CN111850780A - Weft yarn detecting device for loom - Google Patents
Weft yarn detecting device for loom Download PDFInfo
- Publication number
- CN111850780A CN111850780A CN202010316062.9A CN202010316062A CN111850780A CN 111850780 A CN111850780 A CN 111850780A CN 202010316062 A CN202010316062 A CN 202010316062A CN 111850780 A CN111850780 A CN 111850780A
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- China
- Prior art keywords
- cable
- weft
- main body
- detecting device
- core wire
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D51/00—Driving, starting, or stopping arrangements; Automatic stop motions
- D03D51/18—Automatic stop motions
- D03D51/34—Weft stop motions
-
- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
- D03D47/28—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein the weft itself is projected into the shed
- D03D47/30—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein the weft itself is projected into the shed by gas jet
- D03D47/3066—Control or handling of the weft at or after arrival
- D03D47/3073—Detection means therefor
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Looms (AREA)
Abstract
The invention provides a weft yarn detection device of a weaving machine, which can inhibit the bad yarn breakage caused by the separation of a soldering part of a cable core wire under the condition that the cable is stretched by an external force. A weft detecting device (20) of a loom is provided with: a sensing unit (37) that senses the arrival of a weft; a wiring substrate (38) electrically connected to the sensing unit (37); a device main body (30) which houses a wiring board (38); and a cable (31) having cable cores (41, 42) connected to the wiring board (38) by soldering sections (45, 46), and attached to a cable attachment section (40) of the device body (30). The cable (31) is taken out in a first direction (D1), and the cable core wires (41, 42) are drawn out in a second direction (D2). A cord-surrounding path (52) is formed inside the device main body (30), and the cord-surrounding path (52) is formed so as to surround the side of the mounting hole (54) opposite to the first direction (D1).
Description
Technical Field
The present invention relates to a weft detecting device for a loom.
Background
In general, a loom that performs weft insertion without using a shuttle is provided with a weft detecting device that detects the arrival of a weft. The weft detecting device is used for confirming whether the weft is normally inserted. The weft yarn detecting device is attached with a cable. The cable is used for supplying power and transmitting signals between a control circuit for controlling weft insertion operation of the loom and the weft detecting device. The cable has a predetermined number of cable cores. Patent document 1 discloses a structure in which a cable is attached to a metal case provided in a weft detecting device, a cable core wire is led out from an end portion of the cable in the metal case, and the end portion of the cable core wire is connected to a printed circuit board. Usually, the connection of the cable core to the printed circuit board is performed by soldering.
Patent document 1: japanese laid-open patent publication No. 7-11545
However, the technique described in patent document 1 has the following problems.
In a loom, when the weaving width of a woven fabric is changed, etc., the mounting position of a weft yarn detecting device is changed according to the changed weaving width. At this time, a strong tensile force may be applied to the cable of the weft detecting device by the carelessness of the operator. In this case, in the technique described in patent document 1, the cable core wire is led straight from the end portion of the cable and connected to the printed circuit board, and therefore a large load is applied to the soldered portion which becomes the connection portion thereof. As a result, the soldered portion of the cable core wire may be peeled off, which may cause a disconnection failure.
Disclosure of Invention
The present invention has been made to solve the above-described problems, and an object thereof is to provide a weft detecting device for a loom, which can suppress a thread breakage failure caused by separation of a soldered portion of a cable core when a cable is pulled by an external force.
The present invention provides a weft detecting device for a loom, which detects the arrival of a weft inserted, the weft detecting device for a loom including: a sensing unit for sensing the arrival of the weft; a wiring board electrically connected to the sensing unit; a device body that houses the wiring board and has a cable mounting portion; and a cable having a cable core wire connected to the wiring board by a soldering portion and attached to the cable attachment portion of the device body, wherein the cable is taken out from the cable attachment portion in a first direction, the cable core wire is drawn out from an end portion of the cable in the cable attachment portion in a second direction opposite to the first direction, a core wire looping path for looping the cable core wire from the cable attachment portion to the wiring board is formed inside the device body, the device body has an attachment hole for attaching the device body to a predetermined position, and the core wire looping path is formed so as to loop around the attachment hole in a side opposite to the first direction.
In the weft detecting device of a loom according to the present invention, a bulging portion for forming a path around which a core wire is looped may be formed on one side surface of the device main body.
According to the present invention, it is possible to suppress a disconnection defect caused by separation of the soldered portion of the core wire of the cable when the cable is pulled by an external force.
Drawings
Fig. 1 is a side view showing a structure of a loom according to an embodiment of the present invention.
