EP1988198A1 - Tool set and bar for a warp knitting machine - Google Patents

Abstract

The tool kit has one type of tools (4) e.g. needles, with a working part (6) e.g. hook, and a holding part (7), and another type of tools (5) e.g. sliders, with another working part (8) and another holding part (9). The tools are alternately arranged on a bar (1) of a knitter and are different from each other with respect to the configuration of the holding parts. The holding parts have a different height at a predefined axial position of the respective holding parts, where the axial position is different from base positions (19, 20).

Description

The invention relates to a tool set for equipping a bar of a knitting machine and a bar, which is adapted to receive tools, in particular the tool set according to the invention.

The bar of a knitting machine holds a large number of tools, such as needles, sliders and the like aligned parallel to each other at predetermined intervals resting on each other. When the bar is moved, all the tools perform the same movement. The tools are mounted at fixed distances from each other on the bar. The distances are usually determined by grooves which are incorporated parallel to each other in the bar and which receive the holding parts of the tools.

The measure of the division is the fineness. She is through given the number of tools per English inch. A fineness of E40 denotes 40 knitting tools per inch.

Very high subtleties can only be achieved with very slim tools. The webs, which limit the grooves for receiving the holding parts are also very thin. This leads with increasing fineness first to manufacturing difficulties and high production costs and to decreasing stability or robustness of both the tools and the bar in particular their webs.

It is an object of the invention to remedy this situation and to provide a robust solution for achieving high subtleties.

This object is achieved with the tool set according to claim 1 as well as with the bar according to claim 9 and / or 10:

The tool set according to the invention contains tools of at least a first type and a second type, which differ in the design of their holding parts. Thus, the tool set can be divided into at least two groups of tools, which are arranged alternately on the bar. The holding parts are used to attach the tools to the bar and set the position of the tools. In this case, the pitch ie the distance of the juxtaposed tools is determined from each other. The concept of the different design of the alternately arranged holding parts of the two different types of tools allows it to be provided for positioning and pitch fixing means outside the immediate spaces of adjacent holding parts. As a result, the entire bar length can be exploited and filled by the holding parts. The widths of the individual holding parts can be determined by dividing the bar length by the number of holding parts to be stored in total becomes. Between the individual holding parts neither partitions nor other means are required to effect the positioning of the tools. The positioning can be made at those portions of the holding parts with which the holding parts of the first and second types of tools differ from each other.

This concept allows the construction of ingots and tool sets that define an extremely fine pitch of significantly greater than E40. The tools are relatively robust, because their width to be measured on the holding parts can be at most equal to the pitch. The Barre does not require any structures whose width would be significantly less than the pitch itself. This also results in a robust bar that can be manufactured efficiently and accurately.

Preferably, the tools of the first and second types have mutually matching stitch forming areas, working parts. The working parts are for example hook, slider, slide slot, knife, eyelets or the like.

Preferably, the working parts of the tools have a width which is smaller than the width of the holding parts. The width is measured along the bar and thus transversely to the longitudinal direction of the tools and is defined by the distance of the side surfaces of the tools. By the tapering of the working parts of the tools relative to their holding parts, a distance is kept free between the holding parts of adjacent tools, even if the holding parts lie side by side against one another or delimit only extremely small gaps with one another.

But it is also possible to point the tools of a tool type of the tool set in a different direction leave as the tools of the other type. In this special case, the working parts can be at least as wide as the holding parts.

The holding parts of the tools of the at least two different types preferably differ in at least one predetermined axial position in their holding part height. The height of the holding part is measured perpendicular to the bar and at the same time perpendicular to the longitudinal direction of the tools. In other words, the holding part height is the distance between the upper and lower narrow sides of each holding part at the given location.

The different holding part height at the given axial position of the two different types of tools allows the design of a first embodiment in which e.g. only the tools of the first type are positioned on the bar via suitable positioning means. The positioning means may consist in grooves, slots or other recesses into which grip the holding parts with their greater height. The holding parts of the tools with lower holding part height can then be arranged between these positioned tools and are thereby automatically positioned. Thus, the tools of one type to a certain extent form the groove walls to form the grooves for receiving the holding parts of the tools of the other type.

