JPH0335423B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method and a device for checking whether the tightening mechanism in a net making machine for manufacturing fishing nets etc. is working normally.

(Prior art) The eye tightening mechanism in a net making machine is composed of an arm, a eye tightening roll attached to the tip of the arm, and a cam wheel that further pushes down the eye tightening roll downward at the bottom dead center of the eye tightening roll. It is driven in order to tighten and fix knots formed by entwining the warp and weft threads with a winding hook so that they do not loosen, and in relation to the length of the warp threads to be fed and the length of the knotted mesh feed.
In particular, if the unwinding length of the warp yarn is too long, even if the tightening process is performed by pushing down the tightening roll downward with the cam wheel, the tension will not be applied to the knots and the tightening of the knots will not be fixed, making it difficult to finish the finishing process. Even if it's over,
The knots are not tight, resulting in a so-called mesh misalignment, resulting in a defective product. Also, if the length of the warp threads is short, too much tension may be applied to the knots during the tightening process using the cam wheel, resulting in thread breakage, or the lever-related parts of each part of the net making machine may be strained. The disadvantage is that the forces applied thereby lead to damage to the machine.

In order to check the tightening mechanism, a skilled worker constantly inspects the operating state of the machine and checks the condition of the knitted net fabric, or the machine stops due to thread breakage to check the cause. However, there was no way to check them. Particularly when the length of the warp yarns is long, a large number of the painstakingly knitted nets are wasted, resulting in an extremely large loss both economically and in terms of labor.

(Object of the Invention) The present invention has been made to eliminate these drawbacks, and its purpose is to provide a method for checking the operating condition so that knot tightening in a net making machine is always performed in a stable state. It is an object of the present invention to provide a method and device for checking a tightening mechanism.

(Structure of the Invention) One method of the present invention to achieve the above object is to detect the rising position of the eye tightening roll at three points: normal, too high, or too low. A method for checking a tightening mechanism in a net making machine, characterized in that the drive of the net making machine is immediately stopped when a position other than the normal position is detected, and the method is directly engaged in tightening the tightening mechanism. By detecting the state of the eye tightening roll in the raised position, it is possible to check whether it is going up too much or down too much, and it is checked to ensure that it is always operating in a normal state. One device of the present invention has three switch operating members provided on a shaft to which an arm having an eye tightening roll is attached, and checks the position state of the eye tightening roll in correspondence with each switch operating member.
The switches are arranged in parallel, and are arranged so that the switch operating member and the switch come into contact when the eye tightening roll is raised, and whether the switches are in a normal position when the eye tightening roll is raised. Alternatively, the switch operating member is installed with the switch operating member shifted within a predetermined angular range so that any or all of the switches are turned on at either the too high or the too low position. A checking device for a tightening mechanism in a netting machine, the device comprising:
The raised position of the eye tightening roll is detected using three switch operating members and three switches. This makes it possible to detect excess netting and, in the event of an abnormality, quickly stop the drive of the net-making machine to stop knitting defective net fabrics and to eliminate damage to the device.

(Example) Next, the present invention will be explained in more detail with reference to the illustrated embodiment. Reference numeral 1 denotes a long eye-tightening roll, and the eye-tightening roll is supported by the tips of a plurality of arms 2 at both ends and the middle part thereof. The base of the arm is fixed to the shaft 3. A cam ring 4 is disposed at both ends of the eye tightening roll 1 and on the outside of the arm 2, and a cam member 5 is formed protruding from the outer peripheral surface of the cam ring. Therefore, the eye tightening mechanism in the net making machine includes the eye tightening roll 1, the arm 2, and the cam wheel 4 having the cam member 5.
It is made up of. In addition, 6 is a warp thread, 7 is a warp supply roll, 8 is a guide roll, 9 is a weft thread, 10
is a knitted net fabric.

In such a tightening mechanism for a net making machine, three switch operating members 11, 12, and 13 are attached to a shaft 3 to which an arm 2 is attached. These switch operation members have approximately the same shape, and include the first switch operation member 11, the second switch operation member 12, and the third switch operation member.
The switch operating member 13 is mounted at a position slightly shifted within a predetermined angular range in its mounted state. The angular range of this shift will be described later.

Three switches 14, 15, 16 are arranged in parallel in correspondence with the switch operating members 11, 12, 13, and the switch operating member and the switch are in contact with each other at the position where the tightening roll 1 is raised. It is provided in And the first switch 14
When the first switch 14 and the second switch 15 are turned on, the eye tightening roll 1 is in the proper raised position, and when only the first switch 14 is turned on, it is too low and the first, second and third switches 14 are turned on. ~ When all 16 are turned on, it is too high, and the angle range is set by actually driving the machine, detecting each state, and shifting each switch little by little to either turn on or not turn on at those positions. Switch operation members 11 to 13
Position and install. In addition, a roller is attached to the tip of each switch to operate the switch operation member 11.
~13 It is made easy to climb onto.

Next, referring to FIGS. 3A to 3C, three states of the eye tightening roll in the raised position, ie, the normal position, too low and too high, will be described. First, in Fig. A, the eye tightening roll has risen to the normal position, and the first switch 14 and the second switch 15 are operated by the switch operating members 11 and 12, respectively, and are in the on state. . This is because when the eye tightening roll 1 rises, first the first switch 14 is turned on by the first switch operating member 11, and then the second switch 15 is turned on by the second switch operating member 12. Turns on. The time run during this time is approximately 0.2 seconds, and when both switches are turned on, it means that the net has risen to the normal position, and the net making machine continues to be driven.

