JP2019148051A - Double-bar warp knitting machine - Google Patents

Abstract

To provide a double-bar warp knitting machine having high productivity.SOLUTION: A double-bar warp knitting machine comprises a first needle bed (2), a second needle bed (3), and a bar assembly (24). The first needle bed comprises a first warp knitting tool assembly comprising a plurality of warp knitting tool types (4, 6, 8) which are each connected to a first main shaft (10) in connection with drive technique by drive units (11, 12, 31). The second needle bed comprises a second warp knitting tool assembly comprising a plurality of warp knitting tool types (14, 16, 18) which are each connected to a second main shaft (20) in connection with drive technique by drive units (21, 22, 32). The bar assembly is movable between the first needle bed and the second needle bed. The bar assembly through first drive units (29, 31) is operatively connected to the first main shaft. The bar assembly through second drive units (30, 32) which cause the same movement of the bar assembly as the first drive units is operatively connected to the second main shaft.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a double bar warp knitting machine having a first needle bed, a second needle bed, and a bar assembly, and the first needle bed is connected to a first main shaft with respect to a driving technique by a driving device. A first warp knitting tool assembly having a plurality of warp knitting tool types, and a second needle bed having a plurality of warp knitting tool types each connected to a second main shaft with respect to a driving technique by a driving device. And the bar assembly is movable between the first needle bed and the second needle bed. The bar assembly also supports the warp knitting tool.

  This type of warp knitting machine is used, for example, to produce a warp knitted spacer fabric. The warp knitted spacer fabric has two cover layers between which spacer yarns are disposed. The two cover layers are each formed by a warp knitting tool, and the warp knitting tools that serve to form the cover layer are each assigned to a needle bed. A bar assembly that guides the spacer thread between the first cover layer and the second cover layer and thus between the first needle bed and the second needle bed is used for the spacer thread. The needle bed of each type of warp knitting machine is usually fixed to a bar. Each bar in the loop formation procedure must perform a predetermined action. Said movement is generated by a drive device operatively connected to the main shaft. The drive device in this specification is a general term for all movable parts having kinematic characteristics related to the type of warp knitting tool and the operation of the warp knitting tool.

  Multiple drive devices of the same type typically engage the bar over the length of the bar. The more drives that engage a single bar, the faster the warp knitting machine can in principle operate. The more drives there are, the more support positions and the more force per support position for each bar.

  However, the increase in the number of drives per bar has limits that are determined from an economic point of view. For economic reasons, as few drives as possible should be used to minimize noise, friction, component costs, and assembly costs. Limited installation space is another issue. An arbitrary number of drive units cannot be installed in a specific width portion of the warp knitting machine. Since there are various types of warp knitting tools with different movements in each needle bed, the number of drives per warp knitting tool type and per warp knitting tool movement range must be divided according to load and dynamics.

Each spindle in one revolution is subjected to different loads and thus different forces and moments, for example due to rotational imbalance and eccentricity. This leads to fluctuations in rotational speed, which can only be tolerated to a certain limit. In the case of a double bar warp knitting machine, the movement of the bar assembly guiding the spacer yarn is usually caused by one of the main shafts, which is further loaded, increasing the torque variation and thus also the rotational speed variation. there is a possibility. However, in the operation of the warp knitting machine, it is important that the two spindles are operated in synchronization with each other. This defines a limit in terms of operating speed. Furthermore, when the gear mechanism is used to drive both spindles, wear increases when both spindles are at different rotational speeds, and this wear results in warp knitting machine productivity. Potentially downtime that can be adversely affected.
An object of the present invention is to specify a double bar warp knitting machine having high productivity.

  The object in the case of a double bar warp knitting machine of the type mentioned at the outset is achieved by a bar assembly, the first drive being operatively connected to the first main shaft, the same bar assembly operation as the first drive. This is achieved by the fact that the second drive device that causes the movement is operatively connected to the second main shaft.

  With this solution, the load generated by the drive of the bar assembly is more evenly distributed between the two main shafts. Each spindle is responsible for controlling the movement of the bar assembly. This not only has the advantage that the load can be distributed more evenly between the two main shafts. Furthermore, driving the bar assembly by a plurality of “supporting positions” distributed over the length of the bar assembly is achieved to improve the stability of the bar assembly.

  The at least one first driving device is preferably arranged in an intermediate space between the two second driving devices so as to be parallel to the main axis. Therefore, it is possible to alternately activate the bar assembly by so-called two main shafts. Of course, it is also possible to arrange at least one second drive device between at least two first drive devices. In an ideal case, the first and second drive devices are arranged alternately along the length of the bar assembly. A point-symmetric arrangement can also be used.

