JPH049211B2 - - Google Patents

Description

Detailed Description of the Invention (Industrial Field of Application) The present invention relates to a belt-crossing type false twisting unit, and more particularly, to a belt that twists a yarn by passing the yarn between a pair of belts that run crosswise to each other. This invention relates to a cross-type false twisting unit.

(Prior Art) As such a belt crossing type false twisting unit, for example, there is one disclosed in Japanese Utility Model Publication No. 56-8934.

Generally, in a belt crossing type false twisting unit,
Since the yarn always passes parallel to the diagonal line of the diamond-shaped intersecting plane between a pair of false twisted belts that intersect with each other, the yarn outlet of the yarn guide must be placed on the extension line of the diagonal line, and the yarn outlet will deviate from the extension line. The twisting stroke length of the yarn, that is, the nip length of the yarn, becomes shorter.
The yarn is not sufficiently twisted. On the other hand, the position of the yarn guide on the downstream side of the pair of false twisting belts does not necessarily have to be on an extension of the diagonal line, but does not affect the length of the yarn false twisting stroke. For this reason, when changing the intersection angle of a pair of false-twisted belts to change the number of twists, it is necessary to All you have to do is rotate it symmetrically with respect to the thread path. However, in order to rotate two belts simultaneously, the structure of the unit becomes complicated. For this reason, in the conventional belt crossing type false twisting unit disclosed in the above-mentioned publication, only one belt is rotated about the intersection of two diagonal lines of the rhombic crossing surface as a fulcrum.

However, in such a conventional belt crossing type false twisting unit, even if the crossing angle of a pair of false twisting belts that intersect with each other is changed, the yarn passes on the diagonal of the diamond-shaped intersecting plane between the belts. In order to do this, the thread guide must be rotated at the same time as one of the belts is rotated, which poses a problem in that the structure of the entire unit becomes complicated.

(Objective of the Invention) Therefore, the present invention provides that even if the crossing angle of a pair of false-twisted belts that intersect with each other is changed, the yarn always travels on the diagonal of the diamond-shaped intersecting plane between the belts without changing the position of the yarn guide. The purpose is to prevent the desired false twisting from being insufficiently performed due to the shortening of the length of the twisting stroke of the yarn, and to simplify the structure of the unit.

(Structure of the Invention) The belt crossing type false twisting unit according to the present invention comprises a pair of false twisting belts that intersect each other at a predetermined angle and run together toward the downstream side of the yarn, and the predetermined angle is variable. A belt-crossing false twisting device comprising a yarn guide provided upstream of the twisting belt, in which the yarn is nipped between a pair of false twisting belts and the yarn is twisted by passing through the intersecting plane between the pair of false twisting belts. The unit is configured to rotate one of the pair of false twisting belts about the yarn outlet of the yarn guide as a fulcrum to change the intersecting angle of the pair of belts.

(Function of the invention) As shown in FIG. 8, one 76 of the pair of mutually intersecting false twist belts 76 and 102 is positioned at a position indicated by a two-dot chain line with a point O corresponding to the yarn supply port 104a of the yarn guide 104 as a fulcrum. When the belt 76' is rotated in the direction of arrow Z until it reaches the point O, the distance from point O to the belt 76' after rotation becomes the same as the distance R before rotation, and the distance from point O to belt 76' is the same as the distance R before rotation.
The distance R from to the belt 102 is also the same.
The distance from point O to belt 76' after rotation is point O.
The distance from the point O to the belt 102 is the same as that of the belt 102, which means that even if the belt 76 rotates and changes the intersection angle of the pair of belts, the point O is again the diagonal of the diamond-shaped intersection plane between the belts, as will be explained in detail later. It will be located on an extension of the For this reason, the thread guide 104
There is no need to move the unit as in the conventional case, and the structure of the unit can be simplified.

(Example) Hereinafter, an example of the present invention will be described based on the drawings. 1 to 8 are diagrams showing a belt crossing type false twisting unit according to an embodiment of the present invention.

