sliding movement is the same as in the first solution. In the second approach, the slide lever 21 is also part of the release aid. When the slide lever 21 is actuated, the spring force is released in the open threading position with a last region of the slide lever movement and the baffle plate 8 is lifted off slightly. FIG. 8a shows the device in the closed operating position. The spring tensioning lever 50 is mounted on the axis of rotation 5 and presses the baffle plate 8 on the nozzle plate 10 in the counterclockwise direction in the sense of the spring force 2FK via the compression spring 11. In FIG. 8a, a release cam 51 is in the uppermost position and is not under force. FIG. 8b shows the slide lever 21 in the raised position, the slide lever 21 being pressed upward about the axis of rotation 20 in accordance with the angle α. The release cam 51 is already in contact with a lower strut 52, which is part of the Spring tension lever 50, and causes a releasing force according to arrow FKL, so that the spring force 2FK is canceled on the baffle plate 8. This is symbolically indicated by a gap 53 between the baffle plate 8 and the nozzle plate 10. Figure 8c shows the slide lever in the uppermost position. The release cam is in the lowest position and has pressed the spring tensioning lever 50 downwards. With the angle ß the slight lifting of the baffle plate 8 is indicated. In the position according to FIGS. 8a, 8b and 8c, the nozzle plate 10 or the sliding part 13 can be installed or removed from the device without hindrance.

FIGS. 9a to 9c show an exemplary embodiment which has a release cam 54 instead of a release cam 51. The release eccentric has the advantage that the suspension of the spring tension and the lifting of the baffle plate 8 from the nozzle plate 10 can flow smoothly into one another. The sliding movement is at least partially relieved of pressure. According to a further idea, a kind of snap function can be installed by installing a corresponding spring for the slide lever, so that the slide lever is pressed into the two end positions by spring force. This prevents the lever from being in an intermediate position that does not correspond to an open threading position or a closed operating position.

FIGS. 10a, 10b and 10c show a device with an integrated thread guide 42 in a thread guide holder 45. Before the thread channel enters and exits, the thread in the example of FIGS. 10a to 10c is tensioned by 26 °. The thread guide is mounted in the slide lever itself and moves with the slide lever movement.

Figures 1 1 a to 1 1 c show thread guide rollers 46 which are fastened to the housing 1 via holding plates 48 and screws 47. With the larger guying Absp.G. compared to the smaller guy Kl of Figure 1 1 c is also a smaller guy angle of e.g. 1 1, 7 ° provided.

A particularly advantageous design idea for all solutions is that the service position is designed to be self-locking so that the position cannot change by itself.

Claims

claims 1.Device for air treatment of yarn in a yarn channel, which is at least partially arranged in a displaceable nozzle plate, the device having a fork-shaped solid yoke with upper and lower support and a spring tension and the nozzle plate by means of a slide lever in an open threading and in a closed operating position can be brought, characterized in that it has an integrated release aid with power transmission to cancel the spring pressure. 2. Device according to claim 1, characterized in that the spring pressure can be transmitted to the nozzle plate via a baffle plate, the sliding part or the nozzle plate being easily removable from the device by lifting the spring pressure by means of the release aid, in the threading position, in the threading position the baffle plate can be brought into a slightly raised position with respect to the nozzle plate. 3. Device according to claim 1 or 2, characterized in that the spring is part of the release aid. 4. Device according to one of claims 1 to 3, characterized in that the baffle plate is articulated on a spring tensioning lever with low flexibility and is carried along with the release movement of the spring tensioning lever, such that the baffle plate opens slightly conically when the release aid is actuated to the front to facilitate the introduction of the nozzle plate or the sliding part into the device. 5. Device according to one of claims 1 to 4, characterized in that it has a fork-shaped yoke which is open toward the front in the direction of the yarn channel and has an upper and a lower support, the lower support having slide guides and a compressed air connection and the upper support has the bearing point for the slide lever, the compressed air connection having a valve function together with the sliding movement of the nozzle plate. 6. The device according to claim 5, characterized in that the upper carrier is formed from two parallel carrier walls, the spring tensioning lever and the sliding lever being arranged between the two carrier walls. 7. Device according to one of claims 1 to 6, characterized in that the spring tensioning lever is formed as a thin metal plate and is guided laterally with movable sliding plates between the two carrier walls. 8. Device according to one of claims 1 to 7, characterized in that the spring tensioning lever is connected to the baffle plate, the sliding plates movable with the spring tensioning lever forcibly causing the conical opening of the baffle plate via a resilient nose part. 9. Device according to one of claims 1 to 8, characterized in that the nozzle plate is arranged as an interchangeable part within the sliding part, the sliding lever engaging in the sliding part via a driving pin and releasing the mechanical sliding engagement in the threading position. 10. Device according to one of claims 1 to 9, characterized in that the release aid has a release lever with an associated manual operating lever, such that the switching function threading and operating position is completely mechanically separated from the function releasing the spring pressure or removing the nozzle plate from the Contraption. 11. The device according to claim 10, characterized in that the spring tension lever is articulated near the nozzle plate and the spring pressure engages in an opposite longer lever. 12. Device according to one of claims 10 or 11, characterized in that the spring tensioning lever for manual actuation on the lever part opposite the baffle plate is extended beyond the point of application of the compression spring and is preferably disc-shaped. 13. Device according to one of claims 1 to 9, characterized in that the sliding lever is part of the release aid, such that both the sliding movement and the cancellation of the spring pressure can be carried out with power transmission by means of the sliding lever. 14. The apparatus according to claim 13, characterized in that the slide lever has a release cam or release eccentric on its axis of rotation and with the engagement in the spring tension lever by the actuation of the slide lever, the spring pressure can be canceled. 15. The apparatus according to claim 13 or 14, characterized in that the actuation of the slide lever comprises two areas, a first area for the sliding movement and a second area for a releasing movement. 16. The apparatus of claim 13 or 14, characterized in that the release cam or release eccentric is designed such that when the slide lever is actuated, the slide movement for the nozzle plate and the cancellation of the spring pressure including the lifting of the baffle plate from the nozzle plate can be coordinated, so that the sliding movement is at least partially relieved of pressure. 17. The device according to one of claims 1 to 16, characterized in that the spring tension is formed with a compression spring such that a clamping force of 100 to 200 N or more can be applied in the closed operating position.