JPH0450345A - Yarn feeder - Google Patents

Abstract

PURPOSE:To deliver yarn in an unslacked state by providing a slackness absorbing part for making tension act so as to pulling back a tensioning part to the side of a storing part with a tension member between the cylindrical storing part of a small diameter and a tensioning part for applying tension to yarn. CONSTITUTION:A prescribed tension is applied to yarn taken out of a storing part 1 for storing the yarn 4 in an unrestricted state by friction with a tensioning part 2. Under the tension below that applied in the tensioning part, the slack of the yarn is absorbed by power of a tension member 6 in a slack absorbing part 3.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention provides a yarn supplying device with a tension applying mechanism capable of supplying weaving materials such as yarn while stably maintaining a set tension in a textile machine. It is related to.

[Prior Art] A tension applying device used in a textile machine usually draws out a thread wound around a bobbin under a constant tension. However, when weaving a large number of threads at a high density, it is necessary to install a large number of bobbins in parallel, and it is very difficult to arrange them in a limited space. Furthermore, if the size of the bobbin is reduced by reducing the diameter of the bobbin, the bending and friction of the thread will become even greater, resulting in greater damage to the thread.

One way to deal with this problem is to apply tension by tying threads around tension rubber or springs.
When the elongation of the rubber or spring changes, the tension also changes.
There is a problem in that changes in tension affect the tissue.

[Problems to be Solved by the Invention] The technical problem of the present invention is to store the yarn in an unrestricted state so that it can be sent out at a constant tension, and even when the tension decreases and the yarn becomes slack, The object of the present invention is to provide a mechanism capable of pulling it back, which is small in size and particularly has a small diameter.

[Means for Solving the Problems] The yarn feeding device of the present invention for solving the above problems basically consists of a small-diameter cylindrical storage that stores yarn, which is a weaving material, in an unrestricted state. a tension applying section that is movable in the direction of pulling the yarn from the storage section and applies a required tension to the yarn being pulled out by friction; and a tension applying section between the storage section and the tension applying section. The apparatus is characterized by comprising a slack absorbing part which is stretched in tension and applies tension to the tension applying part so as to pull the tension applying part back toward the storage part by means of a tension member.

The tension applying unit in the yarn supplying device is configured to apply pressure contact force by a spring between a pair of surface contact parts that sandwich and grip the yarn to apply a required tension due to friction to the yarn to be pulled out. In addition, the frictional force of the yarn can be adjusted, and the tension applied to the yarn to be pulled out can be adjusted.

Further, instead of the storage section in the yarn supply device, a bobbin or the like placed at an appropriate position can be used. In this case, the yarn supply device has a guide base for guiding the yarn, which is the weaving material. , a tension applying section that is movable in the direction of pulling out the yarn from the guide base and applies a constant tension to the yarn to be pulled out by friction, and a tension applying section that is tensioned between the guide base and the tension applying section, and a slack absorbing section that applies tension to the tension applying section by means of a member so as to pull the tension applying section back toward the guide base.

[Function] When the yarn sandwiched between the surface contact parts is pulled out in the tension applying part, a certain tension is applied by friction, and a constant tension is stably applied to supply a relatively long woven material. becomes possible. In addition, when the tension is lower than the tension applied in the tension applying section, the slack of the yarn can be absorbed by the force of the tension member in the slack absorbing section, and the holding force of the surface contact part in the tension applying section and the tension member of the slack absorbing section are Once the forces are equalized, the yarn is fed out with a constant tension.

Moreover, the above-mentioned application of tension can be achieved with a structure that requires only a small amount of space due to the linear arrangement.

[Example] Embodiments of the present invention will be described in detail below with reference to the drawings.

1 and 2 show an embodiment of the yarn feeding device of the present invention.

This yarn supply device includes a storage section 1 for storing yarn 4, which is a weaving material, in an unrestricted state, and a tension application that applies a constant tension to the yarn 4 pulled out from the storage section 1 by friction. part 2, and a slack absorbing part 3 consisting of a tension member 6 such as a spring stretched between the storage part 1 and the tension applying part 2, and these parts are arranged in a straight line or in a state close to a straight line. .

The storage section 1 is constituted by a small diameter cylindrical hollow container 7 in which the yarn 4 is stored in a natural piled state without being wound around a bobbin or the like, and the yarn 4 is stored using an air nozzle or the like which will be described later. Therefore, the bottom part 8 is formed into a net shape, and the end plate 9 on the yarn outlet side is provided with a guide hole 10 through which the yarn 4 is passed. Further, the tension applying section 2 applies a pressure contact force by a spring between the pair of surface contact parts 14, 14 that sandwich and grip the yarn 4, and applies tension to the yarn due to friction. Specifically, both ends of a leaf spring 12 having a thread 4 insertion hole 13 in the center are bent, brought into contact with each other with an appropriate force at the surface contact portion 14, and the thread 4 is sandwiched and held between them. This makes it possible to apply a constant tension due to friction to the thread 4 being pulled out. A slack absorbing section 3 provided between the storage section 1 and the tension applying section 2 connects both ends of a tension member 6 made of a coil spring with a thread 4 inserted through the center thereof to an end plate 9 of the storage section 1, respectively. and is tied around the insertion hole 13 in the tension applying section 2, thereby applying tension so as to pull the tension applying section 2 back toward the storage section 1 side.

