TW201814097A - Warp-knitting machine - Google Patents

Abstract

A warp-knitting machine (1) having a machine bed (2) and a bar pack (3) which has a plurality of guide bars (4) and which by way of a drive installation (13) is movable in a swing direction (8) perpendicular to the longitudinal direction of said bar pack (3) is specified. The intention is to achieve a high operating speed by way of a simple construction. To this end, it is provided that the bar pack (3) is mounted in an articulated manner at two mounting points (6, 7) which in the swing direction (8) have a mutual spacing and which are movable relative to one another.

Description

Warp knitting machine

The present invention relates to a warp knitting machine having a machine tool and a rod set having a plurality of guide rods, and which is movable by a driving means in a rocking direction perpendicular to the longitudinal direction of the rod group.

A guide pin or other yarn guide is disposed on the guides, and when the warp knitting machine is operated, it interacts with the knitting needle (also referred to as an operating needle) to form a loop of the warp knitted fabric. During the formation of the loops, the guides are generally moved in a reciprocating manner along the longitudinal direction of the guides. One such movement is also known as "offset motion." Between these offset movements, the yarn guides must be guided through the needle slots of the knitting needles. In this regard, the guides perform a rocking motion.

In order for this rocking motion to occur, the rod set is typically suspended by a suspension shaft. The suspension shaft can be mounted in a wall that is upright on the machine. When the rod set has a large mass, for example because a larger number of guide rods are required, a beam is also often used to mount the suspension shaft.

An example of such a warp knitting machine is shown in the EP 1837428 B1 patent. Relative to the rod group, the swinging motion is controlled by two pins, which are concentrically arranged in the shaft to rotate the shafts. Therefore, it is possible to cause the rod set to be pulled and pushed around the suspension shaft so that the forces are considered to be more uniform.

In the case of such a warp knitting machine, there is a problem in that a bad vibration is at risk of being caused at a higher operating speed. In extreme cases, such vibrations can cause collisions between the weaving tools. In many instances, such vibrations can result in a compromised quality of one of the warp knits. The vibration can be caused by a larger mass to strengthen the structural element, such as the suspension shaft or the beam, which is digested. However, this in turn leads to a complicated construction and high cost.

The present invention is based on the object of achieving a high operating speed by a simple construction.

This object is achieved if it is an initial described warp knitting machine, wherein the rod set is mounted in a joint manner at two mounting points, which have a mutual spacing in the rocking direction, and The systems are movable relative to each other.

In the case of such a warp knitting machine, a suspension shaft can be dispensed with. The rod set is supported at the mounting points and carried by the mounting points. As the mounting points move relative to one another, they cause a change in the tilt of the set of rods. When the mounting points are being actuated in a corresponding manner, the guiding rods can be guided in the rocking direction by a movement in such a manner as to be conventionally suspended on a suspension shaft. The situation has also been implemented.

When the rod set moves at the mounting points, it preferably moves in a translational manner in the swing direction. This translational movement of the rod set is also transmitted to the yarn guides which are secured to the guide rods. Therefore, the translational motion and the oblique motion will overlap the motion in the swing direction. The tilting or pivoting movement of the rod set can be minimized.

Preferably, the mounting points are attached to the support assembly and are pivotable relative to a base. The support assemblies will carry the rod set. The mounting points can be moved relative to one another by pivoting the support assemblies.

Preferably, the support assemblies are inclined toward each other. A trapezoidal arrangement in which the pedestal and the set of rods are aligned in the natural position of the set of rods, so that as a result of the cross-section, for example, they will be parallel to each other.

It is also advantageous that the support assemblies will be symmetrical to one another when tilted. This will simplify the control.

Preferably, the mounting points are set to be lower than a plane in the direction of gravity, and the center of mass of the set of rods is located in the plane. Better exercise conditions can result from this.

In a preferred design embodiment, the speed at which the support assembly is provided is at the center of mass of the set of poles when the pole is in a natural position. The sets of rods will sway by changes in the inclination of the support assemblies. The speed poles are repositioned on an approximate track and the yarn guides can be moved approximately on the other track in any case.

Preferably, the support assemblies are affixed to the machine in a joint manner. This machine can be used as the base.

One or each of the support assemblies has a plurality of supports that are arranged one behind the other and can be separated in the longitudinal direction. The yarns and braided areas can then enter through the space.

Preferably, the supports are arranged in pairs in the rocking direction. Therefore, the rod set is not subjected to the bending stress of the supports.

The drive device is preferably attached to the rod set. The engagement means can for example be formed by a tappet that is driven by the spindle of the warp knitting machine.

Alternatively, the drive device can also be coupled to the support assembly. Similarly, a tappet driven by the spindle of the warp knitting machine can also be used.

Figure 1 shows schematically some of the elements of a warp knitting machine 1 in which the longitudinal direction of the warp knitting machine 1 extends perpendicular to the plane of the drawing.

The warp knitting machine 1 has a machine tool 2 and a rod set 3. A plurality of guides 4 are provided on the rod set. The guides 4 will carry a yarn guide (not shown in more detail). The yarn guides are sequentially arranged in a manner perpendicular to the plane of the drawing. Therefore, the guide rods 4 and the rod group 3 have a longitudinal system extending perpendicular to the plane of the drawing.

The rod set 3 has a center of mass 5, which is shown with an intersection.

The rod set 3 is mounted in a joint at two mounting points 6, 7. The two mounting points 6, 7 have a mutual spacing in a rocking direction indicated by double arrows 8.

The mounting point 6 is attached to a first support assembly 9 which is secured to the machine tool 2 by a joint 10. The second mounting point 7 is fastened to the second support assembly 11 and is fixed to the machine tool 2 by a second joint.

