JPH0718072B2 - Yarn feeder - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a yarn supplying device with a tension applying mechanism capable of supplying a woven material such as a yarn while stably maintaining a tension set in a textile machine. It is about.

[Prior Art] A tension applying device used in a textile machine usually draws a yarn wound around a bobbin under a constant tension. However, when weaving a large number of yarns at a high density, it is necessary to install a large number of bobbins in parallel, and when the yarn becomes loose, it is necessary to be able to pull it back. And it is very difficult to place them in a limited space. Further, if the size of the bobbin is reduced by a means such as reducing the diameter of the bobbin, the bending and friction of the yarn are further increased, and the damage of the yarn is increased.

As a method for dealing with such a problem, there is a method of binding a thread to a tension rubber or a spring to apply tension,
When the extension dimension of rubber or spring changes, the tension also changes,
The change in tension affects the tissue.

In addition, even when the tension of the yarn can be kept substantially constant, it is possible to easily adjust the tension or to prevent the tension from stably exceeding a certain value with a simple structure. It is relatively difficult to attach a thread tension adjusting mechanism to the modified device.

[Problems to be Solved by the Invention] A technical problem of the present invention is that it is possible to stably feed out a stored yarn with a constant tension or less, and to pull it back even if the yarn becomes loose. Another object of the present invention is to provide a small-sized and simple yarn supply device in which the tension can be easily adjusted or the fixed value is not stably exceeded.

[Means for Solving the Problems] A yarn supply device of the present invention for solving the above-mentioned problems is basically a thin-diameter tubular storage part for storing a yarn that is a weaving material, and the above-mentioned storage. It is movable in the direction of pulling out the yarn from the part, and between the pair of surface contact parts that sandwich and grip the yarn,
A tension applying portion that applies a pressing force by a spring to give a required tension to the drawn yarn by friction and the storage portion and the tension applying portion are stretched, and the tension applying portion is provided by the tension member. And a slack absorbing portion that applies a tension so as to pull it back to the side.

In the above yarn supplying device, a stopper for contacting the tension applying section is provided near the mouth of the guide tube for guiding the tension applying section and the tension member, and a pair of surfaces are provided when the tension applying section contacts the stopper. It is possible to provide a guide piece that presses the contact portion from the back and presses them against each other, and the protruding position of the guide piece can be adjusted.

Further, in the yarn supply device, a wedge-shaped guide piece is provided near the mouth of the guide tube that guides the tension applying section and the tension member, and faces the tip widening section of the surface contact section of the tension applying section. When pulling out the yarn, when the tip widening part of the surface contact part is pressed against the guide piece, the guide piece shall be able to release the holding of the yarn by expanding the surface contact part. You can

[Operation] According to the yarn supplying device having the above configuration, when the yarn sandwiched between the surface contact portions in the tension applying portion is pulled out, a constant tension is applied by friction and a stable constant tension is applied. In addition, it is possible to supply a relatively long woven material. Further, with a tension equal to or lower than the tension applied in the tension applying portion, the slack of the yarn can be absorbed by the force of the tension member in the slack absorbing portion, and the holding force of the surface contact portion in the tension applying portion and the tension member of the slack absorbing portion From the time when the forces become equal, the yarn is sent out with a constant tension.

In the above yarn supplying device, when the stopper for contacting the tension applying portion and the guide piece for pressing the pair of surface contact portions from behind are provided and the projecting position of the guide piece is adjustable, the yarn is pulled out. Along with this, when the tension applying part comes into contact with the stopper, the surface contact part is pressed by the guide piece, so a high tension is applied to the yarn, and the tension is easily adjusted by adjusting the protruding position of the guide piece. Can be set.

Further, a wedge-shaped guide piece is provided to face the tip widening portion of the surface contact portion in the tension applying portion, and when the tip widening portion of the surface contact portion is pressed against the guide piece, the guide piece causes the surface contact portion to move. In the case of pushing and spreading, the holding of the yarn is released by the pushing and spreading of the surface contact part due to the pulling out of the yarn, and the tension decreases, so that the release of the yarn when the tension exceeds a certain level is reliable. To be done.

Thus, the above-described application of tension can be realized by a small and simple device which requires only a small space in a linear arrangement.

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

FIG. 1 is for explaining the basic structure of the yarn supplying device of the present invention.