As the tension member of the slack absorbing portion 3, a tension member 16 made of a plurality of rubbers or springs may be used as in the second embodiment shown in FIG.

In the yarn feeding device having the above configuration, when the yarn 4 sandwiched between the surface contact portions 14 of the leaf spring 12 is pulled out in the tension applying section 2, a constant tension is applied due to friction, and the tension member 6 By moving the tension applying section 2 in the yarn drawing direction, slack in the yarn 4 is absorbed. As a result, it becomes possible to supply a relatively long woven material while stably applying a constant tension, and it is possible to achieve this with a structure that requires only a small amount of linear arrangement space.

Fig. 2 shows the relationship between the displacement of the tension applying section 2 and the tension that can be applied to the yarn. The slack of the yarn can be absorbed by the force of the member 5, and from the point when the holding force of the surface contact part 14 in the tension applying part 2 and the force of the tension member 6 of the slack absorbing part 3 become equal, the yarn is stretched with a constant tension. Sent out.

The tension applied in the tension applying section 2 can be adjusted by means as described below.

FIG. 4 shows a tension applying section 2 in which tension is applied by sandwiching the yarn between the surface contact sections 24 of the leaf spring 22, and a tension adjustment screw 25 is used to tighten the space between the surface contact sections 24 and 24. The tension of the thread can be adjusted by adjusting the screw 25.

In addition to this structure, it is possible to adopt various structures in which the pressure force between the surface contact portions 24 and 24 of the leaf spring 22 can be adjusted by some means.

Further, the tension applying section 2 shown in FIG. 5 applies tension to the thread 4 by engaging the thread with a guide rod 27 that bends left and right alternately, and by using the contact resistance. By changing the number of times the guide rod 27 is applied, the tension can be adjusted.

In the embodiments shown in FIGS. 4 and 5, adjustment of the tension of the yarn is realized by the structure of the tension applying section 2 itself, but this is simpler than the tension applying section 2 having the structure shown in FIG. It is also possible to appropriately set the tension by using a stopper or guide.

FIG. 6 shows an example of this, and as can be seen from FIGS. 6 and 7, the container 37 constituting the storage section 1 of the yarn 4 is extended, and the tension applying section 2 and the tension member 36 are Guide tube 3
8, and a tension applying part 2 is installed near the mouth of this guide cylinder 38.
A stopper 39 with which both shoulders of the leaf spring 42 that form the contact abuts.
．． 39 is provided, and the leaf spring 42 also serves as a stopper 39.
When the guide piece 40 comes into contact with and stops, it comes into contact with both sides of the leaf spring 42 and presses the surface contact portions 44 and 44 against each other.
There are 40. This guide piece 40.40 is attached to the screw 4
1, the protruding position can be adjusted.

In the yarn feeding device having such a configuration, when the leaf spring 42 of the tension applying section 2 comes into contact with the stopper 39 during pulling out of the yarn, the guide piece 40 moves the surface contact section 4
4.44 is pressed, so as you can see from Figure 7,
High tension is applied to the yarn. In addition, with the simple structure of providing the stopper 39 and the guide piece 40, high tension can be applied, and the tension can be applied to the screw 41.
The adjustment setting can be made by adjusting the protruding position of the guide piece 40.

Such a yarn supply device can be effectively used in the following weaving. That is, in a loom (such as a braider) that creates a path difference in the yarn during weaving, the yarn is usually pulled out when the yarn carrier moves in a direction approaching the outer shape of the woven fabric. Moreover, at that time, a relatively large force is required to tighten the fabric. For this purpose,
It is clear that the above-mentioned yarn supplying device is effective because it can apply a higher tension when pulling out the yarn than when absorbing slack in the yarn.

FIG. 8 shows the structure of the tension applying section 2 in which the tension can be reliably released when the yarn is pulled out using a guide.

As can be seen from FIGS. 8 and 9, the yarn supplying device equipped with this tension applying section 2 is installed near the mouth of a guide tube 48 that is an extension of a container 47 constituting the storage section 1 for the yarn 4. , a surface contact portion 54.5 in the leaf spring 52 forming the tension applying portion 2
A wedge-shaped guide piece 50 is provided facing the widened end portion of No. 4.

In the yarn supply device having this wedge-shaped guide piece 50, when pulling out the yarn, the leaf spring 5 of the tension applying section 2
When the widened end portion of the surface contact portion 54.54 in FIG. The tension decreases as if it is being washed away. Therefore, the yarn is reliably released when the tension exceeds a certain level.

Such a yarn feeding device is effective when used when weaving relatively low-density woven fabrics because it cannot apply more than a certain tension to the woven fabrics.

The storage of the yarn in the storage section 1 in each of the above embodiments is as follows:
This can be easily carried out by using a yarn jetting air nozzle 56 as shown in FIG.

