JP4428694B2 - Malfunction prevention device for weft length measuring storage device - Google Patents

Description

  The present invention relates to a weft length measuring and storage device for a loom, and a device for preventing entry of a weft from a rotating yarn guide into a mounting gap between a plurality of drum pieces and a drum mounting member constituting a drum for measuring and storing a weft length. .

  FIG. 1 discloses a conventional general drum-type weft length measuring and storage device having a weft length measuring device at the rear, for example, a drum-type weft length measuring and storing device 1 of Patent Document 1. In FIG. 1, a weft 2 is wound around a yarn feeder 3, pulled out by rotation of a pair of rollers 4 (weft length measuring device), passes through a flyer 5, and is attached to the tip of the turning side of the flyer 5. It comes out of the rotating yarn guide 6 and is locked by a locking pin 8 on the outer periphery of the length measuring storage drum 7. In this state, the flyer 5 rotates to move the rotary yarn guide 6 around the outer periphery of the drum 7, wind the weft 2 around the drum 7, and a weft having a length necessary for one weft insertion on the drum 7. It is stored until weft insertion while measuring 2.

  At the time of weft insertion, when the locking pin 8 moves backward, the weft 2 that has been wound on the outer periphery of the drum 7 is unwound at a time, and between the rotating yarn guide 6 and the fixed yarn guide 9 on the clamper 11 side. As shown in FIG. 1 (1), the weft 2 flies while forming a spiral. While the weft 2 is spiraling and flying, the flyer 5 continues to rotate, and after all the weft 2 wound around the drum 7 has been unwound, the upstream portion of the spiral weft 2, that is, The weft 2 on the side of the rotating yarn guide 6 that continues to rotate becomes unnatural and moves irregularly due to air resistance and looseness of the weft 2 as shown in FIG. After all the wefts 2 have been unwound, the wefts 2 are fed directly from the rotary yarn guide 6 to the weft insertion nozzle 10 without going through the drum 7.

  At the time of weft insertion, the clamper 11 releases the weft yarn 2 and the weft insertion nozzle 10 injects the weft 2 that has been unwound into the opening 14 of the warp yarn 13 by injecting the weft insertion fluid. The weft thread 2 that has been inserted is beaten by a reed 15 to form a woven cloth 16, and then cut by cutters 17 at both ends of the woven cloth 16, and separated from the weft thread 2 inside the weft insertion nozzle 10.

When the drum 7 is composed of a plurality of, for example, four drum pieces 71, and these drum pieces 71 are attached to the surface of the disc-like drum attachment member 72 in a discontinuous state in the circumferential direction along an arc, FIG. As described above, the attachment gap 12 is formed at the joint portion between the drum piece 71 and the drum attachment member 72 by chamfering the end of the drum piece 71 (R machining). For this reason, when the weft 2 is violently moving irregularly, the weft 2 enters the attachment gap 12 on the upstream side in the rotational direction of the rotary yarn guide 6 and is caught there as shown in FIG. . This has the disadvantage that the loom stops.
Japanese Patent Publication No. 8-30298

  Accordingly, an object of the present invention is to prevent the weft from entering the attachment gap between the drum piece and the drum attachment member in the weft length measuring and storage device.

To achieve the above object, according to the first aspect of the present invention, there are provided a plurality of drum pieces constituting a drum, a drum attachment member in which the drum piece is fastened and fixed to a front attachment surface by bolts and nuts, and a rotary yarn guide. In the weft length measuring storage device of a loom for winding the weft around the drum by rotating the rotating yarn guide around the drum, the axial direction of the drum mounting member is upstream of the rotating direction of the rotating yarn guide of the drum piece. A weft entry preventing member that extends forward from the attachment surface position and extends beyond the width of the attachment gap between the drum piece and the drum attachment member, thereby constituting a malfunction prevention device for the weft length measuring and storage device. ing.

