JP2001279540A - Lappet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lappet capable of surely preventing the positional shift of a snail wire. SOLUTION: This lappet (100) is characterized in that a lappet body (110) has sidewall parts (113 and 114) substantially brought into contact with a mounting part of a snail wire (120) on both sides in the lappet (100) having the snail wire (120) provided with a swirl part (121) having a yarn guide hole for guiding a yarn on the tip side and a mounting part (123) extending from the swirl part (121) in a nearly linear form and bent in a nearly U-shaped state on the base end side and the lappet body (110) having the snail wire (120) fixed on the mounting part with a fixing tool and directly or indirectly rotatably pivoted on a support.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lappet used for a ring spinning machine, a ring twisting machine, a drawing twisting machine and the like.

[0002]

2. Description of the Related Art A lappet is used for a ring spinning machine or the like, and holds a snell wire having a yarn introduction hole for guiding a yarn at a front end side. Here, a wrappet of a general ring spinning machine will be taken as an example, and its outline will be briefly described below. As shown in FIG. 4, the yarn Y spun from the front top roller R1 and the front roller R2.
Is guided to the yarn introduction hole 21a of the snell wire 20 on the tip side of the lappet 1 and further guided therefrom to the traveler 31 moving on the ring 30 to be spindle (not shown).
It is wound on a bobbin 40 which rotates together with it. At this time, the yarn Y is wound around the bobbin 40 while rotating, with the yarn introduction hole 21a located on the central axis of the bobbin 40 serving as the center of ballooning (balloon), and a predetermined twist is applied to the yarn Y. FIG. 4 shows an antinode ring 35 for reducing interference of yarn between adjacent bobbins and spinning tension and a ring rail for raising and lowering the ring 30 for uniformly winding the yarn Y around the bobbin 40. 32 is also shown.

However, in order to obtain high-quality spun yarn (eg, spun yarn) using such a ring spinning machine or the like, it is not preferable that extra sliding resistance or tension acts on the yarn.
Therefore, if the above-described lappet 1 is taken as an example, the lappet 1 can accurately insert the bobbin 40 into the yarn introduction hole 21a of the snell wire 20.
It is desired to hold it on the center axis of rotation. Japanese Patent Application Laid-Open No. 9-228165 discloses such a lappet 1, which is shown in FIG. This lappet 1
Restriction piece 11 that can restrict the mounting position of snell wire 20
Is provided on the tip end side of the lappet main body 10, and the positioning piece 11 can be used to position the snell wire 20.

[0004]

However, in such a regulating piece 11, the snell wire 20 is moved in the direction F1 shown in FIG.
Even if it can be regulated to (solid line), it cannot be regulated in the opposite direction F2 (broken line). Therefore, for example, when a worker breaks a thread or the like and performs splicing or pipe replacement, if the worker's hand or the like touches the spiral portion 21 of the snell wire 20, the position of the snell wire 20 may be shifted. was there. Correcting such misalignment of the snell wire 20 increases the number of work steps and lowers productivity. Further, if spinning or the like is continued without noticing the positional deviation of the snell wire 20, the sliding resistance between the yarn and the yarn introduction hole increases, the yarn is fluffed, and the quality of spun yarn and the like is reduced.

[0005] In addition, such a restricting piece 11 is formed by screwing the snell wire 20 to the lappet body 10 (bolts, screws, etc.).
When fixing with the nut 12 and the nut 13, the snell wire 20
Due to the main purpose of providing a function as a rotation stop, the conventional lappet 1 has not been considered to restrict the position of the snell wire 20 to the opposite side (direction F2).

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and a lappet which can stably hold a predetermined position without easily causing a displacement or the like even when a snell wire receives an impact or the like. The purpose is to provide.

[0007]

The inventor of the present invention has made intensive studies to solve this problem, and as a result of repeated trial and error.
The inventors came up with the idea of stably holding the position of the snell wire by using the side wall of the lappet body, and developed the lappet of the present invention.

That is, the wrappet of the present invention has a spiral portion having a yarn guiding hole on the distal end side for guiding a yarn, and a mounting portion extending substantially linearly from the spiral portion and bent substantially U-shaped at the proximal end side. And a lappet body that is fixed by a fixing tool at the mounting portion and that is rotatably supported directly or indirectly on a support body. And a side wall portion substantially abutting on the mounting portion of the snell wire. In the lappet of the present invention, since the lappet body has side walls on both sides that substantially contact the mounting portion of the snell wire, the position of the snell wire is restricted by the side walls. Therefore, the snell wire is stably held at a desired position, and does not easily displace even if it receives an impact or the like. Also, because the side wall of the lappet body is used,
For example, the position of the snell wire can be regulated at low cost without adding a new member or the like, which is convenient.

