EP0840706B2 - Yarn feeding device - Google Patents

Abstract

A yarn feeding device (F) has a housing (1), a housing bracket (2) and a holder (5) arranged in the housing bracket for a ring-shaped yarn-tensioning body (4) that has at least one yarn-tensioning element that can be axially pressed against the feeding body. The holder (5) can slide in the bracket (2) between a yarn-tensioning position and a yarn-releasing position relative to the feeding body (3). A quick adjustment mechanism (Q) for the holder (5) that may be manually actuated by a handle (23) is provided in or on the bracket (2) and allows the holder (5) to be moved in a single stroke from the yarn-tensioning position into the yarn-releasing position without changing the set pressing force.

Description

The invention relates to a yarn delivery device specified in the preamble of claim 1 Art.

In one from EP 0 567 045 A and by obvious Prior use known thread delivery device the holder is attached to a slide that runs along the Cantilever is movable. The sled is in one Boom set screw coupled by a pin sitting in the bottom of the sled, which is by means of an eccentric and a handle can be lifted to the carriage by the adjusting screw to decouple. Then the sled can be moved by hand on the boom in the gap position or pull off the boom. With the pen indented, the Gradually slide into the carriage using the set screw Gap position are shifted. The gap position is needed to either the thread brake body or to replace the thread brake element or to thread a new thread, if necessary by hand. The adjustment of the holder by means of the set screw is time consuming and tedious. The adjustment by hand requires considerable skill to Coupling the pin and adjusting the slide, being however, the original pressure setting is not is changed.

In a yarn delivery device known from EP 0 659 918 A1 can be remotely controlled by means of a compressed air cylinder-piston unit in the gap position adjust. A new thread is threaded by pneumatic blowing through the Thread under the lifted thread brake element. Because the piston is acted upon by a return spring is, manual threading or Replacing the thread brake element or thread brake body the risk that the holder automatically moved back in the direction of the braking position. It’s also an expensive and time consuming solution that is unsuitable for a threading device to be threaded manually is.

The invention is based on the object Thread delivery device of the type mentioned at the outset simple way to improve so that the Bring the holder into the split position conveniently and quickly allows and without time pressure a manual threading and / or the replacement of the thread brake body or Thread braking element is or are possible.

The object is achieved according to the invention solved with the features of claim 1.

Is a new thread to thread or The operator can replace the thread braking element by means of the quick adjustment mechanism the holder in one stroke and thus quickly into the Bring gap position and then threading without time pressure or make the exchange. The quick adjustment mechanism is structurally easy to train and accommodate in a space-saving manner, with its handle can be positioned in an optimal position to achieve a to guarantee the most comfortable handling possible, if several thread delivery devices on one textile machine be grouped closely together with accessories should.

The extremely convenient is particularly useful Embodiment according to claim 2. The gap position can be easily manufactured with one hand and eliminate it again. This is expediently Handle positioned and arranged so that it is in the Braking position does not interfere and possibly largely is hidden while in the split position stands out clearly and gives an indication that that the gap position before further use of the Thread delivery device must be eliminated again.

Depending on the design of the thread delivery device, the Grouping of several cooperating thread delivery devices and also from an ergonomic point of view can the mechanism or the handle with or at the free end of the boom, in the course of the boom or even accessible on the housing of the thread delivery device his. The quick adjustment mechanism is even conceivable either from one place or another of the delivery device to be operable, i.e. more as a handle to provide regardless of the Grouping of several thread delivery devices and the working conditions optimal on the textile machine To ensure ease of use. Such embodiments are contained in claims 3 and 4.

The embodiment according to FIG Claim 5, because the holder after pressing the Quick adjustment mechanism reliably in the gap position remains and the handle can be released can to thread or replace both hands to be able to use.

In the embodiment according to claim 6 the quick adjustment mechanism is structurally simple in the mostly given constructions of the thread delivery devices integrate.

Depending on whether a particularly smooth or particularly long-stroke rapid adjustment is required a reduction or translation be provided.

There is usually an adjusting screw for the pressing force the thread braking element is provided, which extends from the holder to an easily accessible place of the thread delivery device, it is appropriate according to claim 7, the quick adjustment mechanism to couple with the set screw to the Moving holder.

A structurally simple and reliable Embodiment follows from claim 8. When twisted the sleeve performs an axial movement, transferred to the adjusting screw and thus the holder becomes. The guideway is either in the sleeve or arranged in the boom itself.