  According to a second aspect of the present invention, the drum mounting member is configured such that the drum piece can be movably accommodated, and a groove extending in the radial direction of the drum mounting member is formed. The portion is used as a weft entry preventing member.

  According to a third aspect of the invention, at least the groove wall corner on the downstream side in the rotational direction of the rotary yarn guide of the corresponding drum piece is formed by C chamfering or R chamfering.

  According to a fourth aspect of the present invention, one end of the weft entry preventing member fixed to the mounting surface of the drum mounting member is positioned in the inner region of the movement locus of the yarn mouth of the rotating yarn guide, and the other end is connected to the drum mounting member. Are extended so as to approach the center of the drum mounting member in the radial direction. For example, the weft entry preventing member may be extended in a direction parallel or perpendicular to the adjustment movement direction of the corresponding drum piece.

  According to the fifth aspect of the present invention, at least the tip of the weft entry preventing member located outside the drum mounting member is positioned behind the mounting surface position of the drum mounting member, and is bent forward and bent from the mounting surface position. It extends along the surface.

  In the invention according to claim 6, the weft entry preventing member can be moved in parallel with the adjustment movement direction of the corresponding drum piece.

  In the invention according to claim 7, at least a part of the weft entry preventing member is located on the upstream side in the rotational direction of the rotary yarn guide with respect to the drum piece and in the vicinity of the corner of the drum piece outside the drum mounting member. It is provided as follows.

  According to the first aspect of the present invention, the attachment gap between the drum piece and the drum attachment member opens to the upstream side in the rotational direction of the rotary yarn guide, but the weft thread on the upstream side in the rotational direction of the rotary yarn guide of the corresponding drum piece. Since the entry preventing member is provided, the weft yarn moving from the upstream side in the rotation direction by the rotating yarn guide is pushed forward by the weft entry preventing member beyond the width of the mounting gap. For this reason, it is possible to prevent the weft from entering the attachment gap. This reduces the number of stops and improves the operating rate. As a result, weaving is possible even for thread types in which the weft yarn is easy to loosen and run out easily, so that the versatility of the weft length measuring storage device is improved.

  According to the invention of claim 2, by accommodating the drum piece in the groove, the attachment gap is located in the groove and the groove wall portion closes the attachment gap, so that wefts are prevented from entering the attachment gap. it can.

  According to the third aspect, by chamfering or R chamfering the groove wall corner, it is possible to prevent the weft moving by the rotary yarn guide from being caught by the groove wall corner.

  According to the fourth aspect, when the weft moved from the upstream side in the rotation direction by the rotating yarn guide collides with the weft entry preventing member, the weft can escape forward from the attachment gap, so that the weft enters the attachment gap. Can be prevented.

  According to the fifth aspect, the tip is located behind the mounting surface position of the drum mounting member and extends forward from the mounting surface position. It is possible to prevent the weft from being caught in the attachment gap between the attachment surface and the weft entry preventing member.

  According to the sixth aspect, by making the weft entry preventing member movable, it is possible to adjust the weft catch.

  According to the seventh aspect, the weft is most likely to be caught in the vicinity of the corner portion. Therefore, by providing the weft entry preventing member so as to be located in the vicinity thereof, the weft is effectively caught. Can be prevented.

  As shown in FIG. 1, the present invention relates to a weft length measuring storage device 1 for a loom of a loom in which the weft yarn 2 is wound around the drum 7 by rotating the rotary yarn guide 6 around the drum 7, that is, outside the drum mounting member 72. Is assumed. As shown in FIGS. 3 to 11, the drum 7 is composed of a plurality of, for example, four drum pieces 71, and each drum piece 71 is a front surface of a disc-shaped drum mounting member 72, that is, a mounting surface 73. In addition, it is attached at a central angle of 90 degrees along an arc whose center is the center of the mounting surface 73. Each drum piece 71 forms a drum surface 74 for winding the weft 2 on its outer surface, but the drum surface 74 is not continuous in the circumferential direction and is in a discontinuous state. At the joint portion between the drum piece 71 and the drum attachment member 72, an attachment gap 12 is formed by the end chamfering process (R process) of the drum piece 71, which is the above-mentioned problem.