If the unwinding length of the warp threads 6 is long, even if the tightening roll 1 is swung down and reaches the bottom dead center, there is still some slack in the warp threads, and the cam wheel 6 is Even if the cam member 5 rotates and pushes the tightening roll 1 further downward, the knot cannot be tightened because of the above-mentioned leeway. In this state, in the next tying process, the warp threads 6 are pulled out by a lower hook (not shown), which causes the tightening roll 1 to rise, but because the warp threads 6 are long, they do not rise to the normal position. I won't. In other words, the state shown in FIG. 3B is reached. In this figure B, only the first switch operating member 11 turns on the first switch 14, and the second switch does not turn on even after a certain time run. Therefore, since the second switch is not turned on, the drive of the net making machine stops at that position, and the warp yarn 6 is pulled out by the lower hook, and the net making machine stops in a state where it is on the verge of being removed from the lower hook. By visually observing the condition, it can be confirmed that the tightening roll has descended too much, and it can be seen that the length of the warp threads being paid out is long and the knots are not tightened sufficiently.

On the other hand, if the unwinding length of the warp threads is short, the tightening roll 1 will rise more than necessary when the warp threads 6 are pulled out with the lower hook, and as shown in Figure C, all the switches 14-
16 is pressed by the switch operating members 11-13. The third switch is a normally closed switch, unlike the other first and second switches,
When the switch operating member 13 is pressed, the drive circuit of the net making machine is turned off. Therefore, the first switch 14 is turned on, followed by the second switch 15, but the third switch 16 is turned on.
When is pressed, the net making machine stops immediately. In this state, the first switch 14 and the second switch 15 are also turned on, so that the net making machine continues to be driven for a short time, and stops at the moment when the warp is removed from the lower hook due to inertia. Therefore, by looking at this state, it is possible to confirm whether the tightening roll has risen too much, and the amount of warp threads being let out is small, thereby preventing yarn breakage or machine damage during the tightening process. By this stop, the driving of the cam wheel 4 is also stopped, and therefore the cam member 5 is stopped before the tightening roll is pressed down, that is, the knot tightening process is not performed.

(Effects of the Invention) As explained above, the method of checking the eye tightening mechanism according to the present invention, when the eye tightening roll directly engaged in nodule tightening is in the raised position, determines whether the position is normal or the eye tightening mechanism has risen too much. If a position other than the normal position is detected, there is an abnormality in the unwinding length of the warp, and the knot cannot be tightened or the knot is too tightly tightened. This can lead to yarn breakage or damage to the equipment, and the drive of the net-making machine is immediately stopped when this abnormality is detected.This prevents the knitting of defective net fabric, and also prevents unreasonable eyes from being knitted. This has the excellent effect that thread breakage and device damage due to tightening force do not occur at all.

Further, in the device of the present invention, three switch operating members are provided on the shaft to which the eye tightening roll is attached via an arm, and the three switches are arranged in parallel by corresponding to the switch operating members. and the three switch operating members are shifted within a predetermined angular range, thereby checking whether the eye tightening roll is in the normal position when raised, or whether it is rising too high or descending too much, By providing the switch operating member on the shaft on which the eye tightening roll is attached, the raised position of the eye tightening roll can be detected extremely easily and accurately, and the mounting position of the switch operating member can be shifted within a predetermined angular range. By arranging the device, it is possible to accurately detect one normal position and two abnormal positions, and similarly to the above, it is possible to prevent damage to the defective knitted fabric and the device. It has excellent effects.

[Brief explanation of the drawing]

FIG. 1 schematically shows the tightening mechanism in a net making machine, and is a side view with the checking device of the present invention attached, FIG. 2 is an enlarged view of the checking device seen from the back side, and FIG. Figures A, B, and C show the relationship between each switch operation member and each switch of the same check device. Figure A is a side view when the eye tightening roll is in the normal raised position, and Figure B is a side view of the eye tightening roll. Figure C is a side view when the roll has risen but is in a position where it has fallen too far; Figure C is a side view when the tightening roll has risen and is in a position where it has gone too far. 1...Tightening roll, 2...Arm, 3...Axis,
4...Cam ring, 5...Cam member, 6...Warp thread, 9
...Weft, 10... Net fabric, 11, 12, 13...
Switch operation members, 14, 15, 16...switch.

Claims (1)

[Claims] 1. The rising position of the tightening roll is detected at three points: normal, too high, or too low, and when a position other than the normal position is detected, the net making machine is driven. A method for checking a tightening mechanism in a net making machine, characterized in that the method immediately stops the tightening mechanism. 2. Three switch operating members are provided on the shaft to which the arm having the eye tightening roll is attached, and three switches for checking the position state of the eye tightening roll are provided in parallel in correspondence with the switch operating members, respectively. , disposed so that the switch operating member and the switch are in contact with each other when the eye tightening roll is raised;
The arrangement is such that when the eye tightening roll is in its normal position when it is in an ascending state, or when it is too far up or too far down, the switch operating member is turned on so that one or all of the switches are turned on. A check device for a tightening mechanism in a net making machine, characterized in that the device is installed in a state shifted within a predetermined angular range.