In the embodiment according to claim 9 is the, if necessary, for the adjustment of the pressing force important return spring of the thread brake element profitable in the quick adjustment mechanism integrated that only for movement in one direction has to worry.

A particularly simple embodiment emerges in this context from claim 10. The structurally simple quick adjustment mechanism uses only one pulling element to counter the holder the force of the return spring in the gap position adjust. The return spring takes over in the opposite direction the adjustment task.

Another, alternative and simple embodiment emerges from claim 11. The gear carrier converts the rotary movement of the actuator into the linear movement of the holder. Conveniently, the mechanism is either self-locking or equipped with a lock to the gap position easy and safe to keep for so long, as needed for threading or replacement becomes.

Fig. 1

einen Länggschnitt des Fadenliefergeräts mit einem Einhand-Schnellverstell-Mechanismus,

Fig. 2

einen Teil eines Längsschnitts einer alternativen Ausführungsform eines Fadenliefergeräts,

Fig. 3-6

verschiedene Ausführungsformen von Einhand-Schnellverstell-Mechanismen, und

Fig. 7

eine schematische Seitenansicht eines Fadenliefergerätes, bei dem mehrere Möglichkeiten zur Unterbringung eines Schnellverstell-Mechanismus als Alternativen oder Kombinationen angedeutet sind.

Embodiments of the subject matter of the invention are explained with the aid of the drawing. Show it:

Fig. 1

a longitudinal section of the thread delivery device with a one-hand quick adjustment mechanism,

Fig. 2

part of a longitudinal section of an alternative embodiment of a thread delivery device,

Fig. 3-6

different embodiments of one-hand quick adjustment mechanisms, and

Fig. 7

is a schematic side view of a thread delivery device in which several options for accommodating a quick adjustment mechanism are indicated as alternatives or combinations.

1, 2 and 7 are two embodiments of thread delivery devices F, each with an adjustable Holding device H for a thread brake body 4, with mutually corresponding functions, different in appearance and size Provide components with the same reference numerals are.

1 is on a housing 1, a boom 2 with a boom end part 2a arranged along a storage body 3 approximately parallel to its longitudinal axis from Housing 1 extends away. 1 in its braking position Thread brake body 4 shown an annular Thread brake B works in the usual way with the Storage body 3 together. The thread brake body 4 is on a holder 5 in a manner not shown in detail arranged, the fork or ring-shaped can and is supported in a support body 6. The keeper 5 is either firmly attached to the support body 6 (Fig. 7) or (Fig. 1, 2) on the support body 6 additionally by one to the storage body 3 in an approximately radial axis 11 swiveling (cardan bracket).

On the support body 6, the longitudinally displaceable in the boom 2 is guided, at least one lateral Guide nose 9 may be provided, which in a longitudinal Guide 10 of the boom 2 engages.

The support body 6 has a transverse wall on the inside on, which forms an axial stop 12. The cross wall is Provided with a hole that from a threaded section a set screw 13 is penetrated. A non-rotatable and slidably arranged adjusting nut 16 is screwed onto the set screw 13. Between the adjusting nut 16 and the axial stop 12 can be provided with an O-ring 18 his. On the other side of the axial stop 12 a prestressed coil spring 19 is supported, which penetrates the support body 6 and in the embodiment 1 with its other end at one sleeve-shaped actuator 21, which is the adjusting screw 13 rotatably. The actuator 21 is in one Rotary socket 20 of the boom end part 2a can be rotated and protrudes outwards with a widened head part 22. On the head part 22, a handle 23 is provided with which the adjusting sleeve 21 can be rotated. A head 14 of the Set screw 13 is held in a rotary knob 27, which carries a knurling and on the head part 22 under Interposition of a rotary latch 28 supported is. The actuator 21 is part of a quick adjustment mechanism Q to move the thread brake body between the respective braking position and a gap position, each in one stroke and with one-hand operation.

For this purpose, the actuator 21 is on the outer circumference with at least one slant, e.g. thread-like Provided guide groove 25 into which a formed as a pin Coupling element 24 engages that in the boom end part 2a is firmly attached. The guide groove 25 has expediently blocking sections running in the direction of rotation 25a, into which the coupling element 24 each then occurs when an axial adjustment of the Adjusting sleeve 21 excluded under an axial pressure should be. The adjusting screw 13 is in the adjusting sleeve 21 rotatably mounted and carries a retaining element R, z. B. a circlip through which the reaction force of the thread brake body 4 on the adjusting sleeve 21 and this on the coupling element 24 and the boom 2, 2a is transmitted.

