A warp drawing machine

Abstract

The utility model discloses a warp drawing machine, which has a dropper piece conveying device and a dropper piece transfer device. The dropper piece conveying device includes at least one fixed element with a fixed pin for fixing the dropper piece. Each fixed element is configured to achieve a transfer configuration, which enables the dropper piece to be transferred from the fixed pin to a corresponding track by the dropper piece transfer device. The fixed pin and its corresponding track extend in the same plane. The dropper piece transfer device includes a rotating rake and an actuator for rotating the rotating rake around a rotating axis. The rotating rake includes a plurality of arms regularly distributed around the rotating axis. Each arm defines a pushing surface that can contact a dropper piece fixed with a fixed pin and move the dropper piece out of the fixed pin to the corresponding track during the rotation of the rotating rake. Therefore, the utility model proposes a warp drawing machine with improved dropper piece transfer, which is suitable for quickly transferring the dropper piece from the fixed element to the track.

Description

Technical Field

[0001] The utility model relates to a warp drawing-in machine. Background Art

[0002] In the textile field, a warp drawing machine is used to insert warp yarns into a woven wire harness element prior to weaving.

[0003] Patent publication number CN-C-1083024 discloses transferring a harness element from a fixed element to a receiving track by means of a rotating guide roller and an ejector. The harness element may be a closed heald or a dropper for detecting warp yarn breakage. The ejector is adapted to remove the harness element from the fixed element of the transport device and bring it to the receiving track. The rotating guide roller is adapted to contact the harness element and convey the element along the track while fully rotating. The rotating guide roller is driven to rotate by an actuator. Each ejector is driven in translation by a separate actuator. This combination of continuous motion and its stroke is not suitable for high-speed transfer.

[0004] The utility model aims to provide a drawing-in machine with an improved dropper wire transferring device, which is suitable for quickly transferring the dropper wire from a fixing element to a receiving rail in the drawing-in machine. Summary of the invention

[0005] According to the warp drawing machine described in the utility model, it includes a dropper conveying device, a dropper transfer device and a dropper receiving device. The dropper receiving device includes a plurality of tracks, and the plurality of tracks extend parallel to the longitudinal direction and are adjacent to each other along the width direction perpendicular to the longitudinal direction. The dropper conveying device includes at least one fixed element, and each of the fixed elements includes a fixed pin for fixing the dropper. Each fixed element is configured to cyclically move along the transmission path relative to the track, and to reach a transfer configuration. In the transfer configuration, the dropper can be transferred from the fixed pin to a corresponding track of the dropper receiving device by the dropper transfer device. In the transfer configuration, the fixed pin of the fixed element and the corresponding track extend in the same plane perpendicular to the width direction. The dropper transfer device includes a rotating rake and an actuator, and the actuator is used to rotate the rotating rake around a rotation axis extending parallel to the width direction. The rotating rake includes a plurality of arms regularly distributed around the rotation axis, and each arm defines a pushing surface. The push surface can, in the transfer configuration, come into contact with a drop wire secured by a securing pin of the securing element and move the drop wire out of the securing pin onto the corresponding track during a rotation of the rotary rake about the rotation axis.

[0006] According to another aspect of the utility model, each arm of the rotary rake includes fingers, which are adjacent to each other in the width direction and separated by open slots. The open slots extend parallel to a plane perpendicular to the width direction and exceed the arm. The fingers form a pushing surface of the arm. The number of open slots of each arm is at least equal to the number of tracks in the drop wire receiving device, so that during the rotation of the rotary rake around the rotation axis, each track of the drop wire receiving device can be partially received in the open slot of each arm. During the rotation of the rotary rake around the rotation axis, the open slot of each arm can partially receive the fixing pin of the fixing element in the transfer configuration.

[0007] According to another aspect of the invention, in each rotational position of the rotary rake about the rotational axis, each track of the drop wire receiver is positioned between two adjacent fingers along the width direction.

