JPS6367569B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a false twisting and crimping machine for two or more fiber yarns consisting of a core yarn and a sheath yarn. 10~
300% intermittent overfeed to entangle,
When forming a slab-like multilayer winding part intermittently, the vertical position and speed of the intertwining point of each sheath yarn with respect to each core yarn are the same for each set of 10 to 20 sheath yarns. In addition, by making complex changes,
Strong multi-layer winding parts of various shapes can be made as designed.
Moreover, the present invention relates to an apparatus for producing special false-twisted crimped yarn having a complicated distribution. Conventionally, in the false twisting and crimping machine that produces this type of slub-like false twisted yarn, the representative
No. 28258, Japanese Patent Publication No. 45-28018, etc., when performing false twisting on multiple thermoplastic fiber yarns, the yarn feeding speed and yarn feeding tension of each fiber yarn are varied and the twisting area outside the heater is In this method, the above-mentioned fiber threads are intertwined and the positions of the feeding points are varied to form intermittent slabs. In both cases, false twisted yarns with a slub-like shape can be obtained, but they have drawbacks such as poor cohesiveness and the slub-like portions flowing or collapsing in the subsequent product manufacturing process, as well as the core yarn coming loose. It was hot. In addition, Japanese Patent Publications No. 45-16895 and Japanese Patent Publication No. 47-50338 disclose a method of obtaining slub-like false twisted yarn by intermittently changing the feeding speed, feeding tension, or position of the entanglement point of the sheath yarn. In both cases, after the sheath yarn is false-twisted with a relatively small supply tension, the processed yarn is rubbed in the false-twisting/untwisting area and the sheath yarn is intermittently gathered to obtain a slab-like false-twisted yarn. It is something. As a result, the sheath yarn becomes slack and a slub-like portion is formed, and although the slub-like portion is soft and bulky, the core yarn and sheath yarn are separated, resulting in poor bundling and difficulty in handling. Therefore, it is necessary to improve the cohesiveness of the false-twisted yarn by gluing it, twisting it, or wrapping it with another yarn in a subsequent process, which has the drawback of significantly reducing economic efficiency. Ta. In addition, in the conventional method of manufacturing slub-like false twisted yarn, the entanglement point of the core yarn and sheath yarn is located outside the heater, so not only is it impossible to obtain a strong slub-like part, but also the above-mentioned Since the position of the entanglement point is different for each heater, there is a drawback that the length, shape, and distribution of the slab-like portion formed by each heater are not equal. Therefore, on the surface of woven or knitted fabrics manufactured using such slub-like false twisted yarns, the slub-like portions tend to be extremely rough or dense, and the woven fabric produced The disadvantages were that the appearance of the knitted fabric was significantly impaired and defective fabrics were produced. The present invention has been made for the purpose of improving the above-mentioned drawbacks of the conventional art, and will be described in detail with reference to examples as follows. That is, as shown in Figs. 1 and 2, in the false twist crimp processing machine, 1 is a package of the core yarn 2, 1' is a package of the sheath yarn 2', 3, 3' is a guide, 4,
4' is a delivery roller, 5 is a first heater, 6
is the entanglement point of the core yarn 2 and sheath yarn 2' in the first heater, 7 is the special false twisted crimped yarn in a false twisted state, 8 is the false twisting device, 9 is the delivery roller, 10
is the second heater, 11 is the delivery roller, 12
is the winding bobbin, with 10 to 20 pieces each.
One guide rod 21 is provided horizontally close to the heater 5, and each thread guide 22 attached to this guide rod 21 is placed close to the gap 23 provided in the vertical direction of each first heater 5, and Two guide rollers 24, 24' are installed close to each other in the center of a horizontal rod 17 that connects the upper ends of two slide bars 18, 18' that can freely slide in the direction of the slide bars 18, 18'.
The guide bars 20 and 20' are respectively fixed to the lower ends of the guide rod 21, and the guide bars 20 and 20' are respectively fixed to both ends of the guide rod 21.
The other end of the swinging lever 15, whose one end is pivotally connected to the frame by a support shaft 16, is connected to the guide rollers 24, 24'.
A crank 27 is inserted between the induction motor 13 and the transmission 26 and is attached to the shaft of the induction motor 13.
Alternatively, the swinging lever 15 is swung by the cam 14 to simultaneously move up and down 10 to 20 threaded guides 22 while changing the speed, and the descending speed of these threaded guides 22 is S ₁ (m/min).
