TWI740451B - Loop forming tools and warp knitting machines - Google Patents

Abstract

The invention relates to a loop forming tool and a warp knitting machine. The loop forming tool (1) is used to be installed in a groove of the bar of the warp knitting machine, and has a long metal loop forming piece (2). The loop forming piece has a functional part (4) and a rod Department (3). According to the present invention, the loop forming tool (1) has a plurality of interconnected loop forming pieces (2). The warp knitting machine has a bar and a loop-forming member (2) arranged in the bar, wherein each loop-forming member (2) has a rod part (3) and a functional part (4), wherein the bar There are a plurality of grooves for accommodating the loop-forming member (2). According to the present invention, a plurality of interconnected loop-forming members (2) are arranged in each groove.

Description

Loop forming tools and warp knitting machines

The present invention relates to a loop-forming tool used to be installed in a groove of a bar of a warp knitting machine.

The warp knitting machine has a loop forming tool, which processes the warp yarn into a textile material during the knitting process, the so-called knitted product. The warp knitting machine also has a plurality of bars, and a plurality of loop forming tools are respectively arranged on one bar. Because multiple loop-forming tools can move simultaneously with the help of one comb, multiple loops are formed at the same time during the knitting process. This is why the production capacity of warp knitting machines is very high. These individual loop-forming tools are subject to high mechanical loads especially during high-speed production.

The loop forming tool is usually fixed directly on the bar of the warp knitting machine, as shown in EP3354782A1. A plurality of grooves are opened in the bar, and a loop forming tool is inserted into the grooves. The loop forming tool is fixed on the bar bar by means of a needle seat cover plate, which is fixed to the bar bar by screws and the loop forming tool is reliably held in the groove. The installation of the loop-forming tool on the bar has the following advantages compared with the use of the loop-forming tool holder disclosed in EP2570540B1, for example, the loop-forming tool can be replaced separately when it is worn or otherwise damaged. The loop-forming tool holder combines multiple loop-forming tools, but they can only be replaced in groups. The use of the loop-forming tool holder and the fixing means used to mount it on the bar may determine a higher bar weight. This adversely affects machine movement.

When fixing these individual loop forming tools in the bar groove, it is disadvantageous that only one loop forming tool is installed on the bar with one installation step. In addition, it was observed that the loop-forming tool deformed transversely to the longitudinal axis of the bar during operation. In this direction, the loop-forming tool and especially the knitting needles bear the greatest load. Because of the deformation, the quality of the knitted product manufactured by the warp knitting machine may be reduced.

Therefore, the present invention is based on the task of providing a loop-forming tool which allows faster installation. The invention is also based on the task of stabilizing the loop-forming tool so as to suppress the deformation of the loop-forming tool. This task is accomplished by a loop-forming tool of the type described in the introduction, which has a plurality of interconnected loop-forming members according to the invention. The loop-forming tool of the present invention therefore has more than two loop-forming members. The loop-forming tool is wider than conventional loop-forming tools and can accordingly only be inserted into a wide groove provided for this purpose. Because each loop-forming tool has multiple loop-forming parts, significantly fewer installation steps are required. The bars can therefore be loaded significantly faster. In addition, the mutually connected loop-forming members are mutually stabilized, so that the deformation of the loop-forming members is suppressed.

According to the present invention, the functional part of the loop-forming member may be a hook, an eyed needle or the like. The rod of the loop-forming member is an elongated section of the loop-forming member, which is at least partially set in a groove of a comb when used in accordance with regulations. The functional part protrudes from the comb. The rod part also forms the foot of the loop. The loop-forming members are preferably oriented parallel to each other. Advantageously, these loop-forming members are arranged in alignment with each other.

Preferably, a connecting member of the loop-forming tool is respectively arranged between adjacent loop-forming members of the loop-forming tool, and the connecting member separates the loop-forming members from each other and connects the loop-forming members to each other in a material joint manner. Through this connecting piece, these loop-forming pieces are kept at intervals. Facts have shown that the material joint connection of the loop-forming parts contributes to effective mutual stability.

Advantageously, the connecting piece is designed in a continuous strip shape, that is, the connecting piece forms a narrow connecting piece between adjacent loop-forming pieces. According to the present invention, the strip-shaped connecting piece can be designed to be round or flat. Or it is possible that the connecting member has other shapes, for example it may extend flatly between adjacent loop-forming members.

The connecting member is preferably arranged partially or completely above the lower one-sixth of the loop-forming member between adjacent loop-forming members, respectively starting from the bottom foot of the loop-forming member. The bottom surface is located on the loop-forming member opposite to its functional part. As the facts indicate, a very good stabilization effect occurs when the connecting members are arranged between the loop-forming members as described. But even when the connecting piece is arranged below the lower one-sixth, a certain stabilization effect is achieved.

Preferably, the connecting member acts on the side surfaces of the adjacent loop-forming members facing each other. The side surface of the loop-forming member provides a large enough surface for the connecting member to be fixed on the loop-forming member. The side can withstand the force well. However, it is also possible that the connecting member acts on other surface parts of the loop-forming member.