  3 to 11 show the respective embodiments of the malfunction preventing device 20 of the weft length measuring and storing device of the present invention. 3 to 11, the malfunction prevention device 20 of the weft length measuring storage device has a weft entry preventing member 21 for each drum piece 71 or for each specific drum piece 71. The weft entry preventing member 21 is attached to the drum attachment member 72 and extends forward from the position of the attachment surface 73 in the axial direction of the drum attachment member 72 on the upstream side in the rotation direction of the rotary yarn guide 6 of the drum piece 71. And it extends in the circumferential direction beyond the width of the mounting gap 12 between the drum piece 71 and the drum mounting member 72.

  The attachment gap 12 between the drum piece 71 and the drum attachment member 72 opens to the upstream side in the rotational direction of the rotary yarn guide 6, but prevents the weft entry from upstream in the rotational direction of the rotary yarn guide 6 of the corresponding drum piece 71. Since the member 21 is provided, the weft 2 that moves from the upstream side to the downstream side in the rotational direction by the rotating yarn guide 6 is pushed forward by the weft entry preventing member 21 beyond the width of the mounting gap 12. Do not enter. In this way, entry of the weft 2 into the attachment gap 12 can be prevented. Therefore, the number of stops is reduced and the operating rate is improved. Moreover, since the weft yarn 2 is easy to loosen and can be woven even with a yarn type that is prone to violence, versatility is improved.

  3 to 11, FIG. 3 is the first embodiment, FIGS. 4 to 6 are the second embodiment, FIG. 7 is the third embodiment, FIG. 8 is the fourth embodiment, and FIG. 9 is the fifth embodiment. 10 corresponds to the sixth embodiment, and FIG. 11 corresponds to the seventh embodiment. The first to seventh embodiments show a specific configuration of the weft entry preventing member 21. These embodiments will be described sequentially below.

[Embodiment 1 of FIG. 3]
In the first embodiment, a cross-shaped groove 75 extending in the radial direction of the drum mounting member 72 is formed on the mounting surface 73 of the drum mounting member 72, and four drum pieces 71 are movably accommodated in the groove 75. In addition, the groove wall 76 on the upstream side in the rotation direction of the rotary yarn guide 6 is the weft entry preventing member 21. The depth of the groove 75 is deeper than the mounting gap 12. Each drum piece 71 is accommodated in the groove 75, adjusted in position along the radial elongated hole 77 in the groove 75, and then tightened by the bolt / nut 18 to be fixed to the drum mounting member 72.

  When the drum piece 71 is accommodated in the groove 75, the attachment gap 12 is positioned in the groove 75, and the weft entry preventing member 21 by the groove wall portion 76 closes the attachment gap 12. This prevents the weft 2 from entering the attachment gap 12.

  The groove wall portion 76 is normally perpendicular to the bottom surface of the groove 75, but at least the groove wall portion 76 corresponding to the downstream side in the rotational direction of the rotary yarn guide 9 is partially enlarged. The corners of the groove wall 76 (groove bottom side concave corner and groove top side convex corner) may be formed by C chamfering or R chamfering. . According to the formation of the chamfer, it is possible to prevent the weft 2 moving by the rotating yarn guide 6 from being caught by the corner of the groove wall portion 76, particularly the convex portion on the groove upper surface side, and the resistance of the sliding movement of the weft 2 can be reduced.

