WO1995000690A1

WO1995000690A1 - Device for clamping and guiding hook needles for crochetting machines

Info

Publication number: WO1995000690A1
Application number: PCT/EP1994/001898
Authority: WO
Inventors: Johann Berger; Fritz Schülein
Original assignee: Berger Gmbh
Priority date: 1993-06-24
Filing date: 1994-06-10
Publication date: 1995-01-05
Also published as: DE4321059A1; AU7123394A; MX9404772A

Abstract

A device for clamping and guiding hook needles for crochetting machines has plate-like clamping parts which may be pressed against each other for receiving sections of the shafts of the needles (24, 26, etc.). This clamping device has a machine-fixed evener comb with protruding teeth for guiding the needle shafts. In order to obtain a pitch higher than 12 per cm of the machine width, two separate sets of needle-receiving holes are provided in the clamping device for two sets of needles. The sets of needle-receiving holes are mutually offset by half a pitch in the longitudinal direction of a needle bar. The hook needles (26, etc.) of at least one set are bent or curved in such a way that the head-bearing front ends (5v, 10v) of both sets of needles which protrude out of the clamping device are mutually aligned.

Description

Device for clamping and guiding crochet hooks for a crochet machine

The invention relates to a device for clamping and guiding crochet hooks, in particular latch, point or patent needles for a crochet machine, in particular a crochet galloon machine. The device has the further features mentioned in the preamble of claim 1.

The invention is based on a device of this type, as described in WO 93/06 288 (Berger). In the first paragraph of the description of this document, two further Berger publications are listed as state of the art.

The present invention is intended to enable a very fine division of the crochet hooks, namely more than twelve per centimeter of machine width. This is done in accordance with the features in the characterizing part of claim 1. According to the invention, two sets of crochet hooks are used, which are clamped using two separate sets of needle holders, the one set of needle holders in the longitudinal direction being one the clamping device carrying the needle bar is offset by half a pitch from the other. The front parts of the needles, which protrude from the clamping device and which carry the heads, must now be arranged in such a way that they are aligned with one another, that is to say because their longitudinal axes lie in a common plane. This is achieved in that the crochet hooks of at least one set are angled or curved accordingly.

So does each of the sets of needle holders have a division of e.g. 8 per centimeter, there is a division of 16 per centimeter for the front ends.

Training

the invention emerge from the subclaims. According to claim 2, two separate two-part clamping devices can be provided. Then the shafts of the two sets of needles are angled twice in the opposite sense, for example two times by ninety degrees or two times by eighty degrees or the like. One can also proceed in such a way that the needles of one set run straight out, for which commercially available needles can be used, and only bend those of the other set twice.

The arrangement can be simplified in such a way that, according to claim 3, a three-part clamping device is used, which therefore has only three plate-like clamping parts, one set of needles each being clamped between the upper and the middle clamping part and the second set between the middle and the lower clamping part. Again, either two sets of needles can be angled or only one. In any case, the front ends of both sets of needles should be aligned.

In order to hold the front ends of the needles as securely as possible in the clamping device and, above all, to secure them against pivoting in a transverse plane, at least one of the clamping parts can have needle receptacles for the angled (perpendicular) sections of the needles in the front end.

If a three-part clamping device is used, its central part can be wedge-shaped and taper towards the exit side of the needles to be clamped. One set of the needles can then be straight, so normal needles can be used, while the other set is angled at an obtuse angle, but this is easy to do with commercially available needles.

So that one has access to the clamped needles in order to be able to exchange some of them, the uppermost clamping part of the clamping device can be divided into several sections, each of which covers only some of the needles. Exemplary embodiments with further features of the invention are described below with reference to the drawings.

Fig. 1 relates to a first embodiment of the invention and is a cross section through a jig along lines I-I in Fig. 2, i.e. by means of an upper section which runs immediately in front of an upper crochet hook, is displaced forward by half a division in the middle and likewise runs directly in front of a crochet hook in the lower section.