[0008] According to another aspect of the present invention, each arm includes a polymer insert secured to the finger, and wherein the open slot is defined by two opposing surfaces of the polymer insert along a width direction.

[0009] According to another aspect of the invention, in at least one rotational position of the rotary rake about the rotational axis, a fixing pin and a corresponding track of a fixing element in the transfer configuration are partially received in a same open slot of the rotary rake.

[0010] According to another aspect of the present invention, the fixing pin and the corresponding track overlap along the longitudinal direction when the fixing pin is in the transfer configuration.

[0011] According to another aspect of the present invention, the fixing pin is located above the corresponding track in the vertical direction.

[0012] According to another aspect of the present invention, the rotary rake comprises three arms regularly distributed at 120° around the rotation axis.

[0013] According to another aspect of the present invention, each arm of the rotary rake comprises a folded metal sheet, and wherein an outer end portion of the folded metal sheet extends along a radial direction orthogonal to the rotation axis.

[0014] According to another aspect of the invention, the fixing pin is vertically movable on the fixing element and is pushed by a spring, and wherein the drawing-in machine further comprises a pin releasing device which pushes the fixing pin vertically against the spring in the transfer configuration. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The utility model will combine Figure 1-9The invention is described in detail with an exemplary preferred embodiment. However, this embodiment is not intended to limit the scope of the invention in any way. In the accompanying drawings:

[0016] Figure 1 A front view of a warp drawing machine according to the utility model is shown;

[0017] Figure 2 A perspective view of a warp drawing machine according to the present invention is shown;

[0018] Figure 3 A lateral view of a warp drawing machine according to the present invention is shown;

[0019] Figure 4 A perspective view of an arm of a rotary rake according to the present invention is shown;

[0020] Figure 5 shows a perspective view of a polymer insert according to the present invention;

[0021] Figure 6 Another perspective view of a polymer insert according to the present invention is shown;

[0022] Figure 7 A front view of the drop wire transfer device according to the utility model is shown in a waiting position;

[0023] Figure 8 A front view of the drop wire transfer device according to the present invention is shown in a contact position;

[0024] Fig. 9 A front view of the drop wire transfer device according to the present invention is shown in another rotational position. DETAILED DESCRIPTION

[0025] The utility model relates to a warp drawing machine 1. The warp drawing machine 1 includes a dropper conveying device 2 having at least one fixed element 21, preferably having a plurality of fixed elements 21. Each fixed element 21 includes a retaining pin 24 and a fixing pin 23 engaged in a ring 35 of a single dropper 3. The fixing pin 23 is above the retaining pin 24 along the vertical direction Z21. The dropper 3 is fixed to the fixed element 21 by the fixing pin 23 cooperating with the upper surface of the ring 35. The retaining pin 24 is used to limit the oscillating movement of the dropper 3 on the fixed element 21 and cooperate with the lower surface of the ring 35. Each of the plurality of fixed elements 21, in such a way that the pin 23 and the pin 24 of the fixed element 21, is cyclically moved along a conveying path by one of two belts 22 to move the dropper 3 from a dropper supply position P31 to one of a plurality of receiving positions P32, and then back to the dropper supply position P31. Each belt 22 is driven by a dedicated motor 26. The dropper 3 is supplied to the dropper conveying device 2 at the dropper supply position P31 from a pile of dropper 3 by the dropper supply device 8. Between the dropper supply position P31 and the receiving position P32, the dropper is stopped at the threading position P33, in which the threading device (not shown) of the drawing-in machine 1 inserts the yarn (not shown) into the eyelet 34 of the dropper 3.

[0026] The fixing pin 23 is movable on the fixing element 21 and can be offset relative to the retaining pin 24 fixed to the fixing element 21. Figure 1 The spring 25 visible in the figure pushes upwards, Figure 1 1 shows a cross section through a fixing element 21 of the drop wire transport device 2. The fixing pins 23 and the retaining pins 24 extend generally in the horizontal direction.

