CN111850806B

CN111850806B - Warp knitting machine and method for assisting operator in warp knitting machine

Info

Publication number: CN111850806B
Application number: CN201911029790.5A
Authority: CN
Inventors: K·布兰德; C·施奈德
Original assignee: Carlmeyerstol R & D Co ltd
Current assignee: Carlmeyerstol R & D Co ltd
Priority date: 2019-04-30
Filing date: 2019-10-28
Publication date: 2021-08-27
Anticipated expiration: 2039-10-28
Also published as: KR20200126895A; TW202041738A; JP2020183604A; TWI740381B; EP3511460A2; CN111850806A; KR102372118B1; JP7014846B2; EP3511460B1; EP3511460A3

Abstract

The invention relates to a warp knitting machine having a thread guide bar (3), a push rod (8) and a spring pull system (2) which can pull the thread guide bar (3) against the push rod (8) and press it against the push rod. According to the invention, the warp knitting machine (1) has a drive which can act on the spring pull system (2) such that the tension applied to the guide bar (3) by the spring pull system (2) is varied. The invention also relates to a method for assisting an operator in a warp knitting machine (1), wherein according to the invention a drive of the warp knitting machine (1) acts on a spring pull system (2) of the warp knitting machine (1) such that a pulling force applied by the spring pull system (2) to a guide bar (3) of the warp knitting machine (1) is varied.

Description

Warp knitting machine and method for assisting operator in warp knitting machine

Technical Field

The invention relates to a warp knitting machine having a thread guide bar, a push rod and a spring pulling system which can pull the thread guide bar towards the push rod and press it against the push rod.

Background

Such warp knitting machines are known from the prior art. Thus, CN205676612U shows an arrangement that allows driving the guide bar by a push rod. The jacquard device is used to move the guide bar longitudinally, which moves the push rod. The spring pull system in this arrangement consists of a pull cord to which the spring applies a pulling force. The stay cord transmits pulling force to the guide bar, thereby compressing the guide bar to the push rod.

The warp yarns required for warp knitting are provided by the warp beam of a warp knitting machine. The thread guide bar needs to be removed for warp beam replacement. To remove the guide bar, the pull cord must first be disengaged from the guide bar. Since the pull cord exerts a significant force on the guide bar, it cannot be removed by hand. Instead, the spring pull system must be disassembled with the aid of a tool. This is cumbersome and quite time consuming.

Disclosure of Invention

The invention is therefore based on the object of assisting the operator of the warp knitting machine when the guide bar is removed, so that this process is facilitated.

This object is achieved by providing a warp knitting machine with a drive which can act on a spring pull system in such a way that the tension applied to the guide bar by the spring pull system is varied. Thus, for example, the tensile force of the spring pulling system acting on the thread guide bar can be reduced. Here, the pull cord of the spring pull system is relaxed. The pull cord can then be removed from the guide bar by hand. The thread guide bar can now no longer be pulled closer to the push rod by the spring pulling system. The operator can therefore remove the push rod and perform further steps to remove the thread-guide bar.

According to the invention, the drive means can act directly or indirectly on the spring pull system. The fact that the drive device acts on the spring pulling system means that the drive device exerts a force on the spring pulling system, so that the state of the spring pulling system changes. To this end, the drive device can be connected or can be connected to the spring pulling system according to the invention. According to the invention, the drive device can be arranged remote from the spring pull system or integrated therein.

Advantageously, the warp knitting machine has a control unit which is set up to control the drive device in such a way that the tension applied to the guide bar by the spring pull system is reduced when the warp knitting machine receives a command for detaching the guide bar. The control unit can then be set up such that it can receive commands, which then control the drive accordingly. According to the invention, the control unit may be a machine computer, a microcontroller, an SPS module, or the like. According to the invention, the command can be transmitted to the warp knitting machine by means of an input unit, such as a keyboard, network communication or radio communication. The instruction is then forwarded to the control unit.

Preferably, the spring-pulling system has a pin which can be moved towards the thread-guide bar by means of a drive. The pin is preferably connected to a component of the warp knitting machine by at least one spring of a spring pull system. Thereby, the spring pull system can establish its pulling force. The drive device can apply a force to the cotter in the direction opposite to the pulling force of the spring pulling system, i.e. towards the guide bar. According to the invention, the spring pull system may have, in addition to the bolt, also a pull cord which is connected directly or indirectly to the bolt. The pulling cord may be attached to a guide bar, for example, on which it is suspended. If the cotter is moved to the guide bar, the tension at which the pull cord is located is reduced.