[Embodiment 2 of FIGS. 4 to 6]
In the second embodiment, one end of the linear weft entry preventing member 21 fixed to the attachment surface 73 of the drum attachment member 72 is positioned in the inner region of the movement locus of the yarn mouth of the rotary yarn guide 6, and the other end is one end. In contrast, the radial direction of the drum mounting member 72 extends so as to approach the center of the drum mounting member 72, and the weft entry preventing member 21 extends in a direction parallel or perpendicular to the adjustment movement direction of the corresponding drum piece 71. It is an aspect to exist.

  The linear weft entry preventing member 21 shown in FIGS. 4 and 5 is inserted into the positioning hole 78 of the drum mounting member 72 at the tip located on the outer peripheral side of the drum mounting member 72, and is located behind the position of the mounting surface 73. And is bent forward from the position of the mounting surface 73 and extends along the mounting surface 73, and is fixed to the mounting surface 73 by the set screw 19 at the other end positioned on the center side of the drum mounting member 72. . When the drum piece 71 is adjusted to the outermost position with respect to the drum mounting member 72, one end of the weft entry preventing member 21 is positioned near the outer corner of the drum piece 71, and vice versa. When the drum piece 71 is adjusted to the innermost position with respect to the drum mounting member 72, the screw is arranged so that the other end of the weft entry preventing member 21 is located further in the center direction than the vicinity of the corner of the drum piece 71. It has been stopped. In this way, the weft entry preventing member 21 is always in a position covering the corner on the upstream side in the rotational direction of the rotating yarn guide 6 of the drum piece 71 within the range of the adjustment movement region of the drum piece 71.

  The weft entry preventing member 21 may be constituted by a plate-like body as shown in FIG. 6 (1). The other end may be fixed to the mounting surface 73 by the set screw 19. Further, both ends of the linear weft entry preventing member 21 may be placed in the positioning hole 78 and positioned behind the position of the mounting surface 73 of the drum mounting member 72 as shown in FIG. . In this case, the weft entry preventing member 21 is fixed by an adhesive or frictional locking.

  The tip of the weft entry preventing member 21 at least outside the drum mounting member 72 is located behind the position of the mounting surface 73 of the drum mounting member 72 and is bent forward and from the position of the mounting surface 73. Since it extends along the mounting surface 73 and extends continuously without a mounting gap at the position of the mounting surface 73 at this portion, it is moved from the upstream side in the rotational direction by the rotating yarn guide 6. When the incoming weft 2 collides with the weft entry prevention member 21, the weft 2 is not caught in the attachment gap 12 between the weft entry prevention member 21 and the attachment surface 73, and the weft 2 can escape ahead of the attachment gap 12. Therefore, the weft 2 can be prevented from entering the attachment gap 12.

[Embodiment 3 of FIG. 7]
In the third embodiment, the plate-like weft entry preventing member 21 is attached to the mounting surface 73 of the drum mounting member 72 from the outside of the drum mounting member 72 upstream of the corresponding drum piece 71 in the rotational direction of the rotary yarn guide 6. This is a mode in which the drum piece 71 extends in parallel with the adjustment movement direction. One end on the outer peripheral edge side of the plate-like weft entry preventing member 21 is located behind the position of the attachment surface 73 of the drum attachment member 72, and the plate-like weft entry prevention member 21 is located forward of the position of the attachment surface 73. And it bends and extends. Thus, the weft entry preventing member 21 is bent when viewed from the side so that the weft 2 can smoothly pass through the weft entry preventing member 21.

  The weft entry preventing member 21 may extend at right angles to the adjustment movement direction of the corresponding drum piece 71 as indicated by a two-dot chain line in FIG. When the attachment side portion of the weft entry prevention member 21 protrudes outward from the drum attachment member 72 as indicated by a two-dot chain line in FIG. 7A, the outside of the attachment side portion of the weft entry prevention member 21 is It is formed in an arc shape. If formed in this way, the weft 2 can be prevented from being caught by the weft entry preventing member 21.