But it is also possible to assign the holding parts of the tools of the two different types of the bar each own recesses, which are offset with respect to the longitudinal direction of the tools against each other. For example, the tools of the one type have a greater height at a front holding portion, while the holding portions of the tools of the second type have a greater height at a rear portion. At the barre are for the holding parts the tools of the first type, a first row of recesses and formed for receiving the holding parts of the tools of the second type, a second series of recesses. The two rows of recesses are then offset, for example, by the pitch in Barrenlängsrichtung against each other. The recesses may for example be grooves or slots. In addition, one row of recesses is located in a front area of the barre and the other row is in a rear area. Thus, the two rows are offset from each other in the tool longitudinal direction. By the measure described the tools of both types are positioned independently. They can touch each other on their holding parts, but they do not have to. This allows the definition of relatively generous production tolerances in terms of the thickness of the holding parts, the tolerances have little or no effect on the precision of the positioning of the individual tools and in any case do not sum up over the length of the bar.

The positioning of the tools in a direction perpendicular to the bar longitudinal direction and tool longitudinal direction (vertical direction) is typically effected by the bearing surface of the bar itself, in which the recesses are introduced. But it is also possible to have the example slot-shaped, oriented in the tool longitudinal direction recesses transverse, so to let cut in Barrenlängsrichtung of a positioning, which is deeper than the individual tool grooves. Such a positioning groove can also be arranged in a not provided with recesses or slots area of the bar. It serves to receive positioning projections, which are attached to the tools and serve to determine their height position. In this case, the tools are not resting against the contact surface, ie the upper side of the bar.

The axial positioning of the individual tools is preferably taken over by a separate foot, which projects into a groove provided for the barre. This foot is preferably identical to the holding parts of the tools of both types.

• Figur 1 eine Barre einer Wirkmaschine in schematisierter Draufsicht,
• Figur 2 die Barre nach Figur 1 geschnitten entlang der Linie 11-11 in Figur 1 in einer anderen Größendarstellung im Ausschnitt und stark schematisiert,
• Figur 2a die Barre nach Figur 1 geschnitten entlang der Linie II-II in Figur 1 in einer anderen Ausführungsform und Größendarstellung im Ausschnitt und stark schematisiert,
• Figur 2b die Barre nach Figur 1 geschnitten entlang der Linie 11-11 in Figur 1 in einer anderen Ausführungsform und Größendarstellung im Ausschnitt und stark schematisiert,
• Figur 3 die Barre nach Figur 1 mit einem Werkzeug eines ersten Typs und einem Werkzeug eines zweiten Typs zur Bestückung der Barre in schematisierter Explosionsdarstellung,
• Figur 4 eine abgewandelte Ausführungsform der Barre und der Werkzeuge in einer Darstellung entsprechend Figur 3,
• Figur 5 die Barre nach Figur 3 in einer schematisierten Querschnittsdarstellung,
• Figur 6 eine abgewandelte Ausführungsform einer Barre zur Aufnahme von einem Werkzeugsatz mit zwei unterschiedlichen Werkzeugtypen in Perspektivdarstellung und
• Figur 7 und 8 Seitenansichten von Werkzeugen unterschiedlichen Typs, die zu ein und demselben Werkzeugsatz gehören und für die Barre nach Figur 6 vorgesehen sind.

Further details of advantageous embodiments of the invention will become apparent from the drawings, the description or claims. The description is directed to essential details of the invention and other details. The drawings provide further details and supplement the description insofar. Show it:

• FIG. 1 a barre of a knitting machine in a schematic plan view,
• FIG. 2 the barre after FIG. 1 cut along the line 11-11 in FIG. 1 in a different size representation in the detail and highly schematized,
• FIG. 2a the barre after FIG. 1 cut along the line II-II in FIG. 1 in another embodiment and size representation in the section and highly schematic,
• FIG. 2b the barre after FIG. 1 cut along the line 11-11 in FIG. 1 in another embodiment and size representation in the section and highly schematic,
• FIG. 3 the barre after FIG. 1 with a tool of a first type and a tool of a second type for equipping the bar in a schematic exploded view,
• FIG. 4 a modified embodiment of the bar and the tools in a representation accordingly FIG. 3 .
• FIG. 5 the barre after FIG. 3 in a schematic cross-sectional representation,
• FIG. 6 a modified embodiment of a bar for receiving a tool set with two different types of tools in perspective view and
• FIGS. 7 and 8 Side views of tools of different types that belong to the same tool set and for the barre after FIG. 6 are provided.

