TWI791213B - Knitting element bar assembly for warp knitting machines - Google Patents

Abstract

The invention describes a knitting element bar assembly of a warp knitting machine, the knitting element bar assembly has a bar and a plurality of knitting element units, wherein each knitting element unit has a plurality of knitting elements, wherein the knitting element The element unit rests on the bar with the bar contact surface and is fastened on the bar in a detachable manner. Care and maintenance of such a knitting element bar assembly is intended to be designed simply. For this purpose, it is provided that at least one knitting element unit has a recess open to one side, in which a clamping element connected to the bar is arranged, and the clamping element abuts against the bar The facing sides act on the knitting element unit.

Description

Knitting element bar assembly for warp knitting machines

field of invention

The present invention relates to a knitting element bar assembly of a warp knitting machine, the knitting element bar assembly has a bar and a plurality of knitting element units, wherein each knitting element unit has a plurality of knitting elements, wherein the knitting element unit is in the form of a comb The bar abutment surface is attached to the comb place and can be fixed on the comb place in a detachable manner.

Background of the invention

There are basically two possibilities for fixing the knitting elements on the bars of the warp knitting machine. One possibility consists in providing knitting element receptacles on the bar, for example in the form of grooves or slits, which are oriented perpendicularly to the longitudinal extension of the bar. The braided elements are inserted individually into the grooves or slits and are then secured with covers or the like and prevented from falling out.

Another possibility consists in integrating a plurality of knitting elements in a so-called knitting element unit. Typically, knit elements are injected into knit element units. In this case, the braiding element unit is made of lead or another metal or also of plastic or a combination of these. A knit element unit typically has a width of 1 or 2 inches and accordingly has a plurality of knit elements.

The invention relates to the last-mentioned possibility.

When fitting the knitting element unit on the bar, the threaded fastener is guided through the hole in the knitting element unit and the threaded fastener is then screwed into the bar.

However, knitting elements are wearing parts of warp knitting machines that must 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 knitting element unit (herausgezogen, sometimes also translated as screwing out) and inserted into a new knitting element unit. Afterwards, the threaded fastener must be screwed into the bar again. The method of operation is not just expendable. Since the bar often has a length of several meters and a correspondingly large number of braiding element units, it often happens that the threaded fastener falls off and has to be searched for. The risk of threaded fasteners falling into the warp knitting machine and causing major injuries during operation is too great. Accordingly, the exchange of knitting element units is time-consuming and requires trained and skilled personnel.

Summary of the invention

The invention is based on the task of providing a simple design for the maintenance and maintenance of the knitting element bar assembly of a warp knitting machine.

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

With this construction, replacement of the knitting element unit is relatively simple and less prone to errors. The clamping element must be disengaged, but can still remain connected to the bar. After the clamping element has been disengaged, the knitting element unit can be pulled out. In this case, the knitting element unit can slide with its bar contact surface on the corresponding counter surface of the bar over a small distance. Once the knitting element unit has left the knitting area of the clamping element, the knitting element unit is released by the bar and can be removed. The loading of new knitting element units is performed in reverse order. The knitting element unit is brought with its bar contact surface against the bar and pushed into the holding element with the open recess, so that the holding element then sits in the recess. The clamping element can then be tensioned again and securely fixes the knitting element unit on the bar. The only part that must be separated from the bar is the knitting element unit. Accordingly, no further components can be lost.

Preferably, the recess is arranged on the side of the knit element unit facing away from the knit element. The knitting element unit can then be removed transversely to the longitudinal extension of the bar and reassembled in the opposite direction, that is to say also transverse to the longitudinal extension of the bar. This makes it possible to replace individual knit element units without having to likewise remove adjacent knit element units.

Preferably, the recess is bounded laterally 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 spreading the feet can be kept low. In the event of a spread of the feet, the knit element units are deformed, which can negatively affect the positioning of the knit elements relative to one another.

Preferably, a torsionally fixed intermediate part acting on the knit element unit is arranged between the clamping element and the knit element unit. By virtue of the intermediate part acting flatly on the knitting element unit (which can be designed simply as a plate, for example), the clamping force can be distributed over the knitting element in a flat manner. Due to the rotation resistance, a defined position of the intermediate part relative to the knitting element unit is always guaranteed. Both of these help to counteract the deformation of the knitting element unit. The risk of having to orient the knitting element again after assembly of the knitting element unit is accordingly kept low.

