CN113699676B

CN113699676B - Knitting element bar assembly of warp knitting machine

Info

Publication number: CN113699676B
Application number: CN202010679403.9A
Authority: CN
Inventors: K·布兰德尔
Original assignee: Carlmeyerstol R & D Co ltd
Current assignee: Carlmeyerstol R & D Co ltd
Priority date: 2020-05-20
Filing date: 2020-07-15
Publication date: 2023-12-01
Anticipated expiration: 2040-07-15
Also published as: EP3683343B1; TW202202682A; EP3683343A3; EP3683343A2; CN113699676A; KR20210143665A; KR102572235B1; TWI791213B; ES2922225T3

Abstract

The invention relates to a knitting element bar assembly (1) of a warp knitting machine, comprising a bar (2) and a plurality of knitting element units (3), wherein each knitting element unit comprises a plurality of knitting elements (4), wherein the knitting element units (3) are attached to the bar (2) with a bar attachment surface and are detachably fastened to the bar (2). It is desirable to simply design the maintenance and servicing of such a knit element bar assembly. For this purpose, at least one knitting element unit (3) has a recess (6) which is open to one side and in which a clamping element (10) which is connected to the guide bar (2) is arranged and acts on the knitting element unit (3) from the side opposite the guide bar abutment surface.

Description

Knitting element bar assembly of warp knitting machine

Technical Field

The invention relates to a knitting element bar assembly of a warp knitting machine, comprising a bar and a plurality of knitting element units, wherein each knitting element unit comprises a plurality of knitting elements, wherein the knitting element units rest on the bar with a bar contact surface and are detachably fastened to the bar.

Background

In order to fix the knitting elements at the bar of the warp knitting machine, basically two possibilities exist. One possibility is to provide a braiding element receptacle at the bar, for example in the form of a groove or slit which is oriented perpendicularly to the longitudinal extension of the bar. The braiding elements are individually inserted into the slots or slits and then secured with a cover or the like and prevented from falling out.

Another possibility consists in integrating a plurality of braiding elements in a so-called braiding element unit (wirkelementfassutung). Typically, the braiding elements are injected into the braiding element unit. In this case, the braiding element unit is made of lead or other metals or also of plastics or a combination of these. The knit element unit typically has a width of 1 or 2 inches and correspondingly has a plurality of knit elements.

The invention relates to the last-mentioned possible solution.

When the braiding element unit is fitted at the guide bar, the threaded fastener is guided through a hole in the braiding element unit and then screwed into the guide bar.

However, the knitting elements are wear parts of the warp knitting machine, which wear parts have to be replaced from time to time. For replacement, the threaded fastener must then be disengaged again. The threaded fastener must be pulled out of the knit element unit (sometimes also translated as unscrewed) and inserted into a new knit element unit. The threaded fastener must then be screwed into the bar. The method of operation is not merely consumable. Since the guide bar often has a length of several meters and a correspondingly large number of knitting element units, it happens many times that the threaded fastener falls off and has to be found. The risk of the threaded fastener falling into the warp knitting machine and causing considerable damage in operation here is too great. Accordingly, the replacement of the braiding element unit is time-consuming and requires trained and skilled personnel.

Disclosure of Invention

The invention is based on the task of simply designing the maintenance and servicing of the knitting element bar assembly of a warp knitting machine.

The object is achieved in the case of a knitting element bar assembly of the type mentioned at the beginning in that at least one knitting element unit has a recess open to one side, in which recess a clamping element connected to the bar is arranged, which clamping element acts on the knitting element unit from the side opposite the bar abutment surface.

With this configuration, replacement of the knitting element unit is relatively simple and is less prone to errors. The clamping element must be disengaged, which however can continue to remain connected to the guide bar. After the gripping element is disengaged, the braiding element unit can be pulled out. The knitting element unit can be slid with its bar abutment surface on the corresponding counter-surface of the bar on a small path. Once the knitting element unit has left the knitting area of the gripping element, the knitting element unit is released by the bar and can be removed. The loading of new knitting element units takes place in the reverse order. The knitting element unit is brought to bear with its bar abutment face against the bar and pushed with the open recess to the gripping element, so that the gripping element is then in the recess. The clamping element can then again be tensioned and the braiding element unit can be reliably fixed at the guide bar. The only component that has to be separated from the bar is the knitting element unit. Accordingly, no further components can be lost.