In FIG. 1 a barre 1 is illustrated which belongs to a knitting machine. The bar holds a number of tools 2 arranged side by side along the longitudinal direction B of the bar. The tools 2 each have a longitudinal direction W, which is oriented transversely to the longitudinal direction B. The tools 2 are, for example, knitting tools in the form of knitting needles, sliders, hole needles, knives or the like. They are used to produce knitwear in textile production. The tools 2 constitute a tool set 3 comprising a number of tools 4 of a first type and a number of tools 5 of a second type, as is known FIG. 3 evident. The tools of the first type 4 each have a working part 6 and a holding part 7. The tools 5 of the second type each have a working part 8 and a holding part 9. The working parts 6, 8 preferably coincide with each other. Thus, a uniform font is formed on the bar 1. Assign the working parts 6, 8, for example, at their ends hooks 10, 11, these hooks are on a common line. However, the tools 4, 5 differ in the formation of their holding parts 7, 9. These each have a thickness which is to be measured between their side surfaces transverse to the tool longitudinal direction W. The thickness is only slightly smaller than the center distance of adjacent tools 4, 5. The thicknesses of the two working parts 7, 9 preferably correspond to one another. However, they differ in the present embodiment in their height, which is to be measured in the direction H between the respective narrow sides 12, 13, 14, 15 of the holding parts 7, 9. Like from the Figures 2 and 3 it can be seen, the tools 4 and their holding parts 7 are assigned to the bar 1 recesses 16 in the form of grooves. These recesses 16 cut through the upper support surface 17 of the bar 1 and are oriented transversely to the longitudinal direction B of the bar 1. Their width is substantially equal to the width of the holding parts 7 of the tools. 4 of the first type. Their depth corresponds to the height difference between the holding parts 7, 9 of the tools 4, 5. The distance between adjacent grooves or recesses 16 from each other corresponds to twice the pitch. The pitch is the center distance of adjacent tools 4, 5. While the holding parts 7 of the tools 4 rest on the bottom of the recess 16, the holding parts 9 of the tools 5 rest on the support surface 17. Their upper narrow sides 13, 15 lie in a common plane and are clamped by a terminal block 18 against the bar 1.

While the holding parts 7, 9 may differ in their height, they preferably coincide in their length with each other. They preferably each have at the same axial position a foot 19, 20, e.g. protrudes from the lower narrow side 12 and 14 away. It is associated with a longitudinal groove 21 in the bar, which extends parallel to the longitudinal direction B and transverse to the grooves 16. It serves for the axial positioning of the tools 4, 5.

The bar 1 is equipped with tools 2 of the tool set 3 by the tools 4 of the first type are inserted into the grooves 16. Their holding parts 7 now form between each other receiving spaces or slots for receiving the holding parts 9 of the tools 5 of the second type. Thus, the tools 4 are positioned by the grooves 16 in the longitudinal direction B according to a predetermined pitch and that in the double pitch. Thus, the recesses or grooves 16 cross-sections of the holding parts 7 together with the recesses 16 form a positioning means 22 for the tools 4 of the first type. The tools 5 of the second type are assigned no such positioning means. However, they find their position by passing with minimal play between the holding parts 7 of the adjacent tools 4.

The tools 4, 5 can support each other. Between you remain a barely noticeable slot or they lie without bias with their flat sides together. In the slot elastic or plastic elements or an elastic or plastic damping material can be provided. It can achieve divisions of E50 and finer. The tools 2 remain robust. They make use of the maximum available thickness, in particular in the area of their holding parts 7, 9. The working parts 6, 8 of all tools 4, 5 may be oriented parallel to each other. Their thickness may be slightly less than that of the holding parts 7, 9.

In the presented embodiment modifications are possible. For example, the grooves or recesses 16 need not necessarily have the same width as the working parts 7. Rather, it is also possible to make the grooves or recesses 16 narrower and the corresponding provided for engaging in the recess 16 portion of the holding part 7 also in accordance with to reduce its thickness. It thus becomes a centric or eccentric longitudinal rib, which forms the required positioning means 22 together with the groove. It is also possible to provide instead of the groove 16 a towering from the support surface 17, narrow, eg web-like projection having a substantially smaller width than the holding part 7 of the tool 4. This projection can engage in a longitudinal groove of the holding part 7, the is provided on the lower narrow side 12. Again, then provided on the bar 1 projection, which engages in the longitudinal slot of the holding part 7, the desired positioning means 22. It is also possible to form this projection or rib by a thin plate or bar, which in a barre in addition to this trained groove is inserted. Also in this embodiment, in turn, the basic principle is realized, according to which the positioning means only on each second holding part. 7 engages and the intermediate holding parts 9 are positioned by the holding parts 7. The underlying basic principle is in turn the different design of the holding parts 7, 9 of the two types of tools.