Fig. 2 is a front view showing a main part of the loom as viewed from the direction a of fig. 1.
Fig. 3 is a schematic diagram showing an internal structure of a weft detecting device according to an embodiment of the present invention.
Fig. 4 is a schematic view showing a state in which a cable is stretched by an external force in the weft detecting device according to the embodiment of the present invention.
Description of the reference numerals
20 … weft yarn detecting device; 30 … device body; 31 … cable; 37 … sensing part; 38 … wiring substrate; 40 … cable mounts; 41. 42 … cable core; 45. 46 … braze; 52 … core winding path; 54 … mounting holes; a 58 … projection; a first direction D1 …; a second direction D2 …; y … weft insertion direction.
Detailed Description
Hereinafter, a weft detecting device for a loom according to an embodiment of the present invention will be described in detail with reference to the drawings.
Fig. 1 is a side view showing a structure of a loom according to an embodiment of the present invention, and fig. 2 is a front view showing a main part of the loom as viewed from a direction (front side of the loom) of fig. 1.
In fig. 1 and 2, a loom 1 is a loom that performs weft insertion without using a shuttle, that is, a shuttleless loom. The shuttleless loom includes a rapier loom, a gripper loom, an air jet loom, and a water jet loom, but in the present embodiment, an air jet loom is used as an example for description.
The rocker shaft 11 is rotatably supported by a frame, not shown. A batten leg 12 is attached to an upper portion of an outer peripheral surface of the rocker shaft 11. A sley 13 is fixed to an upper end of the sley leg 12. As shown in fig. 2, the sley 13 is an elongated member that is long in the weft insertion direction Y. The weft insertion direction Y is a direction in which a weft yarn moves when the weft yarn, not shown, is inserted. In the air jet loom, the weft yarn is moved in the weft insertion direction Y by the flow of air injected from a main nozzle and an auxiliary nozzle, not shown.
A holding groove 14 is formed in an upper portion of the slay 13. The holding groove 14 is formed in a trapezoidal section. A reed 15 is attached to the holding groove 14. The reed 15 is fixed to the slay 13 by a fixing block 16. As shown in fig. 1, a dent 15a for forming a weft insertion path is formed in the reed 15. The recess 15a forms a weft insertion path S in parallel with the weft insertion direction Y. In the air jet loom, the weft moves (runs) in the weft insertion direction Y along the weft insertion path S.
The slay 13 is formed with a mounting groove 17 having a T-shaped cross section. The weft detecting device 20 is attached to the slay 13 by the attachment groove 17. The mounting groove 17 is formed in the longitudinal direction of the slay 13. As shown in fig. 1, the mounting groove 17 has an opening 17 a. A nut 18 is housed in the mounting groove 17 on the inner side of the opening 17 a. The opening 17a of the mounting groove 17 has a narrower groove width than the inner portion of the mounting groove 17. The nut 18 is screwed to the bolt 23. An L-shaped plate 19 is attached to the bolt 23. The nut 18, the L-shaped plate 19, and the bolt 23 are members for attaching the weft detecting device 20 to the sley 13. Specifically, when the bolt 23 is screwed to the nut 18 and the bolt 23 is tightened, the tightening force of the bolt 23 is transmitted to the weft detecting device 20 via the L-shaped plate 19. Thereby, the weft detecting device 20 can be fixed to the slay 13. On the other hand, in a state where the bolt 23 is loosened, the weft detecting device 20 can be moved in the longitudinal direction (the left-right direction in fig. 2) of the slay 13. The adjustment of the mounting position of the weft detecting device 20 in the longitudinal direction of the slay 13 can be performed in a state where the bolts 23 are loosened.
The weft detecting device 20 detects the arrival of the weft inserted, and is disposed on the terminal side in the weft insertion direction Y. The terminal side in the weft insertion direction Y is the side opposite to the starting end side in the weft insertion direction Y where the main nozzle is arranged. As shown in fig. 2, two weft detecting devices 20 are arranged on the terminal side in the weft insertion direction Y. Of the two weft detecting devices 20, the weft detecting device 20 on the upstream side in the weft insertion direction Y (the left side in fig. 2) detects whether the leading end of the weft moving from the leading end side to the trailing end side in the weft insertion direction Y reaches a predetermined position within a predetermined time. The mounting position of the weft detecting device 20 on the upstream side is set in accordance with the weaving width of the woven fabric in the weft insertion direction Y. On the other hand, the weft detecting device 20 on the downstream side (right side in fig. 2) in the weft insertion direction Y detects the arrival of the leading end of the cut weft when the weft is cut in the middle of weft insertion. There are several types of weft detecting devices for detecting the arrival of a weft, and an optical weft detecting device will be described as an example in this embodiment.
