JPH0441747A - Detection of dent position for broken warp - Google Patents

Abstract

PURPOSE:To provide the title method enabling system simplification, so designed that in warp breakage, the end of the warp broken is vertically moved along dents to detect the breaking point without the need for separating the normal warps adjacent thereto, and the corresponding dent position is detected. CONSTITUTION:When warp breakage occurs during weaving, suction pipe 54 is moved between a heald 4 and reed 6 from the waiting position to the position of the warp, broken in response to a command from a weaving controller based on the position information of the weaving width direction for a falling dropper in compliance with the program set in advance. A suction airflow is then generated at the opening, turning downward, of the suction pipe 54 and the end of the warp broken on the winding side is drawn into the pipe, and the output signal as the result of its confirmation by a yarn sensor 57 is inputted into the controller, followed by moving a position sensor 70 close to the front side of the reed 6 from one of the weaving width ends to the other, thus detecting the dent position corresponding to said warp broken.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a method for specifying the position of a reed feather corresponding to a cut warp yarn when the warp yarn breaks during weaving.

[Prior technology]

When repairing cut warp yarns, it is necessary to pull the splicing yarn through the reed feathers corresponding to the cut warp yarns, so the position of the reed feathers corresponding to the cut warp yarns in the weaving width direction must be identified before pulling them through. It won't happen.

The patent applicant has obtained the invention of Japanese Patent Application No. 2-80227.
A method for detecting the position of reed feathers is proposed. The reed blade position detection method takes out a normal warp yarn that has a specific positional relationship with respect to the cut warp yarn between the heald and the reed, and displaces the normal warp yarn after taking it out in the vertical direction relative to other warp yarns. By detecting the position of the warp yarn in this displaced state in the weaving width direction, the reed feather corresponding to the cut warp yarn in a specific positional relationship is determined from the normal warp yarn.

[Issues with prior art]

However, according to the above-mentioned prior art, normal warp yarns with a specific positional relationship with respect to the cut warp yarns must be separated from other normal warp yarns, and in addition to the cut warp yarns, normal warp yarns with a specific positional relationship must be separated from each other. Since it is necessary to specify it in the width direction, the number of detection steps increases, and the detection device becomes correspondingly complex.

[Purpose of the invention]

Therefore, an object of the present invention is to specify the corresponding reed position using the cut warp itself as a clue, without using a normal warp having a specific positional relationship with respect to the cut warp.

[Solution means of the invention and its effects]

Therefore, in the present invention, when cutting the warp yarns between the sending beam and the reed, the cut warp yarns on the winding side of the cut warp yarns are taken out between the heald and the reed, and the cut warp yarns are directly directed to the reed feathers. The position of the reed wing corresponding to the cut warp is detected by displacing the warp in the vertical direction compared to the normal warp while moving the warp, and detecting the cut warp itself near the reed after this displacement.

In this way, in the present invention, since the cut warp yarns are directly detected, the detection process is not complicated, and the corresponding device can be simplified, making it easy to implement on the loom.

〔Example〕

1 to 8 show a series of steps of the method for detecting the reed position of cut warp yarns according to the present invention.

As shown in FIG. 1, during weaving, for example, one of the many warp yarns 1 is transferred from a delivery beam (not shown) to a reed 6.
When it breaks between 0 and the corresponding Dorotsuba 3 falls,
The dropper device 2 detects the cutting state of the cut warp yarns 1a, 1b, generates a warp stopping signal, and automatically stops the loom at a predetermined stopping angle. During subsequent repairs, all the heald frames 4 are leveled by a leveling device (not shown).
are set to the same level. All warp threads 1 are therefore set in a state suitable for repair, for example in a closed state. Note that the warp threads 1 are in the form of a sheet and are threaded through the healds 5 of, for example, four heald frames 4 in a predetermined repeating order, and two warp threads are threaded between each reed feather 61 of the reed 6, for example. It intertwines with the weft yarn 7 at the weaving front 81 to form the woven fabric 8.