This yarn supplying device applies a tension to a storage portion 1 for storing the yarn 4 which is a weaving material in an unconstrained state, and a constant tension by friction to the yarn 4 drawn from the storage portion 1. A portion 2 and a slack absorbing portion 3 composed of a tension member 6 such as a spring stretched between the storage portion 1 and the tension applying portion 2 are provided, and these are arranged in a straight line or a state close to a straight line. .

The storage section 1 is configured by a hollow cylindrical container 7 having a small diameter so that the yarn 4 can be stored in a natural accumulation state without winding the yarn 4 around a bobbin, and stores the yarn 4 by blowing it with a nozzle or the like. For this reason, the bottom portion 8 is formed in a net shape, and although not shown, a guide hole for passing the yarn 4 is provided in the end plate on the yarn lead-out side. Further, the tension applying section 2 is configured to apply a pressure contact force by a spring between a pair of surface contact portions 14, 14 that sandwich and hold the yarn 4 to apply tension by friction to the yarn. , Specifically, the insertion hole 13 of the thread 4 in the center
By bending both ends of the leaf spring 12 having the above, and contacting each other with an appropriate force at the surface contact portion 14, and sandwiching and gripping the yarn 4 between them, a constant tension due to friction is exerted on the drawn yarn 4. I am able to give it. Reservoir 1
The slack absorbing part 3 provided between the tension applying part 2 and the tension applying part 2 is provided with the end plate 9 of the storage part 1 and the tension applying part at both ends of the tension member 6 made of a coil spring having the thread 4 inserted through the center thereof. It is connected around the insertion hole 13 in the portion 2, and thereby tension is applied so as to pull back the tension applying portion 2 to the storage portion 1 side.

As the tension member of the slack absorbing portion 3, as shown in FIG. 2, a tension member 16 made of a plurality of rubbers or springs can be used.

In the yarn supplying device having the above structure, the yarn 4 sandwiched between the surface contacting portions 14 of the leaf springs 12 in the tension applying portion 2
When the yarn is pulled out, a constant tension is applied by friction, and the slack of the yarn 4 is absorbed by the movement of the tension applying portion 2 in the yarn drawing direction by the tension member 6. As a result, it becomes possible to supply a relatively long weaving material while stably applying a constant tension, and this can be realized by a structure that requires only a space having a small linear arrangement.

The relationship between the displacement of the tension applying portion 2 and the tension that can be applied to the yarn will be described. When the tension is less than the tension (drawing resistance) applied in the tension applying portion 2, the yarn is applied by the tension member 6 in the slack absorbing portion 3. The slack can be absorbed, and 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 sent out with a constant tension.

The yarn supplying device according to the present invention can be set to a required tension by attaching a simple adjusting mechanism to the tension applying section 2 having the structure shown in FIGS. 1 and 2 above. FIG. 3 shows the details of the essential parts of the first embodiment, and FIG. 4 shows the relationship between the displacement of the tension applying part and the tension that can be applied to the yarn in relation to the operating state of the same embodiment. ing.

As can be seen from FIG. 3 and FIG. 4, the yarn supplying device of the first embodiment extends the container 37 that constitutes the storage portion 1 of the yarn 4 to provide the tension applying portion 2 and the tension member 36. The guide cylinder 38 is provided with stoppers 39, 39 near the mouth of the guide cylinder 38, which both shoulders of a leaf spring 42 forming the tension applying portion 2 abut, and the leaf spring 42 abuts on the stopper 39. The guide pieces 40, 40 are provided on both sides of the leaf spring 42 so as to press the surface contact portions 44, 44 against each other when they stop. The projecting positions of the guide pieces 40, 40 can be adjusted by screws 41.

In the yarn supply device having the above-described configuration, when the leaf spring 42 of the tension applying portion 2 comes into contact with the stopper 39 when the yarn is pulled out, the guide piece 40 presses the surface contact portions 44, 44. As can be seen from FIG. 4, high tension is applied to the yarn. Further, with a simple structure in which the stopper 39 and the guide piece 40 are provided, a high tension can be applied, and the tension can be adjusted and set by adjusting the protruding position of the guide piece 40 with the screw 41.

Such a yarn supplying device can be effectively used in the following weaving. That is, in a loom (brader or the like) in which a yarn path difference occurs during weaving, the yarn is usually pulled out when the yarn carrier moves in a direction approaching the outer shape of the woven fabric. Further, at that time, a relatively large force for tightening the fabric is required. To this end, it is clear that the above-mentioned yarn supplying device that can apply a higher tension when pulling out the yarn than when absorbing the slack is effective.

