TWI588312B - Thread finger for a thread-changing device - Google Patents

Description

Wire finger for wire changing device

The present invention relates to a thread finger for a thread changing device for a knitting machine, having an elongated finger body having one end mounted to a pivot rod and having a thread hook for the knitting thread at the other end A take-up region, and a guide member that is displaceably mounted along the finger body and a cutter and a spring-loaded clamp member are displaceable along the finger body along with the guide member.

This wire finger is known from German Patent No. DE 19511949 B4. In order to move the cutting blade and the clamping member toward a row of wires passing through the wire-wounding region, a hollow box-shaped guiding body is disposed around the finger body of the conventional wire finger member. A slip seat receives the finger body and the cutter and the spring-tensioned clamp are disposed within the guide such that they can be displaced along the finger body with the guide body.

Because of the relationship of the guide body surrounding the actual finger body, the conventional wire finger has a relatively large width, so that a plurality of wire changing devices having such wire fingers disposed thereon in parallel with each other are required. The knitting machine has a large installation space. This disadvantage becomes particularly pronounced in the case of stripping attachments that must be operated alternately with up to six different knitting threads. Each of the knitting threads is provided with a separate wire finger in the wire changing device. Because the prior art wire fingers are relatively wide, it is no longer possible to further increase the manageable knitting threads and striping colour. Widening the wire changing device will result in a reduction in the knitting system that can be used on the machine, which is economically unacceptable because it causes the knitting time to become longer.

Accordingly, it is an object of the present invention to provide a wire finger for a wire changing device that can be fabricated with a smaller width than prior art wire fingers.

The above objects of the present invention can be attained by the type of wire fingers mentioned at the outset because the finger body has at least one elongated slot in which the guide is removably mounted.

In the thread finger according to the invention, the guide thus no longer surrounds the finger body but is guided within the finger body. Thus, a structural width of the wire fingers that is much smaller than the construction of prior art solutions can be achieved. A wire changing device equipped with such wire fingers may have a structural width that is smaller than the structural width of the prior art wire changing device, or may have more structural width than the prior art, with the same number of wire fingers The wire fingers are housed within the wire changing device. By means of the thread finger according to the invention, the number of manageable threads in the copying attachment can be increased without lowering the output.

Thus, if the guide member is constructed as a flat member, its thickness can correspond to the width of the at least one longitudinal slot.

In a preferred embodiment, at least the guide member, the cutting blade and the clamping member do not project beyond the sides of the finger body to laterally define the boundary of the at least one elongated slot. The width of the entire wire finger is thus determined by the width of the finger body, which does not need to be larger than the width of the finger body as in the prior art.

The cutting blade and the clamping member can be disposed on opposite sides of the finger body in a known manner. However, the cutting blade and the clamping member may also be disposed on the same side of the finger body. They can be held by the guide against the guide and can be moved parallel to the guide. In the case where they use the guide to move forward, they can reliably perform their functions. The cutting blade cooperates with the cutting of the knitting thread which is formed by the wire hooking region of the finger body to form a cutting edge, and the clamping of the wire end between the clamping member and the finger body by cutting Must be implemented almost simultaneously. The guide member presses the clamping member against the finger body by a spring. The spring can be a separate component or a resilient portion of the clamp itself.

Furthermore, the guide member and the clamping member can be constructed as one piece.

In a preferred embodiment, two longitudinal slots are disposed in the finger body, the guide member passes through the two longitudinal slots with two protrusions, and at least one protrusion is also guided through A slotted opening in the cutting blade and the clamping member. In this manner, the guide can clamp the clamp between itself and the finger body and secure the cutter to the opposite side of the finger body. Because the convex portion of the guiding member passes through both the cutting blade and the clamping member, the cutting blade and the clamping member are also driven during the movement of the guiding member into the longitudinal slot of the finger body. . Therefore, if the guide member passes through the cutting blade and the holder with one of its projections and the end of the cutting blade and the holder facing away from the hooking portion of the finger body is mounted on the guide member The second convex portion would be particularly advantageous. Thus, the cutting blade and the clamping member are fixed parallel to the finger body and simultaneously project beyond the second projection of the guiding member. However, the guide can be secured with its two projections through the cutting blade and the clamping member in a manner parallel to the finger body.