[0027] The drawing-in machine 1 further comprises a drop wire transfer device 7 which is configured to transfer the drop wires 3 from the fixing pins 23 located in the transfer configuration to corresponding tracks 51 of the receiving device 5 .

[0028] The receiving device 5 comprises a plurality of rails 51, in particular 6 rails 51. In a variant not shown, the receiving device 5 comprises 4 rails 51. The plurality of rails 51 all extend parallel to the longitudinal direction X51. The width direction W51 or transverse direction is defined as being perpendicular to the longitudinal direction X51, and the plurality of rails 51 are adjacent to each other along the width direction W51. In a preferred embodiment, the width direction W51 and the longitudinal direction X51 are perpendicular to the vertical direction Z21. When the dropper 3 is hung on the rails 51, the rails 51 extend through the loops 35 of the dropper 3. In a preferred embodiment, each rail 51 comprises a longitudinal end profile 511, which forms an extension of the rail in the direction of the conveying path, so that the longitudinal end profile helps the dropper to engage with the rail 51. Each rail 51 is supported relative to the drawing-in housing by a support 512, which is located at a distance from the longitudinal end profile 511, so that the longitudinal end profile 511 is cantilevered.

[0029] The receiving position P32 along the width direction W51 depends on the warp drawing method. Each receiving position P32 of the warp drawing machine 1 faces the rail 51 along the longitudinal direction X51.

[0030] The drawing-in machine 1 further comprises a pin releasing device 6, which is configured to stop the fixing element 21 in the receiving position P32 so that the fixing pin 23 overcomes its spring 25 and moves toward the retaining pin 24, thereby reducing the friction between the retaining pin and the ring 35 of the dropper 3. The pin releasing device 6 comprises a motor 61 and a push plate 62, which is moved vertically relative to the receiving device 5 by the motor 61.

[0031] The drop wire transfer device 7 comprises a rotary rake 71, which rotates around a rotation axis Y71, which has a fixed position relative to the track 51 of the receiving device 5 and is horizontal and perpendicular to the longitudinal direction X51 of the track 51, in particular, parallel to the width direction W51. In particular, the rotation axis Y71 is located above the track 51 of the receiving device 5 in the vertical direction Z21. The rotary rake 71 has three identical arms 711, which include fingers 712 adjacent to each other along the width direction W51. The three arms 711 are fixed to a rotary rake shaft 713, for example, by screws. Therefore, the three arms 711 rotate together around the rotation axis Y71. The three arms 711 are regularly distributed at an angle of 120° around the rotation axis Y71. The rotary rake shaft 713 is rotatably supported by two side plates 72, which are fixed to the shell of the drawing-in machine 1. The rotation of the rotary rake 71 around the rotation axis Y71 is driven by a dedicated actuator 73, which is preferably a stepper motor, and occurs in a single rotation direction (identified as R71 in the figure). In other words, the rotary rake 71 is never driven in a rotation direction opposite to the rotation direction R71. The output shaft 731 of the actuator 73 of the drop wire transfer device 7, which extends parallel to the rotation axis Y71, is connected to the rotary rake shaft 713 by a belt 732, so that the rotation of the output shaft 732 of the actuator 73 of the drop wire transfer device 7 causes the rotation of the rotary rake shaft 713, thereby causing the rotation of the arm 711 and the finger 712 around the rotation axis Y71.

[0032] Each arm 711 comprises a folded sheet metal. Two bending lines of the folded sheet metal are parallel to the width direction W51 and define three planar portions 7111, 7112 and 7113 of the arm 711. When the arm 711 is mounted on the rotating rake shaft 713 at the level of the portion 7111, the portion 7111 extends parallel to the radial direction relative to the rotation axis Y71. The portion 7112 is located between the portion 7111 and the portion 7113 and extends perpendicularly to the portion 7111. The portion 7112 and the portion 7113 form an angle A712 of 145°, in particular, the degree of the angle A712 is between 120° and 150°. Therefore, the portion 7113 forms the outer end portion of the arm 711 opposite to the rotation axis Y71. The portion 7113 extends along a direction T71, which is not coplanar with the rotation axis Y71 and is orthogonal to the rotation axis Y71. For each arm 711 of the rotating rake 71, the end of the arm 711 is turned towards the rotation direction R71. Some recesses are provided by the folded metal sheet to reduce the weight of the rotating rake 71. The polymer inserts 714 are fixed, in particular clamped, on the folded metal sheet forming the arms 711. Each polymer insert 714 has a planar outer surface S714.

