JP6642240B2 - Yarn detection device - Google Patents

Description

  The present invention relates to a yarn detection device that detects movement of a yarn.

  Generally, in a weaving machine that draws out and inserts wefts from a weft cheese, a spare weft cheese is continuously drawn out and used even when the wefts of a used weft cheese are consumed. For this purpose, the end of the used weft cheese is connected to the start of the spare weft cheese. After the weft of the used weft cheese is consumed, the operator replaces the new weft cheese, and the end of the spare weft cheese is connected to the start of the new weft cheese.

  By the way, if the seam between the end of the used weft cheese and the start of the spare weft cheese is woven into the fabric, the quality of the fabric is deteriorated. Therefore, the weft moves toward the weft insertion device by the traction by the weft insertion device when near the seam between the end of the used weft cheese and the start end of the spare weft cheese, and detects the movement of the weft. There is known a yarn detecting device which prevents a seam from being woven into a fabric. For example, the yarn detection device disclosed in Patent Literature 1 is installed between the end of the used weft cheese and the start of the spare weft cheese. When the weft of the used weft cheese is consumed, the weft near the joint between the used weft of the used weft cheese and the weft of the spare weft cheese is pulled by the weft insertion device, and the drawn weft is detected by the detection lever. Is rotated to detect the weft near the joint.

JP 2001-49549 A

  By the way, in the yarn detecting device described in Patent Document 1, when the worker sets the weft in the yarn detecting device again after the weft is discharged from the yarn detecting device to the outside of the yarn detecting device, the worker may perform an erroneous detection of the yarn detecting device. It is necessary to turn off the detector to prevent this. Further, after turning off the detector, it is necessary to turn the detection lever to insert the weft, and then return the detector to ON. Thus, the operation steps performed by the operator are complicated. An object of the present invention has been made in view of the above-described circumstances, and an object of the present invention is to provide a yarn detecting device with a small number of operation steps performed by an operator.

A yarn detecting device that achieves the above object is configured such that a bracket having a yarn guiding portion for guiding a yarn and a spindle fixed to the bracket are rotatable to a position where the yarn comes into contact with the yarn moving the yarn guiding portion. In a yarn detection device including a supported lever and a detector that detects a rotation position of the lever, the yarn guide portion is open at one end, and the other end of the yarn guide portion is closed. The lever is located between one end and the other end of the thread guide so as to form a standby area for the thread between the lever and the other end of the thread guide. A position, a discharge position rotated by the yarn moving from the standby area to one end side of the yarn guide section to communicate the standby area with one end side of the yarn guide section, and one end side of the yarn guide section. Rotated by the thread moving from above to the standby area Is and is rotatable between an insertion position for communicating the one end of the yarn guide section and the standby area, the initial position is located between the insertion position and the discharge position, the It has a detection surface that is detected by the detector only at the discharge position.

  According to this configuration, when the yarn moves from the standby region of the yarn to the one end of the yarn guide, that is, when the yarn is pushed by the lever when the yarn is discharged, the lever rotates about the support shaft. Then, the detector detects the detection surface of the turned lever. Thereafter, the yarn moves from one end of the yarn guide to the standby area, that is, when the yarn is pushed, the lever pushes the lever when the yarn is inserted. It is arranged in the yarn detecting device. Thereby, the worker can insert the yarn into the yarn detecting device without turning off the detector, and it is possible to reduce the number of man-hours for the operator to operate the yarn detecting device.

  The lever may return to the initial position from the ejection position and the insertion position by its own weight.

  According to such a configuration, when the yarn is separated from the lever when the yarn is inserted and when the yarn is discharged, the lever returns to the initial position by its own weight. This allows the operator to operate the yarn detection device only by inserting the yarn to the standby area, so that the number of operation steps can be reduced.

  The yarn detecting device may include a bracket cover having a yarn guide for guiding a yarn, and the lever may be disposed between the yarn guide of the bracket and the yarn guide of the bracket cover.

  According to such a configuration, the yarn moves along the yarn guide and the yarn guide when the yarn is discharged. This makes it possible to prevent the yarn from slipping off when the yarn is discharged, as compared with the case where only the yarn guide is provided.

  The thread guide portion of the bracket may include a flat plate portion disposed on a tip side of the lever, and the flat plate portion may have an opening through which the lever passes.