It is also advantageous if the middle part has a projection arrangement which is oriented in the direction of the bar and counteracts the spread of the foot. For example, the lug arrangement is located on the outside of the foot, so that when the foot is to be spread apart, the foot comes into contact with the lug arrangement. That is to say, the intermediate part forms a kind of lock.

In this case, it is advantageous if the knit element unit has a counter-geometry adapted to the projection assembly, which interacts with the projection assembly. For example, the protrusion arrangement can be triangular in cross-section. The knit element unit then has corresponding oblique sections on the foot.

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

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

Preferably, the bar has a stop for the knitting element unit. This has two advantages. On the one hand, the position of the knitting element unit transverse to the longitudinal extension of the bar is delimited, on the other hand the stop forms an anti-twist which prevents the knitting element unit when tensioning the clamping element or during operation middle twist.

Advantageously, the clamping element is configured as a screw or screw. To disengage the clamping element, it is sufficient to turn the screw or the screw, for example by one revolution. As a result, 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 screw in the opposite direction is then again necessary. That is to say, the exchange of the knitting element unit can be carried out with little effort.

Preferably, the 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 on the carrier element assembly and the carrier element assembly is detachably fastened on the base body. This configuration is particularly advantageous in the case of a complete replacement of all knitting element units. The knitting element unit can be mounted on the carrier element assembly as long as the carrier element assembly has not yet been fastened to the basic body. For example, the carrier element assembly can also be equipped mechanically and, if necessary, the orientation of the braiding element can also be carried out automatically or machine-controlled. The carrier element assembly can then be fixed on the base body. On the warp knitting machine itself, on which there is generally only a small amount of space available for the operator, only a small amount of handling is then necessary. The fastening of the carrier element assembly on the base body can take place, for example, by screw 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 a carrier element can, for example, have a length of 21 inches (53.34 cm). A carrier element with such a length is well manipulable and can be positioned relative to the base body. As a result, division differences can be compensated over the entire width of the bar.

Detailed ways

Figure 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 knitting element unit 3 has a plurality of knitting elements 4 , which in the present case can be designed as laying needles. The knitting element unit 3 has a bar contact surface 5 with which the knitting element unit rests against the bar 3 . As will be described further below, each knitting element unit 3 is fastened detachably on the bar 2 .

Three knitting element units 3 are shown in FIG. 1 . The right knitting element unit 3 is only in contact with the bar 2 and is not already fixed there.

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

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

The bar 2 has threaded holes 9 into which threaded fasteners 10 ( FIG. 2 ) or corresponding screws 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 has not yet been attached to the bar 2 .

To facilitate this fastening, an intermediate part 11 is provided, which can also be referred to as a “clamping plate” and acts flat against the knitting element unit 3 . The middle piece 11 also covers the feet 7 , 8 . The middle part 11 is fixed against rotation. The intermediate part can act on the knitting element unit 3 only in one angular position of rotation or in a few angular positions of rotation. This ensures that a predetermined tension distribution on the knitting element unit 3 is always achieved.

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 part 11 . The middle part 11 has a protrusion arrangement with two protrusions 12 , 13 which surround the two feet 7 , 8 on the outside when the middle part 11 is lying on the knit element unit 3 . In this case, the feet 7 , 8 have a correspondingly configured outer side which cooperates with the inclined inner side of the projections 12 , 13 . The projections 12 , 13 prevent the feet 7 , 8 from being able to spread apart when, that is to say, the middle part 11 is tightened onto the knitting element unit 3 by means of the threaded fastener 10 . This can lead to undesired deformations of the knitting element unit 3 .

It can also be provided that the projections 12 , 13 do not act on the outside of the feet 7 , 8 , but instead a corresponding deepening is provided in the feet 7 , 8 into which the projections 12 , 13 can enter. . In this case, the intermediate piece 11 does not have to have a greater 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 knit element unit 3 . The O-ring 14 forms a spring assembly which pushes the intermediate part 11 away from the bar 2 when the threaded fastener 10 is disengaged slightly.

The bar 2 has stops 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 bar 2 . The stop 15 thus forms a positioning aid. In addition, the stop also forms an anti-twist, so that the knitting element unit 3 can be mounted on the bar 2 in a predetermined orientation, wherein the orientation does not change even when the threaded fastener 10 is tightened.

For the replacement of the knitting element unit 3, the following steps are now necessary. First, the threaded fastener 10 must be disengaged slightly. For this, usually one spin is enough. That is to say, the threaded fastener 10 can rest in the bar 2 . Thereby, the threaded fastener cannot be lost.