Next, the falling droppers 3 corresponding to the cut warp yarns 1a and lb are reciprocated in the weaving width direction by, for example, a device disclosed in JP-A No. 62-69851, or by a device disclosed in JP-A-63-28951. Accordingly, the cut warp yarn 1a,
It is twisted in a direction perpendicular to Ib. As a result, the normal warp yarns 1 adjacent to the cut warp yarns 1a, 1b are separated in the direction away from the cut warp yarns 1a, lb.

Thereafter, as shown in FIG. 2, the pair of separating members 11 of the separating device enter into the small space of the separated warp yarns l near the dropper device 2, for example from below, and separate the cut warp yarns 1a and 1b from each other. By moving away in the weaving width direction, large spaces are formed on both sides of the cut warp yarns 1a and 1b. As a result, the cut warp yarns 1a and 1b are set in a state where they can be easily taken out while forming a sufficient distance from other normal warp yarns 1.

Note that the above separation device is disclosed in, for example, Japanese Patent Application Laid-Open No. 1-192853.
This is the device of the above-mentioned publication, and the separation members 11 are moved in the weaving width direction using a heald or the like, a pair of separation members 11 are raised by a vertical air cylinder, and the separation members 11 are moved in the weaving width direction by an air cylinder or the like. , the normal warp threads l are moved in the separating direction. After this, the patent application Hei 1-2
As described in Japanese Patent No. 4673, splicing threads 9 are spliced to the cut warp threads 1a on the feeding side by an adhesive or mechanical knotter, and the tips of the splicing threads 9 are connected to splicing thread holders 10 and clamp-type or suction threads. The cut warp yarns 1b are held close to the distance between the corresponding reed feathers 61 by a type holder 14.

After the above preparatory work, the control device 51 in FIG. 9 receives an operation command from a loom control device (not shown), drives the driver 52 in accordance with the operation program, and changes the amount of rotation of the feed motor 53 to the falling droplet 3. By rotating by the amount of rotation corresponding to the distance from the standby position to the position of the droopy collar 3 in the falling state based on the position information in the weaving width direction,
Between the heald frame 4 and the reed 6, the suction pipe 54 is moved from the standby position to the position of the cut warp yarns 1a, 1b and stopped. The digit 1 of the dropper 3 in the falling state can be determined by, for example, measuring the distance from one weaving end position to the falling dropper 3 using a sound wave, or by reading a unique code attached to each dropper 3. is measured by reading out the distance deso corresponding to . The suction tube 54 is
As shown in FIG. 10, the air cylinder 7 is in a non-rotating state.
1 to the slider 63, and 2 in the weaving width direction.
It moves along the book guide loft 64. Feed motor 53
The rotation is transmitted as a linear motion to the slider 63 by a pair of pulleys 65 and an annular heald 66 by a reducer 67. After the feeding movement of the suction tube 54 is completed, the control device 51 opens the solenoid valve 55 and causes the suction tube 54 to communicate with the vacuum suction means 56, thereby causing the air flow in the suction direction at the downward opening position of the suction tube 54. The end of the cut warp yarn 1b on the winding side is pulled into the suction tube 54. This pulling state is detected by, for example, a photoelectric yarn sensor 57 inside the suction tube 54, and the control 'a' device 51
is given as a confirmation signal of the pull-in state. Note that, as shown in FIG. 11, the cut warp threads 1b in the retracted state enter the inverted V-shaped positioning slit 58 formed on the diameter line of the lower end portion of the suction tube 54, and are positioned approximately at the center of the pipe. It becomes. So, the system? il device 5
1 operates a pair of solenoids 59 provided at the lower end portion of the suction pipe 54 by a driver 74, and the suction pipe 54
After frictionally holding the cut warp threads 1b in a positioned state inside the machine by a pair of clampers 60, the switching valve 62 is operated to operate the air cylinder 71 by the pressurized air source 75.
As a result, the supported suction tube 54 is moved in a vertical direction, for example, upward, while being prevented from rotating around the air cylinder 71.

