JPH0654789U - Bobbin - Google Patents

Abstract

(57) [Abstract] [Purpose] A thread having a high hygroscopicity is wound around without stretching or slipping even if it is stretched by water absorption and loosened so that proper feeding can be performed. [Structure] A large number of small projections 7 are provided at appropriate intervals in the axial direction on the outer peripheral surface of a winding core 1 having flanges 2 and 2 at both ends, and the small projections 7 bite into a bundle of yarn wound by coil winding. It was designed to prevent contact and slip and slip.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a bobbin suitable for winding embroidery thread.

[0002]

[Prior art]

 In an embroidery machine that drives a needle while giving a motion to a base cloth according to a predetermined pattern to create a pattern or design on the base cloth, a large number of spools wound with the embroidery thread are used. Embroidery threads are fed all at once.

[0003] The bobbins are supported one by one by inserting cylindrical winding cores into a large number of support shafts projecting at right angles to a plate frame made of wood or metal, and one flange is brought into contact with the plate frame. By doing so, the braking force due to the friction of each other is obtained, and rotation and stop are repeated in small steps in response to the movement of the needle.

On the other hand, an embroidery thread can be wound around a winding core simply by winding it with a coil, not with a twill winding, etc., and is a regenerated fiber such as viscose rayon or bemberg, or a semi-synthetic material such as acetate. In the case of long fibers such as fibers, when the atmosphere becomes highly humid, it stretches and loosens, spinning idle against the bobbin and accurately rotating and stopping in response to the needle movement of the piercing machine. May not be carried out, or the embroidery thread may be fed out with the thread winding stopped, whereby the extra embroidery thread fed between the thread winding and the needle is fed to another embroidery thread. It may cause troubles such as being entangled with the thread and changing the tension or cutting. Further, if the embroidery thread wound around the winding core by the coil winding becomes loose, the embroidery thread is displaced in the axial direction of the winding core, which may cause the feed-out modulation.

[0005]

[Problems to be solved by the device]

 The problem to be solved by the present invention is to use a thread such as a stab thread wound around a winding core by coil winding, which is made from long fibers having a high hygroscopic property, and is used for spinning or axial direction. There is no thread winding that can be wound without slipping, which may cause troubles such as deviation of tension or cutting due to entanglement or modulation of feeding.

[0006]

[Problems to be solved by the device]

 The present invention solves the above problems and provides a thread winding that allows a thread made of a hygroscopic long fiber as a raw material to be wound by coil winding without spinning or shifting in the axial direction. It is intended. For this purpose, the present invention has a structure in which a plurality of small projections are provided on the outer peripheral surface of the winding core at appropriate intervals in the axial direction in a bobbin winding having a collar at both ends of a cylindrical winding core.

[0007]

[Action]

 When the yarn wound around the winding core by coil winding absorbs moisture and expands, the yarn loosens with respect to the outer circumference of the winding core, but small protrusions bite into the core of the winding bundle and contact the yarn at multiple points. Therefore, idle rotation and axial displacement can be prevented, and the yarn and the bobbin will rotate and stop together.

[0008]

【Example】

 An embodiment of the present invention will be described with reference to the drawings. A cylindrical winding core 1 and disk-shaped collars 2 and 2 at both ends thereof are integrally formed by molding a synthetic resin, and their center is formed. A shaft hole 3 is provided through which the shaft is fitted.

The inner surfaces of the collars 2 and 2 facing each other are slightly inclined in a conical shape, and the disk-shaped protrusions 4 and 4 are integrally formed at the center of the outer surface of the collar 1. A groove 6 is formed on the outer peripheral surface and extends over the entire length in the axial direction. The groove 6 extends in the radial direction on the inner side surfaces of the collars 2 and 2. In addition, the outer surfaces of the protrusions 4 and 4 are formed as uneven surfaces 5 and 5 made of mesh knurls. The groove 6 is for quickly and completely removing the residual thread wound around the recovered thread by cutting it by fitting and guiding the blade edge of the cutter. Further, when the uneven surface 5 is mounted on an automatic embroidery machine, the uneven surface 5 comes into contact with a plate frame having a support shaft to generate a large frictional force and to act as a brake.

On the opposite side of the groove 6 with the center of the outer peripheral surface of the winding core 1 sandwiched, a large number of short needle-shaped small projections 7, which are the main components of the present invention, are provided at appropriate intervals in the axial direction. The concave-convex surface 5, the groove 6 and the small projection 7 are formed simultaneously when the winding core 1, the collars 2 and 2 are formed.

When the yarn is wound around the winding core 1 having a large number of small protrusions 7 by coil winding in this manner, a large number of small protrusions are formed in the layer of the winding bundle that is in contact with the winding core 1 and the layer close to the winding core 1. 7 bites and comes into contact with the thread at many points.

Therefore, as described above, when the yarn is made from regenerated fibers such as viscose rayon and Bemberg and long fibers such as semi-synthetic fibers such as acetate, it absorbs moisture in the atmosphere. Then, even if it is stretched and loosened between itself and the outer peripheral surface of the winding core 1, the small protrusions 7 bite in the core portion of the winding bundle and come into contact with the yarn at many points, so that the winding core 1 and the winding bundle Rotate and stop together without slipping. That is, even if the winding bundle loosens due to the elongation of the yarn, it does not slip with respect to the winding core 1, and the winding core 1 cannot rotate and stop in response to the movement of the needle of the embroidery machine. Alternatively, the inconvenience that the yarn is fed while the winding core 1 is stopped is avoided. Further, even if the looseness as described above occurs when the remaining amount of the yarn becomes small due to consumption, the small protrusion 7 serves as a stopper to prevent the movement in the axial direction.

The small protrusions 7 are arranged on a straight line in the axial direction of the winding core 1. However, the present invention is not limited to this, and the small protrusions 7 may be arranged out of phase as long as they have an appropriate interval in the axial direction. The object of the present invention can be achieved.

[0014]

As described above, according to the present invention in which a large number of small protrusions are provided on the outer peripheral surface of the winding core at proper intervals in the axial direction, according to the present invention, when a thread having high hygroscopicity is wound by coil winding, Even if this yarn absorbs moisture in the air and stretches and loosens, the idleness and slipping movement are prevented by the small protrusions, and there is a problem that the yarn is entangled with other yarns to change the tension or break it, and it causes inconvenience in feeding. It is eliminated and the proper feeding can be always performed.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an embodiment of the present invention.

FIG. 2 is a plan view of FIG.

[Explanation of symbols]

 1 core, 2 collars, 3 shaft holes, 7 small protrusions,

Claims (1)

[Scope of utility model registration request] 1. A bobbin winding having a collar at each end of a cylindrical winding core, wherein a plurality of small projections are provided on the outer peripheral surface of the winding core at appropriate intervals in the axial direction.