  According to such a configuration, when the yarn is discharged, the yarn moves along both ends of the flat plate portion with the lever interposed therebetween. This makes it possible to prevent the thread from slipping off at the time of discharging the thread with a smaller number of parts as compared with the case where the flat plate portion is not provided.

  The detector may be a lever detector having a switch that contacts the detection surface.

  According to this configuration, the detector detects the rotational position of the lever by moving the yarn from the standby region to one end of the yarn guide, that is, by contacting the detection surface of the lever with the switch when discharging the yarn. Becomes possible.

  The detector may be a photoelectric sensor having a light emitter and a light receiver.

  According to this configuration, when the yarn moves from the standby region to the one end of the yarn guide, that is, when the yarn is discharged, the detector detects the optical axis emitted from the light emitter to the light receiver by blocking the detection surface of the lever. The container detects the turning position of the lever. Thus, since the lever has no physical contact with the detector, there is no resistance that the yarn receives from the detector when the yarn is discharged, and it is possible to reduce damage to the yarn.

  According to the present invention, it is possible to provide a yarn detecting device having a small number of operation steps performed by an operator.

FIG. 2 is a schematic diagram of a yarn detecting device. (A) is a ZY top view of a yarn detecting device. (B) is an XY plan view of the yarn detecting device. (A) is an XY plan view of the yarn detecting device at the time of weft discharge. (B) is an XY plan view of the yarn detecting device when a weft is inserted. FIG. 5 is a ZY plan view of the yarn detecting device without a bracket cover. (A) is an XY plan view of a yarn detecting device in a 2nd embodiment. (B) and (c) are XY plan views of the yarn detecting device in the second embodiment. (A) is an XY plan view of the yarn detecting device at the time of weft discharge in the second embodiment. (B) is an XY plan view of the yarn detecting device at the time of inserting a weft in the second embodiment. (A) is an XY plan view of the yarn detecting device at the time of weft discharge in the third embodiment. (B) is a ZY top view of a thread detector in a 3rd embodiment.

(First embodiment)
Hereinafter, a first embodiment of a yarn detecting device will be described with reference to FIGS. In FIGS. 1 to 7, the vertical direction is defined in the Y direction, and a plane perpendicular to the Y direction is defined in the X direction and the Z direction.

  As shown in FIG. 1, a seam Yts is formed by connecting the end Y1t of the weft Y1 of the weft cheese 10 and the start Y2s of the weft Y2 of the weft cheese 11. In the illustrated example, the weft Y1 of the weft cheese 10 is pulled out and used. Between the weft cheese 10 and the weft cheese 11, a yarn detection device 12 is arranged.

  As shown in FIGS. 1 and 2A and 2B, the yarn detection device 12 includes a substantially L-shaped bracket 13, a substantially triangular lever 14 rotatably attached to the bracket 13, And a lever detector 15 as a detector attached to the bracket 13. The yarn detecting device 12 includes a rectangular parallelepiped block 16 attached to the bracket 13, and a substantially L-shaped bracket cover 17 attached to the bracket 13 via the block 16.

  The bracket 13 is made of a metal material plate such as iron or stainless steel. The bracket 13 bends the substrate portion 13a located on a plane defined by the X direction and the Y direction, and curves the substrate portion 13a so as to extend from the substrate portion 13a and be positioned on a plane defined by the X direction and the Z direction. And a mounting portion 13b formed in the above manner. The board portion 13a has a first surface 13aa to which the lever 14, the lever detector 15, and the block 16 are attached. Further, the substrate portion 13a has a second surface 13ab on the opposite side of the first surface 13aa along the Z direction. The mounting portion 13b has a first surface 13ba to which the nut 18 is welded and a second surface 13bb on the opposite side of the first surface 13ba along the Y direction, and is coaxial with the nut 18 when viewed from the Y direction. It has a screw hole 19 on the line. A hole is provided in a cheese stand (not shown) in which the weft cheese 10 and the weft cheese 11 are installed. After aligning the positions of the holes and the screw holes 19, the cheese stand and the bracket 13 are fastened with bolts. Thereby, the yarn detecting device 12 is fixed to the cheese stand.