First, to explain the structure, in FIG. 1, 10 is a belt-crossing type false-twisting unit. Typically 200 along the running direction of the drive belt 12
They are arranged in a row. The belt-crossing type false twisting unit 10 has a touch roller 14 that is rotationally driven in frictional contact with a drive belt 12.
As shown in FIG. 2, this touch roller 14 is provided at the lower end of a shaft 16 extending in the vertical direction in the figure. The shaft 16 is connected to the first frame 1
8, the bearing 2 is attached to the boss portion 20 provided at the bottom in the figure.
It is rotatably supported via 2. The first frame 18 is fixed to a frame 24 of a false-twisting machine main body (not shown), and further includes a bottom plate 18a. A first toothed pulley 26 is provided above the bottom plate 18a of the shaft 16 in the drawing, and a fourth toothed pulley 28 is further provided at the upper end portion of the shaft 16 above the toothed pulley 26 in the drawing. There is. A first toothed belt 30 that is endless and has teeth on its back surface is connected to the drive belt 12 of the first toothed pulley 26.
The first toothed belt 30 is wound so as to extend in the horizontal direction at a substantially right angle to the belt, and the first toothed belt 30 is wound so as to extend in the vertical direction at a substantially right angle in the middle by two second toothed pulleys 32. After being bent, it is wound around the third toothed pulley 34. Second toothed pulley 3
2 is rotatably supported by a shaft 36,
The end of the shaft 36 is inserted into a first arcuate groove 18b formed in the first frame 18. As shown in FIG. 3, the shaft 36 is integrally fixed to one end of a lever 38.
A first pin 40 rotatably supported by the first frame 18 is fixed to the other end. Lever 3
A second pin 42 is integrally fixed to one end of the first frame 18 .
One end of a spring 46 is connected to a third pin 44 provided at the position shown in FIG. 2 so as to protrude toward the lever 38 side. A second frame 50 is provided on the second toothed pulley 32 side of the first frame 18 so as to be rotatable about a fourth pin 48. When the second frame 50 is not rotated, it is shown in FIG. As shown, bolt 52, nut 5
4 and the second frame 50 via the washer 55
is fixed to the first frame 18. bolt 5
2 is fixed to the second frame 50, and when the second frame 50 rotates, the second arc groove 18c formed in the first frame 18 is fixed to the second frame 50.
At the same time, it rotates about the fourth pin 48 as a fulcrum. Further, a fifth pin 56 is fixed to the first frame 18 side of the second frame 50, and when the second frame 50 rotates as shown in FIG. The third arcuate groove 18d formed in
The inner portion rotates around the fourth pin 48 as a fulcrum. Shaft 3
6 of the first frame 18 side end and the fifth pin 56
The distal end portions of the rotating ring 60 are rotatably supported on the opposite side of the second frame 50 of the first frame 18 via the sixth pin 58, and are connected to the first elongated hole 60a and the second elongated hole 60b. It is inserted in each. The second frame 50 has an upper end that projects upwardly in the figure from the first frame 18 and a lower end that projects upwardly in the figure from the first frame 18, and shafts 62 and 64 are provided at these upper and lower ends, respectively. It is rotatably supported. That is, as shown in FIG. 5, there is a recess 50a on the upper end side of the second frame 50.
is defined in a U-shape, and a shaft support member 66 that rotatably supports the shaft 62 is housed within this recess 50a. The shaft support member 66 has two sliding holes 6 into which two sliding pins 68 fixed to the upper end of the second frame 50 are inserted.
A spring 70 that elastically presses the shaft support member 66 upward is interposed between the lower end of the shaft support member 66 and the lower end of the recess 50a. At one end of the shaft 64, a third
A toothed pulley 34 is fixed, and a pulley 72 is fixed to the other end. A pulley 74 is also fixed to the tip of the shaft 62, and a false twisting belt 76 is wound between the pulleys 72 and 74. A predetermined tension is applied to the false-twisted belt 76 by the elastic pressing force of the spring 70. A shaft support 78 is fixed on the bottom plate 18a of the first frame 18, and a shaft 80 is rotatably supported on the shaft support 78 parallel to the shaft 16. A fifth toothed pulley 82 is fixed to the distal end of the shaft 80, a pulley 84 is fixed to the intermediate part thereof, and a second toothed pulley 82 is fixed between the fourth toothed pulley 28 and the fifth toothed pulley 82. A belt 86 is wrapped around it. In FIG. 5, a bracket 88 is provided at the right end of the bottom plate 18a of the first frame 18 in the figure, and this bracket 88 has two rods that protrude horizontally toward the shaft support 78 (see FIG. 6). A sliding pin 90 is provided. Two sliding holes 94 formed in a shaft support member 92 fit into the sliding pin 90 to support the shaft support member 92, and a spring is inserted between the shaft support member 92 and the shaft support base 78. 96 is interposed to form the shaft support member 92
is elastically pressed against the bracket 88 side. A shaft 98 is rotatably provided on the shaft support member 92 horizontally with the shaft 80, and a pulley 100 is fixed to the tip of the shaft 98. A false-twisted belt 102 having the same width as the false-twisted belt 76 is connected between the pulleys 100 and 84 by a spring 9.
A predetermined tension is applied by the elastic pressing force of No. 6. A false-twisting belt 102 is wound around the false-twisting belt 102, and the false-twisting belt 102 intersects with the false-twisting belt 76 at a predetermined angle θ, and as shown in FIG. and
Both are running toward the downstream side of the thread 106.
As shown in FIGS. 5 and 6, false twist belts 76 and 10
A thread guide 104 is provided near the intersection with 2 and fixed to a stationary member (not shown). The yarn guide 104 has a through-hole formed in the axial portion thereof, through which the yarn 106 to be falsely twisted is placed. In FIG. 5, the thread 106 is fed from the upstream side in the upper right corner of the figure, and the thread guide 106
It passes through the through hole 4 and is supplied to the downstream side, and is then nipped and passed on the diagonal line of the diamond-shaped intersecting plane between the false twisting belts 76 and 102 to be false twisted, and then is fed to the downstream side at the lower left in the figure. will be sent to. As shown in FIG. 8, the thread guide 104 is arranged so that the positions of the thread guide 104 and the exit 104a of the thread 106 coincide with the axis of the fourth pin 48.