It is particularly preferred that the warp knitting machine has a pusher shoe with a guide channel in which the pin is mounted. According to the invention, it is possible to provide at least one spring of the spring pulling system in the guide channel, which spring connects the bolt and the pusher shoe to one another. The pusher shoe is a part of the warp knitting machine that guides the pin. In an advantageous embodiment of the invention, the pusher shoe acts on the push rod, so that the thread guide bar can be driven by the pusher shoe.

According to the invention, it is possible for the warp knitting machine to have a force transmission element, wherein the pusher shoe and the force transmission element can be moved relative to one another by the drive. It is therefore possible for the pusher shoe and/or the force-transmitting element to be moved by the drive device such that their positions relative to one another change. According to the invention, it is also possible for the pusher shoe and the force transmission element to be connected to different drives. When the pusher and the force-transmitting element are displaced relative to each other, the force-transmitting element acts on the pin, so that the pin is displaced, thereby reducing the tensile stress of the spring-pulling system on the thread-guide bar.

The guide channel preferably forms an opening on the side of the pusher shoe facing away from the guide bar. The opening establishes access to a pin of the spring pull system. The pin can thus be moved from the side of the pusher shoe facing away from the thread guide bar.

According to a special embodiment of the invention, the cotter projects out of the opening in the holding position (the thread guide bar is pressed by the spring pull system towards the push rod). In the retaining position, the force-transmitting member does not exert a force on the pin and at least one spring of the spring pull system retains the pin in a position in which it protrudes from the opening. The pin is thus easily accessible.

The force transmission element is preferably a stop, which can be operatively connected to the bolt by a relative movement of the pusher and the stop with respect to each other. In this case, it is preferred that the force transmission element is arranged on the side of the sliding element facing away from the thread guide bar. According to the invention, it is possible that the pusher shoe is moved toward the stop when the pusher shoe and the stop are moved relative to each other, while the stop is stationary. Alternatively, it is possible that the stop is moved towards the pusher during the relative movement of the pusher and the stop, while the pusher is stationary.

Advantageously, the drive means are jacquard means of a warp knitting machine. The patterning device of the warp knitting machine is preferably connected to the pusher shoe so that the patterning device can move the pusher shoe. Jacquard is a special drive for warp knitting machines, which is suitable for moving the guide bar in the longitudinal direction. According to the invention, the patterning device may be a patterning disc, a servomotor or other drive means.

According to a particular embodiment of the invention, the warp knitting machine has a control unit which is set up to control a patterning device of the warp knitting machine such that the patterning device moves the guide bar along its longitudinal axis, while controlling a warp beam drive of the warp knitting machine such that the yarn tension of the warp yarns moving between the warp knitting machine warp beam and the guide bar is kept constant during the movement of the guide bar. This serves to avoid the warp yarns being subjected to excessively high loads as described below.

The thread guide bar must be moved along its longitudinal axis in order to be removed. At this point it moves significantly further than during knitting. This usually results in a very tight pulling of the warp threads moving between the warp beam and the guide bar. At this point, the yarn may be damaged. Thus, according to the invention, it can be provided that a corresponding amount of yarn is paid out by the warp beam while the guide bar is moved. For this purpose, the beam must be driven accordingly by means of a beam drive. By the warp beam warp being matched exactly to the movement of the guide bar, it is avoided that too much or too little yarn material is discharged. This facilitates the process steps that have to be carried out before the guide bar is removed.

The invention also relates to a method for assisting an operator in a warp knitting machine with a guide bar. According to the invention, the method is designed in such a way that the drive of the warp knitting machine acts on a spring pull system of the warp knitting machine, so that the tension applied by the spring pull system to the guide bars of the warp knitting machine is varied.

When the warp knitting machine receives a command to unload the guide bar, the force applied by the spring pull system to the warp knitting machine is preferably reduced by the drive means. The warp knitting machine can obtain the instruction through an input unit such as a keyboard, network communication, radio communication, or the like. The pin of the spring pull system is preferably moved under the action of the drive device towards the guide bar when the force exerted by the spring pull system is adjusted. According to the invention, the method can be designed in such a way that the pin-mounted pusher shoe of the warp knitting machine and the force transmission element of the warp knitting machine are moved relative to one another by the drive.

The method is particularly preferably carried out in such a way that the patterning device of the warp knitting machine is controlled in such a way that it moves the guide bar, while the warp beam drive of the warp knitting machine is controlled in such a way that the yarn tension of the warp yarns running between the warp beam and the guide bar of the warp knitting machine remains constant during the movement of the guide bar.