  The lever detector 15 has a hole when viewed from the Z direction. The board portion 13a is provided with a hole coaxially with the hole of the lever detector 15 when viewed from the Z direction. The bolt 20 is screwed into the hole of the lever detector 15 and the board part 13a from the first surface 13aa side and fastened by the nut 21 provided on the second surface 13ab side, so that the lever detector 15 becomes the first surface 13aa. Attached to. The lever detector 15 is, for example, a light torque switch sensor, and includes a switch 22. The lever detector 15 detects the lever 14 when the lever 14 contacts the switch 22. The lever detector 15 can appropriately set how much pressure the lever 14 contacts the switch 22 to detect the lever 14. The lever detector 15 is electrically connected to a machine base through a wiring (not shown).

  A substantially triangular lever 14 is provided below the lever detector 15 when viewed from the Y direction. The lever 14 has a hole when viewed from the Z direction. The board portion 13a has a hole coaxially with the hole of the lever 14 when viewed from the Z direction. The bolt 23 as a support shaft is screwed into the hole of the lever 14 and the washer 24 from the first surface 13aa side. Further, the bolt 23 is screwed into the hole of the substrate portion 13a from the first surface 13aa side. The cylindrical portion of the bolt 23 is inserted into the hole of the lever 14 and the washer 24 so that the lever 14 is supported by the bracket 13 so as to be rotatable around the bolt 23. The lever 14 is attached to the first surface 13aa by fastening the screw portion of the bolt 23 to the substrate portion 13a and the nut 25 provided on the second surface 13ab side.

  As shown in FIG. 2B, the lever 14 has a thread contact surface 14a and a thread contact surface 14b that contact the weft Y12. The lever 14 has a switch contact surface 14c as a detection surface for detecting the rotational position of the lever 14 by contacting the switch 22. The lever 14 is made of a resin material such as MC nylon, and the corner of the thread contact surface 14a and the corner of the thread contact surface 14b of the lever 14 are chamfered.

  The bracket cover 17 is made of a metal material plate such as iron or stainless steel. The bracket cover 17 has a mounting portion 17a positioned on a plane defined by the X direction and the Z direction, and a mounting portion 17a extending from the mounting portion 17a and bending the mounting portion 17a so as to be positioned on a plane defined by the X direction and the Y direction. And an extension portion 17b formed as described above.

  The block 16 is made of a metal material such as iron or stainless steel. The block 16 has a hole when viewed from the Z direction. A hole is provided in the substrate portion 13a of the bracket 13 on the same axis as the hole of the block 16 when viewed from the Z direction. A hole is provided in the mounting portion 17a of the bracket cover 17 on the same axis as the hole of the block 16 when viewed from the Z direction. The bolt 26 is screwed into the hole of the block 16 and the hole of the mounting portion 17a of the bracket cover 17 from the first surface 13aa side. Further, the block 16 and the bracket cover 17 are attached to the first surface 13aa by fastening the bolt 26 to a nut 27 provided on the second surface 13ab side from the first surface 13aa side. The lever 14 rotates between the board portion 13a of the bracket 13 and the mounting portion 17a of the bracket cover 17 as viewed from the X direction.

  A thread guide groove 28 serving as a thread guide portion is provided in the board portion 13a of the bracket 13 from one end to the vicinity of the other end of the board portion 13a in substantially parallel to the X direction. At one end of the thread guide groove 28 and near one end of the substrate portion 13a, an opening 28a is formed by chamfering a corner, and one end of the thread guide groove 28 is open. The other end of the thread guide groove 28 is closed and not opened near the other end of the substrate portion 13a. A thread guide 29 that is parallel to the thread guide groove 28 when viewed from the Z direction is provided in the mounting portion 17a of the bracket cover 17. The thread guide 29 is provided substantially parallel to the X direction from one end of the mounting portion 17a. An opening 29a is formed by chamfering a corner at one end of the thread guide 29 and near one end of the attachment portion 17a, and one end of the thread guide 29 is open.

  As shown in FIG. 1, when the weft Y1 of the weft cheese 10 is pulled out and used, the weft Y12 near the seam Yts is arranged in the yarn guide groove 28. When the weft Y1 of the weft cheese 10 is consumed, the weft Y12 moves along the yarn guide groove 28 and is discharged from the yarn detection device 12. After that, as shown in FIG. 3B, the yarn detecting device 12 from which the weft Y12 has been discharged receives the weft Y23 near the joint between the end Y2t of the weft cheese 11 and the start of the new weft cheese. Be placed.