It is particularly advantageous that the connecting member only acts on the sides of adjacent loop-forming members facing each other. Therefore, a compact structure of the loop forming tool is obtained.

According to the present invention, it is possible that adjacent loop-forming members are connected to each other only by the connecting member. They are located between or on the loop-forming members, i.e. there are no other connecting members connecting the loop-forming members. This keeps the total weight of the loop-forming tool as light as possible.

According to a special embodiment of the present invention, the connecting member is aligned with the loop forming member. By arranging the connecting piece in alignment with the loop-forming member, a compact configuration of the loop-forming tool results. The loop-forming tool can be packaged and transported in a space-saving manner.

The connecting member is preferably made of plastic and is glued to the loop forming member adjacent to the connecting member. In this way, sufficient stability of the loop-forming part is achieved. As the plastic, for example, a plastic leg can be selected, but other plastics can also be used.

Alternatively, the connecting member may be made of metal, wherein there is a metallic material joint connection between the connecting member and the adjacent loop-forming member. The metal connection of the looped parts has proven to be particularly stable.

Preferably, the connecting member is welded to the loop forming member adjacent to the connecting member. The loop-forming tool is manufactured according to this, and a plurality of loop-forming parts are first provided. These loop-forming members are oriented parallel to each other, wherein a connecting member is respectively arranged between adjacent loop-forming members. The loop-forming member is then welded to the connecting member. This results in a stable connection of the loop-forming member and the connecting member. According to the present invention, the connecting member may be made of the same metal as the loop-forming member. However, according to the invention, it is also possible that the connecting element is made of a metal different from the loop-forming element.

It is especially preferred that the loop-forming tool is of a one-piece construction. Such a loop forming tool can be cast in one piece by means of a casting method, for example. A very stable connection between the loop-forming member and the connecting member is obtained.

Advantageously, the loop-forming tool consists of two loop-forming members and a connecting member. Therefore, the loop forming tool only has two loop forming pieces and one connecting piece. This arrangement has proven to be particularly stable. A loop-forming tool with more loop-forming parts allows faster bar loading, but the stability decreases as the number of loop-forming parts increases.

The loop-forming member is preferably a knitting needle. They encounter a lot of force in warp knitting. However, according to the present invention, the loop-forming member may also be an eye needle or other loop-forming tool. Compound needles are preferably used as knitting needles in the arrangement according to the invention. However, according to the present invention, it can also be other types of knitting needles such as latch needles or press needles.

The present invention also relates to a warp knitting machine, the warp knitting machine has a bar and a loop-forming member arranged in the bar, wherein each loop-forming member has a rod part and a functional part, and the bar has a plurality of In the groove that accommodates the looped piece. The transverse deformation of the loop-forming part along the longitudinal axis of the bar was observed during high-speed production. The invention is therefore based on the task of a loop-forming tool stabilized in the groove of the bar. To accomplish this task, a plurality of interconnected loop forming pieces are arranged in each slot of the warp knitting machine. Therefore, these loop-forming members are mutually stable. Two or more interconnected loop-forming members are arranged in each groove. According to the invention, the warp knitting machine may have one or more needle bed covers, which laterally close the grooves. According to the present invention, the bar can be a needle bar, a guide bar, or a bar with other functions of a warp knitting machine.

According to the previous embodiment, it is preferable to provide a loop-forming tool in each groove. Different advantages related to stability, durability, compactness or other properties can be obtained from this. According to a special embodiment of the present invention, the connecting piece is arranged in the groove. This means that the connecting piece is located in the groove when the loop-forming tool is placed in the bar according to regulations. The effect that the connecting piece is supported on the bar appears. In an alternative embodiment of the present invention, the connecting piece is arranged outside the groove.

According to the present invention, it is also possible that the size of the groove is set such that the two outer loop-forming members of the loop-forming tool respectively abut against the sheet of the bar with their rods. The lamella separate the grooves from each other. This leads to the stability and fixation of the loop forming tool in the bar.

Fig. 1 shows a schematic diagram of a first variant of the loop-forming tool 1 of the present invention. The loop forming tool 1 has two loop forming pieces 2. Each loop forming part 2 has a rod part 3 and a functional part 4. The functional part 4 is a needle hook. The connecting piece 5 of the loop forming tool 1 connects the two loop forming pieces 2. The loop forming member 2 and the connecting member 5 are made of metal. The connecting member 5 is welded to the two sides 6 of the loop-forming member 2 facing each other. The loop forming tool 1 has only two loop forming pieces 2.

Figure 2 shows a schematic view of a second variant of the loop-forming tool 1 of the present invention. The loop forming tool 1 is provided with five loop forming pieces 2. This is divided into two outer loop forming parts 7 and three inner loop forming parts 8. Adjacent loop-forming members 2 are connected to each other by connecting members 5 respectively. This loop-forming tool 1 allows a particularly fast loading of bars due to the considerable number of loop-forming pieces 2 per loop-forming tool 1.