Next, the effect will be explained. When the drive belt 12 of the false-twisting machine main body (not shown) runs in the direction of the arrow in FIG. 6, the touch roller 14 is driven and rotated, and the first toothed pulley 26 also rotates together. The first toothed belt 30 is driven and runs by the rotation of the first toothed pulley 26, and the running direction of the first toothed belt 30 is changed by the second toothed pulley 32, and the third toothed belt 30 is driven to run.
The toothed pulley 34 is driven and rotated. As the third toothed pulley 34 rotates, the pulley 72 also rotates,
As the pulley 72 rotates, the false twist belt 76 interposed between the pulley 74 and the pulley 74 is driven and runs.
Its running direction is downward in the figure at the intersection with the false-twisted belt 102. On the other hand, the fourth toothed pulley 2
8 rotates together with the touch roller 14, and rotates the fifth toothed pulley 82 via the second toothed belt 86. The pulley 84 rotates together with the fifth toothed pulley 82, and the rotation of the pulley 84 causes the pulley 100 to rotate.
The false-twisted belt 102 interposed between the false-twisted belt 102 and the false-twisted belt 76 is driven and runs, and its traveling direction is to the left in FIG. 5 at the intersection with the false-twisted belt 76.
In FIG. 5, the yarn 106 sent from the upstream side in the upper right corner of the figure is guided by the yarn guide 104 and supplied to the downstream side from the outlet 104a of the yarn 106.
It is nipped between the false twisting belts 76 and 102 on the downstream side and is false twisted by passing therebetween. At this time, as shown in FIG.
passes on the diagonal line (AC) of The reason for this is as follows.