  Next, the turning position of the lever 14 will be described. As shown in FIG. 2A, the lever 14 is located between one end and the other end of the yarn guide groove 28 and the yarn guide 29 when viewed from the X direction at an initial position where the lever 14 is not in contact with the weft Y12. As a result, a standby area 30 is formed between the lever 14 and the other end of the thread guide groove 28. At the initial position, the weft Y12 is waiting in the waiting area 30.

  As shown in FIG. 3A, at the discharge position where the switch contact surface 14 c of the lever 14 is in contact with the switch 22, the weft Y 12 is moved from the standby area 30 to one end of the yarn guide groove 28 and the yarn guide 29. Has moved to. The weft Y12 comes into contact with the yarn contact surface 14a by moving from the standby area 30 to one end of the yarn guide groove 28 and the yarn guide 29, so that the lever 14 is rotated and the standby area 30 and one end of the yarn guide groove 28 Is communicated.

  As shown in FIG. 3B, at the insertion position where the switch contact surface 14c of the lever 14 is not in contact with the switch 22, the weft Y23 is moved from one end of the yarn guide groove 28 and the yarn guide 29 to the standby area 30. Has moved to. The weft Y23 comes into contact with the yarn contact surface 14b by moving from one end of the yarn guide groove 28 and the yarn guide 29 to the standby area 30, so that the lever 14 is rotated and the standby area 30 and one end of the yarn guide groove 28. Is communicated.

  Next, the operation of the present embodiment will be described together with the operation of the lever 14 when the weft Y12 is discharged and the operation of the lever 14 when the weft Y23 is inserted in the yarn detection device 12 shown in FIGS. 3 (a) and 3 (b).

  As shown in FIG. 3A, when the weft Y1 of the weft cheese 10 is completely consumed, the weft Y12 arranged in the standby area 30 is pulled by a weft insertion device (not shown), and the yarn guide groove 28 and the yarn guide. It moves from the standby area 30 to one end of the yarn guide groove 28 and the yarn guide 29 along the line 29. The weft Y12 contacts the thread contact surface 14a of the lever 14 when moving from the standby area 30 to one end of the thread guide groove 28 and the thread guide 29. The lever 14 receives the external force due to the movement of the weft Y12 and rotates clockwise U around the bolt 23 as a fulcrum when viewed from the Z direction from the broken line position to the solid line position of the lever 14. The lever 14 that rotates clockwise U contacts the switch 22 on the switch contact surface 14c. When the lever 14 comes into contact with the switch 22, the shift from the use of the weft Y1 of the weft cheese 10 to the use of the weft Y2 of the weft cheese 11 is detected. Even after the switch 22 detects the turning position of the lever 14, the weft Y12 keeps pushing the thread contact surface 14a of the lever 14. The weft Y12 passes through the gap between the lever 14 and the thread guide groove 28 and the gap between the lever 14 and the thread guide 29 and exits to the one end of the thread guide groove 28 and the thread guide 29, and is discharged from the thread detecting device 12. . When the weft Y12 is discharged from the yarn detection device 12, the lever 14 loses contact between the weft Y12 and the yarn contact surface 14a. Therefore, the lever 14 rotates counterclockwise from the solid line position to the broken line position of the lever 14 with the bolt 23 as a fulcrum when viewed from the Z direction, and returns to a position before receiving the external force due to the movement of the weft Y12. I do.

  When the weft Y1 of the weft cheese 10 is consumed, a new weft cheese (not shown) is mounted on the cheese stand instead of the weft cheese 10. The operator connects the end Y2t of the weft cheese 11 and the start of the weft of the new weft cheese.

  As shown in FIG. 3 (b), the operator moves the weft Y23 near the joint between the end Y2t of the weft cheese 11 and the start of the weft of the new weft cheese along the yarn guide groove 28 and the yarn guide 29. The thread guide groove 28 and one end of the thread guide 29 are moved to the standby area 30. At this time, the weft Y23 and the thread contact surface 14b of the lever 14 come into contact. The lever 14 receives the external force due to the movement of the weft Y23 and rotates counterclockwise V about the bolt 23 as a fulcrum when viewed from the Z direction from the broken line position of the lever 14 to the practical position. When the weft Y23 moves to the standby area 30 and loses contact with the yarn contact surface 14b, the lever 14 rotates clockwise around the bolt 23 as a fulcrum when viewed from the Z direction from the solid line position of the lever 14 to the broken line position by its own weight. Rotate to U. Then, the weft Y23 is inserted into the yarn detecting device 12 by returning the lever 14 to the position before receiving the external force due to the movement of the weft Y23.

