JPH0138124Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention relates to a bobbin cap that is attached to the tip of a bobbin around which a fiber yarn is wound in order to facilitate the unwinding operation of the yarn.

(Prior Art) An example of the conventional art is Japanese Utility Model Application Publication No. 184461/1983.

(Problem that the invention aims to solve) Conventionally, a disc-shaped bobbin cap made of synthetic resin was used, so the surface of the bobbin cap was easily damaged during transportation or use, and the unwound yarn was damaged. When sliding on a bobbin cap, fuzzing, uneven unwinding tension, filament breakage, etc. occur, reducing yarn quality, especially in the stretching and false-twisting processes of synthetic fiber filaments that require high yarn quality. In the processing process, there were problems such as fatal yarn defects and complicated management procedures for inspecting and repairing bobbin caps.

The object of the present invention is to provide a bobbin cap that solves the above problems.

(Means for Solving the Problems) The present invention provides a guide member assembled to a cap base for attachment to a bobbin, in which the inner parts of both open ends of the wire cross each other. The inner endless side portion is curved into a circular shape to form a ring portion for circumscribing and sliding the thread, and both open end portions outside the intersection portion are bent inward of the ring portion. The gist of the bobbin cap is a bobbin cap formed with a pair of attachment portions for attachment to the cap base.

(Function) The bobbin cap of the present invention caps a wire guide member in which a circular ring portion and a pair of attachment portions bent inwardly from this ring portion are continuously formed through an intersection. The cap base is assembled to the base, the cap base is attached to the bobbin, and the thread to be unwound is caused to circumscribe and slide through the ring portion of the guide member.

(Example) Next, an example of the present invention will be described with reference to the drawings.

In a bobbin cap G that is removably attached to the tip of a bobbin wound with synthetic fiber filament yarn, the cap base 1 to be attached to the tip of the bobbin is formed of a synthetic resin material or the like and has a substantially cylindrical shape. A hole 2a bored along the axial direction of the cylinder, and a groove 2b having a semicircular cross section carved along the surface of the cap base 1 are connected orthogonally to each other in the vicinity of both ends. A pair of left and right engaging portions 2, 2 are arranged side by side.

A guide member 3 assembled to the cap base 1 in order to define an unwinding path for the yarn to be unwound from the yarn layer of the bobbin is open at both ends, and is located inside both open ends 4, 4 of a metal wire having a circular cross section. With the parts intersecting, the inner endless side part of this intersection part 5 is curved into a circular shape to be elastically deformable.The ring part 3a is formed to be elastically deformable, and the outer side parts of both open ends 4 of the intersection part 5 are respectively A pair of mounting portions 3b, 3b are formed in a symmetrical manner by bending inward of the ring portion 3a.
The ring portion 3a is bent into an L shape in order to removably attach the guide member 3 to the cap base 1 by engaging with the ring portion 3a. The yarn unwound from the yarn layer of the bobbin is drawn out while circumscribing and sliding around the ring portion 3a.

In addition to metal wires such as stainless steel, hard wires such as inorganic wires can be used as the guide member 3, but if even more hardness is required, plated or surface-hardened metal wires can be used. You may.

Next, the operation and effects of the embodiment having the above configuration will be explained.

Now, in this example, the guide member 3 assembled to the cap base 1 has this intersection 5 with the inner parts of both open ends 4 of the metal wire having open ends intersecting each other.
The inner endless side part is curved into a circular shape to form a ring part 3a for circumscribing and sliding the thread, and the ring part 3a is elastically deformable. A pair of attachment portions 3b are formed by bending inward of the cap base 3a to be detachably attached to the cap base 1.

For this reason, the guide surface of the guide member 3 on which the yarn to be unwound comes into sliding contact is hardened to significantly reduce damage and wear on the guide surface, and the yarn that comes into sliding contact with the guide member 3 is free from fuzz, filament breakage, etc. This has the effect of suppressing defects such as deterioration of yarn quality due to defects, and fluctuations in unwinding tension resulting in uneven stretching.

In addition, since the guide member 3 is formed by bending a metal wire, the overall weight can be reduced, and the guide member 3 has a spring effect, which reduces the impact when falling or colliding with other objects. It is possible to reduce deformation and damage to the guide member 3 by absorbing it, and temporarily,
Even if the guide member 3 is damaged or deformed, only the guide member 3 can be replaced.

Furthermore, since the ring portion 3a and the attachment portion 3b are formed continuously by bending one wire rod, it is possible to simplify the production of the guide member 3 and ensure the bending accuracy of the ring portion 3a. In the case of a guide member formed by welding wire rods, it is possible to avoid problems such as deformation or deterioration of the guide member due to high heat during welding.

(Effect of the invention) In other words, in the present invention, the guide member assembled to the cap base for attachment to the bobbin has the inner parts of both open ends of the wire intersecting each other, and the inner part of the intersecting part. The endless side portion is curved into a circular shape to form a ring portion for circumscribing and sliding the yarn, and both open end portions outside the intersection portion are bent inward of the ring portion to form the cap base. By forming a pair of attachment portions for attachment to the guide member, damage and deformation of the guide member can be reduced, and the overall weight can be reduced.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; FIG. 1 is a plan view, FIG. 2 is a sectional view taken along the line -- in FIG. 1, and FIG. 3 is an exploded perspective view. 1... Cap base, 3... Guide member, 3
a...Ring part, 3b...Attachment part, 4...Release end, 5...Intersection part, G...Bobbin cap.

Claims (1)

[Scope of utility model registration request] The guide member assembled to the cap base for attachment to the bobbin has the inner parts of both open ends of the wire cross each other, and the endless part inside this intersection part curved into a circular shape. A pair of attachments forming a ring portion for circumscribing and sliding the yarn, and bending both free end portions outside the intersection portion inward of the ring portion to be attached to the cap base. A bobbin cap characterized by forming a section.