JPH0218041Y2 - - 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 using a paper tube for the bobbin body.

[Conventional technology]

The bobbin body for thread winding is made of various materials such as metal tubes, synthetic resin tubes, wood tubes, and paper tubes.

Recently, paper tubes are often used for the main bodies of small-diameter bobbins due to cost considerations and the fact that they do not have a negative impact on the thread, but these paper tubes are generally cut off to prevent the thread from getting caught on the shoulder. The ends are bent inward.

The bobbin configured as described above is attached to a spindle and thread is wound onto its surface while being rotated at high speed. When the bobbin is fully wound, the bobbin is placed on a creel stand in order to perform the next processing on the thread on the bobbin. Attach it to the pin shaft (support shaft) of.

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. 4, the bobbin B of this invention has tip bent portions 2 and 3 formed at both ends of a bobbin body 1 made of a paper tube, and a ring-shaped synthetic resin made of ring-shaped bent portions 2 and 3 are formed at both ends of the bobbin body 1 made of a paper tube. A protector 4 is inserted.

The spindle of the winding device is brought into contact with the inner diameter portion of this protector 4 to be positioned, and the elastic force of the bent portions 2 and 3 having an arcuate cross section is used to
A ring body 4 with a “F”-shaped cross section is press-fitted,
The elasticity of the tip bent portions 2 and 3 decreases during yarn winding, and the fitting and fixation of the ring body 4 becomes loose, making it easy for the ring body 4 to fall off. Therefore, the bobbin B on which the thread is wound
When the ring body 4 is attached to the support shaft of the creel stand, the ring body 4 hits the tip of the support shaft and falls off from the bobbin body 1. Further, if the ring body 4 tends to fall off, it causes play during winding of the thread, causing the bobbin to swing easily.

FIG. 3 shows a bobbin body 1 made of paper tube with ring bodies 4a made of synthetic resin fitted into both cut-off ends. This ring body 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.
An adhesive is applied between them to prevent them from falling off.

However, the bobbin was not satisfactory due to the following drawbacks. That is, (1) the ring body 4a cannot be completely prevented from falling off due to the adhesive and uneven application.

(2) If the amount of adhesive applied is excessive, it will ooze out from the joint to the surface, and as it dries and hardens, small grains will form, and when the thread is released, the thread will get caught in the grains, causing uneven tension and single thread. This may cause problems such as cutting. In addition, the adhesive seeping onto the surface may cause the bobbins to adhere to each other, damaging or contaminating the surface, and making it impossible to smoothly release the thread due to adhesion of the wound thread.

(3) When installing the bobbin on the creel stand, the tip of the pin (or support shaft) of the creel stand gets caught on the flange 4b that comes into contact with the pin,
There is a drawback that the ring body 4a is pushed out and removed.

[Purpose of invention]

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

[Summary of the idea]

In order to achieve the above object, the present invention includes a bobbin body made of a paper tube with at least one end bent inward to form a bent end, and a ring-shaped protector made of synthetic resin that is secured to the bent end. The protector consists of a disc part with a hole in the center that protects the end of the main body, and is planted around the hole in the disc part,
The protective body is composed of a plurality of claw bodies having protrusions that are latched to the bent portion, and a bearing guide formed inside the plurality of raised claw bodies, and the protection body includes:
The bobbin for winding yarn is characterized in that the bent end portion of the bobbin is held between the projection portion and the disc portion so as to sandwich the bent end portion of 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 thread winding bobbin according to an embodiment of the present invention, and FIG. 2 is a ring-shaped protector fixed to the end of the bobbin body.

The bobbin main body 10 is made of a paper tube, and has front bent portions 11 and 12 formed by bending both cut-off ends inward, bonding the inner surfaces together, and folding the bobbin body into a double fold. A ring-shaped protector 13 is fitted and fixed to the double-structure bent portion 12.

This ring-shaped protector 13 has a claw body 1 consisting of a protrusion 14 and a plate part 15 that supports the protrusion 14.
6 are arranged in a cylindrical shape to form a claw assembly 17, and this claw assembly 17 is planted on a disc part 18. A hole 19 for a spindle is formed in the center of the claw assembly 17.

Since the claw assembly 17 is made up of a large number of claw bodies 16 assembled into a cylindrical shape, a small gap S is formed between the claw bodies 16. Therefore, the claw assembly 17
When inserted into the double bent portions 12 formed at both ends of the bobbin body 10, the claw assembly 17
The outer diameter of the protrusion 14 of the claw body 16 and the disc part 18 are reduced and enlarged again after being fitted with the bent end part.
A ring-shaped protector 13 is secured to the bobbin body in such a manner that the double bent end portion 12 of the bobbin is held between the two.