FIG. 2 is a front view of part of the jig of FIG. 1.

3 and 4 show a corresponding cross section and a partial front view of a second embodiment of the invention.

5 and 7 show a corresponding cross section and a partial front view of a third embodiment of the invention.

6 shows a side view of one of the upper crochet hooks provided according to FIG. 5.

8 to 11 show different cross sections of needle receptacles for the second embodiment. According to FIGS. 8 to 10, needle receptacles in rectangular shape, V shape and U shape are only milled into the lower two adjacent clamping parts. According to FIG. 11, needle receptacles in a V-shape are milled into all three clamping parts.

First embodiment

The clamping device (needle bed) according to FIG. 1 has two plate-like clamping parts 2, 3 for an upper set of needles 5 and plate-like clamping parts 7, 8 for a lower set of needles 10. The rear parts of the shafts of the needles 5 and 10 can be clamped in, as shown in detail in the European patent application with the publication number 0 165 461 in FIGS. 1 and 2. In this respect, the drawings here are only provisional representations. It is essential that the needle receptacles of the two upper clamping parts 2 and 3 compared to the needle receptacles in the two lower clamping parts 7 and 8 are offset from each other, exactly by half a division. The divisions above and below are the same. If a division of eight is provided at the top and bottom, there is a total of a division of six, i.e. twice the fineness.

The needles 5 and 10 have two right angles in their course, the arrangement being such that the recognizable front end lOv of one of the needles 10 with the front ends 5v of the needles 5 shown in FIG. 1 and the front ends of the other needles 10 shown hidden aligned, that is, the axes of all front ends lie in a common plane.

Access to smaller groups of needles 5 and 10 is obtained by dividing the upper clamping part 2, 7 into individual sections 2 2a and 7, 7a etc. Individual sections 2a, 7a can be removed after loosening screw bolts 11. The front sides of the clamping parts 3 and 7 have millings on the front (on the right in FIG. 1) for receiving the short angled sections 5a and 10a of the needles 5 and 10, respectively.

Second embodiment

As shown in FIGS. 3 and 4, only three clamping parts 12, 13 and 14 are provided in this embodiment. Here only the upper needles 16 are angled twice, while the lower needles 18 are straight, that is to say they can be normal commercially available needles. Again, it is ensured that the front ends of both needle groups are aligned. The needle receptacles between the clamping parts 12 and 13 are in turn offset by half a pitch compared to those between the clamping parts 13 and 14, so that there is an overall division of double fineness. Again, the upper clamping parts are divided (12 and 12a) so that only a small group of needles need be exposed to change individual needles, while the others remain clamped. The straight needles 18 can be pulled out backwards to change (to the left in FIG. 3).

The middle clamping parts 13 also have millings for the angled parts 16a of the needles 16 on their front side (on the right in FIG. 3). In this embodiment, the. Figures 8 to 10 different forms of needle recordings. FIG. 8 shows rectangular needle receptacles, which are only milled into the clamping parts 13 and 14 from above, while the opposite lower surfaces of the clamping parts 12 and 13 are flat. A more detailed description can be found in the publication EP AI 0 165 461, FIGS. 1 and 2.

FIG. 9 shows the same arrangement of needle receptacles, but their cross sections are V-shaped. Figure 10 shows the same arrangement as Figures 8 and 9 U-shaped needle receptacles.

According to FIG. 11, on the other hand, V-shaped needle receptacles are provided in the two mutually facing sides of the clamping parts 12, 13 and 14. A more precise representation can be found in WO 93/06 288, FIG. 3, needle 10.

Third embodiment

While in the first two embodiments all clamping parts have mutually parallel upper and lower surfaces, in the embodiment according to FIGS. 5 to 7 the middle clamping part 21 has a wedge shape. The upper clamping part 20 and the lower clamping part 22 have mutually parallel upper and lower surfaces. The clamping part 20 is chamfered on its right side. All clamping parts have the same cross sections from front to back in FIG. 5 or from left to right in FIG. 7.

