JPS60155736A - Device for adjusting yarn tension of spinning machinery - Google Patents

Abstract

PURPOSE:To prevent end breakage by tension and to make hardness of wound cone cheese uniform, by controlling a spring in such a way that spring force is enlarged when yarn is traversed from the large diameter side to the small diameter side of cone cheese, and the spring force is lessened when the yarn is traversed in the opposite direction. CONSTITUTION:The spring member 13, pushing the tension adjusting lever in the direction to increase route length of yarn to be brought into contact with the guide part 12a of the tension adjusting lever 12, is set. The device 20 for controlling amount of strain, moving synchronously with traverse motion of system, changing amount of strain in such a way that spring force of the spring member is lessened when yarn is transferred in the direction from the small diameter side to the large diameter side of cone cheese, is connected to the spring member.

Description

TECHNICAL FIELD The present invention relates to a yarn tension adjustment device capable of compensating for yarn tension fluctuations in a spinning machine.

Conventional technology For example, in an open-end spinning machine, as shown in Fig. 1, the yarn spun by the spinning device 1 passes through a guide rod and is pulled out by a pair of pull-out rollers 3 degrees, and is kept constant in the longitudinal direction of the machine frame. Typically, the corn cheese base is formed while traversing in the longitudinal direction of the machine due to the action of a known traversing groove (not shown) provided on the traverse rod 9 or the winding drum 3, which reciprocates with an amplitude of . be. Furthermore, a yarn detection device (not shown) is installed along the travel path of the yarn wheel to detect yarn breakage during spinning. In this way, threads are formed on the corn cheese base while traversing, so
Tension fluctuations occur due to a difference in circumferential speed between the small diameter end and the large diameter end of the cheese, and tension fluctuations due to a difference in path length through which the string passes.

Therefore, in order to absorb such tension fluctuations, the thread tension adjustment device is adjusted to the pull-out roller 3. It is generally provided between the traverse rod t and the traverse rod t.

As such a thread tension adjustment device, for example,
As disclosed in Publication No. 3/90, a movable tension adjustment lever having a guide portion for a thread that is fed out at a constant speed and wound while traversing to form corn cheese, and the tension adjustment lever is disclosed. A spring-type adjustment device is known that has a spring member that engages with the lever and biases the adjustment lever in a direction that increases the path length of the thread that contacts the guide portion.

However, in conventional spring-type thread tension adjusting devices, the spring of the spring member is used to compensate for fluctuations in thread tension that increase as the thread winds from the small diameter end to the large diameter end and increases in winding speed. The thread tension adjustment lever is moved in a direction that shortens the thread path length against the force, and the tension fluctuation is compensated for by shortening the thread path length. As is well known, the spring force of the spring member is generated in proportion to the amount of strain, so when the thread is wound around the large diameter end of the corn cheese and the tension is large, the adjustment lever will exhibit the maximum displacement, and therefore The amount of strain in the spring member becomes maximum, and an even larger spring force acts on the thread. As a result, not only does tension breakage occur in the yarn, reducing operational efficiency, but also the hardness of the corn cheese rolls in the axial direction is not as uniform as expected, resulting in the cross-sectional shape of the yarn in each yarn layer. This causes uneven dyeing due to uneven absorption of the dye solution during the dyeing process.

In addition, the shape of the rolled ball deteriorates, resulting in chrysanthemum-shaped wrinkles on the end surface of the corn cheese near the bobbin, and bulges where a part of the end surface of the corn cheese swells in the axial direction, such as unwinding. Various troubles occur in post-processes, such as reduced work efficiency.

OBJECTS OF THE INVENTION Accordingly, an object of the present invention is to create a structure in which the spring force is large when the thread traverses from the large diameter end to the small diameter end of the corn cheese, and vice versa, so that the spring force is small when the thread traverses from the large diameter end to the small diameter end. It is an object of the present invention to provide a thread tension adjustment device for a spinning machine that eliminates the above-mentioned drawbacks of the conventional art.

Structure of the Invention In order to achieve the above object, the thread tension adjusting device according to the present invention moves in synchronization with the traverse movement of the thread, and when the thread moves from the small diameter end to the large diameter end of the corn cheese, the tension adjustment device of the spring member is moved. The present invention is characterized in that a strain amount control device that changes the amount of strain of the spring member is connected to the spring member so that the spring force is reduced.

Embodiment 1 FIGS. 2 and 3 show an embodiment. In the figures, the same reference numerals used in FIG. 7 indicate the same or corresponding parts. The thread tension adjusting device according to the present invention/θ is the pull-out roller 3. The thread is passed through the guide portion 9a of the traverse rod through the thread tension adjustment device 10 and the guide rod 1/, and the silicone cheese is inserted through the traverse. Formed in B.