  In a preferred embodiment, each main shaft has a plurality of portions, each portion is mounted on a gear case, adjacent gear cases are connected to each other by an intermediate shaft, and at least two gear cases are parallel to the main shaft. They are shifted from each other. A gear case, also called a “crankcase”, typically has a portion of each main shaft attached to both ends thereof. If the gear cases are offset (displaced) from each other so that they are parallel to the main axis, the respective support positions on the bar assembly are likewise offset from each other so that they are parallel to the main axis in a simple manner ( Can be shifted). The offset means that the gear cases are arranged with a gap therebetween. However, it is also possible for the gear cases to overlap each other in a direction parallel to the main axis.

  The bar assembly is preferably driven by movement resulting from the superposition of two basic movements, each basic movement being controlled by a drive device distributed between both main axes. One of the basic operations is the rotational motion that is utilized to form the loop. The loop formation is carried out at a time shift, at least twice per revolution of the main shaft and thus once per needle bed. The other basic movement in this case is the movement between the two needle beds. Other basic movements help to overcome the large spacing between the needle beds. If the movement of the bar assembly due to superposition consists of two basic movements, this facilitates the control of the movement and enables the production of a thick warp knitted spacer fabric.

Here, it is preferable that at least a part of the main shaft controls the first basic motion and the second basic motion. In this case, two different drive devices are thus arranged in the main shaft part, and each of the two different drive devices controls one of the two basic operations.
It is also advantageous that the drive device for controlling the first basic motion and the drive device for controlling the second basic motion are arranged continuously on the main shaft. This also keeps the load on each spindle low.

  In one preferred embodiment configuration, a drive connected to the first spindle engages the bar assembly at a first position relative to the depth of the warp knitting machine and is connected to the second spindle. The drive device engages the bar assembly at a second position relative to the depth of the warp knitting machine, wherein the first position and the second position are a center extending parallel to and between the main axes. Arranged on different sides of the plane. The “depth” of the warp knitting machine in this specification is the direction between two needle beds. In this case, the drive engages the bar assembly outside the center between the needle beds.

  In the present specification, the first position and the second position are preferably arranged symmetrically with respect to the central plane. In this way, the warp knitting machine can be composed at least in large part from two substantially or completely identical machine parts arranged back to back. This facilitates manufacture and therefore keeps costs low.

  Each spindle has a dedicated drive motor. In this example, it is only necessary to synchronize the two drive motors, which can be achieved by a motor controller. The wear of the drive assembly between the two spindles is thus kept low.

The invention is described below by means of preferred embodiments with reference to the drawings.
It is the schematic of 1st Embodiment of a double bar warp knitting machine. It is the schematic of embodiment which simplified the double bar warp knitting machine. FIG. 3 is a plan view of the embodiment of FIG. 2.

  A double bar warp knitting machine 1 schematically shown has a first needle bed 2 and a second needle bed 3. The first needle bed 2 has, for example, a warp knitting tool that forms a first cover layer of a warp knitted spacer fabric, and the second needle bed 3 forms a second cover layer of a warp knitted spacer fabric. Has a warp knitting tool.

  For this purpose, the first needle bed 2 includes a warp knitting needle 4 disposed on the warp knitting needle bar 5, a guide needle 6 disposed on the guide needle bar 7, and a stitch comb disposed on the stitch comb bar 9. And a sinker 8. All the warp knitting tools arranged in one of the bars 5, 7, 9 in each case perform the same operation. Said movement is controlled by a first spindle 10 which is connected to the respective bars 5, 7, 9 via drive devices 11, 12, 13. The drives 11, 12, 13 are shown here as lines only. In practice, the drive device typically comprises a plurality of elements, such as an eccentric cam or connecting rod on the first spindle 10, and levers, joints and tappets, as is known per se.

  In the same manner, the second needle bed 3 has a warp knitting needle 14 disposed on the warp knitting needle bar 15, a guide needle 16 disposed on the guide needle bar 17, and a stitch disposed on the stitch comb bar 19. And a comb sinker 18. In the same way as in the case of the first needle bed, the bars 15, 17, 19 are driven by a second spindle 20 connected to the respective bars 15, 17, 19 via drive devices 21, 22, 23. The

The two needle beds 2, 3 can in principle be configured to be mirror-symmetric with each other, in which case they can be arranged back to back with each other.
In many double bar warp knitting machines, the guide needles 6, 16 and thus the guide needle bars 7, 17 are not moved. The associated drive devices 12, 22 can be omitted in this example.

  The warp knitting machine 1 further has a bar assembly 24 by which the yarn is guided in a manner that reciprocates between the two needle beds 2 and 3. In this way, the bar assembly 24 is provided for producing spacer yarns in the warp knitted spacer fabric. The bar assembly 24 has a plurality of bars 25, each carrying a guide needle 26 or a needle having a hole. In order not to constitute clarity, the guide needle 26 is shown only on one bar.