Preferably, the recess is arranged on a side of the braiding element unit facing away from the braiding element. The knitting element unit can then be removed transversely to the longitudinal extension of the guide bar and again assembled in the opposite direction, that is to say also transversely to the longitudinal extension of the guide bar. In this way, it is possible to replace individual braiding element units without having to remove adjacent braiding element units as well.

Preferably, the recess is laterally bounded by two feet and the clamping element acts on the feet. In other words, the recess is U-shaped. The clamping element is then arranged in the middle of the U and acts only or at least also on the foot. This has the advantage that the risk of foot distraction can be kept small. In the case of a foot bifurcation, the braiding element units may deform, which can negatively affect the positioning of the braiding elements relative to each other.

Preferably, a torsion-resistant intermediate piece which acts on the braiding element unit in a planar manner is arranged between the clamping element and the braiding element unit. By virtue of the planar application of the intermediate piece of the braiding element unit (which intermediate piece can be configured, for example, simply as a plate), the clamping force can be distributed planarly onto the braiding element. By means of the torsion resistance, a defined position of the intermediate piece relative to the braiding element unit is always ensured. Both of which help to counteract deformation of the knit element unit. The risk of having to orient the braiding element again after assembly of the braiding element unit is correspondingly kept small.

It is also advantageous if the intermediate piece has a tab assembly which is oriented in the direction towards the bar and counteracts the bifurcation of the foot. The tab assembly is for example on the outside of the foot so that when the feet are to diverge, the foot will come to rest against the tab assembly. The intermediate piece, that is to say, forms a kind of locking part.

In this case, it is advantageous if the braiding element unit has a mating geometry which cooperates with the projection assembly. For example, the tab assembly can be configured triangularly in cross-section. The braiding element unit then has a section at the foot in a correspondingly inclined manner.

Advantageously, the spring assembly acts on the intermediate piece in a direction away from the bar. The spring assembly is responsible for keeping the intermediate piece in the spacing relative to the bar, which is necessary in order to assemble a new knitting element unit. This facilitates assembly. After the disassembly of the braiding element unit, a free space remains available into which a new braiding element unit can be pushed.

Preferably, the spring assembly has an O-ring surrounding the clamping element. An O-ring made of elastomer is a cost-effective structural element that can be slightly pressed together when the clamping element is tensioned. The O-ring has a thickness or height that is slightly greater than the thickness of the woven element assembly.

Preferably, the guide bar has a stop for the knitting element unit. This has two advantages. The position of the braiding element unit transversely to the longitudinal extension of the guide bar is defined on the one hand, and the stop forms a torsion-resistant part which prevents the braiding element unit from twisting when the clamping element is tensioned or during operation on the other hand.

Advantageously, the clamping element is configured as a threaded fastener or a bolt. To disengage the clamping element, it is sufficient to turn the threaded fastener or the bolt, for example, in one rotation. Thereby, the clamping force is reduced to such an extent that the knitting element unit can be removed from the bar. In order to fix the braiding element unit, only one corresponding rotation of the threaded fastener or bolt in the opposite direction is then necessary. That is, replacement of the knitting element unit can be performed with less consumption.

Preferably, the guide bar has a base body and a carrier element assembly extending in the longitudinal direction of the base body, wherein the clamping mechanism is arranged at the carrier element assembly and the carrier element assembly is detachably fastened at the base body. This configuration is particularly advantageous in the case of a complete exchange of all braiding element units. The braiding element unit can be fitted at the carrier element assembly as long as the carrier element assembly is not yet fixed at the base body. The carrier element assembly can also be mechanically equipped, for example, and if necessary, the orientation of the braiding elements can also be carried out automatically or under machine control. The carrier element assembly can then be fixed at the base body. At the warp knitting machine itself, where there is usually only a small amount of space for the operator, then only a small number of operations (Handgriffe) are necessary. The fastening of the carrier element assembly at the base body can take place, for example, by means of threaded fasteners or the like.

Advantageously, the carrier element assembly has a plurality of carrier elements which are arranged adjacent to one another in the longitudinal direction of the bar. Such carrier elements can, for example, have a length of 21 inches (53.34 cm). Carrier elements having such a length can be handled well and can be positioned relative to the base body. The graduation difference (Teilungsdifferenzen) can thereby be compensated for over the entire width of the guide bar.