The thread tension adjustment device 10 controls a movable tension adjustment lever lλ having a thread guide/core a, a coil spring 13 surrounding the right half of the adjustment lever 12, and the amount of distortion of this coil spring 13. and a distortion amount control device 20 for controlling the distortion amount.

The tension adjustment lever saw passes through a bracket 2.2 that is appropriately attached to an interlocking member 2.2 that constitutes a part of the strain amount control device 20 whose details are shown in FIG. The position can be adjusted.
The coil spring 13 is wound in a compressed state between the bracket λ and the seven nuts. Therefore, the coil spring /3 moves in the direction of the arrow lj in the diagram, that is, in the direction of the guide part /3.
The adjustment lever/yu is biased in the direction of increasing the path length of the thread that contacts Ua.

An abbreviated guide body is fixed to a machine base (not shown) by bolts 76 or the like.

The guide body is connected to the interlocking member 21 and the adjustment lever/J.
It is equipped with an O/arm 7g that guides the movement of the O arm/? is provided with a slot /9C that serves as a passage for a guide part /2a that similarly moves as the adjustment lever 12 moves in the direction of arrow 15. The length of this slot/9C in the vertical direction is determined so that the guide part/Ua does not rotate around the axis of the adjustment lever/Z.
It is only slightly thicker in diameter.

The strain amount control device - ○ moves in synchronization with the traversal movement of the thread λ, so that the spring force of the spring member 3 becomes smaller when the thread moves from the small diameter end to the large diameter end of the corn cheese 6. , the amount of strain of spring member /3 is changed.

That is, the traverse rod 9 has three retainers that fit into the grooves 3/ of the grooved drum 30 driven by a drive source (not shown), and the grooved drum 30 is rotated in the direction of the arrow 33. At times (when the yarn advances toward the large diameter end), it traverses in the direction of arrow 3da, and the strain amount control device -0 in the present invention is driven by the drive shaft 3S of the grooved drum 30. The distortion amount control device 20 includes a timing pulley 33 coupled to a drive shaft 3S, a timing pulley 3g synchronously driven by the pulley 33 via a timing belt 37, and a rotating shaft 39 coupled to the pulley 3g.
The interlocking member J/ has a retainer +2 at one end that fits into a groove lIl provided on the circumferential surface of the drum tio. During traverse (when the thread advances toward the large diameter end), it is interlocked in the direction opposite to arrow 341 (arrow 3).

Next, the operation of the embodiment having the above-mentioned configuration will be explained.

In the Oko diagram and FIG. 3, during normal spinning, the thread is moved to the drawing roller 3. The guide parts /9b, /2 are pulled out by
tL and/? a in this order, and is traversed by the traverse rod 9 in the direction of the arrow 31I and in the opposite direction, and is formed into corn cheese B. When the thread traverses from the small diameter end of the corn cheese O to the large diameter end, the speed at which it is wound around the corn cheese O gradually increases, so the thread tension also increases, and the thread tries to take the shortest path. Therefore, the guide 7.2a advances in the direction of the arrow in FIG. 3 towards the auxiliary guides /9a, 19b.

At this stage, if the interlocking member 21 is fixed without traversing, the guide part /, 2a is the auxiliary guide part /? When moving to the a, /qb side, the amount of strain in the coil spring /3 gradually increases between the bracket 22 and the nut /4Z, and as a result,
A very large force will act on the thread.

However, according to another embodiment of the present invention, when the thread is traversed by the traverse rod t, the traverse rod t? The bracket 2.2 provided on the interlocking member 21 is also moved by a predetermined amount by the distortion amount control device θ which is interlocked with the movement control device θ. That is, when the thread moves from the small diameter end to the large diameter end,
Since the bracket 22 moves toward the auxiliary guide portions 1qe, . Therefore, even when the thread moves as described above, excessive tension is not applied to the thread, and the tension can be adjusted optimally.

Embodiment In the first embodiment, the tension adjustment lever saw was movable in the traverse direction of the thread, but in the second embodiment, it is rotatable in a vertical plane perpendicular to the traverse direction of the thread.

In the OFF diagram and FIG.
The tension adjusting lever ro has a cylindrical base sob, A coil spring 13I is provided along the circumferential surface of the coil spring 13I. One end thereof engages with the flange SOC of the base sob, and the other end engages with two interlocking members, which will be described later, so as to bias it in the direction (direction).