According to the above embodiment, the following effects can be obtained.
(1) When the weft Y12 pushes the thread contact surface 14a of the lever 14 by the movement of the weft Y12 from the standby area 30 to one end of the thread guide groove 28 and the thread guide 29, the lever 14 is viewed from the Z direction. Rotate clockwise U around the bolt 23 as a fulcrum. Then, the switch contact surface 14c of the turned lever 14 comes into contact with the switch 22 of the lever detector 15. Thereafter, the yarn contact surface 14b of the lever 14 is pressed by the movement of the weft Y23 from one end of the yarn guide groove 28 and the yarn guide 29 to the standby area 30. Then, when the lever 14 is rotated counterclockwise V around the bolt 23 as viewed from the Z direction, the weft Y23 is arranged in the yarn detecting device 12.

  As a result, when the weft Y23 is inserted into the yarn detector 12, the switch contact surface 14c does not come into contact with the switch 22, so that the worker inserts the weft Y23 into the yarn detector 12 without turning off the lever detector 15. It is possible to reduce the number of operation steps of the operator.

  (2) When the weft Y12 separates from the yarn contact surface 14a and when the weft Y23 separates from the yarn contact surface 14b, the lever 14 returns to the initial position by its own weight. This allows the operator to operate the yarn detecting device 12 only by inserting the weft Y23 into the standby area 30, so that the number of operation steps can be reduced.

  (3) The lever detector 15 having the switch 22 is used as a detector for detecting the rotational position of the lever 14. Thus, when the weft Y12 is discharged, the switch contact surface 14c of the lever 14 comes into contact with the switch 22 so that the rotation position of the lever 14 can be detected.

(4) The lever 14 is arranged between the yarn guide 29 and the yarn guide groove 28 as a yarn guide. Thereby, the weft Y12 moves along the yarn guide groove 28 and the yarn guide 29 when the weft Y12 is discharged. As a comparative example, as shown in FIG. 4, in the yarn detecting device 12 without the bracket cover 17, the weft Y12 slips through between the board portion 13 a of the bracket 13 and the lever 14 when the weft Y12 is discharged, so that the lever detector 15 May not detect the rotational position of the lever 14. Therefore, as shown in FIG. 4, the weft Y12 moves along the yarn guide groove 28 and the yarn guide 29 when the weft Y12 is discharged, as compared with the case where only the yarn guide groove 28 is provided. Is prevented from slipping between the lever 14 and the board portion 13a of the bracket 13.

(Second embodiment)
Next, a second embodiment will be described with reference to FIGS. 5 (a), 5 (b) and 5 (c) and FIGS. 6 (a) and 6 (b). This embodiment is different from the first embodiment in that the bracket 13 is provided with an opening 34 through which the lever 14 passes, and other configurations are basically the same as those of the yarn detection device 12 of the first embodiment. is there.

  As shown in FIGS. 5A, 5B, and 5C, the bracket 13 has a board portion 13a located on a plane formed by the X direction and the Y direction, and a bracket portion 13a extending from the board portion 13a and extending in the X direction. And a mounting portion 13b formed by bending the substrate portion 13a so as to be located on a plane defined by the Z direction. Further, the bracket 13 has an extension portion 13c as a thread guide portion formed by bending the attachment portion 13b so as to extend on the attachment portion 13b and to be located on a plane defined by the Y direction and the Z direction. Further, the bracket 13 includes a flat plate portion 13d as a thread guide portion, which is extended from the extension portion 13c and is curved toward the distal end 14e of the lever 14 when the extension portion 13c is viewed from the Z direction.

  An end 32 as a thread guide is provided on the substrate 13a of the bracket 13. The end 32 is provided substantially parallel to the X direction from one end of the substrate portion 13a. An opening 32a is formed by chamfering a corner at one end of the end 32 and near one end of the substrate portion 13a. One end of 32 is open. The end 32 as a yarn guide and one end of the flat plate 13d are open. The end 32 and the other end of the flat plate portion 13d are closed without being opened by the extension portion 13c as a yarn guide portion.