The boom end part 2a contains (Fig. 1) one widened wall 30 and one to the axis of the storage body coaxial thread eyelet 29. The end part 2a is at 31 attached to the boom 2.

In Fig. 1 there is the thread brake body 4 in the braking position, in which it is axially predetermined Axial force is pressed against the storage body 3. This position is either due to the axial stop 12 intercepted adjusting nut 16 defined, or through the balance of forces between the resilient Reaction force of the thread brake body 4 and the force of the spring 19. Is the axial stop 12 in the 1 on the adjusting nut 16, then can be turned by turning the screw 13 the knob 27 of the support body 6 in its leadership adjust to the pressure of the thread brake body to change.

Around the thread brake body 4 in a gap position with respect to the storage body 3, e.g. around a thread with a threading needle or by hand to thread or to clean the thread brake body 4 or replace, the rotary handle 23 is operated and rotates the actuator 21 with one hand so that thanks to the engagement of the coupling element 24 Actuator 21 in Fig. 1 is pulled to the right and over the knob 27 pulls the adjusting screw 13, which in turn via the adjusting nut 16 supporting body 6 and pulls the thread brake body 4 into the gap position. It is expedient to turn the actuator 21 so far expediently over about half a turn, until the coupling element 24 in the left side Blocking section 25a has occurred. To reset of the thread brake body 4 is in the braking position the rotary handle 23 again with one hand in the other Actuated direction, and the actuator 21 again in the in Fig. 1 shown position. The set one Contact pressure of the thread brake body 4 is not changed.

The embodiment of the thread delivery device F 2 has a holding device H, the Support body 6 also by means of a quick adjustment mechanism Q between a braking position and a The gap position is adjustable. In the end part 2a of the boom 2 is the set screw 13 by means of the retaining element R (e.g. a Segerring) axially immovable, however rotatably fixed. The rotary knob 27 works with a right-hand end face of the end part 2a together, in the locking recesses for the rotary locking 28 are molded are. The spring 19 is supported with its right-hand side End directly on a counter surface 32 of the end part 2a from. The holder 5 is with a pivot pin 33 in Support body 6 pivotable about the axis 11.

In addition, a safety device C can be provided be with which the support body 6 in the gap position is intercepted against the force of the spring 19. Of the safety gear C is a manually operated engagement or Release element 34 recognizable, the one against Spring loading indentable or under spring loading Operate disengageable catch element, not shown lets that behind a stop, not shown of the support body 6 engages.

The safety device C is expediently formed so that it can be pressed by pressing the engagement element 34 engages as soon as the thread brake body 4th has reached the gap position. By moving again, either by pulling the holder 5 by hand or by means of the mechanism Q, that is not shown Catch element disengaged and the engagement or disengagement element 34 returned to the position shown, whereupon the spring 19 resets the supporting body 6. Mechanism Q is also activated. Sofem the quick adjustment mechanism Q - as in Fig. 1st - The safety device automatically holds the gap position C not necessary. Such an execution is in view preference for convenient one-hand operation to give. Mechanism Q is only schematic indicated actuator 7 in the end part of the boom 2 on that via a motion-transmitting connection 8 is connected to the carrier body 6.

In the embodiment of Fig. 1 could the spring 19 and the adjusting nut 16 are omitted if the adjusting screw 13 with its threaded section 15 directly into the axial stop 12 Cross wall is screwed.

2 can the actuator 7 may be similar to the actuator 21 in Fig. 1. However, the mechanism is also conceivable To train Q differently, for example as in 3 to 6 indicated.

3 takes effect on Support body 6, which is guided in the boom 2 longitudinally is the adjusting screw in a manner not shown 13 on, the knob 27 at the free end the boom 2 is accessible. The set screw 13 can be moved longitudinally together with the support body 6, with the quick adjustment mechanism Q, which is formed by means of the hand lever 23 Handle can be operated. The set screw 13 can either in the support body 6 or in the mechanism Screw Q together. Between the support body 6 and a stop 32 is the return spring 19 arranged that the support body 6 in the braking position presses, and when you press the Quick adjustment mechanism Q is deformed.