In order to control the amount of strain of this coil spring 71, a strain number controller ko1 is connected to the coil spring 3I. That is, the strain amount control device 20' includes a gear 5S driven by the drive shaft 3S1, a gear 56 that meshes with the gear 11, and an eccentric cam j-f provided on the shaft S7 that supports the gear tj. And the follower! A swing block 60 having r9, a swing shaft 61 that supports the swing block 60 and another swing block 6, a connecting arm O3 connected to the swing block 62, and a connecting arm 63 connected to the swing block 60. The rotational movement of the drive shaft 3SI is controlled by the eccentric cam 5.
f etc., it is converted into a swinging motion of the interlocking member ko/1. When the thread is wound from the small diameter end to the large diameter end of the corn cheese 6', the interlocking member Koto moves in the direction in which the spring force of the coil spring becomes smaller, that is, in the Oda diagram, the guide part of the traverse rod 91. When 9a' moves in the direction of arrow 3'l', the swing shaft 61 swings in the direction of arrow '13'R, and the connecting arm 63 moves in the direction of arrow 31, thereby causing the interlocking member to move in the direction of arrow '13'R'. /1 swings in a direction opposite to the winding direction of the coil of coil spring /3'.

Next, the operation of the Oko embodiment having the above-described configuration will be explained.

In the Oda diagram and FIG. 3, during normal spinning, yarn-1 is pulled out by pull-out rollers 3' and
After passing through OJA'l in this order, it is formed into corn cheese 61 while being traversed by nine traverse rods. When the thread 21 traverses from the small diameter end of the corn cheese 61 to the large diameter end, the speed at which the thread 21 is wound around the corn cheese 6I gradually increases, so the thread tension also increases, and the thread 2
1 tries to take the shortest route, so the guide section Soa
A force that tries to rotate it in the direction opposite to arrow 3 in the Oda diagram is applied.

At this stage, if the interlocking member 2/I is fixed and does not swing in synchronization with the traverse of the thread, when the guide section 30a rotates in the above direction, the amount of distortion (torsion amount) of the coil spring/Jl ) gradually increases between the flange 30c and the interlocking member 30c, resulting in a very large force acting on the thread.

However, according to the embodiment of the present invention, when the thread coil tube is traversed by the traverse rod q1, the strain amount control device KO' that is interlocked with the core traverse rod 9I causes the interlocking force connected to the coil spring /3I to The member-door swings a predetermined amount. That is.

When the thread 1 advances from the small diameter end to the large diameter end, the interlocking member 2
Since /1 swings in the opposite direction to the coil winding direction, the amount of distortion of the coil spring /3' is a controlled amount determined by the swing amount of the two interlocking members at that time. Therefore, even when the thread coil 1 moves as described above, excessive tension is not applied to the thread coil 1, and optimum tension adjustment can be performed.

Note that the coil spring is not limited to a compression spring, but may be a tension spring, and the thread traverse mechanism may be of a rotary traverse type using a drum instead of an quick traverse type such as a traverse rod.

Effects of the Invention As described above, according to the present invention, the spring member that biases the tension adjustment lever in the direction of increasing the path length of the thread that contacts the guide portion of the tension adjustment lever has a spring member that is adapted to the traverse movement of the thread. Move in sync and the threads are small corn cheese! A strain control device that changes the amount of strain on the spring member is connected so that the spring force of the spring member decreases when going from the end side to the large diameter end, so that the thread is wound toward the large diameter end. Excessive tension does not act even when the ball is being rolled, which improves operational efficiency by preventing tension breakage.It also improves the hardness of the rolled ball and prevents uneven dyeing. This can be prevented from occurring.

[Brief explanation of drawings]

Fig. 1 is a schematic front view showing an example of a vine open-end spinning machine to which the present invention is applied, Fig. 2 is a perspective view of a spinning machine equipped with an axle embodiment of the yarn tension adjusting device according to the present invention, and Fig. 3 shows an oval spinning machine. l
A schematic diagram showing the synchronization relationship between the distortion amount control device and the traverse of the yarn in the embodiment, an Oda diagram, and FIG. 3 are schematic diagrams corresponding to the Oda diagram and FIG. 3, respectively, regarding the Oko embodiment. In the figure, λ and -1 are threads, A and 61 are corn cheese, 1
0 is the thread tension adjustment device, lco and SO are the tension adjustment levers,
/2a and! O1L is a guide part, 13 and /J' are spring members (coil springs), and 2o and s O+ are strain amount control devices. Figure 4

Claims (1)

[Claims] A movable tension adjustment lever having a guide for a thread that is fed out at a constant speed and wound up while traversing to form corn cheese, and a thread path that engages the adjustment lever and comes into contact with the guide. In the thread tension adjustment device for a spinning machine, the spring member has a spring member that urges the adjustment lever in a direction to increase the length, and the spring member has a spring member that moves in synchronization with the traverse movement of the thread so that the thread reaches the small diameter end of the corn cheese. Yarn tension adjustment of a spinning machine, characterized in that a strain amount control device is connected to change the amount of strain of the spring member so that the spring force of the spring member becomes smaller when going from the side to the large diameter end side. Device.