In ΔOAF and ΔOAG, OF=OG=R, ∠
OFA=∠OGA=90°, OA is common, therefore, AF=
AG ^{= √2−2} . Therefore, ΔOAF and ΔOAG
are congruent, and ∠OAF=∠OAG=θ/2. Similarly, in ΔOCH and ΔOCI, since FH=GI, OH=OI=R+W, ∠OHC=∠OIC=90°,
OC is common, so HC=IC=√ ² − (+) ² .
Therefore, ΔOCH and ΔOCI are congruent and ∠
OCH=∠OCI. Also, in ΔOAF and ΔOCH, ∠OAF=∠OCH=90°, ∠AOF=∠
Since COH=common, both are similar. Therefore, since ∠COH=∠OAF=θ/2, ∠OCH=∠ also for ΔOCH and ΔOCI.
OCI=θ/2. From the above, OA and OC
is a straight line, and the thread 106 passes on the diagonal line (AC) of the diamond-shaped intersecting plane (ABCD). Since θ is an arbitrary angle, the false-twisting belt 76 is rotated by an arbitrary amount in the direction of arrow Z (or in the opposite direction) using point O as a fulcrum, and reaches the position 76' shown by the two-dot chain line. It also holds true when . That is, the false-twisted belt 76' and the false-twisted belt 102 form a new diamond-shaped intersecting plane (A'B'C'D').
For the same reason as mentioned above, the thread 106 always crosses the diagonal line (A'C') of the new rhombus (A'B'C'D') at the position 106' indicated by the two-dot chain line. I will pass. Therefore, the length of the yarn twisting stroke can be maintained at the longest length at all times, so that the desired false twisting can be sufficiently performed. In order to increase the angle θ at which the false twisting belts 76 and 102 intersect from the substantially right angle state shown in FIG. 2, the second frame 50 is tilted as shown in FIG. To do this, first loosen the nut 54 shown in FIG. 2 to tilt the second frame 50 as shown in FIG. 7, and then tighten the nut 54 again to fix the second frame 50 to the first frame 18. At this time, the second frame 50 is connected to the fourth pin 48.
As described above, the false twisting belt 76 is rotated around the axis of the fourth pin 48, that is, the outlet 104a of the yarn 106 of the yarn guide 104.
It can be rotated using the position as a fulcrum. When the second frame 50 rotates, the fifth pin 56 slides within the third arcuate groove 18d of the first frame 18, causing the rotation link 60 to rotate about the sixth pin 58 as a fulcrum. When the rotation link 60 rotates, the shaft 36 in the first elongated hole 60a is slid in the first arc groove 18b of the first frame 18, and the lever 38
is rotated about the first pin 40 as a fulcrum. At this time, the second toothed pulley 32 supported by the shaft 36 at one end of the lever 38 also rotates about the first pin 40 as a fulcrum. As a result, the second frame 5
When the third toothed pulley 34 supported at 0 rotates together with the second frame 50, the third toothed pulley 34 is engaged with the first toothed belt 30 and rotates with the second frame 50.
It is possible to prevent the rotation of 0 from being obstructed. At this time, the lever 38 rotates via the second pin 42 against the elastic tension of the spring 46, but when the lever 38 tries to return to its original position, it is easily rotated by the elastic tension of the spring 46. Can return.

In this embodiment, when one of the pair of false-twisted belts 76 and 102 is rotated about the outlet 104a of the yarn 106 of the yarn guide 104, the yarn 106 is rotated between the false-twisted belts 76 and 102.
02 is different from before the false twist belt 76 is rotated, but as mentioned above, this affects the fact that the yarn 106 passes on the diagonal of the diamond-shaped intersecting plane between the belts. Never.

(Effects of the Invention) As explained above, according to the present invention, by configuring one of the pair of false-twisting belts to be rotated using the yarn supply port of the yarn guide as a fulcrum, the intersection angle of the false-twisting belts is Even if the thread guide is changed, the thread can always pass diagonally across the diamond-shaped intersecting plane between the belts without changing the position of the thread guide, ensuring a sufficient length of the thread twisting stroke. In addition to ensuring sufficient false twisting, the structure of the entire unit can be simplified.

[Brief explanation of drawings]

1 to 8 are diagrams showing a belt crossing type false twisting unit according to an embodiment of the present invention, in which FIG. 1 is a schematic perspective view showing its drive system, FIG. 2 is a front view thereof, and FIG. is a sectional view taken along the line B-B in FIG.
Figure 4 is a sectional view taken along the line A-A in Figure 2;
6 is a plan view thereof, FIG. 7 is a schematic front view showing the state in which the false-twisting belt 76 is rotated, and FIG. 8 is a diamond-shaped intersection of a pair of false-twisting belts showing its operation. It is a schematic diagram explaining the arrangement relationship of a surface, a thread guide, and a thread. 10... Belt crossing type false twisting unit, 76,1
02...false twist belt, 104...yarn guide, 10
4a... Thread exit, 106... Thread.

Claims (1)

[Claims] 1 A pair of false twisting belts that intersect with each other at a predetermined angle and both run toward the downstream side of the yarn, the predetermined angle being variable, and a yarn guide provided upstream of the false twisting belt, In a belt-crossing type false twisting unit that twists the yarn by passing through the intersecting plane between the pair of false twisting belts, one of the pair of false twisting belts is connected to the yarn of the yarn guide. A belt crossing type false twisting unit characterized in that the crossing angle of a pair of belts is changed by rotating using the exit as a fulcrum.