is slightly lower than the descending speed S ₀ (m/min) of the core yarn 2, and the sheath yarn 2' is lowered for a very short time while following the conditions below. They are entangled in the first heater 5 to form a multilayer winding part, S ₁ =S ₀ -ND/i 1<i<8 preferably 2<i<5 where N is the value of the false twist crimping machine. Twisting speed (T/
min) D is the diameter of the sheath yarn (μ), i is the number of winding layers of the sheath yarn, T is the number of winding layers of the sheath yarn with respect to the core yarn, and the thread when forming a non-multilayer winding part of the sheath yarn 2' with respect to the core yarn 2. Guide descending speed S ₂ (m/
min) Rising speed S ₃ (m/min) is S ₂ = S ₀ -N/C ₂ , -S ₃ = S ₀ -N/C ₃ N/S ₀ C ₂ 1/D, N/S ₀ + ( S ₃ ) _nax C ₃ <N
/S ₀ where C ₂ is the winding density of the sheath thread when the thread guide is lowered (T/m) C ₃ is the winding density of the sheath thread when the thread guide is raised (T/m) (S ₃ ) _nax is the thread density A special false-twisted crimped yarn manufacturing apparatus characterized in that the guide has a maximum rising speed (m/min) and that the induction motor 13 can be speed-changed in an extremely complicated manner according to the design of the transmission device 26 described above. be. Note that 25 is a friction roller attached to the swing lever 15;
28 is a connecting rod that connects the crank 27 and the swinging lever 15, 29 is a connecting pin, and 30 is the swinging lever 15.
This is an anti-vibration weight to smooth the swing of the machine. Since the present invention is configured as described above, it has the following functions and effects. When false twisting and crimping two or more fiber yarns consisting of a core yarn 2 and a sheath yarn 2', the core yarn 2 is run at a predetermined speed through the first heater 5 while applying some tension. The sheath yarn 2' to be entwined with the core yarn 2 is intermittently overfed by 10 to 300%, preferably 50 to 150%. Since a vertically long gap 23 is provided on the side surface of each of the first heaters 5, the above-mentioned sheath yarn is inserted from the side in the vicinity of the core yarn 2 running at a constant speed in each of the first heaters 5. 2' are each sent out through the thread guide 22, and each
It passes through the gap 23 of the heater 5 and is entangled with each of the above-mentioned core threads 2 within each first heater 5 . The vertical position and speed of the intertwining point 6 of each of the core yarn 2 and sheath yarn 2' are the same for each set of 10 to 20 sheath yarns 2' of the false twist crimping machine. 10 to 20 first heaters 5 each.
As a group, one heater is placed near these first heaters 5.
Each guide rod 21 is provided horizontally, and each thread guide 22 attached to the guide rod 21 is placed adjacent to a gap 23 provided in the length direction of each first heater 5. Therefore, each of the core threads 2 running inside these first heaters 5
The vertical position and speed of the entangling point 6 of each sheath thread 2' entangled with the sheath thread 2' are almost equal to the vertical position and speed of the thread guide 22. Note that the induction motor 13 is connected to a transmission device 26 designed in advance so as to have extremely complicated speed changes.
Since this motor 13 is electrically connected to
By the rotation of the crank 27 or the cam 14 attached to the shaft, the swing lever 15 moves up and down in a very complicated manner with the support shaft 16 as the fulcrum as designed. Therefore, since the slide bars 18, 18' move up and down in the same way, the guide rod 21 and thread guide 22 also move up and down. Moreover, since the thread guide 22 is provided close to the core thread 2 running inside the first heater 5, the sheath thread 2' passing through the thread guide 22 is not entangled with the core thread 2 inside the first heater 5. The vertical position and velocity of point 6 change to be equal to the vertical position and velocity of thread guide 22. Moreover, the sheath thread 2' is 10 to 20
Each book is passed through each thread guide 22 of one guide rod 21 as a set, and moves up and down in the same way as this thread guide 22. The changes in position and speed are exactly the same for every 10 to 20 first heaters 5. Note that the tip of the swing lever 15 is connected to the slide bar 1.
The slide bars 18, 18 are fitted between the guide rollers 24, 24' attached to the center of the horizontal rod 17 connected to the upper ends of the slide bars 18, 18'. ' moves up and down. Guide rollers 24, 24' and swing lever 1
Since the position of the contact point 5 can be easily changed by the swinging of the swinging lever 15, the swinging of the swinging lever 15 and the vertical movement of the slide bars 18, 18' can be smoothly linked. Therefore, even if the supporting members 19, 19' of the slide bars 18, 18' are fixed to the frame,
The vertical sliding of the slide bars 18, 18' is carried out correctly and smoothly at predetermined positions. Therefore, since the slide bars 18, 18' do not move back and forth due to the swing of the swing lever 15,
Entanglement point 6 of each sheath thread 2' for each core thread 2
There is no possibility that the vertical position and speed of the thread guide 22 will be different from the position and speed of the thread guide 22. Note that 30 is a vibration-proofing weight for smoothing the swinging of the swinging lever 15. Therefore, in a false twisting and crimping machine having a very large number of spinners, each set of 10 to 20 heaters 5 is equipped with the guide rod 21 as described above, and each thread guide 22 is connected as described above. By moving up and down with the device, the various lengths and shapes of the multilayer winding parts of the special false-twisted crimped yarn produced from all the spinners of the false-twisted crimping machine, as well as their distribution, can be made almost the same. It can be done. Each of the core yarns 2 and sheath yarns 2' entangled in each of the first heaters 5 is false-twisted within each of the first heaters 5, so that each of the sheath yarns 2' has a It is tightly wound around the thread 2. Moreover, when the multilayer winding part is about to be formed, the sheath thread 2' is overfed by a predetermined amount of 10 to 300%, preferably 50 to 150%, and the predetermined amount is dependent on the length of the multilayer winding part. It is determined by the thickness and its distribution density. Each sheath yarn 2' that is overfed by a predetermined amount is wound around each core yarn 2 running in each first heater 5 with sufficient tension due to the frictional resistance between it and the thread guide 22. Therefore, there is no possibility that loop-like hairs will be formed on the outer periphery of the multi-layer winding portion due to the sheath threads 2'. The core yarn 2 and sheath yarn 2' entangled in each of the first heaters 5 are partially heat-set in each of the first heaters 5 to become special false twisted and crimped yarns 7. It passes through the false twisting device 8, passes through the delivery roller 9, and is fed into each second heater 10. After being fixed in shape after false twisting and crimping in each of the second heaters 10, the winding bobbins 1 are pulled out and passed through a delivery roller 11 to each winding bobbin 1.