In the embodiment shown in FIG. 5, the tension applying portion 2 is configured so that the tension can be reliably released when the yarn is pulled out by the guide.
The structure of is shown.

As can be seen from FIG. 5 and FIG. 6, the yarn supplying device provided with the tension imparting section 2 is located near the mouth of the guide cylinder 48, which is an extension of the container 47 that constitutes the reservoir 1 of the yarn 4. A wedge-shaped guide piece 50 is provided so as to face the front end widening portion of the surface contact portions 54, 54 of the leaf spring 52 forming the tension applying portion 2.

In the yarn feeder having the wedge-shaped guide piece 50, when the yarn is pulled out, the tip end widening portions of the surface contact portions 54, 54 of the leaf spring 52 of the tension applying portion 2 are pressed against the guide piece 50. , The contact piece 54, 54 by the guide piece 50
Is spread out, the holding of the yarn is released, and the tension is lowered as can be seen from FIG. Therefore, the yarn is reliably released when the tension exceeds a certain level.

When such a yarn supplying device is used for weaving a relatively low-density fabric, it is effective because the fabric cannot be applied with a certain tension or more.

The yarn supplying device described above can also be adapted to the tension setting of the yarn drawn directly from the bobbin or the creel.

[Effects of the Invention] According to the yarn supplying device of the present invention described in detail above, the accumulated yarn can be stably fed out at a constant tension or lower, and even when the yarn becomes loose, it can be discharged. It is possible to provide a small-sized and simple yarn supply device which can be pulled back and whose tension can be easily adjusted or which does not stably exceed a certain value.

[Brief description of drawings]

FIG. 1 is a perspective view showing a basic constitution of a yarn supplying device of the present invention, FIG. 2 is a perspective view showing another constitution example, and FIG.
FIG. 4 is a perspective view showing the structure of the main part of the first embodiment of the present invention, and FIG. 4 shows the relationship between the displacement of the tension applying part and the tension that can be applied to the yarn in relation to the operating state of the same embodiment. And FIG. 5 is a perspective view of a main part of the second embodiment in which the tension of the yarn can be released at the time of pulling out, and FIG. 6 shows the displacement of the tension applying part in relation to the operating state of the same embodiment. It is explanatory drawing which showed the relationship with the tension given to a thread. 1 ... storage part, 2 ... tension applying part, 3 ... slack absorbing part,
4 ... Thread, 6,16,36 ... Tension member, 14,44, 54 ... Surface contact part, 38, 48 ... Guide tube, 39 ... Stopper, 40, 50 ...
Guide piece,

Claims (2)

[Claims] 1. A small-diameter tubular storage portion for storing a yarn, which is a weaving material, and a pair of surface contact portions, which are movable in the pulling direction of the yarn from the storage portion and which sandwich and hold the yarn. In between, a tension applying part that applies a pressure contact force by a spring to apply a required tension to the drawn yarn by friction, and the tension applying part is stretched between the storage part and the tension applying part. A slack absorbing part that applies tension so as to pull back the storage part to the storage part side, and a stopper that contacts the tension applying part is provided near the mouth of the guide cylinder that guides the tension applying part and the tension member. A yarn feeding device characterized in that a guide piece is provided which presses the pair of surface contact portions from the back when the applying portion comes into contact with the stopper so as to make pressure contact with each other, and the protruding position of the guide piece can be adjusted. apparatus. 2. A small-diameter tubular storage portion for storing a yarn that is a weaving material, and a pair of surface contact portions that are movable in the drawing direction of the yarn from the storage portion and that sandwich and grip the yarn. In between, a tension applying part that applies a pressure contact force by a spring to apply a required tension to the drawn yarn by friction, and the tension applying part is stretched between the storage part and the tension applying part. A slack absorbing part that applies tension so as to pull back to the storage part side, and a tip expanding part of the surface contact part of the tension applying part near the mouth of the guide cylinder that guides the tension applying part and the tension member. A guide piece in the shape of a wedge facing each other is provided, and when the tip end widening part of the above-mentioned surface contact portion is pressed against the guide piece when the yarn is pulled out, the guide piece pushes the surface contact portion to spread the yarn. You can release the hold Yarn supply apparatus according to claim.