If the clamping member is subjected to a pretension of a separate spring member, the spring is preferably constructed as a leaf spring and held under tension between the two projections of the guiding member. Thus, a preferred three point support for the spring member can be produced. In this way, the gripping effect of the gripping member can be produced in an economical and easy to install manner.

In order to actuate the guide member, an actuating foot can be disposed on a side of the guide opposite the convex portions, the guide member being movable by the actuating member of the wire changing device by the actuating foot At least in the direction of the wire hooking region of the finger body. By actuating the foot, the guide can be collided by a closure of the wire changing device.

Alternatively or additionally, a projection of the guide member may be constructed such that it can be impacted by at least one displacement direction away from the wire hooking region by the coincident moving member of the wire changing device. For example, an opening member of the wire changing device can engage the projection.

Additional benefits may be created if at least the finger body, the cutting blade, the clamping member and the guiding member, and preferably the pivot rod and the spring are fabricated as stamped sheet metal parts. The manufacture of individual components of the wire fingers can be very cost effective. At the same time, these elements have only a minimum material thickness and thus can produce very thin wire fingers.

The present invention relates to a knitting machine having at least one such wire changing device, in addition to a wire changing device for a knitting machine characterized by having a plurality of wire fingers arranged in parallel with each other. machine.

Next, a preferred embodiment of the wire finger member according to the present invention will be described in detail with reference to the accompanying drawings.

The wire finger 10 shown in Fig. 1 has a finger body 11 having a front end having a wire hooking region 12 in the form of a substantially U-shaped recess (which is particularly clear in Figure 2b). The front delimitation of the wire hooking zone 12 is constructed as a cutting edge 13. The rear end of the finger body 11 is mounted on a pivot rod 14 having a bore 15 for receiving a pivot of a wire changer (not shown). In addition, an actuating foot 16 for initiating the pivoting movement is provided. Two longitudinal slots 17, 18 (clearly shown in Figure 2b) are disposed within the finger body 11, and longitudinal slots 18 are also visible in Figure 1. A guide member 19 is inserted into the elongated slots 17, 18 which pass through the longitudinal slots 17, 18 by means of two projections 20,21. A clamping member 24 is disposed between the guiding member 19 and the finger body 11. A cutting blade 22 pressed against the finger body 11 by the spring member 25 is disposed on the opposite side of the finger body 11 from the holding member 24.

The cutter blade 22 and the clamp member 28 and the trailing end of the spring member 25 are mounted on the projection 21. The projection 20 of the guide 19 passes through the slotted opening 26 of the cutting blade 22 (Fig. 6b) and the slotted opening 27 of the clamping member 24 (Fig. 5b) . In this manner, when the actuating foot 28 of the guide member 19 is struck in the direction of the front end by a closure member (not shown) of the wire changing device, the cutting blade 22 and the clamping member are simultaneously 24 is moved toward the wire take-up area 12 and substantially beyond the cutting edge 13. Therefore, a knitting thread passing through the thread take-up area 12 is held between the holding member and the finger body 11 by the holding member 24, and the cutting blade 22 cooperates with the cutting edge 13 to cut the thread. If the knitting thread is later required in the knitting process, it can be supplied to the needle again by the associated wire guide. In order to open the wire finger 10, the projection 21 of the guide member 19 is moved in the direction of the pivot rod 14 by the opening member (not shown) of the wire changing device. Therefore, the wire hooking area 12 is released again for the new wire to be inserted.

