JPH0731872U - Pattern shift detection processing of weft and opening pattern of weaving machine - Google Patents

Abstract

(57) [Summary] [Purpose] The object is to enable a simple device to detect a pattern deviation between a warp opening pattern and a weft pattern. . [Structure] Between the final rotation of one cycle of the warp thread opening pattern and the first rotation of the next opening pattern, the heald frame 13B moves from the upper thread opening position to the lower thread opening position, and the action piece 14 attached thereto approaches. The output of the proximity switch 16 changes from L to H as the output from the proximity switch 16 deviates from the relative position with the switch 16. At this time, if the final rotation signal of one cycle of the weft pattern or the first rotation signal of the next cycle is output from the weft color pattern setting device 22, it is determined that the pattern deviation has not occurred. If the state of both the signals is different from this, the pattern shift detection circuit 23 outputs a pattern shift signal to stop the loom.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a pattern deviation detecting device for detecting a deviation between a weft insertion pattern of a weft and an opening pattern of a warp in a loom.

[0002]

[Prior art]

 Conventionally, the opening and closing opening of the heald frame is controlled based on a predetermined opening pattern using a dobby that sets the opening pattern with a mechanical structure setting device, and the weft thread is independently controlled based on a predetermined weft insertion pattern. When weft-inserting, the warp and the weft were controlled separately, and their relationship was not checked. There is also a dobby that sets the opening pattern with an electric setting device, but I did not check whether the heald frame was actually opened or closed according to the pattern.

[0003]

[Problems to be solved by the device]

 In this way, if the relationship between the warp opening pattern and the weft insertion pattern is not checked, the following inconveniences are rare. For example, since multiple wefts are selected by electrical signals, electrical noise intrudes into the selection system and the drive system of the actuator, causing the weft insertion pattern to change, resulting in warp opening patterns and weft There is a problem in that the pattern is misaligned and a so-called pattern shift occurs, resulting in weaving a defective fabric.

Therefore, a sensor and a memory circuit of a pattern in which a kind of weft corresponding to a signal from the sensor is set are provided for each opening lever of the dobby, and an opening lever, and thus a heald, is provided for each weft insertion. Although it is possible to detect the opening state of the frame, it is necessary to provide a sensor for the opening lever of the dobby and equip it with a memory circuit and arithmetic circuit, which complicates the device and increases the cost. It is hard to adopt.

The present invention has been made in view of the above problems, and an object of the present invention is to enable a simple device to detect a pattern deviation between a warp shed pattern and a weft pattern.

[0006]

[Means for Solving the Problems]

 For this reason, the present invention provides a plurality of heald frames that are selectively opened and closed based on a predetermined opening pattern by a dobby that sets a warp opening pattern by a setting device, and a plurality of wefts of a predetermined weft pattern setting device. In a loom with a weft inserting device that inserts wefts based on the setting, the action piece is fixed to the selected heald frame, and a sensor is attached to the machine frame side relative to the movement path of this, and switching from this sensor is performed. It is characterized by being provided with a pattern deviation detection circuit that outputs a pattern deviation signal when both signals are not output in the same weaving cycle in response to a signal and a signal for switching one cycle pattern of the weft pattern setting device. is there.

[0007]

[Action]

 According to the above construction, when the switching signal for one cycle of the weft pattern is received and the operation signal for one cycle of the heald frame is received, the opening pattern and the weft insertion pattern of the weft are normally matched. If both signals are not output at the same time, it is determined that the opening pattern and the weft insertion pattern are misaligned.

That is, one cycle of the pattern of the warp opening / closing port and one cycle of the selection pattern of the plural wefts are paired to form one cycle of the pattern pattern of the woven fabric. It was made. Specifically, the beginning of one cycle of the opening pattern and the beginning of one cycle of the weft pattern come at the same time, so if these do not come at the same time, the warp and weft patterns are misaligned. It is a judgment.

[0009]

The present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing an embodiment of the present invention.

The wefts A, B, C, D are respectively drawn out from a yarn feeder (not shown) and placed on the drums 2A, 2B, 2C, 2D of the individual weft measuring and storing devices 1A, 1B, 1C, 1D. The locking pins 4A, 4B, 4C, 4D, which are stored by winding and are pushed in and out by the electromagnetic actuators 3A, 3B, 3C, 3D on the peripheral surfaces of the drums 2A, 2B, 2C, 2D, are pushed in and out. The withdrawal is controlled by exiting. The wefts A, 1B, 1C, and 1D drawn from the weft measuring and storing devices 1A, 1B, 1C, and 1D are guided by guides 7A, 7B, 7C, and 7D that are attached to brackets 6 that are erected on the frame 5 of the loom L, respectively. After that, the weft inserting nozzles 8A, 8B, 8C, and 8D, which form a part of the weft inserting device, are respectively passed. These weft inserting nozzles are supplied with pressurized air based on a weft inserting pattern by an electromagnetic valve (not shown). 9 is a reed.

Reference numeral 10 is a dobby that mechanically sets an opening pattern, and its opening levers 11 A, 11 B, 11 C, 11 D have link mechanisms 12 A, 12 B, 12 C, 12 D or a heald frame 13 A, via a rope. It is connected to 13B, 13C and 13D.

