JPH1018147A - Obstacle detecting apparatus in weaving machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To deal with workability and the intrusion of an obstacle in a weaving machine by properly using a detector and a cover. SOLUTION: A cover 24 comprises a stationary part 241 fixed to a side frame 25 of a weaving machine and an opening and closing part 242. A projector 27 is fixed to the inside of the stationary part 241 and the light projecting route of the projector 27 is above a cloth fell W1 of a woven fabric W and faces in the direction of weft inserting. A light projecting route screening piece 243 is attached to the under surface of the opening and closing part 242. The movement track of the light projecting route screening piece 243 following the opening and closing of the opening and closing part 242 around a hinge 26 is crossed to the light projecting route of the projector 27.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an obstacle detecting device in a loom.

[0002]

2. Description of the Related Art An apparatus of this kind is disclosed in Japanese Utility Model Laid-Open No. 60-12238.
No. 9, JP-A-63-195587, JP-A-6-195587.
No.-6472. In the devices disclosed in these conventional publications, a detector for detecting a foreign substance that has invaded above the cloth fell is provided. When the detector detects intrusion of foreign matter,
The operation of the loom stops.

In the apparatus disclosed in Japanese Utility Model Laid-Open Publication No. Sho 61-150884, the rotating portion of the weft length measuring and storing device is covered with an openable and closable cover.

[0004]

In the method of detecting the intrusion of foreign matter by the detector, the operation is not stopped when the foreign matter intrudes out of the detection range of the detector. Therefore, it is ideal to widen the detection range of the detector without any gap. For this purpose, it is necessary to increase the number of detectors, which is disadvantageous in terms of cost.

[0005] In the system using a cover for preventing foreign matter from entering, it is difficult to design in consideration of a covering range so as not to impair workability in a loom as compared with a detector, and it is difficult to use a cover for all. .

SUMMARY OF THE INVENTION It is an object of the present invention to use a detector and a cover properly to cope with workability and intrusion of obstacles in a loom.

[0007]

According to the first aspect of the present invention, an obstacle detecting means for detecting the presence or absence of an obstacle, a covering means for preventing entry of an obstacle, and at least a part of the covering means are provided. Open / close switching means for switching between a covering position and an open position, and detection state defining means for setting the obstacle detecting means to a detection state of an obstacle in an uncovered state in which at least a part of the covering means is removed from the covering position. An obstacle detection device is provided, wherein at least a part of the detection range of the obstacle detection means is outside the coverage of the covering means.

When at least a part of the covering means is removed from the covering position, the detecting state defining means sets the obstacle detecting means to the detecting state of the presence of the obstacle. This state is the same as the state in which the presence of an obstacle is detected, and the uncovered state in the covering means means prediction of the intrusion of an obstacle from the portion of the covering means in the uncovered state. At least a part of the detection range of the obstacle detection unit extends to an area that is not covered by the covering unit. The workability in this area may be better than the case where the covering means is provided.

According to a second aspect of the present invention, a photoelectric sensor is adopted as the obstacle detecting means, and a light emitting path blocking means for blocking a light emitting path of the photoelectric sensor when at least a part of the covering means is removed from a covering position. Was adopted as the detection state defining means.

When at least a part of the covering means is removed from the covering position, the light projecting path blocking means blocks the light projecting path of the photoelectric sensor. The light-projecting path cutoff state is the same state as the state in which the presence of an obstacle is detected.

According to a third aspect of the present invention, a photoelectric sensor is adopted as the obstacle detecting means, and the light projecting path of the photoelectric sensor is changed when at least a part of the covering means is removed from the covering position. The means was adopted as the detection state defining means.

When at least part of the covering means is removed from the covering position, the light projecting path changing means changes the light projecting path of the photoelectric sensor. This light-emission path change state is the same state as the state where the presence of an obstacle is detected.

According to a fourth aspect of the present invention, a changeover switch that switches between an ON state in which the obstacle detection means is activated and an OFF state in which the obstacle detection means is deactivated is employed as the detection state defining means. When at least a part of the covering means is removed from the covering position, the changeover switch is turned off, and this off state is made the same as the detection state of the presence of an obstacle.

When at least a part of the covering means is removed from the covering position, the changeover switch is turned off. This OFF state is the same state as the state where the presence of an obstacle is detected.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment in which the present invention is embodied in a jet loom will be described below with reference to FIGS.