The lower needles 24 are straight, that is, commercially available needles. The upper needles 26 are bent at an obtuse angle, as shown in FIG. 6, or bent. So they can easily be made from commercially available needles.

The lower clamping part 22 can be of a conventional type. The wedge shape of the central clamping part 21 means that there is no milling on its end face. The upper clamping part is again divided into sections 20 and 20a for changing the needles. The following applies to all three embodiments:

The needles can also have slight curvatures instead of angles.

The front ends of the needles are guided in a tapping comb, in particular according to FIGS. 5 and 6 of document WO 93/06 288.

REFERENCES

2, 2a, 3 clamping part

5 Upper needle

5a angled section

5v front end

7, 7a, 8 clamping part

10 Lower needle

10a angled section lOv front end

11 bolts 12, 12a, clamping part 13, 14 clamping part 16, 18 needle

16a angled section

20, 20a clamping part

21, 22 clamping part

24 Lower needle

26 Upper needle

Claims

PATENT CLAIMS

Device (clamping device) for clamping and guiding crochet needles (needles), in particular tongue, point or patent needles, for a crochet machine, in particular a crochet galloon machine (a), the clamping device pressing plate-like clamping parts against one another for receiving sections the shafts of the needles (5, 10, 16, 18, 24, 26). b) and with a machine-fixed knock-off comb with projecting tines for guiding the needle shafts, characterized in that two separate sets of needle holders are provided for two sets of needles in the clamping device in order to achieve a division of more than 12 per cm of machine width. d) that the sets of needle receptacles are arranged offset in the longitudinal direction of a needle bar carrying the clamping device by half a pitch. e) that the crochet hooks (5, 10, 16, 26) of at least one set are angled or curved in such a way that the front ends (5v, 10v) of the two sets of needles protruding from the clamping device and carrying the heads are aligned .

Apparatus according to claim 1, characterized in that a) that two sets of needle receptacles are accommodated in two separate, two-part clamping devices b) and that the needle shafts are angled twice in the opposite sense. (Fig. 1,

2)

Apparatus according to claim 1, characterized in that a) that the two sets of upper and lower needle receptacles are accommodated in a three-part clamping device, and b) that the shafts of at least one set of needles are angled twice in opposite directions. (Fig. 3, 4) 4. The device according to claim 1, characterized in that the one set of needles is straight and only the other is bent or bent twice in the opposite sense. (Fig.

3,

4)

5. Device according to one of the preceding claims, characterized in that the angled portions of the needles facing the front end min¬ least one clamping part of the clamping device has needle holders for the angled portions. (Fig. 1-4)

6. The device according to claim 1, characterized in that a) that the two sets of upper and lower needle receptacles are accommodated in a three-part clamping device, b) that the central clamping part (21) of the clamping device is wedge-shaped and tapers towards the exit side of the needles to be clamped, c) that the shafts of one, in particular the upper set of needles (26) are angled at an obtuse angle and d) that the shafts of the other set of needles (24) are straight. (Fig. 5-7)

7. Device according to one of the preceding claims, characterized in that the uppermost clamping part of the clamping device is divided into several sections (2, 2a, 7, 7a etc.), such that each section covers only some of the needles.

8. Device according to one of the preceding claims, characterized in that a) that of two adjacent Klemmtcilen only one of the needle holders ent¬ b) that the needle holders have a lower height than the shafts of the needles and c) that the other of the two clamping parts has a flat pressure surface. (Fig. 8-10)

9. The device according to claim 8, characterized in that the cross sections of the needle receptacles have a rectangular, V or U shape.

10. Device according to one of claims 1 to 7, characterized in that a) that of two adjacent clamping parts both contain opposite del del Recordings b) and that the needle receptacles have less than half the height of the shafts of the needles.

11. The device according to claim 10, characterized in that the needle receptacles have a V-shape in both clamping parts. (Fig. 11)