As best seen in Figures 1 and 2 through 7, all of the individual components of the wire finger 10 are flat profile members which are preferably fabricated as stamped sheet metal components. The width of the entire wire finger 10 corresponds to the width of the finger body 11 (Fig. 2b). Therefore, the wire finger 10 has an extremely thin configuration. The individual components of the wire finger 10 can be easily replaced. Therefore, in particular, the cutting blade 22 can be easily taken out for re-sharpening. Furthermore, the thread fingers having a guide 19 guided in the finger body 11 can tolerate manufacturing tolerances compared to the manufacturing tolerances of the wire fingers having the box guides surrounding the finger body 11 according to the prior art. A lot bigger.

In Figures 2 to 7, the individual elements of the wire finger 10 are shown separately. Figures 2a and 2b show that the finger body 11 has the wire take-up area 12, the cutting edge 13 and two longitudinal slots 17 and 18 for guiding the guide 19 shown in Figure 3. At the same time, the elongated slots define the position of the guide 19 The path of the movement, and the path of displacement of the cutting blade 22 and the clamping member 24 along the finger body 11. As shown in Fig. 2b, the finger body 11 has a notch 29 at its rear end, the notch being inserted into the pivot rod 14 of the finger body 11 for a guide groove 30 provided for this purpose. The pivot rod 14 is housed in a clamping manner (see Fig. 4). 4 also clearly shows that the pivot rod 14 is provided with a nose portion 31 that engages the longitudinal slot 18 of the finger body when the finger body is mounted on the pivot rod 14. The finger body 11 is then held under tension between the outer delimitation 32 of the guiding groove 30 of the pivot rod 14 and the nose 31.

The detailed drawing of the guide member 19 in Fig. 3 clearly shows that the two projections 20 and 21 can hold the cutter blade 22 and the clamp member 24 between the parallel portions 33 and 34. Further, a notch 35 may be formed on the convex portion 20 into which the front end 36 (Fig. 7a) of the spring 25 can be inserted. The convex portion 21 has a configuration longer than the convex portion 20 such that it can be collided by an opening member of the wire changing device.

The detailed construction of the clamping member 24 in Figures 5a and 5b clearly shows that the element also has a recess 37 at its rear end, by which the clamping member 24 is supported by the projection 21 of the guiding member 19. That part of the 34.

The cutting blade 22 is shown in detail in Figures 6a and 6b, which has a configuration very similar to the clamping member 24, but with a cutting edge 38 at its tip that can be associated with the finger body 11 The cutting edges 13 cooperate to cut the knitting thread.

Finally, Figure 7 shows the spring member 25, which is a leaf spring member and can be stamped with gold having notches 39 and 40 at both ends as shown in Figure 7c. A piece of film. The flat spring member according to Fig. 7c is bent such that it has the shape shown in Fig. 7a. After the spring member 25 is clamped between the projections 20 and 21 of the guide member 19, it has a tensioned shape as shown in Fig. 7b, in which it presses the cutter blade 22 against the finger. The body 11 can thus produce this clamping effect. At the same time, the spring member 25 pulls the guide member 19 via the projections 20 and 21 on the opposite side of the finger body 11 and the holder member 24 abuts against the finger body 11 and thereby produces a clamping effect.