[0033] The fingers 712 are separated by open slots 716 extending through the arm 711 in a plane perpendicular to the width direction W51. The open slots 716 are defined along the width direction W51 by two outer surfaces S714 of the polymer insert 714, which are opposite to each other along the width direction W51. Each open slot 716 of each arm 711 extends from an inner end located between the rotation axis Y71 and the bending line of the arm 711 to an outer end located at the edge of the outer end portion 7113 of the arm 711 opposite to the rotation axis Y71. Each open slot 716 is open at the level of the outer end and passes through the entire thickness of the folded metal sheet forming the arm 711. Each open slot 716 forms an empty open volume in the rotating rake 71. The width W716 of each open slot 716 is greater than the width W51 of the track 51 and greater than the width W23 of the fixing pin 23 as the upper pin of the fixing element 21. The width W716 is less than the drop wire width W3. In particular, the width W51 of the rail 51 is greater than the width W23 of the fixing pin 23, which is the upper pin of the fixing element 21. The number of opening slots 716 of each arm 711 is at least equal to the number of rails 51, that is, at least equal to the number of possible receiving positions P32 along the conveying path of the drawing-in machine 1. In the present embodiment, the number of opening slots 716 of each arm 711 is equal to six.

[0034] The material of the polymer insert 714 is selected to provide less friction with the rail 51 when the rotating rake 71 rotates. For example, the polymer insert 714 is made of PEEK (polyetheretherketone) or POM (polyoxymethylene). Some recesses enable the polymer insert 714 to be clamped on the folded metal sheet.

[0035] The outer surface of each arm 711, at the level of the outer end portion 7113, forms a push surface 7121 capable of coming into contact with the face 36 of the drop wire 3 fixed by the fixing pin 23 when the fixing pin 23 is in the transfer configuration. Each push surface 7121 covers all receiving positions P32 of the drawing-in machine 1 along the width direction W51. Due to the open slot 716 of each arm 711, each push surface 7121 consists of a surface formed on the finger 712 of the arm 711.

[0036] The drawing-in machine 1 further comprises a controller connected to the motor 26 of the drop wire delivery device 2 , the motor 61 of the pin release device 6 and the actuator 73 of the drop wire transfer device 7 .

[0037] The fixing element 21 brings the dropper 3 with the threaded yarn into the receiving position P32 according to the threading method and is stopped at the receiving position P32.

[0038] The push plate 62 pushes the movable fixing pin 23 downwards towards the fixing retaining pin 24 , which reduces the friction between the drop wire 3 and the fixing element 21 , the fixing retaining pin 24 still being engaged in the ring 35 of the drop wire 3 .

[0039] In the transfer configuration of the fixing pin 23, as Figure 3 As shown, for the sake of clarity, the warp dropper 3 is omitted in the receiving position P32, and the pins 23 and 24 as well as the track 51 extend in the same plane π51 perpendicular to the width direction W51. The ring 35 faces the track 51 along the longitudinal direction X51. Preferably, the fixing pin 23 and the track 51 overlap along the longitudinal direction X51, wherein the fixing pin 23 is located above the track 51 in the vertical direction Z21. In the transfer configuration of the fixing pin 23, the fixing pin 23 is preferably pressed against the spring 25. During the movement of the fixed element 21 along the conveying path at the level of the receiving position P32, the rotating rake 71 does not rotate, and one of the multiple arms 711 is in a waiting position, in which any arm 711 of the rotating rake 71 does not interfere with the movement of the fixed element 21, and in this waiting position, the pushing surface 7121 of one arm 711 faces downward, just above the fixed element 21 in any receiving position P32. The waiting position is as shown in FIG. Figure 7 shown.