It is wound up in 2. In this way, a multilayer winding part and a non-multilayer winding part are formed of the special false twisted crimped yarn. Changes in the vertical position and speed of the thread guide 22 in this case will be explained in detail. Then, the result is as follows. Let dt (min) be the time during which the sheath yarn 2' travels through the minute section length dl (m) of the core yarn 2 while winding it around the core yarn 2, and the winding of the sheath yarn 2' in this section dl (m). Density is C (T/m), entanglement point 6 of sheath yarn 2' with core yarn 2
If the descending speed of the thread guide 22 is S (m/min), then dl = (S ₀ − G) dt C = N・dt/dl Here, S ₀ is the running speed of the core thread (m/min). min) N is the false twisting speed of the false twisting crimping machine (T/min) T is the number of windings of the sheath yarn with respect to the core yarn Therefore, from the above formula, S = S ₀ −N/C (1) For the core yarn 2 In the non-multilayer winding part of the sheath thread 2', the number of winding layers of the sheath thread 2' wound around the outer periphery of the core thread 2 is one, and C is the number of layers of the sheath thread at each position of the core thread 2. 2' winding density (T/m) is shown. In the multi-layer winding part of the sheath yarn 2' around the core yarn 2, the number i of the sheath yarn 2' wound around the outer periphery of the core yarn 2 is i>1, and 1 of the sheath yarn 2' is If the winding density of each layer is C ₀ (T/m), the winding density of the sheath thread 2' in the multilayer winding part is iC ₀ (T/m).
m). In the multi-layer winding section, the sheath threads 2' are wound in contact with each other, so the diameter of the sheath threads 2' is set to D.
(μ), then C ₀ = 1/D (2) C = iC ₀ = i/D (3) Therefore, in the multilayer winding part, the entanglement point 6 of the sheath yarn 2' with respect to the core yarn 2 is lowered. The speed, that is, the descending speed S ₁ (m/min) of the thread guide 22 is (1) (3)
According to the formula, S ₁ =S ₀ -ND/i (4) In the present invention, the number i of winding layers of the sheath thread 2' in the multilayer winding portion is limited as follows. 1<i<8 Preferably 2<i<5 (5) The multi-layer winding portion of the sheath yarn 2' around the core yarn 2 has a lowering speed of the entanglement point 6 of the sheath yarn 2' with respect to the core yarn 2 as described above. , that is, the descending speed of the thread guide 22
S ₁ (m/min) is the descending speed of the core thread 2 as shown above.
It is formed by slightly smaller than S ₀ (m/min). Since the non-multilayer winding portion of the sheath yarn 2' relative to the core yarn 2 is formed by the vertical movement of the thread guide 22, the core The descending speed S ₂ (m/min) of the entanglement point 6 of the sheath thread 2' with respect to the thread 2 is calculated from equation (1) as follows: S ₂ = S ₀ −N/C ₂ (6) Here, C ₂ is the descending speed of the thread guide. The winding density (T/m) of the sheath yarn when 2' maximum descending speed (S ₂ ) _nax (m/min)
is obtained by substituting i=1 into equation (4). (S ₂ ) _nax = S ₀ −ND (7) At this time, the maximum value (C ₂ ) _nax (T/m) of the winding density C ₂ (T/m) of the sheath thread 2′ is (C ₂ ) _nax = 1/D (8) When the descending speed S ₂ (m/min) of the entanglement point 6 of the sheath yarn 2' is 0, the winding density of the sheath yarn 2' with respect to the core yarn 2 is
C ₂ (T/m) is (C ₂ )S ₂ =0=N/S ₀ (8') In the non-multilayer winding part formed by the rise of the entanglement point 6, the sheath yarn relative to the core yarn 2 2' entanglement point 6
The rising speed S ₃ (m/min) of the thread guide is calculated from equation (1) as follows: −S ₃ =S ₀ −N/C ₃ (9) Here, C ₃ is the winding density of the sheath yarn (T /m) When the rising speed S ₃ (m/min) of the entangled point 6 is 0, from equation (9), (C ₃ )S ₃ =0=N/S ₀ (10) The rising speed of the entangled point 6 When S ₃ (m/min) is the maximum value (S ₃ ) _nax (m/min), the winding density of the sheath yarn 2'
C ₃ (T/m) is the minimum value (C ₃ ) _nio (T/m) (in text
min indicates the minimum value) and is given by (C ₃ ) _nio = N/S ₀ + (S ₃ ) _nax (10') from equation (9). The case where a crank mechanism as shown in FIG. 2 is used as a mechanism for moving the thread guide 22 up and down will be described in detail as follows. According to the design of the transmission 26, the induction motor 13 rotates at variable speeds, but for ease of discussion, it is assumed that the rotational angular velocity ω (rad/min) during one rotation is equal. The connecting pin 29 connecting the connecting rod 28 and the swinging lever 15 and the support shaft 1 of the swinging lever 15