In this way, as shown in FIG. 3, the cut warp yarns 1b are guided between the corresponding reed feathers 61 and moved upward, displaced to a higher position than other normal warp yarns 1, and are placed in the weaving front. 81
The positioning slit 58 is stretched in a straight line with excessive tension.

Next, the control device I51 in FIG. 9 uses the drive command to
By starting the driver 68 and rotating the feed motor 69, the position sensor 70 near the front side of the reed 6 is moved in the weaving width direction from one weaving end to the other weaving end, as shown in FIG. The position sensor 70 detects the cut warp yarn 1b in a displaced state. The drive command also serves as a count start command for the counter 73 at the same time. During this movement, the shaft encoder 7 connected to the feed motor 69
2 generates a pulse and sends it to the counter 73. As shown in FIG. 12, the position sensor 70 is attached to the tip of the holder plate 28, which is prevented from rotating by the guide bar 27 with respect to the tip of the piston rod 26 of the cylinder 25. The cylinder 25 is operated by a guide rod 23 in the weaving width direction and a feed screw 24.
It can be moved in the weaving width direction by a feed motor 69 together with a slider 29 that also serves as a feed nand.

During this movement process, the position sensor 70 detects the presence of the cut warp yarn 1b when it faces it and generates a detection signal, so the control device 51, upon receiving the detection signal,
Stop the feed motor 69. This detection signal also serves as a count stop instruction for the counter 73. counter 7
3 counts the number of pulses corresponding to the distance from the standby position of the position sensor 70, that is, the origin position, to the cut warp yarn 1b after stopping counting, and sends the distance information to the control device 51. In this way, the position sensor 70 starts cutting. Warp thread 1b
At the time when the position sensor 70 detects, the stop position of the position sensor 70 is the position between the cut warp yarn 1b and the corresponding reed feather 61, and the standby position, that is, the pulse from the origin position of the position sensor 70 to the stop position of the position sensor 70 The count value is a distance for specifying the distance between the reed feathers 61 corresponding to the cut warp yarns 1b from the origin position.

This stop position or distance information is then used as data for positioning the threading unit 31.

As shown in FIG. 12, when the threading unit 31 is integrally attached to the feed nut slider 29 with a bracket 30 and the threading needle 32 is not displaced from the position sensor 70 in the weaving width direction, the position sensor The stop position 70 becomes the operating position of the threading unit 31 as it is. Therefore, as shown in FIGS. 4 to 6, the threading unit 31 moves the threading needle 32 in the direction of the reed 6 to pass the thread between the cut warp threads 1b and the corresponding reed feathers 61. Pass the threading needle 32 through the thread guide hole of the heddle 5 corresponding to the cut warp thread 1b, and then thread the splicing thread 9 with the hook at the tip.
hook and retreat. As a result, the splicing thread 9 becomes
It is drawn between the threading holes of the heald 5 and the corresponding reed feathers 61, and is drawn to the weaving front 81. The heald 5 corresponding to the cut warp yarn 1b is positioned by a positioning device (not shown) so that the threading hole of the heald 5 is aligned with the space between the cut warp yarn 1b and the corresponding reed feather 61 in the weaving width direction. . This positioning device moves in the weaving width direction based on distance information from the control device 51, and positions the heald 5 at the position after the movement. In the process of the threading needle 32 drawing in the joining thread 9, the joining thread 9 is cut by the cutter 34 near the joining thread holder 0. After this, the piecing yarn 9 is held by the weaver near the front 81 or, as shown in FIGS. 7 and 8, by a suitable ramp-type holder or suction-type yarn holder 33. in a retained state,
The state is set so that weaving can be resumed. Before restarting weaving, the separating member 11, suction tube 54, etc. stop operating and return to the standby position. By the subsequent weaving, the splicing yarn 9 is woven into the structure of the woven fabric 8 and cut to an appropriate length.

Note that when the threading needle 32 is provided at an offset distance from the position sensor 70 in the weaving width direction, the control device 51 controls the feed motor when the position sensor 70 detects the cut warp yarn 1b. 69 is further rotated by an amount corresponding to the offset distance, thereby moving the threading needle 32 to the middle portion of the reed feather 61 corresponding to the cut warp yarn 1b.