[0040] Under the control of the controller of the drawing-in machine, the actuator 73 is activated, the output shaft 731 rotates, and the rotary rake 71 rotates in the rotation direction R71, and the push surface 7121 formed on the arm 711 previously in the waiting position contacts the surface 36 of the drawing-in machine 3. This contact position is as shown in FIG. Figure 8 As shown. More precisely, this contact occurs at the level of two adjacent fingers 712. With further rotation of the rotating rake 71 in the rotation direction R71, the arm 711 pushes the dropper 3 from the pins 23 and 24 of the fixed element 21 toward the track 51 with the push surface 7121 in contact with the dropper 3. In particular, the arm 711 pushes the dropper 3 onto the track 51. During the rotational movement of the rotating rake 71 in the rotation direction R71, a portion of the push plate 62 and the fixed pin 23, which is the upper pin on the fixed element 21, are partially and continuously received in the open slot 716 of the rotating rake 71, which is located on the same vertical plane as the pins 23 and 24, and thus does not interfere with the rotation of the rotating rake 71. Then, the corresponding track 51 is partially received in the open slot 716 of the rotating rake 71, which is located on the same vertical plane as the corresponding track 51, and thus does not interfere with the rotation of the rotating rake 71. In at least one rotational position of the rotating rake 71 about the rotation axis Y71, for example Fig. 9 In the rotational position, the corresponding rail 51 and the fixing pin 23 in the transfer configuration are partially received in the same open groove 716.

[0041] With the push surface 7121 still in contact with the dropper 3, the continued rotation of the rotary rake 71 in the rotation direction R71 further pushes the dropper 3 on the corresponding track 51. When the next arm 711 reaches the waiting position, the rotation of the rotary rake 71 stops. The rotary rake 71 has flipped 120° around the rotation axis Y71 between the two waiting positions. The actuator 73 rotates the rotary rake 71 stepwise by 120° around the rotation axis Y71 in the rotation direction R71.

[0042] Depending on the threading pattern, a plurality of fixing elements 21 may be simultaneously located at corresponding receiving positions P32 , in which case the rotation of the rotary rake 71 causes a plurality of drop wires to be transferred from the fixing elements 21 in the transfer configuration to a plurality of corresponding rails 51 .

[0043] Due to the rotary rake 71 of the present invention, the only rotational movement of the rotary rake 71 is in the rotational direction R71 to remove the dropper 3 from the fixed element 21 of the conveying device 2, bring the dropper 3 to the corresponding track 51, and convey the dropper 3 along the track 51.

[0044] Due to the plurality of regularly distributed arms 711, the rotating rake 71 is configured to contact the drop wire every 120° rotation around the rotation axis Y71. Therefore, the rotation angle of the rotating rake 71 for achieving drop wire transfer is smaller than that of the prior art, and a higher drop wire transfer rate can be achieved than that of the prior art.

[0045] Due to the multiple regularly distributed arms 711, in each rotational position of the rotating rake 71 around the rotation axis Y71, each track 51 of the warp stop sheet receiving device 5 is located between two adjacent fingers 712 of one arm 711 of the rotating rake 71 along the width direction W51, which is used for optimal guidance of the rotation of the rotating rake 71 and / or optimal positioning of the track 51 along the width direction W51.