4 is the Quick adjustment mechanism Q with one in the boom 2 about a transverse to the longitudinal axis of the boom Axis 26 rotatable clamping element 15 equipped, that via a tension element 27, e.g. a cable or a chain, is connected to the support body 6. The Return spring 19 is effective between the Support body 6 and an end wall of the boom used and is, for example, penetrated by the adjusting screw 13, axially immovable by means of the retaining element R, but is rotatably mounted in the boom 2. A Set nut 16, which is relative to the support body 6 is non-rotatable, but axially displaceable, determines the respective position of the support body 6, sofem not the balance between the pressing force of the thread brake element not shown in Fig. 4 and the return spring 19 sets the braking position. By Swiveling the clamping element 15 by means of Handle 23 is the tension member 27 of the support body 6 moved to the split position. The tension element 27 shifts from the position shown in FIG. 4 over the axis 26 to the other side, so that an automatic blocking position in the gap position of the support body results. When loosening the clamping element 15, the support body 6 is again by the return spring 19 returned. The set screw 13 makes not this adjustment movement, so that the set Braking position is maintained unchanged.

5, which is the 1 of the embodiment is in the rotary version 20 of the boom 2 axially adjustable and rotatable mounted actuator 21 provided with the handle 23, for the in the boom 2 at an angle to the direction of rotation of the actuator 21 extending guide track 25 is formed is with which when turning the handle 23 Actuator 21 is adjusted axially. The set screw 13 is expediently coupled to the actuator 21. The guideway 25 has at least one end Blocking section 25a, in which the handle 23 against automatic release blocked under an axial force becomes.

In the embodiment of FIG. 6, the Quick adjustment mechanism Q one to one across Rotatable axis lying in the longitudinal direction of the boom Gear carrier 36, e.g. a gear that is in a boom-fixed pivot bearing 37 by means of the handle 23 is rotatable and into counter teeth 35, e.g. of actuator 21 of FIG. 1, or (not shown) in a counter toothing of the set screw engages. A releasable by means of a button 39 on the handle 23 Pawl 38 engages behind a nose 40 in the split position the storage 37 to the support body, not shown in to block the gap position. The gap position will in Fig. 6 by lifting the handle 23 and twisting the toothing carrier 36 counterclockwise set. To reset the button 39 pressed counterclockwise to the jack 38 to solve and the toothing carrier 36 clockwise to turn.

In Fig. 7 it is indicated that in the yarn delivery device the quick adjustment mechanism Q does not is arranged at the free end of the boom 2 (as 1 to 6), but at the free end of the Boom 2 facing away from the support body 6 or even on the housing 1 of the thread delivery device, expediently accessible from the front side 1 'of the housing 1. The handle will be in the optimal Position arranged. Also the knob 27 of the adjusting screw can either be at the free end of the boom or accessible on the housing 1 from the housing side 1 ′ be provided. Mechanism Q might as well optionally from more than one position on the delivery device F can be actuated.

With all the aforementioned execution standards expediently arranged the handle 23 and trained that it does not protrude in the braking position or even housed largely safe is, however, protrudes clearly in the gap position to indicate that before restarting the Thread delivery device readjusted the braking position must become. One-handed operation is considered extraordinary kept appropriate.

The different embodiments of the Quick adjustment mechanism Q are mainly for thread delivery devices provided where the thread only threaded manually or manually using a threading needle is, and / or in which an exchange of the thread brake body or the thread brake element required can be. In particular, this is for those Thread braking elements useful, which under the Influence of the threading needle could suffer because of the direct contact and the application of force to the Threading needle can be damaged. In particular these are thread brakes of modern design with in Circumferential direction of uninterrupted thread braking element or one made of metal or plastic fins existing thread brake element. Furthermore, the through the quick adjustment mechanism adjustable, relative large stroke between the braking position and the gap position useful for thread brakes that need to be replaced relatively much free space compared to the storage body 3 need.

In modern thread brakes, the thread brake body 4 mostly gimbal supported, so the thread brake element perfectly relative to Can center the storage body. 1 is one such gimbal support through the axis 11 and which is only shown as a short black line in the axis, vertical support axis between the Holder 5 and the thread brake element 4 indicated. The mobility of the holder about the axis 11 is expediently in a constructive way on only a few Degrees limited. The mobility of the thread brake element around the perpendicular to axis 11 Axis can also be limited by a pawl K. be a move by a few Angle degree allows or with a bristle ring this couples practically immovably to the holder 5. In Fig. 2 is the pawl K with a slight movement relative to the holder 5 in releasable engagement. It is also conceivable, other means of movement limitation for movements around both cardan axes to be provided, such as swivel bearings or bearing pans with limited range of motion. The handle K also has the advantage of manual threading, a to prevent unwanted tipping of the thread brake element, through which the thread brake element in the Lay the threading path of the threading needle or thread could.

