JPH0274206A - Timing-controlled gapping machine for forming a gap in a continuous long slide fastener strip - Google Patents

Abstract

PURPOSE: To make possible to form a gap at a determined reference position accurately, by supplying a measuring value with a length of belt piece to a comparative device, providing a controllable step motor by the comparative device and by providing a taking-out device acting to a belt-piece formed the gap. CONSTITUTION: To a transfer means 7, a continuous slide fastener belt piece containing a go-stop compensating loop 9 of the belt piece 2 before a gapping device 3 for a transfer direction is provided to add a bias to the loop 9 by a preliminary load or a bias weight 8. Between loop 9 and the device 3, a measuring roller 10 to measure a length of the belt piece 2 transferred as a laid matter is arranged. The measured value by the roller 10 is supplied to an actual value setting comparator 11 of a control device as an actual value of length. Further, to the transfer means, a controllable by the comparator 11 step motor 13, and a taking-out device 12 acting the belt piece 2 formed the gap is provided. As a result, a gap can be formed at the determined reference position accurately.

Description

DETAILED DESCRIPTION OF THE INVENTION Industrial Field of Application The present invention consists of two slide fastener strip halves with which a slide fastener strip is connected and which, at the end of the manufacturing process, from which the finished slide fastener is separated and provided with a gap device having a guide passage for a continuous slide fastener strip, clamping means for securing such strip during gap formation, and a vertically reciprocatable gap tool. and a control device is provided and means for conveying the strip through the gap machine, the control device for gapping the long continuous slide fastener strip providing timing control of the gap device and the conveying means. This invention relates to a timing control gap forming machine.

The term "continuous slide fastener strip" refers to a continuously produced strip constituted by two supporting tapes and connecting elements or rows thereof attached thereto and connected to each other. Individual slide fasteners are made from such strips in the manufacturing process and are, for example, provided with a terminal end and a starting end and fitted with runners. "
The term "gap formation" refers to the steps necessary to construct regions of support tape without connecting means at the beginning and/or end of the finished slide fastener.

Prior Art In a gap machine well known from experience, which is the premise of the present invention,
The conveying means has two conveying rollers, the front roller as seen in the conveying direction is driven with a predetermined torque, while the rear roller as seen in the conveying direction has a predetermined deceleration or braking effect. so that the continuous strip is subjected to a predetermined mechanical tension in the gap device and during gap formation. This tension is relatively important in order to prevent the disadvantageous effects of deceleration effects experienced by the strip in the guide channel. In known processes, the strip is subjected to considerable stretching between the conveying rollers due to high levels of mechanical tension, and the tension is an unmanageable addition to the friction between the strip and the guide path of the gap device. is affected by. Conventionally, the length of the strip is determined after the gapping device when the strip performs a timing movement through a gapping machine, resulting in the disadvantage of considerable interference tolerances with respect to the reference position of the gap within the strip ( The spacing between gears defines the length of the final slide fastener). If the gap machine is only part of an automated production line, for example if the machine is part of a continuous production unit and the gap is used as a control mark for an assembly machine placed after the gap machine and is wide This is particularly disadvantageous if there is insufficient control due to tolerances.

OBJECTS OF THE INVENTION It is an object of the invention to improve a gap machine as mentioned in the beginning, so that gaps can be formed very accurately at predetermined reference positions depending on the exact length of the final product slide fastener. be.

DESCRIPTION OF THE INVENTION According to the invention, therefore, the conveying means has a continuous slide fastener strip leader, seen in the conveying direction, upstream of the gap device, which includes a stop-advance compensating loop for such a strip, so that the preload or The loop is biased by a bias weight, and the conveying means has a measuring roller between such loop and the gap device for measuring the length of the strip conveyed as a ride. , such a measured value of the length is fed as a length actual value to an actual value setpoint comparator of the control device, and the conveying means can be controlled by the comparator after the gap device in the conveying direction. It has a stepper motor and a take-off device that acts on the gapped strip.

It is advantageous if the preload or bias used is relatively weak. For all conventional slide fasteners used in textiles, an arrangement in which the bias weight can stretch the strip in the longitudinal direction by at most 1% and advantageously by approximately 0.5% has been found satisfactory. . In order to simplify the measurement with a dragged measuring roller and to supply the measured value to a comparator of the control unit, it is advantageous if the measuring roller is connected to an increment sensor. It is a simple matter to extract measured values from such sensors in digital or analog form. It is advantageous if the comparator is adjustable to various setpoints and is triggered electronically with respect to setpoint and actual value. For technical control, it is advantageous if the stepping motor cooperates with an associated trigger device connected to the comparator.

The gap machine according to the invention operates with great precision with respect to positioning the desired gap at a predetermined reference position. For monitoring, at least one process monitoring sensor can be arranged between the gap device and the removal device. In order to integrate the gap machine according to the invention into a production line, at least one sensor for detecting control marks on the strip is arranged between the measuring position and the gap device;
It is advantageous if the strip has such markings along it in automatic production equipment. The strip therefore has control markings in a suitable manner, for example in the form of holes. According to the invention, the gaps can be placed very precisely. Since the take-off device moves the strip according to the precise measurements made by the measuring ports as described above, uncontrolled stretching of the strip does not interfere with the positioning of the gap. Even if there is relatively high friction in the guide channel, the strip can be accurately positioned, especially since such guide channels are usually configured to operate with relatively little friction up to the gap-forming position. Ru. At least these guide channels can be configured accordingly.