Length m ₁ (m) between 6 and length a (m) of connecting rod 28
If it is made sufficiently longer than the length r (m) of the crank 27, the vertical speed υ of the connecting pin 29 will be
(m/min) is given by the following formula. υ=r(sinθ+n/2sin2θ)ω (11) Here, θ is the rotation angle of the crank (rad) n=r/a≪1 Length between the support shaft 16 of the swing lever 15 and the connecting pin 29 m ₁ ( Since the length r(m) of the crank 27 is sufficiently long compared to the length r(m) of the crank 27, the movement of the other end of the swing lever 15 at the point where it contacts the guide rollers 24, 24' can be regarded as approximately a linear movement in the vertical direction. I can do it. Therefore, the vertical speed S (m/min) of the thread guide 22, which moves up and down due to the vertical sliding of the guide bar 18, is given by the following equation. S=kυ=kr(sinθ+n/2sin2θ)ω(12) Here, k is the magnification ratio by the swing lever (k≒
m ₂ /m ₁ ) m ₂ is the length (m) from the contact point of the swing lever and guide roller to the support shaft. Therefore, the descending speed of the thread guide 22 when the multilayer winding part is formed S ₁ ( m/min) becomes S ₁ =kr(sinθ+n/2sin2θ)ω (13). Therefore, the following equation can be obtained from equations (4) and (13). kr(sinθ+n/2sin2θ)ω=S ₀ −ND/i (14) In the present invention, the number of winding layers i of the sheath yarn 2' of the multilayer winding portion formed is 1<i<8, preferably 2<i< 5 (5), the angular velocity ω (rad/
You just need to set min). Since the maximum descending speed of the sheath thread 2' when forming a non-multilayer winding part is when i=1, from equation (14), S ₀ −ND=kr(sinθ+n/2sin2θ)ω (15) This equation The rotation angle θ of the crank 27 that satisfies
(rad), θ ₁ (θ ₁ <π/2) (rad), θ ₂ (θ ₂ >
π/2)(rad), the multilayer winding portion is formed where the rotation angle θ(rad) of the crank 27 satisfies θ ₁ <θ<θ ₂ . The non-multilayer winding portion is formed in a portion excluding the range of θ ₁ <θ<θ ₂ where the multilayer winding portion is formed from one rotation of the crank 27, that is, 0 to 2π. Therefore, the non-multilayer winding portion is formed at a rotation angle θ (rad) of the crank 27 in the range of 0θθ ₁ , θ ₂ θ2π. FIG. 3A shows a multilayer winding portion and a non-multilayer winding portion formed by one rotation of the crank 27, as well as the thread guide 22 when these winding portions are formed.
(Crank 2 in this figure)
Fig. 7 is an explanatory diagram showing the rotation angle θ (rad) of Fig. 7; The shaded area shows the speed of core yarn 2 and thread guide 2.
2, that is, the difference from the speed of entanglement point 6. In order to change the vertical position and speed of the thread guide 22, it is also possible to use a cam mechanism instead of the crank mechanism as described above. With the center of rotation of the cam 14 as the origin, and the length from this origin to the circumferential surface of the cam 14 as the radius, the cam 14
The shape of the circumferential surface of is shown in the following polar coordinates. r=f(θ) (16) Here, r is radius (m), θ is argument (rad) f
(θ) is a function approximated to a cosine curve with a period of 2π. The length l ₁ (m) between the pivot shaft 16 of the swing lever 15 and the friction roller 25 is the maximum and minimum value of the radius of the cam 14. If it is sufficiently longer than the difference between
The friction roller 25 of the swinging lever 15 that swings vertically due to the rotation of the cam 14 and the cam 14
The movement of the point of contact with is considered to be a linear movement in the vertical direction, and its speed υ (m/min) is expressed by the following equation. υ＝dr／dt＝f′(θ)dθ／dt＝f′(θ)ω(17
) Here, ω is the rotational angular velocity of the cam (rad/min). Therefore, due to the vertical movement of the swing lever 15,
Speed S of the thread guide 22 moving in the vertical direction
(m/min) is expressed by the following formula. S=kυ=kf′(θ)ω (18) Here, k is the magnification ratio by the swing lever (k≒l ₂ /
l ₁ ) l ₂ is the length (m) from the point of contact between the swing lever and the guide roller to the support shaft. Therefore, the descent of the thread guide 22 when the multilayer winding part is formed by the rotation of the cam 14. If the speed is S ₁ (m/min), the value of the deflection angle θ (rad) (hereinafter referred to as rotation angle θ (rad)) of the cam 14 when the multilayer winding portion is formed is expressed by equation (4). From equation (18), it is given by the following equation. S ₀ −ND/i=kf′(θ)ω (19) where 1<i<8 preferably 2<i<5 Rotation of the cam 14 at the position where the multilayer winding part and the non-multilayer winding part connect The value of the angle (rad) θ is (19)