Claims

1. A warp drawing machine (1), characterized in that: The warp drawing machine (1) comprises a drop wire conveying device (2), a drop wire transferring device (7) and a drop wire receiving device (5); The drop wire receiving device (5) comprises a plurality of rails (51), the rails (51) extending parallel to a longitudinal direction (X51) and adjacent to each other along a width direction (W51) perpendicular to the longitudinal direction (X51); The dropper sheet conveying device (2) comprises at least one fixing element (21), each fixing element (21) comprising a fixing pin (23) for fixing a dropper sheet (3), each fixing element (21) being configured to cyclically move along a conveying path relative to the track (51) and to reach a transfer configuration in which the dropper sheet (3) can be transferred from the fixing pin (23) to a corresponding track (51) of the dropper sheet receiving device (5) by a dropper sheet transfer device (7); In the transfer configuration, the fixing pin (23) and the corresponding track (51) of the fixing element (21) extend in a same plane (π51) perpendicular to the width direction (W51); The drop wire transfer device (7) comprises a rotating rake (71) and an actuator (73), wherein the actuator (73) is used to rotate the rotating rake (71) around a rotation axis (Y71), wherein the rotation axis (Y71) extends parallel to the width direction (W51); Wherein, the rotating rake (71) includes a plurality of arms (711) regularly distributed around the rotation axis (Y71), each of the arms (711) defines a pushing surface (7121), and the pushing surface (7121) is capable of contacting the warp drop sheet (3) fixed by the fixing pin (23) of the fixing element (21) in the transfer configuration, and moving the warp drop sheet (3) out of the fixing pin (23) to the corresponding track (51) during the rotation of the rotating rake (71) around the rotation axis (Y71).

2. The drawing-in machine (1) according to claim 1, characterized in that: The arm (711) of each rotating rake (71) comprises fingers (712) adjacent to each other along the width direction (W51) and separated by open slots (716) extending through the arm (711) and parallel to a plane perpendicular to the width direction (W51); the fingers (712) form a pushing surface (7121) of the arm (711), wherein the number of open slots (716) of each arm (711) is at least equal to the number of rails (716) of the drop wire receiving device (5). The number of tracks (51) is such that each track (51) of the warp drop sheet receiving device (5) can be partially received in the open slot (716) of each arm (711) during the rotation of the rotating rake (71) around the rotation axis (Y71), and wherein, during the rotation of the rotating rake (71) around the rotation axis (Y71), the open slot (716) of each arm (711) can partially receive the fixing pin (23) of the fixing element (21) in the transfer configuration.

3. The drawing-in machine (1) according to claim 2, characterized in that: In each rotational position of the rotating rake (71) about the rotational axis (Y71), each track (51) of the drop wire receiver (5) is positioned between two adjacent fingers (712) along the width direction (W51).

4. The drawing-in machine (1) according to claim 2, characterized in that: Each arm (711) comprises a polymer insert (714) fixed to a finger (712), and wherein the open slot (716) is defined by two opposing surfaces (S714) of the polymer insert (714) along a width direction (W51).

5. The drawing-in machine (1) according to claim 2, characterized in that: In at least one rotational position of the rotating rake (71) about the rotational axis (Y71), the fixing pin (23) and the corresponding track (51) of the fixing element (21) in the transfer configuration are partially received in the same opening slot (716) of the rotating rake (71).

6. The drawing-in machine (1) according to claim 1 or 2, characterized in that: The fixing pin (23) and the corresponding track (51) overlap along the longitudinal direction (X51) when the fixing pin (23) is in the transfer configuration.

7. The drawing-in machine (1) according to claim 6, characterized in that: The fixing pin (23) is located above the corresponding track (51) in the vertical direction (Z21).

8. The drawing-in machine (1) according to claim 1 or 2, characterized in that: The rotating rake (71) comprises three arms (711) regularly distributed at 120° around the rotating axis (Y71).

9. The drawing-in machine (1) according to claim 1 or 2, characterized in that: Each arm (711) of the rotating rake (71) comprises a folded metal sheet, and wherein an outer end portion (7113) of the folded metal sheet extends in a direction (T71) orthogonal to the rotation axis (Y71).

10. The drawing-in machine (1) according to claim 1 or 2, characterized in that: The fixing pin (23) is vertically movable on the fixing element (21) and is pushed by a spring (25), and wherein the drawing-in machine (1) further comprises a pin release device (6) which pushes the fixing pin (23) vertically against the spring (25) in the transfer configuration.

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