Fig. 3 is a schematic diagram showing an internal structure of a weft detecting device according to an embodiment of the present invention. Fig. 3 shows an internal structure of the weft detecting device as viewed from the direction C of fig. 1.
As shown in fig. 3, the weft detecting device 20 includes a device main body 30 and a cable 31 attached to the device main body 30. The device main body 30 is composed of, for example, a hard resin molded body and a metal exterior plate covering a part of the outer surface of the resin molded body. The cable 31 is attached to the device main body 30 for supplying power and transmitting signals between the weft detecting device 20 and a control circuit, not shown. A lens 32 is attached to the apparatus main body 30. The lens 32 is disposed to face the weft insertion path S in the vicinity of the reed 15. A wiring board 38 is disposed inside the device main body 30 together with the light-emitting element 35 and the light-receiving element 36. The light emitting element 35 and the light receiving element 36 constitute a sensing portion 37 that senses the arrival of the weft.
Here, a principle of sensing the arrival of the weft using the light emitting element 35 and the light receiving element 36 will be described.
First, light emitted from the light emitting element 35 is condensed by the lens 32 and then irradiated to the weft insertion path S. In this state, when the leading end of the weft passes through the light irradiation position of the weft insertion path S, the light is reflected while being received by the weft. The reflected light is collected by the lens 32 and then received by the light receiving element 36. Thus, the light receiving amount of the light receiving element 36 changes before and after the leading end of the weft passes through the light irradiation position of the weft insertion passage S. That is, the amount of light received by the light receiving element 36 changes greatly at the moment when the leading end of the weft passes through the light irradiation position of the weft insertion passage S. Therefore, in the weft detecting device 20, the arrival of the weft can be sensed based on the change in the amount of light received by the light receiving element 36.
The light emitting element 35 and the light receiving element 36 are electrically connected to a wiring board 38. The wiring board 38 is formed of, for example, a printed wiring board. Wiring patterns, not shown, are formed on one or both sides of wiring substrate 38. The wiring board 38 is housed inside the apparatus main body 30. The wiring board 38 is fixed to the apparatus main body 30.
The apparatus main body 30 has a cable attachment portion 40, and the cable 31 is attached to the cable attachment portion 40. The cable 31 is taken out from the cable attachment portion 40 in the first direction D1. The first direction D1 indicates one side in the width direction (the left-right direction in fig. 3) of the weft detecting device 20. As shown in fig. 1 and 2, the cable 31 is fixed to the slay 13 by a stopper 39. The cable 31 is guided to the rocker shaft 11 via the saddle leg 12, and is electrically connected to a control circuit, not shown, via the inside of the rocker shaft 11.
As described above, the two cable cores 41 and 42 are drawn out from the end 31a of the cable 31 attached to the cable attachment portion 40 of the apparatus main body 30. The cable cores 41 and 42 are housed in the device main body 30 together with the wiring board 38. The number of the cable cores 41 and 42 can be increased or decreased as necessary. The respective cable cores 41, 42 are drawn out from the end 31a of the cable 31. The respective cable cores 41 and 42 are drawn out from the end 31a of the cable 31 in the cable attachment portion 40 in a second direction D2 opposite to the first direction D1. The cable cores 41 and 42 are electrically and mechanically connected to the wiring board 38 by soldering, respectively. That is, the end of the cable core 41 is connected to the wiring board 38 by the brazing portion 45, and the end of the cable core 42 is connected to the wiring board 38 by the brazing portion 46.
The device body 30 has two sides 48, 49. The bulge 50 is formed on one side surface 48, and the bulge 50 is not formed on the other side surface 49. The bulging portion 50 is formed in a state where the side surface 48 of the apparatus main body 30 is partially bulged outward. The bulge portion 50 is used to form a core wire looping path 52 inside the device main body 30. The core wire looping path 52 is a path for looping the cable core wires 41 and 42 from the cable attachment portion 40 to the wiring substrate 38.
In addition, the apparatus main body 30 has a mounting hole 54. The mounting hole 54 is a hole for mounting the device main body 30 to a predetermined position of the loom. The mounting hole 54 is provided between the wiring board 38 and the cable mounting portion 40 in the height direction H of the weft detecting device 20. In the present embodiment, as shown in fig. 1 and 2, the device main body 30 is attached to a predetermined position in the longitudinal direction of the slay 13 using a bolt 23. In this case, the threaded portion of the bolt 23 is inserted into the mounting groove 17 of the slay 13 through the mounting hole 54 of the device main body 30. Therefore, the mounting hole 54 is formed in a state of penetrating the apparatus main body 30. The mounting holes 54 are formed integrally with the embedded members 56. When the resin molded body constituting the device main body 30 is resin-molded, the embedded members 56 are integrated with the resin molded body by embedding at least a part of the embedded members 56 in the resin molded body.