Claims (11)

1. A yam feeding device (F) comprising a housing (1), an extension arm (2) of said housing and a holder (5) which is arranged in the extension arm of said housing and which pertains to an annular yam braking body (4) which comprises at least one yam braking element which can be pressed axially against a storage body (3) of said yam feeding device (F), with the holder being movably guided along the extension arm of said housing and, without a change in the set pressing force, being movable between at least one braking position with an adjustable pressing force of said yam braking element and at least one gap position in which said yam braking element is lifted from said storage body, characterised in that a quick adjustment mechanism (Q) is provided for said holder (5) on or in said extension arm (2), the quick adjustment mechanism (Q) being provided with a handle (23), the holder (5) being moved manually in one stroke at least from the braking position in the gap position via a force and/or displacement increasing or decreasing mechanism provided between said handle (23) and said holder (5) when said handle is actuated manually.
2. The yam feeding device according to claim 1, characterised by a single-hand quick-adjustment mechanism (Q).
3. The yam feeding device according to at least one of claims 1 and 2, characterised in that said quick adjustment mechanism (Q), preferably at least said handle (23), is arranged at the end of said extension arm (2) which faces away from said housing (1).
4. The yam feeding device according to at least one of claims 1 and 2, characterised in that said quick adjustment mechanism (Q), preferably at least the handle (23) thereof, is accessibly arranged on said extension arm (2) at the side of said holder (5) which is oriented toward said housing (1), or approximately in an extension of said extension arm (2) in said housing (1), preferably at the housing side (1') which is oriented away from said extension arm (2).
5. The yam feeding device according to at least one of claims 1 to 4, characterised in that said quick adjustment mechanism (Q), preferably at least in the end position corresponding to the gap position, comprises an automatic holder blocking means (25a, 38, 40).
6. The yam feeding device according to at least one of claims 1 to 5, characterised in that said quick adjustment mechanism (Q) comprises an adjusting member (21) which is supported in said extension arm (2) to rotate about an axis oriented in parallel with or in a direction transverse to the longitudinal direction of said extension arm and which is acted upon by said handle (23) and is connected in motion-transmitting fashion to said holder (5) in the longitudinal direction of said extension arm (2).
7. The yam feeding device according to at least one of claims 1 to 6, characterised in that said quick adjustment mechanism (Q) is coupled with an adjusting screw (14) positioned in the longitudinal direction of said extension arm (2) for adjusting the pressing force of said yam braking element (4).
8. The yam feeding device according to at least one of claims 1 to 7, characterised in that said adjusting member (21) is a sleeve which is rotatable in said extension arm (2) and is supported in an axially displaceable manner and in which said adjusting screw (13) is held in a rotatable, but axially captured manner, that a turning handle is secured to said sleeve as said handle (23), and that either said sleeve in the outer circumference has a guide path (25) inclined towards the rotational direction for guiding at least one engagement element mounted in said extension arm (2), or said extension arm (2) has an inclined guide path (25) for guiding said handle (23) which is formed as a turning handle.
9. The yam feeding device according to at least one of claims 1 to 8, characterised in that a restoring spring (19) is arranged between said holder (5) and an abutment (32) fixed on said extension arm, and that said holder (5) is movable by means of said quick adjustment mechanism (Q) in one direction of movement against the force of said restoring spring (19) and in the opposite direction under the force of said restoring spring (19).
10. The yam feeding device according to claims 1 to 9, characterised in that said quick adjustment mechanism (Q) comprises a pulling element (27) which can be tensioned manually by means of a tensioning element (15), said pulling element (27) being preferably a rope or chain element which is coupled to said holder (5) or to a member connected to said holder (5).
11. The yam feeding device according to at least one of claims 1 to 9, characterised in that said quick adjustment mechanism (Q) comprises a toothed carrier (36) which is rotatable in said extension arm (2) about an axis positioned in a direction transverse to the longitudinal direction of said extension arm and which engages into a counter-toothing (35) of said member which is connected to said holder (5), preferably of said adjusting member (21) or said adjusting screw (13).

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