It is also a modification according to FIG. 2a possible. Here, the positioning means 22 for the holding part 7 is formed by a recess (groove) 12a, in which a bar or a web 22a is seated. This engages in a recess of the holding part 7. The holding part 9 is without a recess and is positioned by the adjacent holding parts 7. There may be gaps between the adjacent holding parts 7, 9. The web 22 a may be integrally connected to the bar 1 or the holding part 7 of the needle 4.

FIG. 4 illustrates another embodiment of the invention. In this takes place the positioning of the tools 4, 5 of the tool set 3, as described above. Reference is therefore made to the previous description based on the same reference numerals. However, the tools 4, 5 find their way FIG. 4 With their narrow sides 12, 14 no contact with the bar 1. Rather, suitable projections, for example in the form of feet 23, 24, 25, 26 are provided which engage in longitudinal grooves 27, 28 of the bar 1. The longitudinal grooves 27, 28 extend parallel to the longitudinal direction B and thus transversely to the recesses or grooves 16. The longitudinal grooves 27, 28 can cut through the recesses 16 or run through ungrooved regions of the support surface 17.

The length of the feet 23 to 26 is sized to determine the height position of the tools 2. This is especially the case FIG. 5 out. This illustrates the facts with reference to the tool 5, the narrow side 14 is arranged at a small distance above the support surface 17. The feet 25, 26 lie with their front sides on the bottoms of the Longitudinal grooves 27, 28 at. The same applies to the tools 4 of the first type.

Another modified embodiment of the invention illustrate the FIGS. 6 to 8 in their entirety. In this embodiment, both the in FIG. 7 illustrated tool 4a of the first type as well as the tool 5a of the second type associated with positioning. Accordingly, the bar 1 'positioning means for both types of tools 4a, 5a of the tool set 3. The positioning means are formed by the bar 1 'by grooves 16-4, 16-5 or other suitable recesses. The grooves 16-4 form a first group of positioning means which cooperate with portions 29 of the holding parts 7a of the tools 4a of the first type. Between the grooves 16-4 web walls are formed, the upper narrow sides form part of the support surface 17-5. The narrow sides 14a of the tools 5a find their abutment on them.

The grooves 16-4 are spaced at twice the pitch. The slit walls delimiting them have a thickness which substantially coincides with the thickness of the holding part 9a.

The holding part 9a of the tool 5a has a small height in a portion near its foot 19, which is to be measured in the direction H perpendicular to the longitudinal direction W. At a corresponding same axial position near the foot 20, the holding part 7a of the tool 4a has a comparatively greater height. The height difference between the two holding parts 7a, 9a preferably corresponds to the depth of the groove 16-4.

In one of the feet 19, 20 distant portion of the holding part 7a, 9a each adjacent to the working part 6a, 8a, the holding parts 7a, 9a also have different heights. The holding part 9a is here provided with a portion 30 which is adapted to engage in the grooves 16-5. These are offset from the grooves 16-4 by one pitch, ie a little more than a thickness of the holding part 7a and / or 9a. In this case, the web walls, which delimit the grooves 16-5 from each other, preferably aligned with the grooves 16-4. The upper narrow sides of the web walls delimiting the grooves 16-5 lie in a common plane and form a bearing surface 17-4. This support surface 17-4 is preferably with the support surface 17-5 in a plane. It serves to support the narrow sides 12a of the tools 4a.

The grooves 16-5 may be formed in or on a separate part 31 of the bar 1 ', which is inserted into a wide flat longitudinal groove of the bar 1' and positioned there as desired. Otherwise, the previous description applies accordingly. In particular, it is possible to position the feet 19, 20 separately in the FIG. 6 not further illustrated recesses to provide, for example, a longitudinal groove. Furthermore, grooves corresponding to the longitudinal grooves 27, 28 and feet provided for supporting the tools 4a, 5a corresponding to the feet 23 to 26 may be provided to position the tools 4a, 5a in their height. Furthermore, the combination with features of the previous embodiments is possible. For example, the grooves 16-5 may be omitted if the tools 5a have a consistently low land height corresponding to the tools 5. They are then positioned by the tools 4. Conversely, the grooves 16-4 can be omitted, the tools 4a are then positioned by the tools 5a.

It is expressly considered any technically meaningful combination of the features of the described embodiments as an embodiment of the invention, if they are in Protection of the following claims.

To simplify the construction of a bar and the associated tools of a knitting machine and to improve the precision increase the fineness and increase the robustness of the system formed from the tools and the bar is provided to form the holding parts 7, 9 of the tools 4, 5 of the tool set 2 different , This opens up the possibility of providing at the holding parts 7 at least one tool type means 22 for positioning the tools 4 on the bar and thus determining the division. The other tools 5 may be assigned their own positioning means for positioning and fixing the division. Alternatively, they may be positioned by the tools 4 of the first type between which they are received.