  As shown in FIG. 5B, the bolt 23 as a support shaft is screwed into the hole of the lever 14, the nut 31, and the board portion 13a from the first surface 13aa side. The position of the lever 14 is adjustable so that the nut 14 contacts the switch 14 with the nut 31. The cylindrical portion of the bolt 23 is inserted into the hole of the lever 14 so that the lever 14 is supported by the bracket 13 so as to be rotatable around the bolt 23. The lever 14 is attached to the first surface 13aa by fastening the screw portion of the bolt 23 to the nut 31, the substrate portion 13a, and the nut 25 provided on the second surface 13ab side.

  As shown in FIGS. 5B and 5C, the extended portion 13c has a hole 33 substantially parallel to the lever detector 15 when viewed from the X direction. The holes 33 allow the wiring to be drawn out to the lever detector 15. An opening 34 is provided in the flat plate portion 13d. The opening 34 is provided at a position where the tip 14e of the lever 14 passes through the flat plate portion 13d when viewed from the Z direction.

  Next, the turning position of the lever 14 will be described. As shown in FIG. 5A, in an initial position where the lever 14 is not in contact with the weft Y12, the end 32 and one end of the flat plate portion 13d and the other end of the end 32 and the flat plate portion 13d are viewed from the X direction. And the extension 13c. The lever 14 forms a standby area 30 between the lever 14 and the end 32, the other end of the flat plate portion 13d, and the extending portion 13c. At the initial position, the weft Y12 is waiting in the waiting area 30.

  As shown in FIG. 6A, in the discharge position where the switch contact surface 14c of the lever 14 is in contact with the switch 22, the weft Y12 moves from the standby area 30 to the end 32 and one end of the flat plate portion 13d. are doing. When the weft Y12 moves from the standby area 30 to the end 32 and one end of the flat plate portion 13d and comes into contact with the yarn contact surface 14a, the lever 14 is rotated to rotate the standby region 30 and one end of the end 32 and the flat plate portion 13d. Is communicated with one end side.

  As shown in FIG. 6B, at the insertion position where the switch contact surface 14c of the lever 14 is not in contact with the switch 22, the weft Y23 moves from the end 32 and one end of the flat plate portion 13d to the standby area 30. are doing. The weft yarn Y23 moves from one end of the end 32 and the flat plate portion 13d to the standby region 30 and comes into contact with the yarn contact surface 14b, so that the lever 14 is rotated and one end of the standby region 30 and the end 32 and the flat plate portion 13d. Is communicated with one end side.

  Next, the operation of the present embodiment will be described together with the operation of the lever 14 when the weft Y12 is discharged and the operation of the lever 14 when the weft Y23 is inserted in the yarn detecting device 12 shown in FIGS. 6A and 6B.

  As shown in FIG. 6A, when the weft Y1 of the weft cheese 10 is completely consumed, the weft Y12 arranged in the standby area 30 is pulled by the weft insertion device (not shown) to the end 32 and the flat plate portion 13d. Then, it moves from the standby area 30 to the end 32 and one end of the flat plate portion 13d. The weft Y12 comes into contact with the thread contact surface 14a of the lever 14 when moving from the standby area 30 to the end 32 and one end of the flat plate portion 13d. The lever 14 receives the external force due to the movement of the weft Y12 and rotates clockwise U around the bolt 23 as a fulcrum when viewed from the Z direction from the broken line position to the solid line position of the lever 14. The lever 14 that rotates clockwise U contacts the switch 22 on the switch contact surface 14c. When the lever 14 comes into contact with the switch 22, the shift from the use of the weft Y1 of the weft cheese 10 to the use of the weft Y2 of the weft cheese 11 is detected. Even after the switch 22 detects the turning position of the lever 14, the weft Y12 keeps pushing the thread contact surface 14a of the lever 14. The weft Y12 passes through the gap between the lever 14 and the flat plate portion 13d and exits to the end 32 and one end side of the flat plate portion 13d, and is discharged from the yarn detecting device 12. When the weft Y12 is discharged from the yarn detection device 12, the lever 14 loses contact between the weft Y12 and the yarn contact surface 14a. Therefore, the lever 14 rotates counterclockwise from the solid line position to the broken line position of the lever 14 with the bolt 23 as a fulcrum when viewed from the Z direction, and returns to a position before receiving the external force due to the movement of the weft Y12. I do.

  When the weft Y1 of the weft cheese 10 is consumed, a new weft cheese (not shown) is mounted on the cheese stand instead of the weft cheese 10. The operator connects the end Y2t of the weft cheese 11 and the start of the weft of the new weft cheese.

