JPH074469U - Bobbin for bobbin - Google Patents

Abstract

(57) [Abstract] [Purpose] It is possible to prevent a local decrease in strength and improve durability, and further, to unwind the yarn easily, and
(EN) Provided is a bobbin for winding a yarn, which can prevent a single yarn from breaking and a single yarn from breaking when the yarn is unwound. [Constitution] A bobbin 1 for winding a bobbin having a jig 6 for bobbin thread attached.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention mainly relates to a bobbin for winding a yarn, which is used in a manufacturing process of spun yarn, a synthetic fiber, a weaving preparation process, and the like.

[0002]

[Prior art]

 As a conventional bobbin for bobbin winding, a bobbin having a structure as shown in FIG. 10 is generally used. That is, in such a bobbin 1, usually, kraft paper or the like is spirally wound in multiple layers on the surface of a mandrel, and the respective paper layers are adhered to each other to form a multi-layered paper tube main body 2. The surface paper 3 such as parchment paper or wrapping paper is attached to the surface.

In addition, in order to give the bobbin 1 produced in this way a thread-locking function, a notch is made near the axial end of the bobbin 1 by a cutting tool, and the bobbin 1 is cut along the circumferential direction. The thread stopping groove 4 and an inclined surface 5 for guiding the thread are formed in the thread stopping groove 4, and the starting end portion of the thread to be wound is guided to the inclined surface 5 and introduced into the thread stopping groove 4. Is designed to be gripped.

[0004]

[Problems to be solved by the device]

 However, according to such a thread stopping method using the thread stopping groove 4, since the bobbin 1 is rotated at a few thousand revolutions per minute when the thread is wound, centrifugal force is applied to the paper layer constituting the paper tube main body 2. There is a problem that the paper layer is easily peeled off at the portion of the yarn stop groove 4 where the strength is locally reduced due to breakage due to cutting of a blade due to action of wind force or wind force, resulting in low durability.

Further, the frictional resistance generated between the paper fibers of the paper tube main body 2 and the thread, which are broken by the blade when forming the thread stopping groove 4, becomes excessive than the frictional resistance required for thread stopping. In addition, when unwinding the thread, there is a problem that it is difficult to take out the thread from the thread stop groove 4, and there is a problem that the single thread constituting the thread is caught in the paper fiber and a single thread breaks or a single thread breakage occurs. there were.

In view of the above problems, the present invention can prevent a local decrease in strength, improve the durability, further facilitate the unwinding of the yarn, and at the time of unwinding the yarn. Another object of the present invention is to provide a bobbin for bobbin winding capable of preventing single yarn breakage and single yarn breakage.

[0007]

[Means for Solving the Problems]

 A bobbin for winding a bobbin according to the present invention for achieving the above object is provided with a jig for fixing a thread. The bobbin is preferably a paper tube in which kraft paper or the like is laminated in multiple layers, while the jig is preferably made of synthetic resin or metal having appropriate elasticity.

[0008]

[Work]

 Since the bobbin for bobbin of the present invention has the above-mentioned structure and does not have any notch by the blade unlike the conventional bobbin, its strength is locally reduced even when subjected to centrifugal force or wind force due to rotation. Since there is no part to do, the durability of the bobbin is improved. Furthermore, by considering the conditions such as the thread quality and thread diameter of the thread to be wound, the material of the jig and the clearance for thread grip formed between the jig and the bobbin surface can be adjusted arbitrarily. While generating the frictional resistance required for thread stopping, it prevents the occurrence of excessive frictional resistance that may cause single thread breakage or single thread breakage during thread unwinding, and has an appropriate thread gripping force. I can do it.

[0009]

【Example】

 An embodiment of the bobbin for bobbin winding according to the present invention will be described below with reference to the drawings. 1 to 6 show a bobbin 1 of Example 1, in which a kraft paper laminated with a synthetic resin film is spirally wound in multiple layers on the surface of a mandrel and the paper layers are adhered to each other by heat welding. A multi-layered paper tube main body 2 is formed, and a surface paper 3 made of parchment paper is attached to the front surface of the paper tube main body 2 to integrally form the paper tube main body 2.

At the left end of the bobbin 1, there is attached a J-shaped jig 6 made of synthetic resin for fixing a thread, as shown in FIGS. 2 and 3. , A fixed portion 6b having two prickly protrusions 6a that bite into the inner peripheral surface 2a of the bobbin 1 and a notch 6c that is cut into a triangular shape for thread hooking are formed and exposed on the outer peripheral surface 3a of the bobbin 1. It is composed of a thread stopper 6d and a base portion 6e which connects the fixing portion 6b and the thread stopper 6d.

The base 6e of the jig 6 is formed at the axial end 1a of the bobbin 1 with the same thickness as the depth of a groove (not shown) formed in the radial direction of the bobbin 1. When the bobbin 1 is fitted into the bobbin 1 in such a manner that the end 6a of the bobbin 1 and the base 6e of the jig 6 form a continuous surface, the jig 6 moves in the axial direction of the bobbin 1. It prevents it from protruding.

Further, in this embodiment, another groove (not shown) is formed from the groove of the end portion 1a of the bobbin 1 to the annular groove 7 so that the jig 6 does not project to the outer peripheral surface 3a of the bobbin 1. The jig 6 and the outer peripheral surface 3a of the bobbin 1 are configured to be continuous with each other. Further, the thread stopper 6d of the jig 6 is formed such that the thickness is thicker in a portion closer to the base 6e and thinner in a portion closer to the tip 6f.