  In this way, the weft entry preventing member 21 is located behind the position of the mounting surface 73 of the drum mounting member 72 at the front end (the outer peripheral side front end of the drum mounting member 72), and in most parts. Since it extends forward from the position of the mounting surface 73, there is no mounting gap at the position of the mounting surface 73, and the weft 2 is caught in the mounting gap between the mounting surface 73 and the weft entry preventing member 21. Can be prevented.

[Embodiment 4 of FIG. 8]
In the fourth embodiment, the linear weft entry preventing member 21 is extended in a direction perpendicular to the adjustment movement direction of the corresponding drum piece 71, and one end of the attachment side is inserted into the attachment hole 79 of the drum attachment member 72. This is a mode in which it is positioned rearward of the position of the mounting surface 73 and extends in a state where the front part of the mounting surface 73 is bent in the moving direction of the weft 2. If the attachment hole 79 is a long hole parallel to the long hole 77 and the linear weft entry preventing member 21 is tightened with a nut to the long hole, the weft entry preventing member 21 is a drum piece. Similarly to 71, it can also be movable parallel to the adjustment movement direction.

[Embodiment 5 of FIG. 9]
In the fifth embodiment, the linear weft entry preventing member 21 is arranged at a right angle to the adjusting movement direction of the corresponding drum piece 71, and both ends thereof are inserted into the mounting holes 79 of the drum mounting member 72 to position the mounting surface 73. In addition to being positioned further rearward, the front portion than the position of the mounting surface 73 is bent and provided outside the drum mounting member 72 so as to straddle the outer hem portion of the drum piece 71. The weft entry preventing member 21 of the fourth embodiment corresponds to one end portion of the weft entry preventing member 21 on the upstream side in the rotational direction of the rotating yarn guide 6 in the fifth embodiment. This portion is a portion that prevents the weft 2 from entering the attachment gap 12.

[Sixth Embodiment in FIG. 10]
In the sixth embodiment, the same weft entry preventing member 21 as in the fifth embodiment is provided on the drum mounting member 72 at a position outside the drum piece 71 so as not to straddle the outer hem portion of the drum piece 71. . In the fifth embodiment, the weft entry preventing member 21 is fixed and cannot move, but a long mounting hole 79 parallel to the long hole 77 and a nut for fixing the weft entry preventing member 21 are used. Thus, if it is configured to be fastened and fixed, the weft entry preventing member 21 can move in parallel to the adjustment movement direction, like the drum piece 71.

[Embodiment 7 of FIG. 11]
In the seventh embodiment, the attachment side portion of the weft entry preventing member 21 is bent in a U shape, the push screw 22 is screwed into the back portion, and the push screw 22 is pressed against the drum attachment member 72 and fixed. It is an aspect to do. The weft entry preventing member 21 has a plate shape and a U-shape, and is attached so as to sandwich the drum attachment member 72. Extending in parallel.

  In each embodiment, the weft entry preventing member 21 may be formed using a part of the drum mounting member 72 regardless of the shape such as a linear shape or a plate shape. Furthermore, the weft entry preventing member 21 can be provided on any one or more of the four drum pieces 71.