The knitting element unit 3 can be removed from the bar 2 in the direction of the double arrow 16 as soon as the threaded fastener 10 has been disengaged to such an extent that the intermediate piece 11 no longer presses the knitting element unit 3 against the bar 2 . The direction of the double arrow 16 runs approximately perpendicular to the longitudinal extension of the bar 2 . The intermediate part 11 is here kept at a certain distance from the bar 2 because the O-ring 14 prevents the intermediate part 11 from approaching the bar 2 .

Then, the new or modified knitting element unit 3 can be pushed into the intermediate space kept open by the O-ring 14 between the intermediate piece 11 and the bar 2, that is to say the knitting element unit is pushed into the intermediate space until the knitting element unit 3 comes into abutment against the stop 15 . Afterwards, only the threaded fastener 10 has to be tightened again, wherein only one rotation is necessary again in order to generate 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 bar 2 . The bar 2 has a base body 17 to which a plurality of carrier elements 18 are fastened. The carrier elements are arranged one behind the other in the longitudinal direction of the bar 2 , relative to the illustration in FIG. 4 , that is to say perpendicular to the plane of the drawing. The carrier element is mounted on the base body 17 in a mountable and detachable manner. The carrier element has, for example, a length of 21 inches (that is to say 53.34 cm). Such a length also enables good handling and fixation on the base body 17 with the desired precision.

The carrier element can already be equipped with the knitting element unit 3 beforehand and the knitting 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 point where there is enough space available for handling.

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

When a periodic replacement of the knitting elements is necessary, the carrier element 18 can be completely replaced. When only a single knitting element unit fails and has to be replaced, the threaded fastener 10 can be disengaged and the corresponding knitting element unit 3 can be removed.

The fastening of the carrier element 18 on the base body 17 is not shown in more detail. The fastening can take place, for example, by screw fasteners.

1: Bar components 2: comb bar 3: knitting element unit 4: Knitting elements 5: Bar against the surface 6: notch 7,8: feet 9: threaded hole 10: Threaded fasteners 11: Middleware 12,13: protrusion 14: O-ring 15: stop part 16: double arrow 17: Matrix 18: Carrier element

In the following, the present invention is described according to preferred embodiments with reference to the accompanying drawings. in: Figure 1 shows a very schematic view of a knitting element unit at a bar, Figure 2 shows a bar with knitting element units from one side, Figure 3 shows the middleware, and Figure 4 shows a modified embodiment of the bar assembly.

1: Bar components

2: comb bar

3: knitting element unit

4: Knitting elements

6: notch

7,8: feet

9: threaded hole

10: Threaded fasteners

11: Middleware

14: O-ring

16: double arrow

Claims (11)

A knitting element bar assembly of a warp knitting machine, which has a bar and a plurality of knitting element units, wherein each knitting element unit has a plurality of knitting elements, wherein the knitting element unit abuts against the bar abutting surface The comb is fixed at the comb and can be detachably fixed there, it is characterized in that at least one knitting element unit has a recess open to one side, in which is arranged a Clamping element, which acts on the knitting element unit from the side opposite the abutment surface of the bar, wherein the bar has a base body and a carrier element assembly extending in the longitudinal direction of the base body , wherein the clamping element is arranged on the carrier element assembly and the carrier element assembly is detachably fixed on the base body. The bar assembly of claim 1, wherein the notch is disposed on a side of the knit element unit facing away from the knit element. A comb assembly according to claim 1 or 2, wherein the recess is laterally bounded by two feet and the clamping element acts on the feet. The bar assembly according to claim 1 or 2, wherein a torsionally fixed intermediate part acting on the knitting element unit is arranged between the clamping element and the knitting element unit. A bar assembly as claimed in claim 4, wherein said intermediate piece has a tab assembly oriented in a direction towards said bar and counteracting the diverging of said feet. The bar assembly of claim 5, wherein said knitting element unit has a mating geometry that mates with said lug assembly, said mating geometry cooperating with said lug assembly. The comb assembly according to claim 4, wherein the spring assembly acts on the middle member in a direction away from the comb. The comb assembly of claim 7, wherein the spring assembly has an O-ring surrounding the clamping element. The bar assembly according to claim 1 or 2, wherein the bar has a stop for the knitting element unit. The comb assembly according to claim 1 or 2, wherein the clamping element is configured as a threaded fastener or a bolt. The bar assembly according to claim 1, wherein the carrier element assembly has a plurality of carrier elements which are arranged adjacent to each other in the longitudinal direction of the bar.

Images