The weft Y is injected into the opening of the warp T by the air jetting action of the main nozzle 11 for weft insertion on the slay 10. The weft Y injected into the warp shedding is guided in the weft insertion passage 121 of the modified reed 12. Weft Y inserted
Is cut and separated from the weft insertion main nozzle 11 by the electromagnetic cutter 21 for each beating. At the weft insertion end side, a weft detector 22 for detecting whether or not the weft Y has arrived is provided. When the weft detector 21 detects the arrival of the weft Y, weaving is continued. When the weft detector 21 detects that the weft Y has not arrived, weaving is stopped. The woven fabric W is guided to the take-up side of the woven fabric while being subjected to the woven shrinkage preventing action of the left and right temple devices 13 and 14 for preventing the woven fabric from shrinking.

A blow nozzle 15 is installed directly below the weft insertion main nozzle 11, and a weft introduction duct 16 is installed just above the main nozzle 11 to oppose it. A suction nozzle 17 is provided behind the outlet of the weft introduction duct 16, and the outlet side of the suction nozzle 17 faces a dust box (not shown). Main nozzle 11 for weft insertion, blow nozzle 1
5. The weft introduction duct 16 and the suction nozzle 17 are all mounted on the slay 10, and swing together with the swing of the slay. Each of these members 11, 15, 16, 1
A weft take-up motor 18 is provided behind the swing region 7 and an air cylinder 19 is provided above the motor 18. The weft take-up motor 18 has a drive roller 181
Are operatively connected, and a driven roller 191 is attached to a drive rod of the air cylinder 19. The driven roller 191 is pressed against the driving roller 181 by the projecting operation of the air cylinder 35. A weft detector 20 is attached to a drive rod of the air cylinder 18. The weft detector 20, which constitutes the weft processing device together with the blow nozzle 15, the weft introduction duct 16, the suction nozzle 17, the weft take-up motor 18 and the air cylinder 19,
And a suction range between the suction nozzle 17.

When the weft detector 21 detects that the weft Y has not arrived, the weft following the weft Y is blown into the weft introduction duct 16 by the blowing action of the blow nozzle 15 while being connected to the weft Y. The succeeding weft blown into the weft introduction duct 16 reaches the inside of the suction nozzle 17. When the weft detector 20 detects the subsequent weft, the air cylinder 19 moves down the driven roller 191, and the driven roller 191 presses the subsequent weft against the drive roller 181. Next, the weft take-up motor 18 operates and the drive roller 181 rotates. By this rotation, the succeeding weft is drawn to the suction nozzle 17 side. Due to the pulling tension at the time of this pulling, the following weft is fixed to the fixed blade 23 attached to the weft insertion main nozzle 11.
Cut by As the subsequent weft is taken, the miss yarn in the warp shed is drawn out from the warp shed. When the miss yarn passes through the detection range of the weft detector 20, the weft processing device returns to the original state, and weaving is resumed.

A cover 24 is provided in the vicinity of the weft processing device for performing the process of removing the wrong yarn using the succeeding weft as a clue. The cover 24 includes a fixing portion 241 mounted on the side frame 25 of the loom, and an opening / closing portion 242 connected to the fixing portion 241 via the hinge 26. The light projector 27 is attached to the inner surface of the fixing part 241.
A fixed cover 29 is supported on a temple bar 28 that supports the temple device 14 at the weft insertion end side so that the mounting position can be adjusted.
0 is attached. The light projecting path of the light projector 27 constituting the obstacle detecting means is oriented in the weft insertion direction above the cloth fell W1 of the woven fabric W, and the light projected from the light projector 27 is received by the light receiver 30 constituting the obstacle detecting means. Is received by the

On the lower surface of the opening / closing portion 242, the light emitting path blocking piece 2 is provided.
43 is attached. The movement trajectory of the light-projecting path blocking piece 243 associated with the opening and closing of the opening / closing section 242 about the hinge 26 intersects with the light-projecting path of the light projector 27. The light receiver 30 is signal-connected to the operation control circuit 31. The light receiver 30 converts the received light into an electric signal and outputs the electric signal to the operation control circuit 31. When the output of the electric signal from the light receiver 30 stops, the operation control circuit 31 prohibits the operation of the loom.