  As shown in FIG. 6B, the operator moves the weft Y23 near the joint between the end Y2t of the weft cheese 11 and the start end of the new weft cheese along the end 32 and the end 32 along the flat plate portion 13d. And it is moved to the standby area 30 from one end side of the flat plate portion 13d. At this time, the weft Y23 and the thread contact surface 14b of the lever 14 come into contact. The lever 14 receives the external force due to the movement of the weft Y23, and rotates counterclockwise V about the bolt 23 as a fulcrum when viewed from the Z direction from the broken line position to the solid line position of the lever 14. When the weft Y23 moves to the standby area 30 and loses contact with the yarn contact surface 14b, the lever 14 rotates clockwise around the bolt 23 as a fulcrum when viewed from the Z direction from the solid line position of the lever 14 to the broken line position by its own weight. Rotate to U. Then, the weft Y23 is inserted into the yarn detecting device 12 by returning the lever 14 to the position before receiving the external force due to the movement of the weft Y23.

According to the above embodiment, the following effects can be obtained.
(5) The flat plate portion 13d has an opening 34 through which the lever 14 passes. As a result, when the weft Y12 is discharged, the weft Y12 moves along both ends of the flat plate portion 13d as the yarn guide portion with the lever 14 interposed therebetween. Therefore, it is possible to prevent the weft Y12 from slipping through at the time of discharging the weft Y12 with a smaller number of parts compared to the yarn detection device 12 according to the first embodiment.

(Third embodiment)
Next, a third embodiment will be described with reference to FIGS. This embodiment is different from the first embodiment in that a photoelectric sensor 37 is used in place of the lever detector 15 having the switch 22. Other configurations are basically the same as those of the first embodiment. It is the same as the detection device 12.

  As shown in FIG. 7B, a photoelectric sensor 37 having a light projector 38 and a light receiver 39 is arranged on a bracket 36 provided on a cheese stand (not shown). The light emitter 38 and the light receiver 39 are arranged in parallel with the bracket 36 when viewed from the Z direction. By irradiating the light from the light projector 38 to the light receiver 39, an optical axis 40 is formed between the light projector 38 and the light receiver 39. The optical axis 40 is provided at the discharge position of the lever 14 when the weft Y12 is discharged when viewed from the Z direction. The photoelectric sensor 37 detects interruption of light at the optical axis 40 emitted from the light projector 38 to the light receiver 39. The photoelectric sensor 37 is electrically connected to a machine base through wiring (not shown).

  As shown in FIG. 7A, the lever 14 has a thread contact surface 14a and a thread contact surface 14b that contact the weft Y12. The lever 14 has a light-shielding surface 14d as a detection surface for detecting the rotation position of the lever 14 by blocking light emitted from the light emitter 38 of the photoelectric sensor 37 to the light receiver 39.

Next, the turning position of the lever 14 will be described.
As shown in FIG. 7A, at the discharge position where the light shielding surface 14d of the lever 14 blocks the optical axis 40 from the light projector 38 to the light receiver 39, the weft Y12 is moved from the standby area 30 to the yarn guide groove. 28 and one end of the thread guide 29. When the weft Y12 comes into contact with the yarn contact surface 14a by moving from the standby area 30 to one end of the yarn guide groove 28 and the yarn guide 29, the lever 14 is rotated, and the standby area 30 and one end of the yarn guide groove 28 are moved. Communicated.

  Next, the operation of the present embodiment will be described together with the operation of the lever 14 when the weft Y12 is discharged in the yarn detecting device 12 shown in FIG.