The inner surface of the plate portion 15 of the claw body 16 constituting the claw assembly 17 is formed into a cylindrical shape, and the disc portion 1 is formed into a cylindrical shape.
Tapered surfaces 20, 20' are formed on the inner surfaces of the hole 19 side and the protrusion 14 side of 8 to prevent the support shaft of the creel stand from getting caught, and the hole 19 also prevents the support shaft of the creel stand from getting caught. Forms a bearing guide.

Bent portions 12 formed at both ends of the bobbin body 10
and the protrusion 14 of the ring-shaped protector 13.
The distance l' between the rear end surface A and the disc part 18 is approximately equal, and as shown in FIG. At the same time, the rear end surface A of the protrusion 14 and the disc part 18
The bent portion 12 is sandwiched between the ring-shaped protector 13 and the bobbin body 10.

[Effect of idea]

In the present invention, both ends of a bobbin main body 10 made of a paper tube are double-folded inward to form a bent end portion 12.
A claw assembly 17 is formed by arranging the claw bodies 16 made up of the projections 14 and the plate parts 15 in a cylindrical shape, and a ring-shaped protector 13 in which the claw assembly 17 is erected on the disc part 18 is attached to the bent part 12. The disc part 18 and the protrusion part 1 are fitted together.
It is characterized in that the bent end portion 12 of the double structure is sandwiched between the rear end surfaces A of 4 and 4, and the following effects can be achieved.

(1) The part of the ring-shaped protector 13 that fits into the bobbin body 10 is flexible because it is composed of the claw assembly 17, and therefore the ring-shaped protector 13 is flexible.
It can be attached by simply inserting it into the end of the bobbin body 10 on the side of the bent portion 12, and the plate portion 1 of the claw body 16
The claw assembly 17 is pressed against the surface of the bent portion 12 by the elastic force of the ring-shaped protector 13.
will be fixed.

(2) Unlike conventional bobbins, the ring-shaped protector 13 is not bonded using an adhesive, so there is no chance of it falling off or the adhesive seeping out.

In addition, the claw assembly 17 is arranged in a cylindrical shape and has elasticity as a whole, so even if the tip bent part 12 is slightly deformed, it can follow this, and the ring-shaped The protector 13 will not fall off.

Furthermore, when the bobbin is attached to the creel stand, the ring-shaped protector 13 will not be pushed out and come off at the tip of the support shaft of the creel stand.

(3) Furthermore, since the plate portions 15 of the claw assembly 17 are arranged in a cylindrical shape and hold the periphery of the spindle, the fit is good and there is no possibility of center runout.

(4) The end of the paper tube bobbin main body is protected from damage by the disc part 18 of the ring-shaped protector 13, and identification symbols and numbers can be written on the surface of the disc part, making it easy to use. It's convenient.

(5) By having the disk part 18 of the ring-shaped protector 13, the bobbin of the present invention can be inserted into the spindle of a winder, and when winding yarn, the clamping pressure of the spindle, vibrations during rotation, etc. Since the various stresses can be dispersed to the bobbin body, it is possible to avoid changes over time such as the stress being concentrated on the tip bending portion and the tip bending progressing.

(6) The overall length of the bobbin body is stabilized.

[Brief explanation of the drawing]

Fig. 1 is a front view of a bobbin according to an embodiment of the present invention with half cut away, and Figs. 2 A, B, and C show a ring-shaped protector fixed to the end of the bobbin body. , Figure A is a left side view, Figure B is a front view with half cut away, and Figure C is a right side view. Third
FIG. 4 is a front view showing a conventional bobbin with half cut away. 10...Bobbin body, 11, 12...Double bent end portion, 13...Ring-shaped protector.
14... Protrusion, 15... Plate, 16... Claw body,
17... Claw assembly, 18... Disc part, 19...
Hole part, 20...Tapered part.

Claims (1)

[Scope of utility model registration request] It consists of a bobbin body made of a paper tube with at least one end bent inward to form a bent part, and a ring-shaped protector made of synthetic resin that is locked to the bent part, and the protector is a ring-shaped protector of the main body. A disc part with a hole in the center to protect the end part, a plurality of claw bodies having protrusions that are planted around the hole of this disc part and are locked to the bent end part, and the said planted part. Consists of a bearing guide formed inside a plurality of claw bodies,
A bobbin for winding yarn, wherein the protector is locked to the bent end portion of the bobbin so as to sandwich the bent end portion between the protrusion portion and the disc portion.