In the first embodiment, the following effects can be obtained. (1-1) The above-described weft processing device automatically removes a wrong yarn in response to occurrence of a weft insertion mistake, but this removal process may fail. In such a case, the operator opens the opening / closing part 242 of the cover 24 and performs the process of removing the miss thread. In some cases, it is necessary to remove the weft drawn into the weft processing device, but the weft processing device is out of the detection range of the obstacle detecting means including the light projector 27 and the light receiver 30. If the opening / closing part 242 is moved and arranged from the covering position in FIG. 2A to the opening position in FIG. 2B, the light projecting path blocking piece 243 serving as a light projecting path blocking unit blocks the light projecting path of the light projector 27. The state in which the opening / closing part 242 is arranged at the open position is the same as the state in which the presence of an obstacle is detected, and
The uncovered state in the above means prediction of intrusion of an obstacle from the opening / closing unit 242 in the uncovered state. When the opening / closing section 242 is located at the open position, the output of the electric signal from the light receiver 30 is reliably stopped, and the restart of the operation of the loom is reliably prevented.

The detection range of the obstacle detecting means consisting of the light projecting device 27 and the light receiving device 30 covers an area above the cloth fell W1 between the cover 24 and the fixed cover 29, which is not covered by the covering means. The workability in this region (for example, the workability of splicing at the time of warp breakage) may be better than the case where the covering means is provided. (1-2) The configuration in which the light projecting path of the light projector 27 is blocked by the light projecting path blocking piece 243 with the opening operation of the opening / closing section 242 is as follows.
It is extremely simple in prohibiting the operation of the loom. (1-3) When fly wool accumulates in the vicinity of the weft insertion main nozzle 11, the fly cotton adheres to the weft yarn Y introduced into the weft insertion main nozzle 11, and the nozzle is easily clogged. Further, if fly waste adheres to the light projector 27, the detection performance of the obstacle detecting means is reduced. The cover 24 prevents the accumulation and adhesion of such fly waste.

Next, a second embodiment shown in FIG. 3 will be described. The same components as those in the first embodiment are denoted by the same reference numerals. In this embodiment, a light projector 27 is attached to the inner surface of the opening / closing section 242. When the opening / closing part 242 is arranged from the covering position indicated by the solid line to the open position indicated by the chain line, the light projection path of the light projector 27 deviates from the original path. This light-emission path change state is the same state as the state where the presence of an obstacle is detected. The second opening / closing section 242 itself serves as a light emitting path changing unit.
In this embodiment, the same effect as in the first embodiment can be obtained.

Next, a third embodiment of FIG. 4 will be described. The same components as those in the first embodiment are denoted by the same reference numerals. In this embodiment, a limit switch type changeover switch 32 is accommodated in the cover 24.
When the changeover switch 32 is in the ON state, the projector 27
Is in an operation state of projecting light, and the changeover switch 32
Is OFF, the projector 27 is in a non-operating state in which no light is projected. When the cover 24 is at the position indicated by the solid line, the contact piece 244 is separated from the changeover switch 32, and the changeover switch 32 is in the ON state. When the cover 24 is disposed from the covering position to the open position of the chain line, the contact piece 244 fixed to the opening / closing portion 242 comes into contact with the changeover switch 32 to turn off the changeover switch 32.
This OFF state is the same state as the state where the presence of an obstacle is detected. In this embodiment, the same effect as in the first embodiment can be obtained.

Next, a fourth embodiment shown in FIG. 5 will be described. The same components as those in the first embodiment are denoted by the same reference numerals. In this embodiment, a cover 33 is supported on the temple bar 28 at the weft insertion end side so that the mounting position can be adjusted. The cover 33 includes a fixing portion 331 attached to the temple bar 28 and an opening / closing portion 332 connected to the fixing portion 331 via the hinge 34. Fixed part 33
A light receiver 30 is attached to the inner surface of the light receiving device 1. A light-projecting path blocking piece 333 is attached to the lower surface of the opening / closing section 332. The movement trajectory of the light projecting path blocking piece 333 associated with the opening / closing of the opening / closing section 332 about the hinge 34 intersects with the light projecting path of the light projector 27.

In some cases, the inserted weft yarn breaks and is woven into the woven fabric W at the end of the weft insertion. Therefore, when weft insertion error processing is performed at the weft insertion end side, the opening / closing unit 332 is arranged from the solid line covering position to the chain line opening position. With this arrangement, the light projecting path blocking piece 333 blocks the light projecting path of the light projector 27. In this embodiment, the same effects as in the first embodiment can be obtained.