  As shown in FIG. 7A, when the weft Y1 of the weft cheese 10 is completely consumed, the weft Y12 arranged in the standby area 30 is pulled by a weft insertion device (not shown), and the yarn guide groove 28 and the yarn guide are formed. It moves from the standby area 30 to one end of the yarn guide groove 28 and the yarn guide 29 along the line 29. The weft Y12 contacts the thread contact surface 14a of the lever 14 when moving from the standby area 30 to one end of the thread guide groove 28 and the thread guide 29. The lever 14 receives the external force due to the movement of the weft Y12 and rotates clockwise U around the bolt 23 as a fulcrum when viewed from the Z direction from the broken line position to the solid line position of the lever 14. The lever 14 that rotates clockwise U blocks light emitted from the light emitter 38 of the photoelectric sensor 37 to the light receiver 39 at the light shielding surface 14d. The photoelectric sensor 37 detects a transition from the use of the weft Y1 of the weft cheese 10 to the use of the weft Y2 of the weft cheese 11 by blocking the light emitted from the light emitter 38 to the light receiver 39 of the photoelectric sensor 37 by the light shielding surface 14d. Is done. Even after the photoelectric sensor 37 detects the rotation position of the lever 14, the weft Y12 keeps pushing the thread contact surface 14a of the lever 14. The weft Y12 passes through the gap between the lever 14 and the thread guide groove 28 and the gap between the lever 14 and the thread guide 29 and exits to the one end of the thread guide groove 28 and the thread guide 29, and is discharged from the thread detecting device 12. . When the weft Y12 is discharged from the yarn detection device 12, the lever 14 loses contact between the weft Y12 and the yarn contact surface 14a. Therefore, the lever 14 rotates counterclockwise from the solid line position to the broken line position of the lever 14 with the bolt 23 as a fulcrum when viewed from the Z direction, and returns to a position before receiving the external force due to the movement of the weft Y12. I do.

According to the above embodiment, the following effects can be obtained.
(6) By using the photoelectric sensor 37 as the detector, the lever 14 has no physical contact with the switch 22 as compared with the case where the lever detector 15 is used. And the damage of the weft Y12 can be reduced.

The above embodiment may be modified as follows.
The bracket 13 need not be a metal material plate, but may be a resin material plate.

The lever 14 may not be made of a resin material, but may be made of a metal material.

The return of the lever 14 may not be the return by its own weight. In this case, the lever 14 may be returned to the initial position by a restoring force generated by providing an elastic body such as a spring on the thread contact surface 14a and the thread contact surface 14b of the lever 14.

The shape of the lever 14 does not have to be substantially triangular and may be substantially rectangular.

The lever 14 does not have to be located below the lever detector 15, and the fixed position of the lever 14 and the lever detector 15 may be changed as appropriate.

(Circle) the thread contact surface 14a as a thread contact part and the switch contact surface 14c as a detection part may be the same surface.

The opening 34 may be a groove which is open in the X direction of the flat plate portion 13d.

The photoelectric sensor 37 may not be provided on the bracket 36, may be provided on the cheese stand, or may be provided on the bracket 13 and the bracket cover 17.

  12 ... thread detecting device, 14 ... lever, 14 c ... switch contact surface, 15 ... lever detector, 23 ... bolt, 28 ... thread guide groove, 29 ... thread guide, 30 ... standby area, Y12 ... weft, Y23 ... weft

Claims (6)

A bracket having a yarn guiding portion for guiding the yarn,
A lever rotatably supported by a spindle fixed to the bracket at a position in contact with the yarn moving the yarn guide,
A detector for detecting a rotational position of the lever,
One end of the yarn guide is open, and the other end of the yarn guide is closed,
The lever is
An initial position in which a standby area for the yarn is formed between the lever and the other end of the yarn guide by being located between one end and the other end of the yarn guide;
A discharge position rotated by the yarn moving from the standby region to one end of the yarn guide portion to communicate the standby region with one end of the yarn guide portion;
It is rotatable between an insertion position that is rotated by the yarn moving from the one end side of the yarn guide section to the standby area and communicates the standby area with one end side of the yarn guide section,
The initial position is located between the discharge position and the insertion position,
Having a detection surface that is detected by the detector only at the discharge position,
A yarn detecting device characterized by the above-mentioned. The yarn detecting device according to claim 1, wherein the lever returns to the initial position from the discharge position and the insertion position by its own weight. The yarn detecting device includes a bracket cover having a yarn guide for guiding the yarn,
The yarn detecting device according to claim 1, wherein the lever is disposed between the yarn guide of the bracket and the yarn guide of the bracket cover. The said thread guide part which the said bracket has is provided with the flat plate part arrange | positioned at the front-end | tip side of the said lever, and has an opening through which the said lever penetrates in the said flat plate part. Thread detector. The yarn detector according to any one of claims 1 to 4, wherein the detector is a lever detector having a switch that contacts the detection surface. The yarn detector according to any one of claims 1 to 4, wherein the detector is a photoelectric sensor having a light emitter and a light receiver.

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