Drawings

In the following, the invention is described according to preferred embodiments in connection with the accompanying drawings. Wherein:

figure 1 shows a very schematic view of a knitting element unit at a bar,

figure 2 shows from one side a bar with a knitting element unit,

FIG. 3 shows middleware, and

FIG. 4 shows a modified embodiment of the bar assembly.

Detailed Description

Fig. 1 schematically shows a knitting element bar assembly 1 of a warp knitting machine. The bar assembly 1 has a bar 2 and a plurality of knitting element units 3. Each braiding element unit 3 has a plurality of braiding elements 4, which in the present case can be configured as laying needles (Legenadeln). The knitting element unit 3 has a bar abutment surface 5 with which it abuts against the bar 3. As will be described further below, each knitting element unit 3 is releasably secured to the bar 2.

In fig. 1 three braiding element units 3 are shown. The right braiding element unit 3 merely rests against the guide bar 2 and is not already fixed there.

It can be seen that the braiding element unit 3 has a recess 6 which opens towards the edge of the braiding element unit 3, that is to say at the side of the braiding element unit 3 facing away from the braiding element 4.

The recess 6 is laterally delimited by two feet 7, 8, so that said recess essentially has the shape of a "U". However, the bottom of the "U" need not be curved. The "U" can also have an approximately rectangular shape.

The bar 2 has a threaded bore 9 into which a threaded fastener 10 (fig. 2) or a corresponding bolt can be screwed. Because the knitting element unit 3 has an open recess 6, the knitting element unit 3 can also be fitted at the bar 2 when the threaded fastener 10 has been screwed into the bar 2.

The knitting element unit 3 shown on the right in fig. 1 is not yet fixed at the bar 2.

In order to facilitate the fixation, an intermediate piece 11 is provided, which can also be called a "clamping plate" and acts planarly on the braiding element unit 3. The intermediate piece 11 also covers the feet 7, 8. The intermediate piece 11 is torsion-resistant. The intermediate piece can act on the braiding element unit 3 in only one or a few rotational angular positions. This ensures that a predetermined tension distribution is always achieved on the braiding element unit 3.

When the above-mentioned threaded fastener 10 is screwed into the bar 2, the knitting element unit 3 is finally fixed at the bar 2, see the knitting element unit on the left.

Fig. 3 shows a modified shape of the intermediate piece 11. The intermediate piece 11 has a projection assembly with two projections 12, 13 which, when the intermediate piece 11 is laid flat on the weaving element unit 3, externally enclose the two feet 7, 8. In this case, the feet 7, 8 have correspondingly configured outer sides which cooperate with the inclined inner sides of the projections 12, 13. The projections 12, 13 prevent the feet 7, 8 from being able to diverge when the intermediate piece 11 is, that is, tensioned to the braiding element unit 3 by the threaded fastener 10. This may lead to undesired deformation of the braiding element unit 3.

The protruding portions 12, 13 may be provided not to act on the outer sides of the legs 7, 8, but with corresponding deepened portions in the legs 7, 8 into which the protruding portions 12, 13 can enter. In this case, the intermediate member 11 does not have to have a larger width than the knitting element unit 3.

The threaded fastener 10 is surrounded by an O-ring 14. The O-ring 14 has a thickness which in the relaxed state is slightly greater than the thickness of the braiding element unit 3. The O-ring 14 forms a spring assembly that squeezes the intermediate piece 11 away from the bar 2 when the threaded fastener 10 is slightly disengaged.

The guide bar 2 has a stop 15, against which the feet 7, 8 of the knitting element unit 3 can rest when the knitting element unit 3 is mounted on the guide bar 2. The stop 15 thus forms a positioning aid. The stop also forms a torsion-resistant part, so that the braiding element unit 3 can be mounted on the guide bar 2 in a predetermined orientation, wherein the orientation does not change even when the threaded fastener 10 is screwed down.

For the replacement of the braiding element unit 3, the following steps are now necessary. First, the threaded fastener 10 must be disengaged slightly. For this purpose, usually one rotation is sufficient. That is, the threaded fastener 10 can stay in the bar 2. Thereby, the threaded fastener can be kept from being lost.

Once the threaded fastener 10 is disengaged to such an extent that the intermediate piece 11 no longer presses the knitting element unit 3 against the bar 2, the knitting element unit 3 can be removed from the bar 2 in the direction of the double arrow 16. The direction of the double arrow 16 runs approximately perpendicular to the longitudinal extension of the guide bar 2. The intermediate piece 11 is held in a distance from the guide bar 2, since the O-ring 14 prevents the intermediate piece 11 from approaching the guide bar 2.

