JPH0126700Y2 - - Google Patents

Description

[Detailed description of the invention] [Technical field of the invention] The present invention provides a bobbin for winding yarn, particularly a bobbin in which a paper tube is used for the bobbin body, and the end face is protected by a synthetic resin protector. It is something to do.

[Conventional technology]

The bobbin for yarn winding uses various materials such as metal tubes, synthetic resin tubes, wood tubes, and paper tubes for the bobbin body.

Recently, paper tubes have been widely used for small-diameter bobbin bodies due to cost considerations and the fact that they do not adversely affect the yarn. In order to prevent this, the cut end is generally bent inward.

The bobbin, which has been subjected to the bending process as described above, is attached to a spindle and is rotated at high speed to wind yarn onto its surface. Once the bobbin is fully wound, the next process is applied to the yarn on this bobbin. To do this, attach the bobbin to the pin shaft (support shaft) of the creel stand.

On the other hand, in order to mount the bobbin on the spindle of the winding device without the core wobbling,
A device according to Publication No. 17015 has been proposed.

As shown in FIG. 7, the bobbin of this invention has bent end portions 2 and 3 formed at both ends of a bobbin body 1 made of a paper tube, and a ring-shaped protective body made of synthetic resin is attached to the bent end portions 2 and 3. 4 has been inserted.

The spindle of the winding device is brought into contact with the inner diameter portion of this protector 4 for positioning.
A ring-shaped protector 4 with a ``F''-shaped cross section is press-fitted, and the elasticity of the bent portions 2 and 3 often decreases during yarn winding, and as a result, the protector 4 loses its elasticity. The fitting and fixing becomes loose, and the protector 4 becomes easy to fall off. Therefore, when the bobbin B wound with yarn is mounted on the support shaft of the creel stand, the protector 4 hits the tip of the support shaft and falls off from the bobbin body 1.

Further, if the protector 4 tends to fall off, there is a problem that play occurs during winding of the yarn, and the bobbin tends to swing.

FIG. 8 shows a bobbin main body 1 made of a paper tube, with protectors 4a made of synthetic resin fitted into both cut-off ends. This protector 4a has a collar part 4b that contacts the spindle and a cylindrical part 4c that contacts the inner surface of the bobbin body 1, and adhesive is bonded between the cylindrical part 4c and the bobbin body 1 to prevent it from falling off. agent has been applied.

However, the bobbin has the following drawbacks and is not satisfactory. That is, (1) If the amount of adhesive applied is too large, it will ooze out onto the surface of the bobbin B and adhere to the yarn to be wound, making it impossible to unwind the yarn smoothly and causing the yarn to become unwinded. To contaminate.

(2) When the bobbin is attached to the creel stand, the tip of the pin shaft (support shaft) of the creel stand gets caught on the flange 4b that comes into contact with the pin, and the ring body 4a is pushed out and comes off.

[Purpose of invention]

The present invention solves the drawbacks of the conventional bobbin end reinforcement structure.The synthetic resin protector does not come off, it is easy to fit onto the spindle, and the core can be reliably drawn out. The object of the present invention is to provide a thread winding bobbin made of a paper tube.

[Summary of the idea]

In order to achieve the above object, the present invention includes a protective body fitted to the double bent portion of the paper tube bobbin body, and the protective body is formed in the vicinity of the annular protrusion and the annular protrusion. a flange that abuts the end of the double bent portion; an elastic piece that fits into the inner surface of the double bent portion; and an end face of the double bent portion provided at the tip of the elastic piece. This bobbin has a protective body at its end, and is characterized by having a protrusion that is engaged with the bobbin.

〔Example〕

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a partially cutaway front view of a bobbin according to an embodiment of the present invention, and FIG. 2 is a plan view thereof.

Bobbin B is a bobbin body 10 made of a thick paper tube.
and a protector 11 fitted to the end thereof. Then, the inner surface of the end of the bobbin body 10 is cut off to form a stepped portion 13, the thin portion 14 is bent inward to form a bent portion 12, and the bent thin portion 14 is folded. Glue under pressure to the unbent part to create a double structure.

Note that the end surface 15 of the thin portion 14 and the stepped portion 13 are formed in a ring shape, and the end surface 15 is an important portion for locking the protector described below.

Now, the protector 11, which constitutes an important member in the bobbin of the present invention, is an integrally formed synthetic resin product, and includes an annular portion 16 having an arcuate cross section for smoothly guiding the thread, and this annular protrusion. It is composed of a flange 17 that protrudes outward in an annular shape from the lower part of the flange 16 and is located at the end of the bent portion 12, and a plurality of claws 18 extending from the inside of the flange 17. 1
8 is composed of an elastic piece 19 and a protrusion 20 provided at the tip thereof.

The distance between the end surface 15 of the thin portion 14 and the stepped portion 13 formed by cutting out the thickness is such that the projection 20 at the tip of the claw portion 18 is accommodated and there is as little play as possible.

Therefore, the protector 11 of this embodiment is formed in the shape of a crown by having a large number of claws 18 protrude in an arc shape from the annular protrusion 16. An inclined surface M is formed on the outer surface of the claw portion 18, and an inclined surface N is formed on the inner surface, and the inclined surface M is formed on the bobbin body 1.
This makes it easier to insert into the bent part 12 of 0,
Further, the inclined surface N is provided to prevent the protector 11 from falling off due to collision with the spindle of the winding device.