Next, a fifth embodiment shown in FIGS. 6A and 6B will be described. The same components as those in the third embodiment are denoted by the same reference numerals. In this embodiment, a bellows-type cover 35 is used. The opening / closing portion 351 of the cover 35 is switched between a covering position in FIG. 6A and an open position in FIG. 6B. The changeover switch 32 is arranged on the changeover path of the opening / closing unit 351. When the opening / closing section 351 is at the covering position, the changeover switch 32 is in the ON state, and when the opening / closing section 351 is out of the covering position, the changeover switch 32 is turned off. In this embodiment, the same effects as in the third embodiment can be obtained.

Next, a sixth embodiment of FIG. 7 will be described. The same components as those in the first embodiment are denoted by the same reference numerals. In this embodiment, the fixing portion 24 of the cover 24
A light projector 27 is mounted on the upper surface of the light emitting device 1. Opening / closing section 2
If 42 is arranged at the open position, the light projecting path of the light projector 27 is blocked. In this embodiment, the opening / closing section 242 itself serves as a light-projecting path blocking unit, and the light-transmitting path blocking piece 243 as in the first embodiment is unnecessary.

Next, a seventh embodiment of FIG. 8 will be described. The same components as those in the first embodiment are denoted by the same reference numerals. In this embodiment, the entire cover 36 is hinged 3
7, the switching position is switched between a covering position indicated by a solid line and an open position indicated by a chain line. The light projector 27 is attached to the inner surface of the cover 36. In this embodiment, the cover 36 itself serves as a light projecting path changing unit. In this embodiment, the same effects as in the second embodiment can be obtained.

[0030]

As described above in detail, according to the present invention, at least a part of the detection range of the obstacle detecting means is set outside the covering area of the covering means, and at least a part of the covering means is removed from the covering position. In the uncovered state, the obstacle detection means is set to the detection state of the presence of an obstacle, so that the obstacle detection means and the covering means are selectively used to ensure good workability in the loom and to cope with the entry of the obstacle. It has an excellent effect that it can be achieved.

[Brief description of the drawings]

FIG. 1 is a partially cutaway front view showing a first embodiment.

FIG. 2A is a perspective view of a main part showing a state where a cover is arranged at a covering position. FIG. 3B is a perspective view of a main part showing a state where the cover is arranged at an open position.

FIG. 3 is a front sectional view of a main part showing a second embodiment.

FIG. 4 is a front sectional view of a main part showing a third embodiment.

FIG. 5 is an entire front view, partially broken away, showing a fourth embodiment.

FIG. 6 shows the fifth embodiment, and FIG. 6 (a) is a main part front sectional view showing a state where a cover is arranged at a covering position. (B) is a principal part front sectional view showing a state where a cover was arranged at an open position.

FIG. 7 is a front sectional view of a main part showing a sixth embodiment;

FIG. 8 is a front sectional view of an essential part showing a seventh embodiment;

[Explanation of symbols]

24, 33, 35, 36... Cover serving as covering means, 24
2. Opening / closing portions serving as light projecting path changing means, 243, 333 ...
Light-projecting path cut-off pieces serving as light-projecting path cut-off means, 27... Light-projector forming obstacle detecting means, 30... Light-receiving element forming obstacle detecting means, 32.

Claims (4)

[Claims] 1. An obstacle detecting means for detecting the presence or absence of an obstacle, a covering means for preventing entry of an obstacle, an opening / closing switching means for switching at least a part of the covering means between a covering position and an open position, In an uncovered state in which at least a part of the covering means has been removed from the covering position, a detecting state defining means for setting the obstacle detecting means to a state of detecting an obstacle is provided. An obstacle detection device in a loom in which the portion is outside the coverage area of the covering means. 2. An obstacle detecting means is a photoelectric sensor, and a detection state defining means is a light emitting path blocking means for blocking a light emitting path of the photoelectric sensor when at least a part of the covering means is removed from a covering position. The obstacle detection device for a loom according to claim 1, wherein: 3. An obstacle detecting means is a photoelectric sensor, and a detection state defining means changes a light emitting path of the photoelectric sensor when at least a part of the covering means is removed from a covering position. The obstacle detecting device for a loom according to claim 1, which is means. 4. The detecting state defining means is a changeover switch for switching between an ON state in which the obstacle detecting means is activated and an OFF state in which the obstacle detecting means is inactivated. 2. The obstacle detecting device according to claim 1, wherein the changeover switch is turned off when a part of the loom is removed from the covering position, and the off state is set to the same state as the detection state of the presence of an obstacle.