  The operation of the bar assembly 24 consists of two basic operations. The first basic movement is caused by a first lever assembly 27 to which the second lever assembly 28 is mounted like a joint, and the second lever assembly 28 controls the second basic movement. To do. The first basic operation reciprocates the bar assembly between the two needle beds 2,3. The second basic operation allows the bar 25 to form a loop by the guide needle 26 of the bar 25. Accordingly, the second basic movement is very small and basically guides the guide needle 26 around the warp knitting needle 4 of the first needle bed 2 or around the warp knitting needle 14 of the second needle bed 3. Only useful to help.

  The first lever assembly 27 is controlled by the first main shaft 10 using the first driving device 29, and is controlled by the second main shaft 20 through the second driving device 30. However, both drives 29, 30 give the same movement to the first lever assembly 27.

  The first drive device 29 and the second drive device 30 (in a manner perpendicular to the plane of the drawing) are respectively engaged at different positions on the first lever assembly 27 over the operating width or length of the warp knitting machine. Match. In this way, two objectives are achieved. On the one hand, the first lever assembly 27 can be driven by the two main shafts 10, 20 in a relatively large number of support positions. On the other hand, the load from the first lever assembly 27 is evenly distributed to the two main shafts 10, 20, and as a result, there is a slight difference in the torque caused by the movement of the first lever assembly 27. It acts on the main shafts 10 and 20. Variations in the rotational speed of the two main shafts 10, 20 can therefore be kept low and can have at least approximately the same profile as each other.

  A second basic movement for controlling the second lever assembly 28 is also caused by both spindles 10, 20 via the first drive device 31 and the second drive device 32. The two driving devices also drive the second lever assembly 28 in a similar manner and engage at different positions over the length or operating width of the warp knitting machine 1. In the case of two lever assemblies 27, 28, this is emphasized in that the two drive devices 29, 30, or 31, 32 engage in front or behind the lever assemblies 27, 28, respectively.

  FIG. 2 shows an embodiment of a simplified design of the warp knitting machine 1 where only one basic movement of the bar assembly 24 is required. Accordingly, only one lever assembly 28 controlled by the two driving devices 31 and 32 is provided, the first driving device 31 is operatively connected to the first main shaft 10, and the second driving device 32 is The second spindle 20 is operably connected.

The two drive devices 31, 32 engage at different positions distributed over the length or operating width of the warp knitting machine 1, which means that the first drive device 31 engages behind the lever assembly 28, It is emphasized that the second drive 32 is engaged in front of the lever assembly 28. Both drives 31, 32 also give the bar assembly 24 the same movement.
FIG. 3 very schematically shows a plan view of the warp knitting machine 1 according to FIG. For the sake of clarity, the stitch comb sinkers 9, 19 are not shown here.

  The main shaft 10 is driven by a drive motor 33. The main shaft 20 is driven by a drive motor 34. The two drive motors 33, 34 are electrically synchronized with each other and are represented by line 35. However, it is also possible to mechanically synchronize the two drive motors 33, 34 with each other, or to use a single motor that drives both drive shafts 10, 20 by a gear mechanism.

  The main shaft 10 has a plurality of portions 35, 36 and 37, which are connected to each other by an intermediate shaft 38. For the sake of clarity, the intermediate shaft 38 is shown only between the parts 36 and 37 and is connected to the two parts 36 and 37 via couplings 39 and 40. The same type of intermediate shaft is provided between the portion 35 and the portion 36 and between the drive motor 33 and the portion 35.

A portion 35 of the main shaft 10 is disposed in the gear case 41, a portion 36 is disposed in the gear case 42, and a portion 37 is disposed in the gear case 43. The gear case is also referred to as a “crankcase”.
Drive units 11 and 12 for driving the warp knitting needle bar 5 and for driving the guide needle bar 7 are connected to the portions 35, 36 and 37 of the first main shaft 10. Further, the first portion 35 and the second portion 37 via the main shaft 10 are connected to the lever assembly 28 by the first driving device 31, and the lever assembly 28 controls the bar assembly 24.

In a similar manner, the second main shaft has a first portion 44 and a second portion 45, the first portion 44 is attached to the first crankcase 46, and the second portion 45 is the second portion 45. 2 to the crankcase 47.
The first portion 44 is connected to the warp knitting needle bar 15 via the drive device 21. The first portion 44 is further operatively connected to the guide needle bar 17 via the drive device 22. Further, the second portion 45 is operatively connected to the warp knitting needle bar 15 via the driving device 21 and is operably connected to the warp knitting needle bar 17 via the driving device 22.

Furthermore, the two parts 44, 45 via the second drive device 32 are operatively connected to the lever assembly 28 of the bar assembly 24, and the drive of the bar assembly 24 is simultaneously and simultaneously via both main shafts 10 and Done in the same way.
As is the case with the first main shaft 10, the two portions 46, 45 and the motor 34 are connected by an intermediate shaft, which is not shown in detail for the sake of clarity.