Further, a disc part 21 is formed inwardly near the annular protrusion part 16 of the protector 11, and supports the label 22, and the hole 23 formed in the disc part 21 supports the label 22.
It is also possible to support the tip of the spindle of the winding device. Separately, this hole 23 is
It can also be used when using dotshua. In this case, the spindle is supported on the inner peripheral surface of the bobbin B.

A notch 25 for rotational driving is formed on the inner surface of the lower part of the bobbin main body 10, and the bobbin is driven by fitting this into an engaging part provided on a spindle portion of a winding device. Note that the notch 25 for driving the bobbin may be of other types that are generally used.

3 and 4 show a second type of protector 11, in which a protrusion 20a is integrally formed in an annular shape, and this protrusion 20a is extended from the lower part of the annular protrusion 16. It is supported by a plurality of elastic pieces 19a, and is generally shaped like a basket.

The protector 11 of this second embodiment has a protrusion 20
The claw portion 18a is formed integrally into an annular shape, and the strength of the claw portion 18a is relatively high because the slits 24 are provided at predetermined intervals in the cylinder. Therefore, even if the elastic piece 19a supporting the claw portion 18a is made thinner, it can be firmly fitted into the bent portion 12 formed at the end of the bobbin body 10.

Note that due to the properties of the synthetic resin, especially its hardness, it may be difficult to deform the claw portion 18a in the circumferential direction when the protector 11 is fitted to the end of the bobbin body 10. Partially (1
It is better to form slits in ~4 locations) or to form thinner parts in some areas to make it easier to deform.

5 and 6 show a protector 11 according to a third embodiment, and the structure of the protector 11 of the second embodiment shown in FIGS. 3 and 4 is slightly modified. It is something that

That is, the protrusion 2 formed on the protector 11 in FIG.
0a was formed entirely in an annular shape, but in this embodiment, notches 20c are partially provided and protrusions 20b are arranged at predetermined intervals in the circumferential direction of the protector 11. Therefore, the claw portion 18b
It is also formed in an annular shape similarly to the second embodiment.

In the embodiment shown in FIGS. 3 and 4, it may be difficult to deform the claw portion 18a depending on the properties of the synthetic resin used, but in the embodiment shown in FIGS. In this case, since the projections 20b are partially formed, there is an advantage that the claws 18b can be easily deformed in the circumferential direction when the protector 11 is attached to the end of the bobbin body 10. Therefore, in the case of this embodiment, the provision of slits in the claw portion 18b is omitted, and even if provided, the number of slits may be small.

[Effect of idea]

As explained above, the bobbin B according to the present invention includes the bobbin body 10 in which the bent part 12 is formed at the end of the bobbin body 10, and the protective body 11 made of synthetic resin that is fitted into the bent part 12. This protector 11 is characterized in that claws 18 having protrusions 20 that are engaged with the end surface 15 of the bent portion 12 are arranged in an annular shape.

Therefore, according to the present invention, the end of the bobbin body 10 can be protected by simply fixing the synthetic resin protector 11 to the bent portion 12 of the end of the bobbin body 10.
Winding and unwinding of the yarn can be performed smoothly.

Further, the protrusions 20 formed on the claws 18 arranged in a cylindrical shape on the protector 11 engage with the bent end surface 15 of the bent portion 12 on the bobbin body 10, so that the protector 11 can be attached to the end of the bobbin body 10. Although it can be easily fixed to other parts, it has a structure that strongly resists falling off.

Therefore, even if the spindle of the winding device collides with this protector 11, or even if the fully wound bobbin is lifted from the hole 23 of the protector 11 when being removed from the spindle, the fully wound bobbin will not be removed. Even if the pin shaft (support shaft) hits when installing it on the creel stand,
This protector 11 rarely comes off.

[Brief explanation of the drawing]

FIG. 1 is a front view showing a bobbin according to an embodiment of the present invention with half cut away, and FIG. 2 is a plan view thereof.
3 and 4 show a protector according to a second embodiment, with FIG. 3 being a front view with half cut away, and FIG. 4 being a plan view thereof. 5 and 6 show a protector according to the third embodiment, and FIG.
The figure is a front view with half cut away, and FIG. 6 is a plan view of the same. 7 and 8 are front views of a conventional bobbin with half cut away. 10...Bobbin body, 11...Protection body, 12...
...Bending part, 13...Step part, 14...Thin part, 1
5... End face, 16... Annular protrusion, 17... Flange, 18... Claw, 19... Elastic piece, 20... Protrusion, 21... Disc part, 22... Label, 23...
... hole, 24 ... slit, 25 ... notch.

Claims (1)

[Scope of utility model registration request] A protective body is fitted to a double bent portion formed at the end of the paper tube bobbin body, and the protective body includes an annular protrusion and a double bent portion formed near the annular protrusion. an elastic piece that fits into the inner surface of the double bent part; and a protrusion that is provided at the tip of the elastic piece and is locked to the end face of the double bent part. 1. A bobbin having a protective body at an end thereof.