Since it is equal to the value of θ (rad) when i=1 in the equation, it is given by the following equation. S ₀ −ND=kf′(θ)ω (20) The value of θ (rad) that satisfies equation (20) is θ ₁ (rad),
If θ ₂ (θ ₁ <θ ₂ ) (rad), the multilayer winding part is (19)
In the formula, the rotation angle θ (rad) of the cam 14 is θ ₁ <θ<
It is formed in the range of θ ₂ , and the non-multilayer winding part is formed in the range of 0θθ ₁
and θ ₂ θ2π. Therefore, the maximum value (S ₂ ) _nax (m/min) of the descending speed S ₂ (m/min) of the thread guide 22 when a non-multilayer winding part is formed is given by equations (7) and (20). (S ₂ ) _nax = kf' (θ ₁ ) ω = kf' (θ ₂ ) ω (21) Lowering speed of thread guide 22 S ₂ (m/min)
If the value of the rotation angle θ (rad) of the cam 14 when becomes 0 is 0, θ ₃ (θ ₂ <θ ₃ ) (rad), then from equation (18) kf'(0)ω=kf' (θ ₃ )ω=0 (22) Therefore, the rotation angle θ of the cam 14 at which the non-multilayer winding portion is formed by the descent of the thread guide 22
The range of (rad) is 0θθ ₁ , θ ₂ θ<θ ₃ . The deflection angle θ (rad) of the cam 14 where the non-multilayer winding portion is formed by the rise of the thread guide 22
The range of is θ ₃ <θ<2π. Therefore, the rotation angle θ (rad) of the cam 14
θ (rad) when the rising speed _{S 3 (} m/min) of the thread guide 22 is maximum in the range of θ 3 < θ < 2π
If the value of is θ ₄ (rad), then (S ₃ ) _nax = kf′(θ ₄ )ω (23) Therefore, the value of the rotation angle θ (rad) of the cam 14 is θ ₄
(rad), the winding density C ₃ (T/m) of the sheath thread 2' in the non-multilayer winding part is the minimum value (C ₃ ) _nio
(T/m), which is given by the following equation from equations (10') and (23). (See Figure 3B) (C ₃ ) _nio = N/S ₀ + kf' (θ ₄ ) ω (24) In the above explanation, in order to make the discussion easier, the angular velocity during one rotation of the crank 27 or the cam 14 is ω
(rad/min) is assumed to be approximately constant; however, in reality, the transmission 24, which is designed to change speed in an extremely complicated manner, is electrically connected to the induction motor 13.
The rotational speed of is changing even during one rotation. Therefore, the angular velocity ω(rad/
min) changes even during one revolution of the crank 27 or the cam 14. Therefore, the vertical speed of the thread guide 22, that is, the vertical speed of the entanglement point 6 of the sheath thread 2' with the core thread 2, changes every time the crank 27 or the cam 14 rotates, and sometimes even during one revolution. It changes from moment to moment. Moreover, the vertical displacement and speed of the entanglement point 6 are determined by the crank 2.
The deviation described above is determined by the rotational speed of the crank 27 or the cam 14 and the configuration conditions, but one rotation of the crank 27 or the cam 14, that is, one period of the deflection angle from 0 to 2π. However, the time required to rotate by 2π varies extremely complicatedly depending on the setting conditions of the transmission 26 attached to the induction motor 13. The length and thickness as well as their distribution can be extremely complex. Furthermore, a general case where the configuration conditions of the crank mechanism, cam mechanism, or rocking lever are not limited can be analyzed as follows. If the length m ₁ (m) between the support shaft 16 of the swing lever 15 and the connecting pin 29 and the length a (m) of the connecting rod are not sufficiently longer than the length r (m) of the crank 27, Although equation (11) holds approximately, it cannot be said that it holds exactly. Also, the support shaft 16 of the swing lever 15
Length l ₁ (m) between and friction roller 25
If is not sufficiently longer than the difference between the maximum diameter and the minimum diameter of the cam 14, equation (18) approximately holds;
It cannot be said that it has been established exactly. In addition, the swing lever 15
