JPH0133567Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention mainly relates to an improvement of a single-flange plastic bobbin for winding long fiber threads.

Conventionally, this type of plastic bobbin with a single flange is
It is well known as a bobbin used for industrial purposes.

After winding various types of yarn in such a bobbin, in order to tighten the free end of the yarn, for example, the bobbin is wound on the cylindrical shaft of the bobbin, or the free end of the yarn is wrapped around one flange. A separate flanged disc or the like is fitted into the portion to fix each yarn to the bobbin and prevent its loosening.

However, such a tightening means requires considerable complexity, and the post-processing of the yarn after winding is troublesome, and the same number of flanged discs as the bobbin must be prepared in advance to be discarded when the bobbin is used. , which has disadvantages that are industrially undesirable.

A bobbin has also been proposed in which a slit groove is bored and the free end of the yarn is guided and locked into the groove, but if the bobbin is made of wood, the yarn can be moved through the slit groove due to the expansion and contraction of the material. It is also possible to lock the yarn, but if the material is plastic, it naturally does not expand or contract, and due to its own slipperiness, it is impossible to lock the yarn in the groove if it is just a slit groove. becomes. In particular, long fiber yarns made of chemical fibers are slippery due to the lack of fluff, and proper locking cannot be expected.

The present invention provides a plastic bobbin with a single flange, which is equipped with a means for extremely simply and quickly locking the end of the yarn wound on the bobbin to the bobbin body. It is a plastic bobbin body A with a single flange of a constant thickness, in which a funnel-shaped collar part 2 having an edge ring part 3 is aligned with one end of a cylinder shaft 1, and the top of the rim ring part 3 does not reach from the inner surface to the outer surface. Wedge-shaped notches 4, 4a are formed at two adjacent locations with lines parallel to the cylinder axis 1, and grooves 5 are formed from the outer surface of the edge ring 3 toward the top line of each notch 4, 4a. , 5a are omitted, and are integrally molded so that the top lines of the notches 4, 4a and the innermost surfaces of the grooves 5, 5a are continuous with thin films 6, 6a. .

Specific examples of the present invention will be described below.

A funnel-shaped cylinder with an edge ring 3 formed at one end of a cylindrical shaft 1 which is provided with thread-preventing means, such as a group of ring-shaped protrusions, on the outer circumferential surface and fixing means, such as a group of protrusions in the axial direction, on the inner circumferential surface. The flange portions 2 are aligned to produce a plastic bobbin body A with a single flange having a constant thickness.

Two adjacent wedge-shaped notches 4, 4a are formed in the edge ring 3, and the wedge-shaped notches 4, 4a have their apex lines parallel to the axis of the cylinder shaft 1, The entire width of the ring part 3 is cut out from the inner surface to the outer surface of the edge ring part 3 so that the apex line does not reach the outer surface.

Further, the edge ring portion 3 is provided with grooves 5, 5a on the outer surface facing the notches 4, 4a.
The innermost surface is formed so as to be continuous with the top line and the thin films 6, 6a.

The bobbin body A of the present invention is integrally molded from plastic, such as vinyl chloride, by injection molding.

In the present invention, after winding the yarn B onto the bobbin body A, the yarn B is gripped near the free end with fingers, hooked onto the notch 4 close to the winding direction, and passed to the edge loop 3. When a slight tensile force and pressing force are applied to the thread B against the end surface of the edge ring 3, the plastic thin film 6 that connects the apex line of the notch 4 and the innermost surface of the groove 5 is slightly cut off from the end by the pressing force of the thread B, and at the same time, a repetitive force, which is a characteristic of plastic, acts on the thread B, and the thread B is substantially clamped.

Next, when the yarn B is turned over from the inside of the edge loop 3 to the outside while maintaining the tensile force and pressure, the yarn B comes into contact with the outer end points of the notch 4a and the groove 5a, and as described above, the yarn B is immediately turned over. Cut the thin film 6a part,
At the same time, the yarn B is also held in this portion by the repeated force of the plastic.

As described above, in the present invention, the edge ring part 3 is provided on the single-flange plastic bobbin body A, and the specially arranged notches 4, 4a and grooves 5, 5a are formed.
By an extremely simple manual action of deflecting the free end of the yarn B from the outside of the edge loop 3 to the inside and then from the inside to the outside, the free end of the yarn B can be quickly and reliably locked at two points. That will happen.

Since the bobbin body A of the present invention is made of plastic, the yarn B can easily slide against the funnel-shaped collar 2, and especially the top lines of the notches 4, 4a and the grooves 5, 5.
The surfaces of the thin films 6 and 6a that connect the innermost side of the yarn B are soft and easily cut by the pressure applied to the yarn B.
The yarn side remains uncut.

In particular, the present invention has two wedge-shaped notches 4, 4a.
Since the grooves 5 and 5a are formed opposite to each other, the thread B can be guided very quickly through either the cutout portions 4 or 4a or the grooves 5 and 5a. Furthermore, since the thin film 6 is formed at the top line position of the notches 4 and 4a, the width of the thin film 6 itself is naturally narrow, and the contact position between the thin film 6 and the thread B during use, that is, the breaking position of the thin film 6 is determined naturally, and when the thin film 6 receives the pressing force of the yarn B from the longitudinal and oblique directions,
Since there is no misalignment between the yarn B and the thin film 6, there is no failure in the thread fixing operation, and even if some tension is applied to the yarn B after the thread is tied, the thread B remains in a stable fixed state. will be maintained. For example, if the thin film 6 itself is not formed at the apex position of the wedge-shaped notches 4, 4a and is used as a wide one, the breaking position of the thin film 6 due to the threads B will not be constant, resulting in distortion, and the breaking operation will lack stability. It is not possible to quickly fasten the thread, and furthermore, if tension is applied to the yarn B after thread fastening, unnecessary breakage occurs in the thin film 6 in the deflection direction, reducing the thread fastening force and at the same time causing the thread to loosen when used again. arise.

Furthermore, due to the repetitive force that is a characteristic of plastic, the thread B is strongly held between the cut parts of the thin films 6 and 6a, so that even during transportation, the free end of the thread B loosens and falls off as before. This arrangement has the advantage of being able to maintain the thread B in tension at all times.

Furthermore, since the single-flange plastic bobbin of the present invention is manufactured by so-called injection molding, it is not only easy to manufacture but also inexpensive.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of the plastic bobbin body with a single flange according to the present invention, FIG. 2 is a front view of the flange, and FIG. 3 is an enlarged perspective view of the main part of the edge ring. A...Plastic bobbin body with one flange, B...
Thread, 1...Cylinder shaft, 2...Funnel-shaped flange, 3...Edge ring, 4, 4a...Notch, 5, 5a...Concave groove,
6, 6a...Thin film.

Claims (1)

[Scope of utility model registration request] Funnel-shaped collar portion 2 having an edge ring portion 3 at one end of the cylinder shaft 1
It is a plastic bobbin body A with a single flange of a constant wall thickness that has a uniform wall thickness, and wedge-shaped notches are provided at two adjacent locations with the apex line parallel to the cylinder axis 1 without reaching the outer surface from the inner surface of the rim ring portion 3. At the same time as forming the parts 4 and 4a, each notch part 4 and 4 is formed from the outer surface of the edge ring part 3.
The grooves 5, 5a are cut out toward the top line of the grooves 4, 5a, and the grooves 5, 5a are integrally molded so that the top lines of the notches 4, 4a and the innermost surfaces of the grooves 5, 5a are continuous with the thin films 6, 6a. Features a plastic bobbin with a single flange.