  The gear cases 41, 42, 43 of the first main shaft 10 and the gear cases 46, 47 of the second main shaft 20 are arranged away from each other in parallel with the longitudinal direction of the main shafts 10, 20. Here, the gear cases 41, 42, 43 and the gear cases 46, 47 can even overlap each other. The gear cases 41, 42, 43 and the gear cases 46, 47 may be arranged with a gap therebetween.

  Depending on the operating width or length of the warp knitting machine, three illustrated portions 35, 36, 37 of the first main shaft 10 and two portions 44, 45 or more of the second main shaft 20 are also provided. The The minimum distance from one crankcase to the next can be, for example, 300 to 350 mm. The spacing between the devices 11, 12, 31, or 21, 22, 32 in the crankcase can be, for example, 140-150 mm.

  As drawn from FIG. 3, the two second driving devices 32 are arranged between the two first driving devices 31. However, the first driving device 31 and the second driving device 32 can be alternately arranged.

  The warp knitting machine embodiment shown in FIGS. 2 and 3 operates only with one basic movement of the bar assembly 24. As shown in FIG. 1, when the bar assembly 24 is driven by a motion composed of a superposition of a first basic motion and a second basic motion, in this case, a driving device 29 for controlling the first basic motion, 31 and the drive devices 30 and 32 for controlling the second basic operation can be continuously arranged on the main shafts 10 and 20 and, of course, the reverse is also possible. The two drive devices in this case are preferably arranged in one gear case. However, it is also possible to distribute the drive device to a plurality of gear cases.

  As seen in FIGS. 1 and 2, the drive devices 29 and 31 connected to the first main shaft 10 and the drive devices 30 and 32 connected to the second main shaft 20 are levers on both sides of the central plane. Engaging the assemblies 27, 28, the central plane extends parallel to and between the main shafts 10,20.

Claims (9)

A double bar warp knitting machine having a first needle bed (2), a second needle bed (3) and a bar assembly (24),
The first needle bed (2) has a plurality of warp knitting tool types (4, 6, 8) each connected to the first spindle (10) with respect to the drive technology by the drive device (11, 12, 31). A plurality of warp knittings having a first warp knitting tool assembly, wherein the second needle bed (3) is connected to the second main spindle (20), respectively, with respect to the drive technique by the drive device (21, 22, 32). A second warp knitting tool assembly having a tool type (14, 16, 18), the bar assembly (24) being movable between the first needle bed (2) and the second needle bed (3); In the double bar warp knitting machine,
The bar assembly (24) via the first drive device (29, 31) is operably connected to the first spindle (10), and the first drive device (29, 31) and the bar assembly (24) are connected. The double bar warp knitting machine, in which the bar assembly (24) via the second drive device (30, 32) causing the same movement of is operatively connected to the second spindle (20).   2. The intermediate space between two second drive devices (32), wherein at least one first drive device (31) is arranged parallel to the main shaft (10, 20). Warp knitting machine.   Each main shaft (10, 20) has a plurality of portions (35, 36, 37; 44, 45), and each portion (35, 36, 37; 44, 45) has a gear case (41, 42, 43; 46). 47), adjacent gear cases (42, 43) are connected to each other by an intermediate shaft (38), and at least two gear cases (35, 36, 37; 46, 47) are connected to the main shaft (10, 20). The warp knitting machine according to claim 1, wherein the warp knitting machines are arranged so as to be parallel to each other.   The bar assembly (24) is driven by the movement resulting from the superposition of the first basic movement and the second basic movement, each basic movement being distributed between both main shafts (10, 20). 30; 31, 232), the warp knitting machine according to any one of claims 1 to 3.   The warp knitting machine according to claim 4, wherein at least a part of the main shaft drives a drive device that controls the first basic motion and a drive device that controls the second basic motion.   6. The warp knitting machine according to claim 4, wherein the drive device that controls the first basic motion and the drive device that controls the second basic motion are sequentially arranged on the spindle or vice versa.   The drive devices (29, 31) connected to the first spindle (10) engage the bar assembly (24) at a first position relative to the depth of the warp knitting machine (1), and the second The drive devices (30, 32) connected to the main shaft (20) engage the bar assembly (24) at a second position relative to the depth of the warp knitting machine, and the first position and the second position. Is a warp knitting machine according to any one of claims 1 to 6, arranged on both sides of a central plane parallel to the main shaft (10, 20) and passing between the main shafts (10, 20).   The warp knitting machine according to claim 7, wherein the first position and the second position are arranged so as to be symmetrical with respect to the center plane.   The warp knitting machine according to any one of claims 1 to 8, wherein each spindle (10, 20) has a dedicated drive motor (33, 34).

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