Drawings

Possible embodiments of the invention are shown in the figures, in which:

figure 1 shows a schematic view of a warp knitting machine according to the invention with a spring pull system,

figure 2 shows a schematic view of a spring pull system and pusher shoes, push rods and stops of a warp knitting machine,

figure 3 shows a pusher shoe and spring pull system in a schematic sectional view,

fig. 4 shows a schematic view of a warp knitting machine, wherein the spring pull system is relaxed,

fig. 5 shows a schematic view of a spring pull system of a warp knitting machine, as well as a pusher shoe and a stop, wherein the spring pull system is relaxed,

FIG. 6 shows a second embodiment of the invention, where the stop is moved, an

Fig. 7 shows a third embodiment of the invention, in which the drive is integrated into the pusher shoe of the warp knitting machine.

List of reference numerals

1 warp knitting machine

2 spring pulling system

3 guide bar

4 knitting needle guide bar

5 warp beam

6 warp yarn

7 pusher dog

8 push rod

9 stop

10 pulling rope

11 bolt

12 guide channel

13 opening

14 spring stack

15 pin shaft

16 direction of movement

17 holding pin

18 drive rod

19 drive device

20 gears

21 rack

Detailed Description

Fig. 1 shows a schematic view of a warp knitting machine 1 according to the invention with a tensioned spring pull system 2. The warp knitting machine 1 has a guide bar 3 and a needle bar 4. Warp beams 5 of the warp knitting machine 1 are loaded with warp threads 6, of which only one warp thread 6 is shown by way of example in fig. 1. The warp threads 6 are guided from the warp beam 5 to the guide bar 3. Below the thread guide bar 3, the warp threads 6 are hooked by the not shown needles of the needle bar 4 during knitting and knitted into a cloth.

Fig. 2 shows a schematic view of the spring pull system 2 of the warp knitting machine 1 as well as the pusher shoe 7, the push rod 8 and the stop 9. The thread-guide bar 3, which is only shown partially in fig. 2, must be moved along its longitudinal axis during the knitting process. This movement is facilitated by a drive, not shown, of the warp knitting machine, which is connected to pusher shoe 7 by a drive rod 18. The drive is a jacquard device with a servomotor. The jacquard device moves pusher shoe 7 by means of a drive rod 18. Pusher shoe 7 in turn moves a push rod 8 which drives guide bar 3 of the warp knitting machine. The spring pull system 2 serves for the secure coupling of the push rod 8 to the guide bar 3. The pulling rope 10 of the spring pulling system 2 pulls the thread guide bar 3 towards the pusher 7, so that the thread guide bar 3 is pressed towards the push rod 8. A stop 9 is arranged on the side of pusher shoe 7 facing away from guide bar 3. The drive rod 18 extends only through the stop 9 and is not operatively connected to the stop.

Figure 3 shows a schematic cross-sectional view of pusher shoe 7 and spring pull system 2. The bolt 11 of the spring pull system 2 is mounted in a guide channel 12 of the pusher shoe 7. Pusher shoe 7 has an opening 13 on the side of pusher shoe 7 facing away from the guide bar. The spring stack 14 of the spring pull system 2 applies a pulling force to the pin 11. In the holding position shown, the pull cord 10 of the spring pull system 2 is tensioned and the bolt 11 projects out of the opening 13. Push rod 8 is only shown in part and is pressed against pusher shoe 7 in the retaining position as a result of the tension of spring pull system 2.

Fig. 4 shows a schematic view of the warp knitting machine 1, where the spring pull system 2 is relaxed. In order to remove the guide bar 3, the latter must be passed under by the pin 15 on which the guide bar 3 is mounted. The user gives an instruction to the warp knitting machine 1. A control unit, not shown, of the warp knitting machine 1 then causes the guide bar 3 to move towards the end of the pin 15. This is done by a jacquard device of the warp knitting machine 1, which moves the pusher shoe 7 in the direction of movement 16. Since the guide bar 3 must overcome a comparatively large displacement distance, the warp beam drive of the warp knitting machine 1 is simultaneously controlled by the control unit. The beam drive drives the beam 5. It is thus ensured that the warp threads 6, of which only one is shown by way of example, are subjected to a yarn tension which remains constant despite a long displacement distance.

Pusher shoe 7 is moved towards stop 9 until the condition shown in figure 4 occurs. The bolt of spring pull system 2, which was previously protruding from the opening of pusher shoe 7 and which was not visible in fig. 4, is now pressed almost completely into the guide channel of pusher shoe 7. Thereby, the pulling rope 10 is already loosened. The pulling cord 10 can now be detached from the guide bar 3 and the push rod 8 can be removed from the gap between the pusher shoe 7 and the guide bar 3. The guide bar 3 can then be detached from the pin 15 by hand.

Fig. 5 shows a schematic view of spring pull system 2, with pusher shoe 7 and stop 9, wherein spring pull system 2 is relaxed. The pulling cord 10 of the spring pull system 2 hangs loosely and can be pulled off the retaining pin 17 of the guide bar 3.