The position of the point of contact between the tip of the guide rollers 24 and 24' also moves little by little as the swing lever 15 swings, so the value of k in equations (12) and (18) can approximately be said to be a constant. However, to be precise, it is not a constant but a function of the rotation angle θ (rad) of the crank 27 or the cam 14. Therefore, cases in which equations (12) and (18) hold, and cases in which these relational expressions do not hold as described above, are generally considered as follows. The rotation of the induction motor 13 causes the crank 27 or the cam 14 to rotate, so that the swing lever 15 swings about the support shaft 16, and the slide bars 18, 18' move up and down. Therefore, the thread guide 22 of the guide rod 21 moves up and down. Therefore, the vertical displacement H (m) of the thread guide 22 is expressed as a function of the rotation angle θ (rad) of the crank 27 or the cam 14 as follows. H=F(θ) (25) Here, F(θ) is a function approximated to a cosine curve with a period of 2π Rotational angular velocity ω of the induction motor 13
(rad/min) changes in a very complicated manner depending on the setting conditions of the transmission 26, so ω(rad/min) becomes a function of time t(min). Therefore, the vertical speed S (m/min) of the thread guide 22 is also a function of time: S=dH/dt=F'(θ)dθ/dt=F'(θ)ω(2
6) is expressed as Lowering speed of thread guide 22 S ₁ (m/min)
When satisfies the condition of equation (4), a multilayer winding part is formed, so from equations (4) and (26), F′(θ)ω=S ₀ −ND/i (27) where 1<i<8 Preferably 2<i<5 Therefore S ₀ −ND<F′(θ)ω<S ₀ −ND/8 Preferably S ₀ −ND/2<F′(θ)ω<S ₀ −ND/5
(28) In the device of the present invention, other structural conditions other than the transmission 26 and the induction motor 13, i.e., the crank mechanism or cam mechanism, the swing lever 1
Once the configuration conditions such as the position of the support shaft 16 of 5 and the guide rollers 24, 24' of the horizontal rod 17 are set,
(θ) and F'(θ) are determined, the limit of the rotational angular velocity ω (rad/min) of the induction motor 13 for forming the multilayer winding portion is given as follows. S ₀ −ND/F′(θ)＜ω＜S ₀ −ND/8/F′(θ
) Preferably S ₀ −ND/2/F′(θ)<ω<S ₀ −ND/5/F′
(θ) (29) The transmission 26 is the induction motor 13
Although the speed is set to vary extremely complicatedly, a multilayer winding portion is formed by setting the value of ω (rad/min) within a range that satisfies the above equation. The connecting position of the multilayer winding part and the non-multilayer winding part is
Since the number of winding layers i of the sheath yarn 2' is 1, from equation (27), S ₀ −ND=F′(θ)ω F′(θ)=(S ₀ −ND)/ω (30) The values of θ (rad) that satisfy the formula are θ ₁ (rad), θ ₂ (θ
₁
<θ ₂ )(rad), the rotation angle θ of the crank 27 or cam 14 for forming the multilayer winding part is
The range of values of (rad) is θ ₁ <θ<θ ₂ (31) As shown in equation (29), the range of values of ω (rad/min) for forming a multilayer winding part is the range of values for induction motors. 13 changes speed in various ways, so the length and thickness of the multi-layer winding section change in various ways. In addition, the winding density of the sheath thread 2' in the multilayer winding part is C ₀
(T/m) is C ₀ =1/D according to equation (2). In the non-multilayer winding part of the sheath yarn 2' around the core yarn 2, the number i of winding layers of the sheath yarn 2' wound around the outer layer of the core yarn 2 is 1, and each position of the core yarn 2 is If the winding density of the sheath yarn 2' is C (T/m), then
From equations (1) and (26), F′(θ)ω=S ₀ −N/C (32) The number of winding layers i at the position where the multilayer winding part and the non-multilayer winding part connect is 1. , since the winding density C (T/m) of the sheath threads 2' at this position is 1/D because the sheath threads 2' are in close contact with each other, F'( θ)ω=S ₀ −ND (33) Crank 27 or cam 14 that satisfies this formula
The values of the rotation angle θ (rad) are θ ₁ (rad), θ ₂ (θ ₁ < θ ₂ )
(rad), the non-multilayer winding part is crank 2.
7 or the rotation angle θ (rad) of the cam 14 is 0θ
It is formed in the range of θ ₁ , θ ₂ θ2π. Maximum value (S ₂ ) _nax of the descending speed S 2 (m/min) of _the thread guide 22 when forming a non-multilayer winding part
(m/min) is (S ₂ ) _nax = F' (θ ₁ ) ω = F' (θ ₂ ) ω (34) from equations (7) and (33), and the sheath thread 2 at this position ′ winding density C
(T/m) is 1/D. Rotation angle θ (rad) of the crank 27 or cam 14 at the position where the descending speed S ₀ (m/min) of the thread guide 22 becomes 0 when forming a non-multilayer winding part
The value of is 0, θ ₃ (θ ₂ <θ ₃ ) (rad), and the value of the winding density C (T/m) of the sheath yarn 2' at these positions is (C ₂ )S ₂
= 0 (T/m), then from equation (32) F'(0)ω=F'(θ ₃ )ω=S ₀ −N/C ₂ (35) Therefore, (C ₂ )S ₂ = 0 =N/S ₀ Therefore, by descending the thread guide 22, the crank 2 for forming a non-multilayer winding part.