Another variation of the invention is illustrated FIG. 2b , The embodiment is based on the embodiment according to FIG. 2a However, the tools 2 may be the same. In particular, the holding parts 7 ', 9' may be identical to each other. The above description applies in particular to FIG. 2a accordingly for FIG. 2b , Notwithstanding the above description, it is possible to dispense with gaps between the holding parts 7 ', 9'. The flanks, which limit the slot in each of the holding parts 7 ', 9', can slightly spring. The webs 12a can be slightly wedge-shaped and taper upwards. If the holding parts 7 ', 9' are pressed onto the webs 22a, the flanks of each holding part 7 'can spread apart a little from one another and thereby clamp the flanks of the holding part 9'. By the holding parts 7 'in the transverse direction (ie ingot longitudinal direction B) slightly widened and the holding parts 9' are slightly compressed in the transverse direction, a secure backlash-free positioning results. The deformations are preferably in the resilient or elastic region.

If grooves are provided for positioning in the bar or in parts of the bar, these grooves can be set at twice the pitch, which results in robust and mechanically stable solutions, which can be produced with high precision, in particular with fine pitches.

LIST OF REFERENCE NUMBERS

1, 1 '

bar

2

Tools

B, W

longitudinal directions

3

tool kit

4, 4a

Tools of the first type

5, 5a

Tools of the second type

6

Working part of the first tool type

7, 7a

Holding part of the first tool type

8th

Working part of the second tool type

9

Holding part of the second tool type

10, 11

hook

12 - 15

narrow sides

16, 16-4, 16-5

recesses

17, 17a, 17b

bearing surface

18

terminal block

19, 20

feet

21

longitudinal groove

22

positioning means

22a

web

23-26

feet

27, 28

longitudinal grooves

29, 30

section

31

part

Claims (11)

Tool set (3) for equipping a bar (1) of a knitting machine,
with tools (4) of a first type, which have a working part (6) and a holding part (7) and
with tools (5) of a second type, which have a working part (8) and a holding part (9),
wherein the tools (4, 5) are to be arranged alternately on the bar (1) and differ in the construction of their holding parts (7, 9). Tool set according to claim 1, characterized in that the tools (4) of the first type and the tools (5) of the second type identically formed working parts (6, 8). Tool set according to claim 1, characterized in that the working parts (6, 8) of the tools (4, 5) of the first and / or the second type have widths which are smaller than the widths of the holding parts (7, 9) of the tools ( 4, 5) of the first and / or second type. Tool set according to claim 1, characterized in that the holding parts (7) of the tools (4) of the first type and the holding parts (9) of the tools (5) of the second type at at least one predetermined axial position (A) of their respective holding part (7, 9) have a different holding part height. Tool set according to claim 1, characterized in that at least the holding parts (7, 9) of the tool (4, 5) of one of the two types is associated with a positioning means (22) which cooperates with the bar (1) to set the position of the tool (4, 5) in its transverse direction (B) relative to the bar (1), the Transverse direction (B) is directed longitudinally of the bar (1). Tool set according to claim 5, characterized in that the positioning means (22) in a recess (16) of the bar (1) cross-section of the holding part (7) of the tool (4). Tool set according to claim 5, characterized in that the positioning means (22) is a projection (22a) of the bar (1) receiving recess of the tool. Tool set according to claim 1 or 6, characterized in that holding parts (9) of the tools (5) of one type each between two holding parts (7) of tools (4) of the other type are arranged and positioned by them in their transverse direction. Tool set according to claim 1, characterized in that the tools (4, 5) are provided on their holding parts (7, 9) with projections (23, 24, 25, 26) for positioning in a direction (H), this direction ( H) is perpendicular to both the tool longitudinal direction (W) and to the bar longitudinal direction (B). Bar (1) for holding tools (4, 5), in particular tools (4, 5) of the tool set (3) according to at least one of the preceding claims, characterized in that the bar (1) positioning means (16) only for one Group of tools (4). Bar (1, 1 ') for receiving tools (4a, 5a), in particular tools of the tool set (3) according to at least one of the preceding claims, characterized in that the bar (1, 1') positioning means (16a, 16b) for tools (4a, 5a) of both types, wherein the positioning means (16a) of the tools (4a) of the first type are offset in the tool longitudinal direction (W) against the positioning means (16b) of the tools (5a) of the other type.

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