JPH0611935B2 - Knitting method of fishing net - Google Patents

Description

TECHNICAL FIELD The present invention relates to an improved braided net method for fish nets, and an object thereof is to increase the braided net speed with a simple and rational configuration. The aim is to improve work efficiency and to substitute marking by changing the mesh in the knitting net.

(B) Conventional technology A conventional braiding machine has a single motor 1 as shown in FIG.
0 output shaft through the main shaft 10a, the yarn supply mechanism 4,
5, the rotation is transmitted to each of the loop making mechanism 6, the stitching mechanism 7, and the stitch feeding mechanism 9, and the single driving system is configured to mutually operate the above mechanisms to perform the knitting.

(C) Problems to be Solved by the Invention In the conventional braiding method, when a series of processes such as yarn supply, loop making, eye tightening and eye feeding is regarded as one cycle, it is operated at a speed suitable for the one cycle. However, the rate at which each mechanism operates in the one cycle is
Naturally, the mechanism limits it. Therefore, in the stitch feed mechanism 9 for determining the mesh size, 36
Grain feed must be completed within a short time such as 70/0, and the larger the mesh size, the larger the feed speed is required. That is, the warp yarn A (the yarn sent from the creel stand) and the weft yarn B (the yarn wound on the spool) by the knitting mechanism including the yarn supplying mechanisms 4, 5, the loop making mechanism 6, and the stitching mechanism 7, The spool is stored in the shuttle and knots are formed with the yarn supplied from the shuttle. The net feed is carried out by the eye feeding mechanism 9 after the completion of the knot until the next knot is made. Since the (distance between the nodules) determines the mesh size, it is necessary to increase the net feed to make a large mesh size.

The index feeding mechanism 9 comprises an index feeding roller 9a and a driving mechanism for the index feeding roller 9a which is a combination of a cam 9b that moves in conjunction with the knitting mechanism, a swing arm 9c, a chain 9b, and the like. 9a is configured to feed the net, but it has to rotate rapidly by an angle corresponding to a predetermined feed amount within a short time such as 70/360 in one cycle, so that the mesh is large. If it is set, the rotation angle of the eye feeding roller increases in proportion to it, and naturally the rotation speed of the eye feeding roller also increases. However, since the rotation speed of this index feed roller is also limited, when knitting with a larger mesh size, the speeds of other processes should be set low in accordance with the maximum rotation speed of the index feed roller. It has to be carried out by increasing the relative speed difference, and in the end, the time required for one cycle is extended, and as a result, the work efficiency deteriorates. On the other hand, when changing the mesh spacing, the feed mechanism mechanically adjusts the feed amount, so once the feed amount is adjusted, the feed amount is changed until the predetermined knitting work is completed. It was difficult, and it was virtually impossible to change the partial mesh size during the knitting. Therefore, it is impossible to partially change the meshes at the end of a knitting net having a predetermined length and to make a mark, that is, to use the difference in meshes for marking.

D. Means for Solving the Problems Therefore, the present inventor has noticed that the above-mentioned various drawbacks are caused by the knitting mechanism and the feed mechanism of the knitting machine being controlled by one drive system. By implementing this in separate drive systems, a new braiding method was invented.

According to the configuration of the present invention, a knitting drive system that drives a knitting mechanism that includes a yarn supply mechanism, a loop making mechanism, and a stitching mechanism, and a stitch feeding drive system that drives a stitch feeding mechanism are separately provided. The drive source in the drive system is a servo motor, and the knitting servo motor, which constantly rotates, is decelerated during the index feed process, while the index feed servo motor is rotated only during the index feed process. It is to control automatically.

E action A knitting drive system and a feed drive system for driving the feed mechanism are provided separately to decelerate the constantly rotating knitting servo motor during the feed process, while moving the feed servo motor to the feed process. By automatically controlling the rotation speeds of both servo motors so as to rotate only when, the knitting net can be performed at the optimum and maximum speed according to the mesh size. Further, since it is possible to appropriately change the mesh size during the knitting net, if a portion having a different mesh size is created each time the knitting net is finished, it can be used as a mark for separating the nets. Further, since a servo motor having a large starting torque and excellent control characteristics is used as a drive source in both drive systems, it can be digitally controlled.

F. Examples A method for knitting a fish net according to the present invention will be described with reference to the drawings.

FIG. 1 shows an outline of a knitting machine used in the knitting method of the present invention. The drive source of the drive system for operating the knitting mechanism is a servo motor having a large starting torque and an excellent braking characteristic ( Hereinafter, a knitting motor) 1 is used. The driving force of the knitting motor is transmitted to the main shaft 3 via the reduction gear mechanism 2, and the warp supplying mechanism 4, the weft supplying mechanism 5, and the loop making mechanism 6 are transmitted from the main shaft 3.
Also, it is configured to be supplied to each mechanism of the closing mechanism 7. On the other hand, a servo motor (hereinafter referred to as a feed motor) 8 is also used as a drive source of a drive system for operating the feed mechanism, and the feed motor is stopped during the operation of the knitting mechanism, Feed roller only when 9 is operated
9a is directly driven, and the above-mentioned two servo motors rotate in synchronization with each other to perform the knitting net.