On the other hand, the core wire looping path 52 is formed so as to bypass the second direction D2 side (the side opposite to the first direction D1) of the mounting hole 54 and the embedded member 56. A projection 58 is formed on the core wire looping path 52. When the cable 31 is pulled by an external force (described later), the protruding portion 58 protrudes so that the cable core wires 41 and 42 contact the protruding portion 58. Specifically, the protruding portion 58 is formed to protrude in the second direction D2 from the soldering portions 45 and 46 of the cable core wires 41 and 42. In addition, the protruding portion 58 is formed in a state of being bent at a right angle. The corners of the projections 58 may be chamfered or rounded. The protruding portion 58 is formed by a part of a resin molded body constituting the device main body 30, and thereby the protruding portion 58 and the device main body 30 are integrally configured. The protruding portion 58 is provided midway from the cable attachment portion 40 to the core wire looping path 52 of the wiring substrate 38.
Further, a space for forming the core wire looping path 52 and a space for accommodating the wiring board 38 are provided inside the device main body 30. These spaces are filled with resin 60. The resin 60 is attached to the device main body 30 on the wiring board 38 and the cable 31, and is filled in the space inside the device main body 30 after the cable cores 41 and 42 of the cable 31 are connected to the wiring board 38 by soldering. In the cable attachment portion 40 of the apparatus main body 30, the cable 31 is bonded to the cable attachment portion 40 with a resin 60. In addition, the peripheries of the cable cores 41 and 42 are filled with resin 60 in the core wire looping path 52 in the apparatus main body 30.
In the weft detecting device 20 configured as described above, as shown in fig. 4, an external force F1, an external force F2, or an external force F3 may be applied to the cable 31. In the following description, the external force F1, the external force F2, and the external force F3 are collectively referred to as "external force F". The case where the external force F is applied to the cable 31 refers to, for example, a case where the mounting position of the weft detecting device 20 is changed in accordance with a change in the weaving width, a case where the weft detecting device 20 is attached and detached for maintenance of the loom, and the like. In this case, a strong external force F may be applied to the cable 31 by carelessness of the operator. The external force F acts in a direction of pulling out the cable 31 from the cable attachment portion 40 of the apparatus main body 30. Therefore, when the cable 31 is pulled by the external force F, peeling may occur in the resin 60 that bonds the cable 31 to the cable attachment portion 40 due to the magnitude of the tensile force generated by the external force F. When the resin 60 is peeled off in this way, the adhesive strength of the resin 60 is lost. Therefore, when the cable 31 is pulled by the external force F, the position of the cable 31 may be shifted in the first direction D1.
When the position of the cable 31 is displaced by being pulled by the external force F, the cable core wires 41 and 42 are also pulled in the first direction D1 together with the cable 31. Therefore, in the core wire looping path 52, even at the boundary surfaces between the cable wires 41 and 42 and the resin 60, peeling may occur in the resin 60.
As a result, the positions of the cable cores 41 and 42 are shifted in the core-surrounding path 52 by peeling the resin 60. At this time, before the tensile force generated by the positional displacement of the cable cores 41, 42 is applied to the brazing portions 45, 46, as shown in the B portion of fig. 4, the cable cores 41, 42 come close to or contact the protruding portions 58 at the passing portion of the core surrounding path 52. Thereby, a part of the load applied to the brazing portions 45, 46 due to the positional deviation of the cable core wires 41, 42 is distributed to the approaching portions or the contact portions of the cable core wires 41, 42 and the protruding portions 58. Therefore, when the cable 31 is pulled by the external force F, the load applied to the soldered portions 45 and 46 of the cable core wires 41 and 42 can be reduced, and the disconnection defect caused by the separation of the soldered portions 45 and 46 can be suppressed. Further, even if there is no peeling of the cable core wires 41, 42 from the resin 60, the cable core wires 41, 42 bypass the second direction D2 side of the mounting hole 54 through the core wire looping path 52, and the load applied to the soldered portions 45, 46 can be reduced by friction between the cable core wires 41, 42 and the resin 60 generated at the bypass portion as compared with the case where there is no bypass portion.