Note that "substantially abut" means not only when the mounting portion of the snell wire is in strict contact with the side wall of the lappet body, but also when a very small gap is formed between them. This includes the case where there is. Here, even if the snell wire moves in a very small range due to a very small gap formed between the mounting portion of the snell wire and the side wall of the lappet body, the degree of the movement is extremely large compared to the conventional case. It is small and does not really matter. Of course, in order to eliminate such a gap, a snell wire may be fitted (for example, press-fitted) between both side walls of the lappet body and elastically held.

[0010] It is preferable that the lappet main body includes a restricting piece at a distal end side for substantially holding the mounting portion of the snell wire between the wrappet body and the side wall. The position of the snell wire can be held more stably by adding a regulating piece to the tip side of the lappet body and substantially holding the snell wire with the above-mentioned side wall portion. Also, by holding the snell wire on the tip side of the wrappet body near the spiral part having the yarn guiding hole, it is possible to suppress the vibration of the spiral part generated when the yarn slides on the inner peripheral side of the yarn guiding hole. Yes (the amplitude can be suppressed), which is convenient. Such vibration (amplitude)
, The actual displacement of the yarn introduction hole due to vibration can be suppressed and reduced, and the durability of the snell wire can be improved. In this case, “substantially sandwiching” also means not only when the mounting portion of the snell wire is in strict contact with both the regulating piece and the side wall portion of the lappet body, but also very little between them. It may be a case where a proper gap is formed.

It is preferable that the mounting portion of the snell wire is substantially held between the shaft portion of the fixing tool and the side wall portion. Since the mounting portion of the snell wire is substantially clamped between the shaft portion and the side wall portion of the fixture, it is effective to prevent the position of the snell wire from shifting. In particular, when the fixing device is disposed at the center of the axis of the lappet body, the mounting portion of the snell wire bent between both side walls of the lappet body and the shaft portion of the fixing device can be sandwiched from both sides, and the position of the snell wire can be reduced. It is held more stably. The “substantially holding” in this case is the same as described above. The shaft of such a fixture may be straight or tapered. When the shaft portion is tapered, the bent portion of the snell wire is pushed out, and can be reliably brought into contact with the side wall portion of the lappet main body.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a lappet according to the present invention will be described below with reference to FIG. FIG. 1A shows a front view of the lappet 100, and FIG. 1B shows a bottom view of the lappet 100. As shown in FIG. 1, the lappet 100 includes a snell wire 120 and a lappet body 1.
10 and a support bracket 140. The snell wire 120 is formed by bending a wire, and includes a spiral part 121 on the distal end side (left side in FIG. 1) and a mounting part 123 on the proximal end side (right side in FIG. 1). Spiral part 1
Reference numeral 21 denotes a wire wound in a spiral shape, and a yarn introduction hole 121a for guiding a yarn is formed substantially at the center thereof. The slab catcher 121b that catches and cuts the spun yarn when an abnormality such as a slab or a thick yarn occurs occurs.
21 and extends obliquely rearward. Further, the snell wire 120 has a substantially linear straight portion 123a extending from the spiral portion 121 to the base end side.
3a, a bent portion 123b bent substantially in a U-shape;
23c. Then, the straight portion 123a and the bent portion 12
The mounting portion 123 according to the present invention is formed by 3b and 123c. The interval between the bent portions 123b and 123c is substantially equal to the shaft diameter of the shaft portion 130b of the screw 130, which is a fixing device according to the present invention.

The lappet body 110 comprises a flat portion 112, side walls 113 and 114, and a regulating portion 111, and is a member having a substantially U-shaped cross section. The shape of the flat portion 112 changes from the distal end side to the proximal end side (the right side in FIG. 1) in the form of a narrowed square shape → a trapezoidal shape → a widened square shape symmetrically with respect to the axis center. Along both sides of the plane portion 112, side wall portions 113 and 114 stand substantially perpendicularly. Then, the side wall 11 on the tip side
3 and 114 are parallel, and their interval (the inner width of the plane portion 112)
The width of the square nut 131 and the width of the bent portions 123b and 123c of the snell wire 120 are substantially equal. The proximal side walls 113 and 114 are also parallel,
The spacing (the inner width of the flat portion 112) and the support bracket 14
0 is substantially equal to the outer width. Also,
A snell wire 1 is provided at the tip end on the axis center of the flat portion 112.
Shaft portion 130 of screw 130 for fixing 20 to flat portion 112
A screw hole 112a through which b is inserted is formed. In addition, the lappet body 110
The pivot holes 113a and 114a into which the pivot 160 is inserted are formed so that the pivot shafts can rotate with respect to the support bracket 140.