The loop making mechanism 6 is supplied with the warp yarn A by the warp yarn supplying mechanism 4 and the weft yarn B by the weft yarn supplying mechanism 5, respectively. Make a nodule. The index feeding mechanism 9 is provided below the loop making mechanism 6, and the index feeding motor 8 adjusts the index feeding roller 9a to a desired mesh within a limited time between the knot working and the next knot working. The set feed is performed by rapidly rotating by a corresponding circumferential length, and the mesh is determined by the rotation amount of the feed roller 9a.

In the knitting machine configured in this way, the mechanical feed mechanism is eliminated and the frequency of failures is reduced, and since the servo motor is used as each drive source, the supply voltage and frequency of each servo motor, etc. It is possible to easily and freely control the knitting speed by changing the value and utilizing the characteristics of the servo motor. That is, for example, the second
As shown in FIG. A, if the rotation speed of the knitting motor 1 is reduced only to the maximum value in the range that does not hinder the indexing, it is normally set to a large value within the range that does not hinder the knitting mechanism. The average speed of the braid can be kept high. In this case, the rotation of the knitting motor other than during the index feeding step is increased in the knitting step in the knitting step at a portion which does not hinder the knitting work even at a high rotation speed, as shown in FIG. Rotate only slowly,
It is also possible to increase the knitting speed as a whole. Further, since the index feeding roller is appropriately rotated by the dedicated servo motor, efficient knitting can be performed by instantaneously rotating the index feeding roller only during index feeding as shown in FIG. 2c. Even for a knitting net having a large mesh size, it is possible to set the average value of the knitting net speed larger than that of the conventional one. Further, since the control of both drive systems can be easily performed even during the knitting net by adopting the servo motor, for example, when the nets are continuously knitted, the mesh size is changed only by a specific mesh by an automatic control mechanism, and the mesh size is changed. It is also easy to use the mesh for marking. That is, when a plurality of knitting nets are continuously performed, the rotation speed of the stitch feed motor is automatically controlled to change (accelerate or decelerate) only at the time of one stitch knitting at the end of the knitting net, and the knitting net is finished. For example, if one with a small mesh size is created as shown in FIG. 3 and it is used as a mark for dividing the net,
The so-called marking operation which has conventionally been used to mark a net with a pen or the like is unnecessary.

It is to be noted that the servo motors 1 and 8 used have a large starting torque and are excellent in braking characteristics, and are advantageous in exerting the merit of the present invention.

Next, an example of control for controlling both motors using a computer will be described. Note that this control example is an OSP which is a servo motor controller for general-purpose general industrial machines.
In this example, 5 (trade name) is used.

FIG. 4 is a block diagram showing only an example of a control system which is closely related to the present invention, and is organized through the amplifier unit 13 in accordance with a command of the computer main body 12 according to a program input to the data setting panel 11. The drive control of the drive motor 1 and the feed motor 8 is performed. In this embodiment, since one set of amplifier units is incorporated in the computer main body 12, the amplifier unit incorporated in the computer main body 12 is used to drive the knitting motor 1. The program is also configured so that, for example, data of paper tape can be input from the interface 14 through the I / O circuit 15. In the drawing, the pulse handle 16 is used to release both motors 1 and 8 from the program control of the computer so that they can be manually operated at the time of initial setting of the apparatus.