Example Embodiments of the present invention will be described in detail below with reference to the drawings.

The illustrated gap machine is used to form a gap l in a long continuous slide fastener strip 2 made up of two joined strip halves.

The strip 2 is manufactured, for example, continuously somewhere else.

The gap machine operates in a timing-controlled manner, ie the strip 2 is moved in a timing-controlled manner in the conveying direction by lengths corresponding to the length of the desired finished product slide fastener.

This movement is interrupted and the strip 2 is stopped in order to be able to form the gap l very precisely and clearly, depending on the desired length of the slide fastener. The finished slide fastener is separated from the strip 2 at the end of the manufacturing process and has a protruding support tape end having a telescoping runner, a terminal end and a starting end, and without connecting elements at the starting and ending ends.

The basic structure of the gap machine includes a gap device 3 with a guide passage 4 for the strip 2, clamping means 5 for securing the gap-forming strip 2, and a vertically reciprocatable gap tool 6. . Furthermore, the gap machine has a control device having a plurality of control parts, which will be explained later, and means 7 for conveying the strip 2 through the gap machine, the control device timing-controlling the operation of the gap device 3 and the conveying means 7. do.

As can be seen by comparing FIGS. 1 and 2, the conveying means 7 has a continuous sliding fastener strip leader including a stop-advance compensating loop 9 for the strip 2 in front of the gap device 3, seen in the conveying direction. This loop 9 is biased by a preload or bias weight 8. ``Between such a loop and the gap device 30 a measuring roller IO is arranged which measures the length of the strip 2 conveyed as a ride. Actual value setpoint comparator 11 of the control device as the actual value
is supplied to Furthermore, the conveying means has, after the gap device 3 in the conveying direction, a removal device 12 which has a stepping motor 13 which can be controlled by a comparator 11 and which acts on the gapped strip.

The weight 8 is relatively weakened and is adjusted in this embodiment by the weight of a suitable floating roller. The weight is such that it stretches the strip in the longitudinal direction by at most 1% and advantageously by approximately 0.5%. The measuring roller 10 in this embodiment is connected to an incremental sensor. Comparator 11 is adjustable to various settings and is therefore electronically triggered. A similar idea is
This applies to the provision of actual values for the strip length. The stepper motor 13 is connected to an associated trigger device 14 which is acted upon by the comparator 11 .

If the gap machine according to the invention is installed in a production line, it is advantageous if the device is such that any faults are detected and do not disturb subsequent machines in the line. According to the invention, therefore, at least one sensor 15 for detecting control markings on the strip 2 is arranged between the measuring roller 10 and the gap device 30.

Control marks are formed elsewhere on the strip 2. According to the invention, at least one process monitoring sensor 16 is arranged between the gap device 3 and the removal device 120 in order to eliminate any defects that arise unexpectedly during gap formation.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic diagram of a timing-controlled gap machine according to the invention, and FIG. 2 is a side view of an actual gap machine constructed according to the schematic diagram of FIG. l... Gap, 2... Strip, 3... Gap device, 4... Guide passage, 5... Clamping means, 6...
・Gap tool, 7...Transportation means, 8...Weight, 9
...Loop, 10...Measuring roller, 11...Comparator, +2...Takeout device, 13...Step motor, 14...Trigger device, ts...Sensor, 16...
・Process monitoring sensor

Claims (7)

[Claims] (1) The slide fastener strip is composed of two slide fastener strip halves connected together, and at the end of the manufacturing process, the completed slide fastener is separated from the slide fastener strip, and the continuous slide fastener strip is A gap device having a guide passage for the strip, clamping means for securing such strip during gap formation, and a vertically reciprocatable gap tool are provided, a control device is provided, and a gap machine is provided. In a timing controlled gapping machine for forming gaps in a long continuous slide fastener strip, a means for conveying the strip through the conveying means is provided, and a controller provides timing control of the gapping device and the conveying means. directionally in front of the gap device, a continuous slide fastener strip leader including a stop-advance compensating loop for such strip, the loop being biased by a preload or bias weight, and The conveying means has, between such loop and the gap device, a measuring roller for measuring the length of the strip conveyed as a ride, and the measured value of such length is determined by the length. is supplied as an actual value to an actual value setpoint comparator of the control device, and the conveying means includes a gap-forming belt having a stepper motor which can be controlled by the comparator after the gap device in the conveying direction. A timing-controlled gap machine for forming gaps in long continuous slide fastener strips, characterized in that it has a strip-acting ejection device. 2. Machine according to claim 1, characterized in that the biasing weight is capable of longitudinally stretching the strip by at most 1% and advantageously by approximately 0.5%. 3. Machine according to claim 1 or 2, characterized in that the measuring roller is connected to an incremental sensor. 4. Machine according to claim 1, characterized in that the comparator is adjustable to different set values and is therefore electronically triggered. (5) Machine according to one of claims 1 to 4, characterized in that the stepper motor is connected to an associated triggering device connected to the comparator. 6. Machine according to claim 1, characterized in that at least one sensor for detecting control marks on the strip is arranged between the measuring position and the gap device. (7) At least one process monitoring sensor is located between the gap device and the removal device.
6. The machine according to item 6.