Fig. 3 schematically shows a part of the bar 9 of the warp knitting machine according to the present invention. The bar 9 has a plurality of grooves 10 which are sharpened into the bar 9. One of the grooves 10 is left empty, for example. In the other grooves 10, a loop-forming tool 1 of the present invention is respectively arranged. Each loop forming tool 1 has two loop forming parts 2, and each loop forming part is connected to each other by a connecting piece 5. The connecting element 5 in particular stabilizes the loop-forming element 2 with respect to the force acting in the transverse direction of the longitudinal axis 11 of the bar 9. The mutual stabilization of the interconnected loop-forming members 2 occurs. The shank 3 of each loop-forming member 2 abuts a sheet 12. The loop-forming members 2 are therefore fixed in the bar 9 in such a way that they cannot move along the longitudinal axis 11 of the bar 9. The loop forming member 2 is also seated on the bottom surface 14 of the groove with a bottom foot 13 respectively.

1: Loop forming tool 2: Looped pieces 3: pole 4: Function Department 5: Connector 6: side 7: Outer ring parts 8: inner loop parts 9: comb 10: Slot 11: Longitudinal axis 12: flakes 13: bottom foot 14: groove bottom

The drawings show advantageous embodiments of the invention, in which: [FIG. 1] A schematic diagram showing a first modification of the loop forming tool of the present invention, [FIG. 2] A schematic diagram showing a second modification of the loop forming tool of the present invention, and [Fig. 3] A schematic diagram showing a part of the bar of the warp knitting machine of the present invention.

1: Loop forming tool

2: Looped pieces

3: pole

4: Function Department

5: Connector

6: side

Claims (17)

A loop-forming tool (1), the loop-forming tool is used to be installed in a groove (10) of a bar (9) of a warp knitting machine, the loop-forming tool has a long metal loop-forming piece (2) ), the loop forming part has a functional part (4) and a rod part (3), characterized in that the loop forming tool (1) has a plurality of loop forming parts (2) connected to each other, and A connecting piece (5) of the loop forming tool (1) is arranged between adjacent loop forming pieces (2) of the loop tool (1), and the connecting piece makes the loop forming pieces (2) mutually spaced apart They are connected to each other in a material joint manner, and the connecting member (5) is made of metal, and there is a metal material joint connection between the connecting member (5) and the loop-forming member (2) adjacent to the connecting member (5). The loop forming tool (1) according to claim 1, wherein the connecting piece (5) is formed in a continuous strip form. The loop-forming tool (1) according to claim 1 or 2, wherein the connecting piece (5) between the adjacent loop-forming pieces (2) is partially or completely disposed on the forming The upper part of the lower one-sixth of the loop piece (2) is respectively counted from the bottom foot (13) of the loop forming piece (2). The loop forming tool (1) according to claim 1 or 2, wherein the connecting member (5) acts on side surfaces (6) of the adjacent loop forming members (2) facing each other. The loop forming tool (1) according to claim 4, wherein the connecting member (5) only acts on the side surfaces (6) of the adjacent loop forming members (2) facing each other. The loop forming tool (1) according to claim 1 or 2, wherein the adjacent loop forming members (2) are connected to each other only by the connecting member (5). The loop forming tool (1) according to claim 1 or 2, wherein the connecting member (5) is aligned with the loop forming member (2). The loop forming tool (1) according to claim 1 or 2, wherein the connecting member (5) is made of plastic and is bonded to the loop forming member (2) adjacent to the connecting member (5). The loop-forming tool (1) according to claim 1, wherein the connecting piece (5) and The loop-forming member (2) adjacent to it is welded. The loop-forming tool (1) according to claim 9, wherein the loop-forming tool (1) is integrally formed. The loop forming tool (1) according to claim 1 or 2, wherein the loop forming tool (1) is composed of two loop forming pieces (2) and one connecting piece (5). The loop-forming tool (1) according to claim 1 or 2, wherein the loop-forming member (2) is a knitting needle. A warp knitting machine, the warp knitting machine has a bar (9) and a loop-forming member (2) arranged in the bar (9), wherein each loop-forming member (2) has a rod (3) And a functional part (4), wherein the comb (9) has a plurality of grooves (10) for accommodating the loop-forming member (2), characterized in that each groove (10) is arranged with each other Multiple connected loops (2). The warp knitting machine according to claim 15, wherein a loop-forming tool (1) according to any one of claims 1 to 12 is arranged in each slot (10). The warp knitting machine according to claim 14, wherein the connecting piece (5) is arranged in the groove (10). The warp knitting machine according to claim 14, wherein the connecting piece (5) is arranged outside the groove (10). The warp knitting machine according to any one of claims 13 to 16, wherein the size of the groove (10) is set to the two outer loop forming pieces (2, 7) of the loop forming tool (1) The rods (3) are respectively pressed against the sheets (12) of the bar (9).

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