7 or the range of the rotation angle θ (rad) of the cam 14 is 0θθ ₁ , θ ₂ θθ ₃ The range of the winding density C (T/m) of the sheath thread 2' at this time is N/S ₀ C1/D . Further, the range of the rotation angle θ (rad) of the crank 27 or cam 14 for forming a non-multilayer winding portion by raising the thread guide 22 is θ ₃ θ2π The rising speed of the thread guide 22 S ₃ (m/min )
If the maximum value of is (S ₃ ) _nax (m/min) and the value of the rotation angle θ (rad) of the crank 27 or cam 14 at this time is θ ₄ (rad), then the sheath thread 2' at this position is The winding density C ₃ (T/m) is the minimum value (C ₃ ) _nio (T/m).
m), and from equations (26) and (32), (S ₃ ) _nax = F' (θ ₄ ) ω (C ₃ ) _nio = N/S ₀ + (S ₃ ) _nax = N/S ₀ + F' ( _θ4 )
ω (36) Therefore, the range of the winding density C ₃ (T/m) of the sheath thread 2' in the non-multilayer winding portion formed by the raising of the thread guide 22 is given by the following equation.
(Refer to Figure 3B) N/S ₀ <C ₃ N/S ₀ +F'(θ ₄ )ω (37) When the number i of winding layers of the sheath yarn with respect to the core yarn increases in the multilayer winding part, the multilayer winding The overfeed rate of the sheath yarn in the turn section is several to several tens of times the feed rate of the core yarn. Therefore, it is necessary to overfeed the sheath thread to make it slack while forming the non-multilayer winding part, and to keep it long enough to form the next multilayer winding part. In other words, the required length of the sheath thread is determined by the length of the multilayer winding part, the number of winding layers, and its distribution. It is necessary to make it a suitable length and leave it slack. Therefore, the length of the multilayer winding section, the number of winding layers, and their distribution are limited by the overfeed rate of the sheath yarn. If the overfeed rate of the sheath yarn is increased too much, the slack of the sheath yarn will increase too much until the multi-layer winding part is formed, making it difficult to keep the sheath yarn from getting tangled. The limit of the yield rate is also determined by the structure of the false twisting and crimp processing machine. Furthermore, if the number of layers i of the sheath yarn wound in the multi-layer winding section becomes too large, the thickness of the multi-layer winding section becomes too large and both ends of the multi-layer winding section tend to collapse. In the present invention, in consideration of the above phenomenon, the number i of winding layers of the sheath yarn with respect to the core yarn is limited to 1<i<8, preferably 2<i<5, and the overfeed rate of the sheath yarn is set to 10 to 1. It was limited to 300%, preferably 50 to 150%. As mentioned above, in the theoretical consideration of the manufacturing apparatus of the present invention, calculations were made assuming that the cross section of the yarn is circular; however, in reality, it is not necessarily circular, but has various shapes, and its apparent size also varies. It varies somewhat depending on the tension of the yarn. However, in order to facilitate the discussion, we assumed that the cross section of the yarn was circular, and conducted the theoretical analysis as described above to set the manufacturing conditions for the special false twist crimp yarn manufacturing apparatus. Therefore, it is inevitable that there will be some difference between the structure of the special false-twisted crimped yarn produced and the set manufacturing conditions described above. FIG. 4 is a model diagram of the special false twisted and crimped yarn produced by the production apparatus of the present invention, in which the black thread represents the core thread 2 and the white thread represents the sheath thread 2'. Two manufacturing examples in which special false-twisted crimped yarns were manufactured using the manufacturing apparatus of the present invention will be described below. Example 1 Raw yarn Core yarn: Polyester filament yarn semi-dull
75d/36f Sheath thread: Same as above High shrinkage thread (shrinkage rate 69.5%) 50d/
36f Model: Friction false twisting machine SD-3 False twisting conditions Yarn speed (core yarn): 60 m/min (Yarn running speed) / (Disc speed) = 0.19 Thread guide speed of sheath yarn: +59 m/min ~ -60
m/min Heater temperature 1st heater: 200℃ 2nd heater: 190℃ False twist feed rate Core yarn: +3.0% Multilayer winding part of sheath yarn: 60-130% (variable speed) Non-multilayer winding of sheath yarn Turning part: 8.7-10% Quality of production processed yarn Average thickness: 210d Strength: 1.7g/d Elongation: 28.8% Note: + in the thread guide speed of the sheath thread indicates the running direction of the core thread, and - indicates the running direction of the core thread. Indicates the opposite direction to the running direction of the thread. Note that f is the number of filaments of the filament yarn. Example 2 Raw yarn Core yarn: Polyester filament high shrinkage yarn (shrinkage rate 65%) 50d/36f Sheath yarn: Polyester kakeole filament normal shrinkage yarn 50d/24f Model: Spindle type false twist crimping machine ST-6 False twisting Conditions Yarn speed (core yarn): 45m/min Thread guide speed of sheath yarn: +44.3m/min~-
45m/min Number of false twists: 1850T/m Heater temperature 1st heater: 193℃ 2nd heater: 205℃ False twist feed rate Core yarn: +3.0% Multilayer winding part of sheath yarn: +50~160% (Tension 0.8~0.2
g/strand) Non-multilayer winding part of sheath yarn: +8.7~10% Quality average thickness of produced processed yarn: 180d Strength: 1.9g/d Elongation: 26% In the present invention, the upper and lower ends of one guide rod The vertical movement of the entanglement point of the sheath threads with respect to the core threads running through the heater is determined by the vertical movement of each of 10 to 20 sheath threads.