Further, as shown in FIG. 13, when the threading unit 32 is provided by a feeding means separate from the position sensor 70, the control device 51 cuts the warp threads from the origin position of the position sensor 70 via the driver 87. A rotation amount corresponding to the distance to the detection position of 1b is given as a rotation command to the feed motor 82 of the feed guide means. The feed motor 82 is a reducer 88
The threading unit 31 is moved in the weaving width direction along the guide rod 85 by rotating the pair of pulleys 83 at both weave ends and the annular heald 84 wound around the pulleys 83 at both ends of the weave. The threading needle 32 is moved between the warp threads 1b and the corresponding reed feathers 61. Thereafter, the threading unit 31 advances and retreats the threading needle 32 to pass the piecing thread 9 between the heald 5 and the reed feathers 61 in the same manner as described above, and pull it close to the front 810.

[Other Examples]

Note that in the above embodiment, the pair of clampers 60 are connected to the suction pipe 54.
However, these pairs of clampers 6
0 may be attached to the outside of the suction tube 54 and provided so that it can be moved vertically independently by a dedicated air cylinder. In this case, after the suction tube 54 suctions the cut warp yarn 1b, the pair of clampers 60 grips the cut warp yarn 1b,
It will be displaced in the vertical direction. Also, clamper 60
The cut warp yarns 1b may be suctioned and displaced only by the suction tube 54 without providing the suction tube 54.

Even if the weaving width position of the cut warp yarns 1b is not accurately specified during the suction process, the suction tube 54 has a function of drawing the cut warp yarns 1b into the interior during movement. Therefore, the position of the dropper 3 in the falling state can be applied as information for moving the suction tube 54 in the weaving width direction. However, when the capturing means for the cut warp yarns 1b is not the suction tube 54 but consists of only a pair of clampers 60, these pair of clampers 60 are required to accurately move to the position in advance in order to directly grip the cut warp yarns 1b. Must be guided. Therefore, in this case, more accurate position information than the position information of the dropper 3 in the fallen state from the dropper device 2 is required. It is preferable to directly detect locations where the distance is large using a sensor and use this as position information.

〔Effect of the invention〕

In the present invention, the cut warp yarns are directly displaced in the vertical direction along the reeds, and by detecting the cut warp yarns themselves in the displaced state, the distance between the reed feathers corresponding to the cut warp yarns is identified. Processes such as separating other normal warp threads that match and identifying the correspondence between normal warp threads and cut warp threads are not required, and the position detection process is simplified, so the control and feeding operation parts are simplified. can be converted into

[Brief explanation of drawings]

Figures 1 to 8 are explanatory diagrams of the reed blade position detection process of the present invention, Figure 9 is a block diagram of the control system, Figure 10 is a slope view of the guide section of the suction pipe, and Figure 11 is the suction pipe Vertical section of
FIG. 12 is a perspective view of the position sensor and the guide portion of the threading unit 7), and FIG. 13 is a perspective view of the other guide portion of the threading unit. 1... Warp thread, 1a, 1b... Cutting warp thread, 2... Dropper device, 5... Heald, 6... Reed, 61... Reed feather, 8
... Woven fabric, 81... Before weaving, 31... Threading unit,
32... Threading needle, 51... Control device, 54...
Suction pipe, 58... Positioning slit, 60... Clamper, 69... Feed motor, 70... Position sensor, 73...
counter. Figure 2 Figure 7 Figure 72 Figure 77 Figure 73

Claims (1)

[Claims] Among the cut warp threads, the cut warp threads on the winding side are taken out between the heald and the reed, the cut warp threads are displaced in the vertical direction along the reed feathers relative to the normal warp threads, and the cut warp threads themselves after this displacement are detected. 1. A method for detecting the position of a reed blade of a cut warp yarn, characterized in that the position of the reed blade corresponding to the cut warp yarn is detected.