In addition, in the present embodiment, the core wire looping path 52 is formed so as to bypass the second direction D2 side of the mounting hole 54 of the apparatus main body 30, that is, the side opposite to the first direction D1. Therefore, the size of the apparatus main body 30 can be suppressed to be small, and the protruding portion 58 can be provided in the middle of the core wire looping path 52.
In the present embodiment, a bulging portion 50 for forming a core wire looping path 52 is formed on one side surface 48 of the apparatus main body 30. Therefore, the weft detecting device 20 can be configured more compactly than in the case where the core-wire looping path 52 is formed as a separate member from the device main body 30.
Claims (2)
1. A weft detecting device for a loom, which detects the arrival of a weft inserted, comprising:
a sensing portion that senses the arrival of the weft;
a wiring board electrically connected to the sensing portion;
a device main body that houses the wiring board and has a cable mounting portion; and
a cable having a cable core wire connected to the wiring substrate by a soldering portion and attached to the cable attachment portion of the apparatus main body,
the cable is taken out from the cable mounting portion in a first direction,
the cable core wire is drawn out from an end of the cable in a second direction opposite to the first direction at the cable mounting portion,
a core wire surrounding path for surrounding the cable core wire from the cable mounting portion to the wiring substrate is formed inside the apparatus main body,
The device body has a mounting hole for mounting the device body at a predetermined position of a loom,
the core wire winding path is formed to bypass a side of the mounting hole opposite to the first direction.
2. Weft detecting device of a weaving machine according to claim 1,
a bulging portion for forming the core wire looping path is formed at one side surface of the apparatus main body.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2019-082607 | 2019-04-24 | ||
| JP2019082607A JP7183936B2 (en) | 2019-04-24 | 2019-04-24 | Weft detection device for loom |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111850780A true CN111850780A (en) | 2020-10-30 |
Family
ID=70861147
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010316062.9A Pending CN111850780A (en) | 2019-04-24 | 2020-04-21 | Weft yarn detecting device for loom |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP7183936B2 (en) |
| CN (1) | CN111850780A (en) |
| BE (1) | BE1027179B1 (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR800001668B1 (en) * | 1977-09-07 | 1980-12-31 | 이시하라 다가시 | Weft feeler |
| CN1589093A (en) * | 2004-08-13 | 2005-03-02 | 广州金升阳科技有限公司 | Method for improving fine enamelled wire spot welding strengh in spot welding |
| CN101423999A (en) * | 2007-12-17 | 2009-05-06 | 西安工程大学 | Slice type bobbin feeler for pipe |
| CN205188559U (en) * | 2015-11-25 | 2016-04-27 | 南通鲁润纺织机械有限公司 | Latitude structure is visited to air jet loom's pipeline formula photoelectricity |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6118490U (en) * | 1984-07-06 | 1986-02-03 | 松下冷機株式会社 | frost sensor |
| US5205327A (en) * | 1991-05-15 | 1993-04-27 | Sulzer Brothers Limited | Electrostatic weft detector |
| JP2649206B2 (en) * | 1993-06-23 | 1997-09-03 | 日本セレン株式会社 | Weft flight detector for shuttleless loom. |
| KR200240055Y1 (en) * | 1998-11-02 | 2001-11-22 | 허기호 | Weft Detector for Air Jet Looms |
| KR101320541B1 (en) * | 2012-03-15 | 2013-10-23 | 주식회사 금강시스템 | Weft sensing device for air jet loom |
| JP2018152482A (en) | 2017-03-14 | 2018-09-27 | オムロン株式会社 | Cable disengagement prevention structure |
-
2019
- 2019-04-24 JP JP2019082607A patent/JP7183936B2/en active Active
-
2020
- 2020-04-16 BE BE20205251A patent/BE1027179B1/en active IP Right Grant
- 2020-04-21 CN CN202010316062.9A patent/CN111850780A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR800001668B1 (en) * | 1977-09-07 | 1980-12-31 | 이시하라 다가시 | Weft feeler |
| CN1589093A (en) * | 2004-08-13 | 2005-03-02 | 广州金升阳科技有限公司 | Method for improving fine enamelled wire spot welding strengh in spot welding |
| CN101423999A (en) * | 2007-12-17 | 2009-05-06 | 西安工程大学 | Slice type bobbin feeler for pipe |
| CN205188559U (en) * | 2015-11-25 | 2016-04-27 | 南通鲁润纺织机械有限公司 | Latitude structure is visited to air jet loom's pipeline formula photoelectricity |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2020180388A (en) | 2020-11-05 |
| JP7183936B2 (en) | 2022-12-06 |
| BE1027179B1 (en) | 2021-04-27 |
| BE1027179A1 (en) | 2020-11-03 |
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