10‧‧‧ silk finger

11‧‧‧ finger body

12‧‧‧ silk picking area

13‧‧‧ Cutting edge

14‧‧‧ pivot rod

15‧‧‧ hole

16. . . Actuate the foot

17. . . Longitudinal slot

18. . . Longitudinal slot

19. . . Guide

20. . . Convex

twenty one. . . Convex

twenty two. . . Cutting knife

twenty four. . . Clamping piece

25. . . Spring piece

26. . . Grooved opening

27. . . Grooved opening

28. . . Actuate the foot

29. . . Notch

30. . . Guide groove

31. . . Nose

32. . . External delimitation

33. . . Parallel part

34. . . Parallel part

35. . . Notch

36. . . front end

37. . . Notch

38. . . Cutting edge

39. . . Notch

40. . . Notch

BRIEF DESCRIPTION OF THE DRAWINGS These drawings include: FIG. 1 is a perspective view of a wire finger; FIGS. 2a and 2b are detailed views of the finger body of the wire finger of FIG. 1; FIG. 3 is a side view of the guide of the wire finger of FIG. Figure 4 is a side view of the pivot rod of the wire finger of Figure 1; Figures 5a and 5b are detailed views of the clip of the wire finger of Figure 1; Figures 6a and 6b are the wire fingers of Figure 1 Detailed drawing of the cutting blade; Figures 7a to 7c are detailed views of the spring member of the wire finger of Figure 1.

10. . . Wire finger

11. . . Finger body

12. . . Concave

13. . . Cutting edge

14. . . Pivot rod

15. . . hole

16. . . Actuate the foot

18. . . Longitudinal slot

19. . . Guide

20. . . Convex

twenty one. . . Convex

twenty two. . . Cutting knife

twenty four. . . Clamping piece

25. . . Spring piece

28. . . Actuate the foot

Claims (12)

A wire finger for a thread changing device of a knitting machine, having a long rectangular finger body (11) having one end mounted on a pivot rod (14) and having the other end having a a wire picking area (12) of the knitting thread; and having a guiding member (19) which is displaceable along the finger body (11), and a cutting blade (22) and a spring force pretensioning clamp The member (24) is displaceable along the finger body (11) by the guide member, characterized in that the finger body (11) has at least one longitudinal slot (17, 18), the guide member (19) ???displaceably mounted in the at least one longitudinal slot, and wherein the guide member (19) presses the clamping member (24) against the finger body (11) by a spring (25), Two longitudinal slots (17, 18) are disposed in the finger body (11), and the guiding member (19) passes through the two longitudinal slots through two convex portions (20, 21), At least one of the equal projections (20) is also guided through the slotted opening (26, 27)' in the cutting blade (22) and in the clamping member (24) and the guide member (19) ) is provided with a fixed moving foot (28) on the opposite side of the convex portions (20, 21) Actuating pin, the guide member can be changed in a direction actuating member is moved in the apparatus body at least the finger (11) wires Gouqu region (12) of the thread. The wire finger of claim 1, wherein at least the guiding member (19), the cutting blade (22) and the clamping member (24) do not protrude beyond the side of the finger body (11), The sides of the finger body laterally form the sides of the at least one elongated slot (17, 18). A thread finger according to claim 1 or 2, wherein the cutting blade (22) and the clamping member (24) are disposed on opposite sides of the finger body (11). A thread finger according to claim 1 or 2, wherein the cutting blade (22) and the clamping member (24) are disposed on the same side of the finger body (11). A thread finger according to claim 1 or 2, wherein the cutting blade (22) and the clamping member (24) are held against the finger body (11) by a guide member (19) and It can be moved parallel to the finger body. A thread finger according to claim 1 or 2, wherein the guide member (19) and the holder member (24) are constructed as one piece. A thread finger according to claim 1, wherein the guide member (19) passes through the cutting blade (22) and the clamping member (24) with one of its two projections (20) and The cutting blade (22) and the end of the wire (20) of the clamping member (24) facing away from the finger body (11) are mounted on the second projection (21). A thread finger according to claim 7 wherein the spring (25) is constructed as a leaf spring and is held under tension between the two projections (20, 21) of the guide (19). . A thread finger according to claim 1 wherein one of the projections (21) is constructed such that it can be impacted by at least one displacement direction by the actuator of the wire changing device. A thread finger according to claim 1 or 2, wherein at least the finger body (11), the cutting blade (22), the clamping member (24), and The guide (19) is manufactured as a stamped sheet metal part. A wire changing device for a knitting machine, characterized in that it has a plurality of wire fingers (10) according to any one of claims 1 to 10, which are arranged in parallel with each other. A knitting machine characterized in that it has at least one thread changing device as in claim 11 of the patent application.