Next, based on the flowchart shown in FIG. 5, both motors 1, 8
The control example of is shown. In the case of this embodiment, the variable for setting the mesh size on the program is set to V3 and the variable for selecting the knitting pattern is set to V10, and the mesh size is determined by the numerical value input to V3. , V10, one kind of braided mesh pattern is selected from the medium speed braided mesh pattern, the high speed braided mesh pattern, and the low speed braided mesh pattern. The above-mentioned braided net patterns are shown in FIGS.
Is preprogrammed to be controlled as follows. That is, in the medium-speed knitting net pattern, the knitting motor is rotated at a constant speed of 70% of the rotation speed of the high-speed knitting net pattern, and the eye feeding motor is driven only during the eye feeding. In the high-speed knitting net pattern, the knitting motor is rotated at a constant speed at an arbitrary set speed, and the eye feeding motor is driven only at the time of eye feeding. The low-speed knitting net pattern is designed so that the knitting motor is initially rotated at the above-mentioned set speed to reduce it to the maximum value in the range that does not hinder the feeding at the time of feeding, and when the feeding operation is completed, the original speed is restored. At the same time, the feed motor is driven at the time of feed. The control mechanism first calculates the rotation amount of the feed motor on the program based on the input value of V3, and when V3 is 8 (when the length between the nodules is 80 mm) or more, a determination circuit. 17 forcibly executes the program 18 of the low-speed knitting pattern. V3 is 80
In the following cases, the determination circuit 19 does not execute any knitting pattern if it is 15 or less. If V3 is between 80 and 15, according to the input value of V10, the medium speed knitting / meshing pattern program 20 is executed when it is 0, and the high speed knitting / meshing pattern program 21 is executed when it is 1. In the case of 2, the program 18 of the low speed knitting net pattern is executed. In this way, the rotations of both motors are controlled according to the mesh. Further, the computer main body 12 counts the number of meshes, and when the number of meshes reaches a predetermined number, a sub-program 18 'programmed with an automatic marking pattern from the programs 18, 20, 21 of the respective knitting net patterns, Moving to 20 ', 21', a program for executing the subprograms 18 ', 20', 21 'is input. Therefore, if you partially change the mesh size and use it as a marker for the end of knitting, all you have to do is enter the number of meshes per unit of fishing net in the data setting panel and the mesh pattern will automatically be calculated. Program to the sub-program of each automatic marking pattern, the sub-program is executed and knitting is performed for one mesh. When the mesh size is partially changed in this manner, the program for the knitting pattern is returned to again and the next knitting is started.

Although a program for performing other processing is also input to the computer main body in addition to the above-mentioned program, it is not essential for implementing the present invention, and therefore description thereof will be omitted. Further, the judgment values of the variables V3 and V10 in the judgment circuit can be appropriately changed according to the knitting condition.

Effect According to the present invention, the knitting can be performed at the optimum and maximum speed according to the mesh size. As a result, work efficiency is improved and the mesh size during knitting can be changed as appropriate.Therefore, create a mesh with a small mesh each time the knitting net is finished, and use it as a mark for separating the nets. If it is used, the conventional marking operation becomes unnecessary. Further, since a servo motor having a large starting torque and excellent control characteristics is used as a drive source for both drive systems, digital control becomes possible, and the braiding machine can always be operated reliably and in the best condition.

[Brief description of drawings]

FIG. 1 is a mechanism diagram showing an outline of a knitting machine for carrying out the knitting method according to the present invention, and FIGS. 2a, 2b and 2c show the case where the mesh speed is large by controlling the rotation speed of a drive motor. Also, a graph of speed change showing an example of maintaining a high knitting speed, Fig. 3 is a partial organization chart of the fishing net showing a state in which only the mesh size is made small so that the boundary between the knitting end and the knitting start can be easily distinguished. FIG. 4 is a block diagram of the control circuit, FIG. 5 is a flow chart of the control circuit, FIGS. 6 a, b and c are graphs showing a knitting pattern, and FIG. 7 is an explanatory diagram showing the structure of a conventional knitting machine. Is. 1 ... Knitting motor, 2 ... Reduction gear mechanism, 3 ... Main shaft, 4 ... Warp supply mechanism, 5 ... Weft supply mechanism, 6 ... Loop making mechanism, 7 ... Eyelet tightening mechanism,
8 ... Feed motor, 9 ... Feed mechanism, 9a ... Feed roller, 9b ... Cam, 9c ... Swing arm, 9d ... Chain, 10 ... Motor, 10a ... Spindle, 11 …… Data setting panel, 12 …… Computer body, 13 …… Amplifier unit, 14 …… Interface, 15 …… I /
O circuit, 16 ... Pulse handle, 17 ... Judgment circuit,
18 ... Low speed braided mesh pattern program, 18 '... Automatic marking pattern programmed subprogram, 19 ... Judgment circuit, 20 ... Medium speed braided mesh pattern program, 20' ... Automatic marking Pattern-programmed subprogram, 21 ... High-speed knitting pattern program, 21 '... Automatic marking pattern programmed subprogram, A ... Warp, B ... Weft,

Claims (2)

[Claims] 1. A yarn supply mechanism, a loop making mechanism, a stitching mechanism, a feed mechanism, and a yarn feeding mechanism, a loop making mechanism, and a stitching mechanism in a knitting machine including a driving mechanism for each of these mechanisms. A knitting drive system to be driven and a feed system to drive the feed mechanism are provided separately, and the drive source in both drive systems is a servo motor, and a knitting servo motor that constantly rotates is provided during the feed process. A method for braiding a fishing net, characterized in that the rotation speeds of both servo motors are automatically controlled so that the servo motors for feed movement are rotated only during the feed operation while decelerating. 2. The method for braiding a fish net according to claim 1, wherein speed control is performed such that the rotational speed of the feed servo motor is decelerated or accelerated only when the braiding net having a predetermined length is completed.