The new or modified knitting element unit 3 can then be pushed into the intermediate space between the intermediate piece 11 and the guide bar 2, which is kept open by the O-ring 14, that is to say so far into the intermediate space that the knitting element unit 3 comes to rest against the stop 15. Thereafter, only the threaded fastener 10 must be tightened again, wherein only one rotation is necessary in order to create the necessary clamping force. Thus, the threaded fastener 10 forms a clamping element. Other clamping elements are possible, such as tensioning rods or the like.

Fig. 4 shows a modified embodiment of the guide bar 2. The guide bar 2 has a base body 17, to which a plurality of carrier elements 18 are fastened. The carrier elements are arranged in succession in the longitudinal direction of the bar 2, with respect to the illustration of fig. 4 (that is to say the vertical drawing plane). The carrier element can be fastened to the base body 17 in an assembled and detachable manner. The carrier element has a length of, for example, 21 inches (i.e., 53.34 cm). This length can also be handled well and can be fixed at the base 17 with the desired accuracy.

The carrier element can be already equipped with the braiding element unit 3 in advance and the braiding element 4 can already be oriented. This can also be done mechanically, since the orientation does not have to be carried out at the warp knitting machine 1, but at a position where there is sufficient space for handling.

The threaded fastener 10 and the intermediate piece 11 are then fixed at the carrier element 18.

The carrier element 18 can be replaced entirely when replacement of the braiding element according to a cycle is necessary. When only one single braiding element unit fails and has to be replaced, the threaded fastener 10 can be disengaged and the corresponding braiding element unit 3 removed.

The fixing of the carrier element 18 at the base body 17 is not shown in more detail. The fixing can be performed, for example, by threaded fasteners.

Claims

1. Knitting element bar assembly (1) of a warp knitting machine, having a bar (2) and a plurality of knitting element units (3), wherein each knitting element unit has a plurality of knitting elements (4), wherein the knitting element units (3) rest with a bar abutment surface (5) against the bar (2) and are releasably fastened to the bar (2), wherein at least one knitting element unit (3) has a recess (6) open to one side, in which recess a clamping element (10) connected to the bar (2) is arranged, which clamping element acts on the knitting element units (3) from the side opposite the bar abutment surface (5), characterized in that the bar (2) has a base body (17) and a carrier element assembly extending in the longitudinal direction of the base body (17), wherein the clamping element (10) is arranged at the carrier element assembly and the carrier element assembly is detachably fastened to the base body (17).

2. Guide bar assembly according to claim 1, characterized in that the recess (6) is arranged on the side of the knit element unit (3) facing away from the knit element (4).

3. Guide bar assembly according to claim 1 or 2, characterized in that the recess (6) is laterally bounded by two feet (7, 8) and the gripping element (10) acts on the feet.

4. A bar assembly according to claim 3, characterized in that a torsion-resistant intermediate piece (11) acting planarly on the knitting element unit (3) is arranged between the gripping element (10) and the knitting element unit (3).

5. The bar assembly according to claim 4, characterized in that the intermediate piece (11) has a tab assembly (12, 13) oriented in a direction towards the bar (2) and counteracting the bifurcation of the feet (7, 8).

6. The bar assembly according to claim 5, characterized in that the knitting element unit (3) has a mating geometry matching the protrusion assembly (12, 13), which mating geometry cooperates with the protrusion assembly (12, 13).

7. The bar assembly according to any one of claims 4 to 6, characterized in that a spring assembly acts on the intermediate piece (11) in a direction away from the bar (2).

8. The bar assembly according to claim 7, characterized in that the spring assembly has an O-ring (14) surrounding the gripping element (10).

9. Guide bar assembly according to claim 1 or 2, characterized in that the guide bar (2) has a stop (15) for the knitting element unit (3).

10. The bar assembly according to claim 1 or 2, characterized in that the clamping element (10) is configured as a threaded fastener.

11. The bar assembly according to claim 1 or 2, characterized in that the clamping element (10) is configured as a bolt.

12. Guide bar assembly according to claim 1 or 2, characterized in that the carrier element assembly has a plurality of carrier elements (18) which are arranged adjacent to each other in the longitudinal direction of the guide bar (2).