Fig. 6 shows a second embodiment of the invention, in which the stop 9 is displaced. A spring pull system 2 of the warp knitting machine of the invention is shown. The stop 9 is associated with its own drive rod 18, so that it can be moved. By means of its associated drive rod 18, the stop 11 is connected to a stop drive, not shown, which is provided in addition to the warp knitting jacquard. When the bolt 11 of the spring pull system 2 is to be pressed into the pusher shoe 7 in order to lock the pull cord 10 of the spring pull system 2, the stop 9 is moved by the stop drive in a movement direction 16 until the stop 9 abuts against the pusher shoe 7. Pusher shoe 7 remains stationary during this time.

Fig. 7 shows a third embodiment of the invention, where the drive 19 of the warp knitting machine according to the invention is integrated into pusher shoe 7 of the warp knitting machine. A spring-pulling system 2 is fixed in pusher shoe 7. The drive device 19 is activated when the pull cord 10 of the spring pull system 2 should be locked to change the pulling force applied by the spring pull system 2 to the guide bar. The gear 20 of the drive means 19 meshes with a toothed rack 21 mounted on the bolt 11 of the spring pull system 2. The rotation of the gear 20 causes the pin 11 to move, so that the tension applied to the guide bar by the spring pulling system 2 varies.

Claims

1. A warp knitting machine (1) with a guide bar (3), a push rod (8) and a spring pull system (2), which can pull the thread-guiding bar (3) towards the push rod (8) and can press the thread-guiding bar against the push rod, characterized in that the warp knitting machine (1) has a drive (19) which can act on the spring pull system (2), so that the force applied to the guide bar (3) by the spring-pull system (2) is varied, the warp knitting machine (1) having a control unit, the control unit is set up to control the drive device (19) so that when the warp knitting machine (1) receives a command to discharge the guide bar (3), the pulling force applied to the guide bar (3) by the spring pulling system (2) is reduced.

2. Warp knitting machine (1) according to claim 1, characterized in that said spring pulling system (2) has a pin (11) movable towards said guide bar (3) by said driving means (19).

3. Warp knitting machine (1) according to claim 2, characterized in that the warp knitting machine (1) has a pusher shoe (7) with a guide channel (12) in which the pin (11) is mounted.

4. Warp knitting machine (1) according to claim 3, characterized in that the warp knitting machine (1) has a force transmission element, wherein the pusher shoe (7) and the force transmission element are movable relative to each other by the drive device (19).

5. Warp knitting machine (1) according to claim 4, characterized in that the guide channel (12) has an opening (13) on the side of the pusher shoe (7) facing away from the guide bar (3).

6. Warp knitting machine (1) according to claim 5, characterized in that the cotter (11) protrudes out of the opening (13) in a holding position in which the guide bar (3) is pressed to the push rod (8) by the spring pulling system (2).

7. Warp knitting machine (1) according to one of the claims 4 to 6, characterized in that the force transmission element is a stop (9) which is operatively connectable to the pin (11) by a movement of the pusher element (7) and the stop (9) relative to each other.

8. Warp knitting machine (1) according to claim 1, characterized in that the drive means (19) are jacquard means of the warp knitting machine (1).

9. Warp knitting machine (1) according to claim 1, characterized in that the warp knitting machine (1) has a control unit which establishes a jacquard device for controlling the warp knitting machine (1) so that the jacquard device moves the guide bar (3) along the longitudinal axis of the guide bar (3) and which simultaneously controls a warp beam drive of the warp knitting machine (1) so that the yarn tension of the warp yarns (6) moving between the warp beam (5) and the guide bar (3) of the warp knitting machine (1) is kept constant while the guide bar (3) is moving.

10. A method for assisting an operator in a warp knitting machine (1), characterized in that a drive (19) of the warp knitting machine (1) acts on a spring pull system (2) of the warp knitting machine (1) so that the tension applied by the spring pull system (2) to a guide bar (3) of the warp knitting machine (1) is changed, the tension applied by the spring pull system (2) to the warp knitting machine (1) being reduced by the drive (19) when the warp knitting machine receives a command to discharge a guide bar.

11. Method according to claim 10, characterized in that the pin (11) of the spring pull system (2) is moved towards the guide bar (3) by the drive means (19).

12. Method according to claim 11, characterized in that the pusher shoe (7) of the warp knitting machine (1) on which the pin (11) is mounted and the force transfer member of the warp knitting machine (1) are moved relative to each other by the drive means (19).

13. Method according to claim 10, characterized in that the patterning device of the warp knitting machine (1) is controlled so that it moves the guide bar (3) and simultaneously the warp shaft drive of the warp knitting machine (1) is controlled so that the yarn tension of the warp yarns (6) moving between the warp shaft (5) and the guide bar (3) of the warp knitting machine (1) is kept constant during the movement of the guide bar (3).