The two support assemblies 9, 11 are inclined towards each other. The support assemblies 9, 11 are arranged to be mutually symmetrical in the natural position of the rod set 3, that is to say that the support assemblies 9, 11 are in each case surrounded in opposite directions with respect to the machine tool 2. The same angle. The machine tool 2, the rod set 3, and the two support assemblies 9, 11 form a trapezoid here.

The speed poles of the support assemblies 9, 11 are at the center of the mass 5 of the rod set 3. This is shown by the dashed lines extending the support assemblies 9, 11.

The two mounting points 6, 7 are arranged below the plane in the direction of gravity, and the center of mass 5 of the set 3 is in this plane.

As can be seen from Figures 1 and 2, the inclination of the rod set 3 can be varied in a simple manner, wherein the inclination of the support assemblies 9, 11 relative to the machine tool 2 will vary. This change can for example be triggered by a drive unit, which in this embodiment has a tappet 13 that will engage the first support assembly 9. When the tappet 13 is moved in the direction of the first support assembly 9, the angle between the first support assembly 9 and the machine tool 2 is increased. Since the second support assembly 11 is coupled to the first support assembly 9 by the rod set 3, the angle between the machine tool 2 and the second support assembly 11 is reduced. At the same time, one of the translational movements of the rod set 3, in this case to the left, is caused by a change in the angle of the two support assemblies 9, 11. The guide rods 4 perform a pivotal movement because the rod set 3 is inclined. The average and pivoting motion of the rod set 3 will overlap each other. When the two support assemblies 9, 11 are moved in opposite directions, that is, when the angle between the machine tool 2 and the first support assembly 9 is reduced, and between the machine tool 2 and the second support assembly 11 As the angle increases, the set of rods 3 will move to the right, and the guides 4 will be pivoted to the right by the lower end at the same time.

Another driving possibility is shown as an alternative. A lever 14 does not engage a support assembly 9, 11 but directly engages the set 3, as shown by an imaginary line. One such tappet 14 can also be driven by the spindle of the warp knitting machine 1.

The support assemblies 9, 11 can be formed by a row of supports having a mutual spacing in the longitudinal direction of the warp knitting machine 1. The machine operator therefore has a free path between the supports to the warp yarns and the weaving zone.

Since the rod set 3 is no longer mounted on a suspension shaft, there is a greater degree of freedom to guide the yarn. The suspension shaft, or even a beam, ie the suspension shaft is suspended by it, will no longer have to be considered.

Some components are critical to vibration, such as the beam, the suspension shaft, the upper side wall of the machine tool, etc., or a linkage set, etc., may be omitted by eliminating a suspension shaft. Therefore a higher rotational speed is possible. At the same time, a relatively high rotational speed can be implemented at a lower cost.

This will result in a fine construction. Therefore, a lighter component can be used and a smaller force can be caused. This in turn helps to move towards a high rotational speed.

As mentioned above, it is possible that the yarn is fed unimpeded from above. This creates a short yarn path and a smooth yarn feed. This will result in good fabric quality in a simple way. This will result in a comfortable introduction of the yarn.

This two-point installation has advantages, especially when the rod set is heavy, such as when it receives a relatively large amount of guide rods. The two-point installation also has advantages when the rocking motion has to be made over a large distance, for example in the case of a two-stage knitting machine.

1‧‧‧ warp knitting machine

2‧‧‧ Machine tools

3‧‧‧ rod group

4‧‧‧guides

5‧‧‧Quality Center

6, 7‧‧‧ Installation points

8‧‧‧Swing direction

9, 11‧‧‧Support assembly

10, 12 ‧ ‧ live festival

13, 14‧‧ ‧ tappet

The invention will be described in conjunction with the drawings by a preferred embodiment. In the drawings: Figure 1 shows a schematic representation of the height of a warp knitting machine in the natural position of a set of rods; and Figure 2 shows the elements of Figure 1 and a tilted set of rods.

Claims (12)

A warp knitting machine has a machine tool, and a rod set has a plurality of guide rods and is movable by a driving device in a rocking direction perpendicular to a longitudinal direction of the rod group; characterized in that the rod group is The articulated manner is mounted at two mounting points that have a mutual spacing in the rocking direction and that are movable relative to each other. A warp knitting machine according to claim 1, characterized in that the rod group moves in a translational manner in the rocking direction when one of the mounting points moves. A warp knitting machine according to claim 1 or 2, characterized in that the mounting points are provided on the support assembly, which are pivotable relative to a base. A warp knitting machine according to claim 3, characterized in that the support assemblies are inclined toward each other. A warp knitting machine according to claim 4, characterized in that the support assemblies are arranged to be symmetrical with each other in the natural position of the rod group. A warp knitting machine according to any one of claims 1 to 5, characterized in that the mounting points are set lower than a plane in the direction of gravity, and the center of mass of the rod group is located in the plane. A warp knitting machine according to any one of claims 3 to 6, characterized in that the speed of the support assemblies is at the center of mass of the rod set when the speed of the support assembly is at a natural position. A warp knitting machine according to any one of claims 3 to 7, characterized in that the support assemblies are fixed to the machine tool in a joint manner. A warp knitting machine according to any one of claims 3 to 6, characterized in that one or each of the support assemblies has a plurality of supports which are arranged one above another and which are spaced apart in the longitudinal direction. A warp knitting machine according to claim 9, characterized in that the supports are arranged in pairs in the rocking direction. A warp knitting machine according to any one of claims 1 to 10, characterized in that the driving device is coupled to the rod set. A warp knitting machine according to any one of claims 3 to 10, characterized in that the driving device is coupled to the support assembly.