The air nozzle 56 shown in the figure has a cut 58 for thread insertion.
An air flow directed toward the nozzle tip side through the grip portion 59 is introduced into the yarn passage 57 having the above-mentioned shape, and the yarn 4 is introduced and deposited into the storage portion 1 by the air flow. In particular, the yarn thus stored is advantageous in that it can be easily pulled out from one end.

The yarn supply device described above omits the yarn storage section (■),
It can also be applied to setting the tension of yarn that is directly exposed from a bobbin or creel.

FIG. 11 shows an embodiment in which the yarn storage section is omitted, and includes a guide base 61 provided around a guide hole 62 that guides the yarn 4 from the bobbin 60, etc., and a guide base 61 that is pulled out from the guide base 61. The tension applying section 2 is guided by a tension applying section 2 similar to that of the above embodiment that applies a constant tension to the yarn 4 to be applied by friction, and a tension member 66 stretched between the guide base 61 and the tension applying section 2. It is provided with a slack absorbing part 3 that applies tension to the base side so as to bend the bow back.

According to such a yarn supply device, the guide base 61, the slack absorbing section 3, and the tension applying section 2 arranged in a linear manner can absorb slack and apply tension in a small space.

[Effects of the Invention] According to the yarn feeding device of the present invention detailed above, the yarn can be stored in an unrestricted state and fed out with a constant tension, and the yarn can be fed out with a constant tension, and the yarn can be loosened due to a decrease in tension. Even in this case, the mechanism that made it possible to pull it back can be provided as being compact, especially of small diameter.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing a first embodiment of the yarn feeding device of the present invention, and FIG. 2 shows the relationship between the displacement of the tension applying section and the tension that can be applied to the yarn in the operating state of the first embodiment. FIG. 3 is a perspective view of the second embodiment of the present invention, and FIGS. 4 and 5 are perspective views showing different embodiments of the tension applying section that can adjust the tension of the yarn. Figure 6 is a perspective view showing the structure of the tension applying part and its surroundings in an embodiment in which the tension of the thread can be adjusted, and Figure 7 shows the displacement of the tension applying part in relation to the operating state of the same embodiment. Fig. 8 is a perspective view showing the structure of the tension applying section and its surroundings in an embodiment in which the tension of the thread can be released when the thread is pulled out, and Fig. 9 is an explanatory diagram showing the relationship between is an explanatory diagram showing the relationship between the displacement of the tension applying section and the tension applied to the yarn in relation to the operating state of the same embodiment; FIG. 1O is a perspective view showing the storage state of yarn by the air nozzle; FIG. 11 is a perspective view of another embodiment of the present invention. 1... Storage part, 2... Tension applying part, 3 - Slack absorbing part, 4... Thread, 6, 16.36.66... Tension member, 14.44.54... Surface contact part, 38. 48... Guide cylinder, 39... Stopper, 40, 50 - Guide piece, 61... Guide base. (2 others) Figure Figure

Claims (1)

[Scope of Claims] 1. A small-diameter cylindrical storage section that stores yarn as a weaving material in an unrestricted state; and a yarn that is movable in the direction of pulling out the yarn from the storage section and is drawn out. a tension applying section that applies a required tension by friction to the tension applying section, and a slack absorbing section that is stretched between the storage section and the tension applying section and applies tension so as to pull the tension applying section back toward the storage section using a tension member. A yarn feeding device characterized by comprising: and. 2. The tension applying section in the yarn feeding device according to claim 1 is caused to apply pressure contact force by a spring between the pair of surface contact portions that sandwich and grip the yarn, and the yarn to be pulled out is subjected to the required amount of friction due to friction. A yarn supply device characterized in that it is configured to be capable of applying tension. 3. The apparatus according to claim 1 or 2, characterized in that the frictional force of the yarn in the tension applying section is adjustable, and the tension applied to the yarn being pulled out is adjustable. Yarn supply device. 4. In the device according to claim 2, a stopper is provided near the mouth of the guide tube that guides the tension applying part and the tension member, and the tension applying part contacts the stopper, and when the tension applying part contacts the stopper, A yarn feeding device characterized in that a guide piece is provided which presses a pair of surface contact parts from behind to press them against each other, and the protruding position of this guide piece can be adjusted. 5. In the device according to claim 2, a wedge-shaped guide piece is provided near the opening of the guide cylinder that guides the tension applying part and the tension member, and faces the widened end portion of the surface contact part in the tension applying part. , when the expanded end portion of the surface contact portion is pressed against the guide piece when the thread is pulled out, the thread can be released from being held by pushing and expanding the surface contact portion with the guide piece. yarn feeding device. 6. A guide base that guides the yarn, which is the weaving material, and a guide base that is movable in the direction of pulling out the yarn from the guide base.
a tensioning section that applies a constant tension to the thread to be pulled out by friction; and a tensioning member that is tensioned between the guide base and the tensioning section and applies tension so as to pull the tensioning section back toward the guide base. A yarn feeding device characterized by comprising: a slack absorbing section for absorbing slack;