The restricting portion 111 is a protruding piece that is provided substantially perpendicularly to the front end of the flat portion 112.
The distance between the side wall 113 and the side wall 113 is substantially equal to the diameter of the straight part 123a of the snell wire 120. The support bracket 140 includes the annular portions 143 and 144 facing each other and the plate-like portion 14 connecting these.
1 and is a substantially U-shaped member. Annular portion 143,
At substantially the center of 144, insertion holes 143b and 144b having flat portions 143c and 144c are formed, and a long columnar support body 50 having a flat portion 50c formed by cutting a part of a cylinder can be inserted. It has become. In addition, the annular portion 14
In the vicinity of the upper base ends of the shafts 3 and 144, there are provided pivot holes 143a and 144a into which the pivots 160 described above are fitted. In the center of the plate-shaped portion 141, a screw hole 141a for inserting a set screw 151 of a hexagon socket screw is formed.

A torsion spring 161 is inserted into the pivot 160, and both ends of the torsion spring 161 are locked to the support bracket 140 and the lappet main body 110. For this reason, the lappet main body 110 is urged to abut on the support bracket 140. By the way, a large number of such lappets 100 are arranged in a ring spinning machine or the like, and each lappet 100 is attached via a support bracket 140 to a support 50 penetrating them. The attachment of the lappet 100 to the support 50 is performed as follows. First, the annular parts 143 and 144 of the support bracket 140 are
c and the flat portions 143c and 144c. Then, a hexagonal nut 150 is provided between the plate-like portion 141 of the support bracket 140 and the support 50, and a set screw 151 is inserted from the screw hole 141a to form the hexagonal nut 15.
0, and the set screw 151 is tightened. Then, rotation is stopped between the flat portion 50c and the flat portions 143c and 144c, and the support bracket 140 is fixed to the support 50.

The lappet 100 thus attached to the support 50 operates as follows. For example, when a thread break occurs, the operator needs to pull out the broken bobbin 40 (FIG. 4) from the spindle to perform a splicing operation. When the lappet body 110 is at the spinning position, the bobbin 4
When pulling out 0, the snell wire 120 gets in the way. Then, the operator puts the lappet body 110 on the torsion spring 161.
The lappet main body 110 is turned upward and retracted against the urging force of FIG. 1 (two-dot chain line in FIG. 1A). In this state, the bobbin 40 is pulled out. In addition, since the lappet main body 110 is in contact with the rear ends of the annular portions 143 and 144 of the support bracket 140 at the rear end, the rotation range is restricted. When the support of the lappet body 110 is released after the work is finished, the spinning force of the torsion spring 161 causes the upper end surfaces of the annular portions 143 and 144 of the support bracket 140 to contact the back surface of the flat portion 112 of the lappet body 110. The lappet body 110 returns to the position by itself. In the case of doffing, the support 50 is rotated clockwise (FIG. 1A) by a rotation mechanism (not shown), and the lappet body 110 is integrally rotated with the support 50 via the support bracket 140. All the lappets 100 are simultaneously moved to the retreat position. When the doffing is completed, the support 50 is rotated in the reverse direction, and all the lappets 100 return to the spinning position all at once.

Next, attachment of the snell wire 120 to the lappet main body 110 will be described. Snell wire 12
0 is outside the mounting portion 123 (specifically, the linear portion 1
23a, outside the bent portions 123b and 123c) and the side wall portion 1
13 and 114 are inserted between the side walls 113 and 114 of the lappet main body 110 such that the insides of the lappets substantially contact with each other. Then, when the screw 130 inserted from the screw hole 112 a of the flat portion 112 is tightened into the square nut 131, the snell wire 12 is inserted between the flat portion 112 and the square nut 131.
No. 0 attachment portion 123 (bent portions 123b, 123c) is sandwiched, and snell wire 120 in which the position of yarn introduction hole 121a is adjusted is fixed to lappet main body 110.

At this time, as described above, the side wall 11
3 and 114, and the width of the mounting portion 123 and the square nut 131 are substantially equal.
And the square nut 131 are restrained by the side wall portions 113 and 114. Accordingly, the snell wire 120 can be securely fixed without causing a position shift, and its position is stably held even after the fixing, and the position is not shifted by a slight impact or the like. In addition, since the restraint of the square nut 131 by the side walls 113 and 114 functions as a rotation stopper,
The snell wire 120 can be efficiently attached to the lappet main body 110.