Since the process is carried out in the same way as a set, it is possible to produce special false twisted crimped yarns having the same thickness and length of the multi-layer winding portion as well as their distribution. The ratio of the lengths of the multilayer winding section and the non-multilayer winding section is determined by the ratio of the rotation angle ranges of the crank or cam forming these winding sections, and the rotational angular velocity of the induction motor in each rotation angle range. Depends on. Moreover, the sheath yarn is overfeed from the side close to the core yarn running in the heater, and the sheath yarn is wound around the outer periphery of the core yarn to form a multilayer winding part.
A strong multi-layer winding part can be obtained. Note that when the formed multi-layer wound part passes through a false twisting device and is subjected to untwisting and shape heat fixation in the second heater, the multi-layer wound part is hardly untwisted and the non-multilayer wound part is mainly twisted. Untwisted. Therefore, the multilayer winding portion of the special false-twisted crimped yarn produced by the apparatus of the present invention may loosen or flow during the preparation process such as weaving or knitting, or may generate whisker-like loops. Not at all. Therefore, in woven or knitted fabrics using the special false twisted and crimped yarn produced by the apparatus of the present invention, the distribution of the slab-like multilayer winding portions appearing on the surface of the fabric is The distribution is as designed, and the distribution state in all parts is uniform, and depending on the part of the fabric surface, the multilayer winding part is distributed extremely densely or extremely coarsely, which may cause defective fabrics. There is a remarkable effect that there is no fear that this will occur. Furthermore, as mentioned above, the multilayer winding portion of the special false twisted crimped yarn produced by the apparatus of the present invention does not loosen, flow, or generate whisker-like loops in the subsequent process, so it can be used for knitting and weaving. Glue, twist,
Not only is there no need to improve the convergence of the filament yarn in the multilayer winding section by winding another yarn, but also when using the special false twisted crimped yarn produced by the apparatus of the present invention, This method has the remarkable effect of producing a knitted fabric that is extremely spun-like, and to be exact, a knitted fabric that is very elegant, with a chintang-like appearance.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram of the manufacturing apparatus of the present invention, FIG. 2 is an explanatory diagram of a part of another embodiment, FIG. 3 is an explanatory diagram of a part of the operating state of the apparatus, and FIG. FIG. 3 is a model diagram of a special false-twisted crimped yarn produced by the apparatus. 2... Core yarn, 2'... Sheath yarn, 5... First heater, 6... Entanglement point, 8... False twisting device, 10... Second heater, 13... Induction motor,
14...cam, 15...swing lever, 17...horizontal rod, 18,18'...slide bar, 19,1
9'...Support member, 21...Guide rod, 22
...Thread guide, 13...Gap between first heater, 24, 24'...Guide roller, 25...
Friction roller, 26...Transmission device, 27
...Crank, 28...Connecting rod, 29...Connecting pin.

Claims (1)

[Claims] 1. In a false twisting machine, one guide rod is provided horizontally close to each of 10 to 20 heaters,
Each thread guide attached to this guide rod is placed close to the gap provided in the vertical direction of each heater. a swinging lever having two guide rollers mounted closely together, a guide bar fixed to the lower end of the slide bar, the guide bar fixed to both ends of the guide rod, and one end pivoted to the frame. The other end is inserted between the guide rollers, the induction motor is connected to a transmission, and the swing lever is swung by a crank or cam attached to the shaft of the induction motor. 10 to 20 thread guides are simultaneously moved up and down while changing speed, and the descending speed of these thread guides is S ₁
(m/min) is somewhat smaller than the descending speed S ₀ (m/min) of the core yarn, and the core yarn is lowered for a very short period of time according to the following conditions, and the sheath yarn is attached to the core yarn running at a constant speed by each heater. S ₁ =S ₀ -ND/i 1<i<8 preferably 2<i<5 where N is the twisting speed of the false twisting and crimping machine ( T/
min) D is the diameter of the sheath yarn (μ) i is the number of winding layers of the sheath yarn T is the number of windings of the sheath yarn with respect to the core yarn The descent of the thread guide when forming a non-multilayer winding part of the sheath yarn with respect to the core yarn The speed S ₂ (m/min) and the rising speed S ₃ (m/min) are S ₂ =S ₀ -N/C ₂ , -S ₃ =S ₀ -N/C ₃ N/S ₀ C ₂ 1/D , N/S ₀ + (S ₃ ) _nax C ₃ <N
/S ₀ where C ₂ is the winding density of the sheath thread when the thread guide is lowered (T/m) C ₃ is the winding density of the sheath thread when the thread guide is raised (T/m) (S ₃ ) _nax is the thread density A special false-twisted crimped yarn production device characterized in that the guide can be raised at a maximum speed (m/min) and that the induction motor can be changed in speed in an extremely complicated manner according to the design of the transmission device described above.