An iron action piece 14 having an action portion 15 is detachably fixed to the upper end of the heald frame 13B. A proximity switch 16 as a sensor is arranged in opposition to the upper end position of the movement path of the action piece 14. That is, it is attached to a bracket 18 having a long hole 17 extending vertically in the frame 5 so as to be able to adjust the position in the range of the long hole 17 in the upward and downward directions. The position of the bracket 18 toward the front and rear of the loom allows screws 20 to be selectively screwed into a plurality of screw holes 19 formed on the upper surface of the frame (machine frame) 5 so that the proximity switch 16 can be relatively arranged on the selected heald frame. It is possible to combine.

The weft measuring and storing devices 1A, 1B, 1C and 1D are selectively operated by a control signal from the weft measuring and storing device controller 21. That is, the locking pins 4A, 4B, 4C, 4D are selectively inserted / removed in conjunction with the weft insertion of the selected weft, and the weft storage amount on the drums 2A, 2B, 2C, 2D is detected and detected. Wind the weft thread without any shortage. The selection of the weft is made based on the preset value of the weft pattern setting device 22.

Reference numeral 23 is a pattern deviation detection circuit, which is adapted to receive the output of the proximity switch 16 and the output of the weft pattern setting device 22. This misalignment detection circuit detects that the heald frame position is in the correct direction from the proximity switch 16 between the final one revolution of the pattern from the weft pattern setter 22 and the first one revolution of the next cycle. It is determined whether or not a detection signal indicating that the movement has occurred is output. Then, when the correct detection signal is not output from the proximity switch 16 during the period, the stop signal is output to the loom L.

Next, with reference to FIG. 3 and FIG. 4, the operation will be described by taking the case of weaving a 2/2 twill weave as an example. As shown in FIG. 4, warp yarns of a 2/2 twill fabric are controlled by at least four heald frames, and one cycle of the warp shedding pattern is completed by four rotations of the loom. On the other hand, wefts are also inserted in the order of A, B, C, D, and one cycle of the weft pattern is completed by four revolutions of the loom. Therefore, between the final one revolution of the loom of one cycle of the shed pattern and one cycle of the weft pattern to the first revolution of the first loom of the next one cycle, a predetermined heald frame, in this case, the second from the side of the reed 9 The heald frame 13B changes from the upper thread opening position to the lower thread opening position, and the weft thread changes from D to A.

Therefore, when the pattern deviation has not occurred, the heald frame 13 B moves from the upper thread opening position to the lower thread while the final signal of one cycle of the weft pattern from the weft pattern setting device 22 is input. Since it moves to the opening position, the action piece 14 that has been close to the proximity switch 16 is separated. As a result, the output of the proximity switch 16 changes from L to H. Due to the change in the output of the proximity switch 16, the pattern shift detection circuit 23 determines that the heald frame pattern and the weft insertion pattern are operating normally. On the other hand, at this time, if the output of the proximity switch 16 changes from H to L or there is no change, it is determined to be abnormal and a stop signal is output to the loom L to stop the loom. In this embodiment, if a pattern shift occurs during one cycle of the warp shedding pattern, the pattern shift cannot be detected until the final rotation of the one cycle, but the loom is certainly stopped at the end of the one cycle. Therefore, defective weaving can be detected at a relatively early point. This can minimize the damage of defective anti-weaving.

The present invention can also be applied to a device that opens and closes a heald frame with an electronic dobby that electrically sets an opening pattern. When the opening pattern is changed, the action piece may be replaced with the heald frame whose signal changes from L to H in the final rotation of the pattern, and the proximity switch may be adjusted to a position facing the action piece. Further, when the opening amount of the heald frame is changed, the position of the proximity switch 16 may be adjusted in accordance with the uppermost yarn opening position within the slot 17.

[0018]

[Effect of device]

 As described above, in the present invention, only one sensor is required, and when a pattern deviation occurs, it can be detected at an early point, so the damage due to defective anti-weaving can be minimized with an inexpensive device. There is an effect that can be.

[0019]

[Brief description of drawings]

FIG. 1 is a perspective view of an embodiment of the present invention.

FIG. 2 is a block diagram of an embodiment of the present invention.

FIG. 3 is a diagram showing the structure of the present invention.

FIG. 4 is a timing chart diagram for explaining the present invention.

[Explanation of symbols]

 1A, 1B, 1C, 1D Weft measuring and storing device 8A, 8B, 8C, 8D Weft inserting nozzle 10 Dobby 13A, 13B, 13C, 13D Held frame 14 Working piece 16 Proximity switch 22 Weft pattern setter 23 Pattern deviation detection circuit

Claims (1)

[Scope of utility model registration request] 1. A plurality of heald frames that are selectively opened and closed based on a predetermined opening pattern by a dobby that sets an opening pattern by a setting device, and a plurality of wefts are set by a predetermined weft pattern setting device. In a loom having a weft inserting device based on weft insertion, the action piece is fixed to the selected heald frame, and a sensor is attached to the machine frame side relative to the movement path of the action piece. A weft thread and shed of a weaving machine, which is provided with a pattern deviation detection circuit which outputs a pattern deviation signal when both signals are not output in the same weaving cycle in response to a one cycle pattern switching signal of the weft pattern setting device. Pattern shift detection device.