1 shows a conventional drum-type weft length measuring and storage device 1, wherein (1) is an explanatory diagram immediately after unwinding, and (2) is an explanatory diagram at the time of flyer rotation after unraveling. FIG. 3 is an explanatory diagram of a mounting gap 12 between a drum piece 71 and a drum mounting member 72 in the drum-type weft length measuring storage device 1. In the malfunction prevention apparatus 20 of the weft length measuring and storing apparatus according to Embodiment 1 of the present invention, (1) is a front view thereof, and (2) is a side view thereof. In the malfunction prevention apparatus 20 of the weft length measuring and storing apparatus according to the second embodiment of the present invention, (1) is a front view thereof, and (2) is a side view thereof. It is a top view of the weft entry prevention member 21 by Embodiment 2 of this invention. It is a top view of the weft entry prevention member 21 by Embodiment 2 of this invention. In the malfunction prevention apparatus 20 of the weft length measuring and storing apparatus according to the third embodiment of the present invention, (1) is a front view thereof, and (2) is a side view thereof. In the malfunction prevention apparatus 20 of the weft length measuring and storing apparatus according to Embodiment 4 of the present invention, (1) is a front view thereof, and (2) is a side view thereof. In the malfunction prevention apparatus 20 of the weft length measuring and storing apparatus according to the fifth embodiment of the present invention, (1) is a front view thereof, and (2) is a side view thereof. In the malfunction prevention apparatus 20 of the weft length measuring and storing apparatus according to the sixth embodiment of the present invention, (1) is a front view thereof, and (2) is a side view thereof. In the malfunction prevention apparatus 20 of the weft length measuring and storing apparatus according to Embodiment 7 of the present invention, (1) is a front view thereof, and (2) is a side view thereof.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Weft length measurement storage apparatus 71 Drum piece 2 Weft 72 Drum attachment member 3 Yarn supply body 73 Attachment surface 4 Roller 74 Drum surface 5 Flyer 75 Groove 6 Rotating yarn guide 76 Groove wall part 7 Drum 77 Long hole 8 Locking pin 78 Positioning Hole 9 Fixed yarn guide 79 Mounting hole 10 Weft insertion nozzle 11 Clamp 12 Installation gap 13 Warp 14 Open 15 １６ 16 Woven cloth 17 Cutter 18 Bolt / Nut 19 Set screw 20 Drum type weft length measuring storage device malfunction prevention device 21 Weft entry Blocking member 22 Press screw

Claims (7)

A plurality of drum pieces constituting the drum, a drum mounting member in which the drum pieces are fastened and fixed to the front mounting surface by bolts and nuts, and a rotating yarn guide, and the rotating yarn guide rotates around the drum. In the weft length measuring and storing device of the loom that winds the weft around the drum,
A weft entry that extends forward from the mounting surface position in the axial direction of the drum mounting member and extends more than the width of the mounting gap between the drum piece and the drum mounting member on the upstream side of the rotating yarn guide of the drum piece. An apparatus for preventing malfunction of a weft length measuring storage device, characterized in that a blocking member is provided.   A drum piece can be movably accommodated in the drum attachment member, a groove extending in the radial direction of the drum attachment member is formed, and the groove wall portion on the upstream side in the rotation direction of the rotary yarn guide is defined as a weft entry preventing member. The malfunction preventing device for the weft length measuring and storing device according to claim 1.   The apparatus for preventing malfunction of a weft length measuring and storing apparatus according to claim 2, wherein at least the groove wall corner on the downstream side in the rotational direction of the rotating yarn guide of the corresponding drum piece is formed by C chamfering or R chamfering.   A weft entry preventing member fixed to the attachment surface of the drum attachment member, one end of which is positioned in the inner region of the moving locus of the yarn mouth of the rotary yarn guide and the other end of the drum in the radial direction of the drum attachment member with respect to the one end 2. The malfunction preventing apparatus for a weft length measuring and storing apparatus according to claim 1, wherein the apparatus extends so as to approach the center of the mounting member.   The front end of the weft entry preventing member positioned at least outside the drum mounting member is positioned rearward of the mounting surface position of the drum mounting member, bends forward from the mounting surface position, and extends along the mounting surface. The malfunction prevention device for the weft length measuring and storing device according to claim 1 or 4, wherein   5. The malfunction preventing device for a weft length measuring and storing apparatus according to claim 1, wherein the weft entry preventing member is movable in parallel to the adjusting movement direction of the corresponding drum piece.   That at least a portion of the weft entry preventing member is provided on the upstream side of the rotating direction of the rotating yarn guide with respect to the drum piece and in the vicinity of the corner of the drum piece outside the drum mounting member. 6. The malfunction preventing apparatus for a weft length measuring and storing apparatus according to claim 1, 4 or 5.

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