In this embodiment, since the straight portion 123a of the mounting portion 123 is substantially in contact with and sandwiched by both the side wall portion 113 and the regulating portion 111, the snell wire 12
0 is more stably held. It is also advantageous in suppressing vibration on the tip side of the snell wire 120 during operation of the ring spinning machine or the like. Further, in the present embodiment, the shaft portion 130b of the screw 130 is
b, 123c, between the bent portions 123b, 123c.
The inside of c and the shaft portion 130b are substantially in contact with each other. As a result, the bent portions 123b and 123c of the snell wire 120 are substantially sandwiched between the shaft portion 130b and the side wall portions 113 and 114, and the attachment position of the snell wire 120 is further stably held. . In addition, since these position restrictions exist, the Snell wire 1
Even when the position of the yarn introduction hole 121 a of the second embodiment is readjusted, the position of the snell wire 120 does not cause a problem in the left-right direction with respect to the lappet main body 110.

Next, another embodiment of the lappet according to the present invention will be described below with reference to FIGS. The same components as those in FIG. 1 are denoted by the same reference numerals. Regulator 111
When the regulating portion 211 shown in FIG. 2A is provided instead, the range where the straight portion 123a of the snell wire 120 substantially abuts on the regulating portion 211 is expanded, and the position of the snell wire 120 can be held more stably. . Also, if a regulating portion 311 shown in FIG. 2B is provided instead of the regulating portion 111, the regulating portion 311 becomes bent portions 123 b and 123 of the snell wire 120.
The position of the snell wire 120 can be more stably held by substantially abutting the inside of the inside 3c.

As shown in FIG. 3, which shows a cut surface at the center of the screw 130, a square nut 431 having a tapered upper part is used in place of the square nut 131 described above to attach the mounting portion 123 of the snell wire 120. You may attach to lappet main body 110. When the mounting portion 123 is tightened by the fixing tool including the square nut 431 and the screw 130,
As the tightening is performed, the interval between the bent portions 123b and 123c increases, and the outside of the bent portions 123b and 123c and the inside of the side wall portions 113 and 114 come into contact with each other reliably,
Even slight rattling of the snell wire 120 can be eliminated, which is convenient for stably maintaining the position.

In this embodiment, a square nut is used as a part of the fixing tool. However, a general hexagon nut may be used. In this case, the width between the two faces of the hexagon nut and the inner space between the side wall portions are substantially equal. It is better if you also stop it. Further, the lappet body is pivotally supported by the support bracket so as to be indirectly rotatable with respect to the support. However, the side wall on the base end side of the lappet body is lowered (below FIG. 1A). When a support is inserted through the through hole and the support is inserted into the through hole, the support can be directly rotated with respect to the support.

The mounting of the lappet body to the support bracket is performed by using a set screw and a hexagonal nut. When a solid support bracket made of cast metal is used, a female screw penetrating therethrough is directly provided. A set screw may be screwed onto the female screw to fix the support bracket to the support. In order to easily adjust the position of the yarn introduction hole 121a of the snell wire, for example, a screw rack type snell wire and a lappet body may be used. Further, as described above, the snell wire can be easily manufactured by bending a wire, and the lappet body and the support bracket can be easily manufactured by pressing a steel plate.

[0024]

According to the lappet of the present invention, since the snell wire is securely restricted by the lappet main body, the mounting position can be stably held.

[Brief description of the drawings]

FIG. 1 is a view showing one embodiment of a lappet according to the present invention, FIG. 1 (a) shows a front view thereof, and FIG. 1 (b)
Shows the bottom view.

FIG. 2 is a diagram showing another embodiment according to the lappet of the present invention.

FIG. 3 is a diagram showing another embodiment according to the lappet of the present invention.

FIG. 4 is a view showing a part of a conventional ring spinning machine using a lappet.

FIG. 5 is a bottom view showing a mounting positional relationship between a snell wire and a lappet body in a conventional lappet.

[Explanation of symbols]

 Lappet 100 Snell wire 120 Spiral part 121 Attachment part 123 Ruppet main body 110 Side wall part 113, 114 Restriction part 111 Fixture 130

Claims (3)

[Claims] 1. A snell wire having a spiral portion having a yarn guide hole on the distal end side for guiding a yarn, and a mounting portion extending substantially linearly from the spiral portion and bending substantially U-shaped at a proximal end side, A wrappet body, wherein the snel wire is fixed by a fixture at the mounting portion and is rotatably supported directly or indirectly on a support body. Characterized in that it has side walls on both sides substantially contacting the wrappet. 2. The lappet according to claim 1, wherein the lappet main body is provided with a restricting piece on a tip end side for substantially holding the mounting portion of the snell wire between the wrappet body and the side wall portion. 3. The lappet according to claim 1, wherein the mounting portion of the snell wire is substantially sandwiched between the shaft portion of the fixture and the side wall portion.