On the other hand, before attaching the jig 6, by rotating the bobbin 1 while pressing the roller against the outer peripheral surface 3a near the end 1a of the bobbin 1, with a certain width in the axial direction of the bobbin 1, An annular groove 7 that is slightly recessed in the circumferential direction of the bobbin 1 is formed, and the tip 6f of the jig 6 is arranged on the annular groove 7 and the annular groove 7 is used to fix this. The tip of the tool 6 slightly floats from the outer peripheral surface 3a of the bobbin 1 so that a minute gap is formed between them.

When the thread is fixed, the starting end of the thread 8 is placed in the annular groove 7 ahead of the tip 6f of the jig 6 as viewed from the end 1a of the bobbin 1 on the side where the jig 6 is attached. By introducing the thread 8 and sliding it sideways in the annular groove 7 in the direction of the end 1a of the bobbin 1, the thread 8 is caught in the notch 6c and between the jig 6 and the bottom surface 7a of the annular groove 7. It is fitted in the gap formed in the and is sandwiched between the jig 6 and the bottom surface 7a of the annular groove 7 and is gripped.

On the contrary, when unwinding the thread 8, the thread 8 is taken out from the notch 6c by the reverse operation, and the thread 8 slides sideways between the jig 6 and the bottom surface 7a of the annular groove 7. Since the yarn 8 can be easily taken out from the tip 6f of the jig 6, an excessive frictional resistance does not occur at the time of unwinding the yarn, and it is possible to prevent the single yarn from breaking into single yarns. The quality can be maintained up to the end of the yarn 8.

Next, FIGS. 7 to 9 show a jig 6 used for the bobbin 1 according to the second embodiment of the present invention. In this embodiment also, the paper tube main body 2 is formed in the same manner as in the first embodiment, and the front surface paper 3 made of a lapping paper is attached to the surface of the main body 2 to integrally form the left end of the bobbin 1. A metal thread-fastening jig 6 formed in a J shape as shown in FIGS. 7 and 8 is attached to this.

The jig 6 includes a fixing portion 6b having a protrusion 6a that bites into the inner peripheral surface 2a of the bobbin 1, a thread stopper 6d having a threaded bending portion 6g, and the fixing portion 6b and the thread. It is composed of a base portion 6e that connects the stopper portion 6d, and the base portion 6e is fitted in a groove (not shown) similar to that of the first embodiment so as not to project from the end portion 1a of the bobbin 1. The thread stopper 6d projects from the outer peripheral surface 3a of the bobbin 1 by the thickness of the jig 6.

Also in the case of this embodiment, as in the case of Embodiment 1, there is no portion where the strength of the bobbin 1 is locally reduced, and the yarn can be unwound smoothly when the yarn is unwound. At the same time, it does not deteriorate the yarn quality. Further, when the jig 6 of each of the above-mentioned embodiments is damaged and the yarn stopping function is impaired, the bobbin 1 can be reused by replacing only the jig 6.

In each of the above-described embodiments, the paper tube main body 2 having a multi-layer structure formed by spirally winding kraft paper and heat-sealing the laminated synthetic resin film is used, but the bobbin of the present invention is used. The paper tube main body 2 used for 1 is not limited to this, but other types of paper can be used, it can be wound in a flat roll, or it can be bonded with an adhesive, and various design changes can be made. . Further, the shape, structure, material, attachment method, etc. of the jig 6 may be appropriately changed depending on the yarn quality of the yarn 8 to be wound, the winding condition, and the like.

Further, in each of the above embodiments, the annular groove 7 is formed over the entire circumference of the bobbin 1, but the present invention is not limited to this, and the annular groove 7 is formed in a part of the bobbin 1 or the annular groove 7 It is possible to change the design, such as the one that does not have at all.

[0021]

[Effect of device]

 Since the bobbin for bobbin winding of the present invention does not need to form a slit by a blade as in the conventional bobbin by attaching a jig for thread stopping, when it is subjected to centrifugal force or wind force due to rotation In addition, it is possible to prevent a local decrease in the strength of the bobbin and improve the durability of the bobbin.

Further, in consideration of conditions such as the yarn quality and the yarn diameter of the wound yarn, the material of the jig and the yarn gripping gap formed between the jig and the bobbin surface are arbitrarily adjusted. By doing so, while generating the frictional resistance required for thread stopping, it is possible to prevent the occurrence of excessive frictional resistance that may cause single yarn breakage or single yarn breakage at the time of unwinding the yarn, and to ensure an appropriate thread gripping. You can have power.

[Brief description of drawings]

FIG. 1 is a perspective view of a bobbin for bobbin winding according to a first embodiment of the present invention.

FIG. 2 is a plan view of a jig used for the bobbin for bobbin winding shown in FIG.

3 is a front view of a jig used in the bobbin for bobbin winding shown in FIG. 1. FIG.

FIG. 4 is an enlarged view showing a state in which the yarn is stopped by the jig used in the bobbin for bobbin winding shown in FIG.

5 is a cross-sectional view taken along the line AA of FIG.

6 is a side view of the essential parts of the bobbin for bobbin winding shown in FIG. 1. FIG.

FIG. 7 is a plan view of a jig used for a bobbin for bobbin winding according to a second embodiment of the present invention.

8 is a plan view of the jig shown in FIG. 7. FIG.

FIG. 9 is an enlarged view of a main part of the bobbin for bobbin winding according to the second embodiment of the present invention.

FIG. 10 is a perspective view of a conventional bobbin for bobbin winding.

[Explanation of symbols]

 1 bobbin 6 jig

Claims (1)

[Scope of utility model registration request] 1. A bobbin for bobbin mounting a jig for thread fixing.