JPH0442288Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) This invention is attached to a bobbin to guide the yarn being unwound from the wound layer of the bobbin and to facilitate the unwinding operation of the yarn. The present invention relates to a bobbin cap, particularly a bobbin cap applied to synthetic fiber filaments.

(Prior Art) In order to smoothly unwind synthetic fiber filaments from a winding layer by suppressing fuzz and fluctuations in unwinding tension of synthetic fiber filaments set in a drawing twisting machine, a drawing false twisting machine, etc. A disk-shaped bobbin cap made of a resin material is attached to the bobbin by press-fitting a leaf spring-shaped attachment member attached to the back surface of the bobbin cap into the bobbin.

(Problem to be solved by the invention) In the case of the above-mentioned bobbin cap, the guide surface on the outer periphery is easily damaged due to the abrasion of the synthetic fiber filament or contact with mechanical parts during handling or attachment/detachment work. There were some problems, such as fuzzing, uneven stretching, and filament breakage when the synthetic fiber filament slid against a damaged guide surface.

Furthermore, when the bobbin cap is attached to and removed from the bobbin, the attachment member of the bobbin cap is fitted into the bobbin against its elastic force and pulled out from the bobbin against the pressure contact force, so that the elastic force of the attachment member is reduced. There was a problem that the attachment of the bobbin cap to the bobbin was likely to become unstable due to the restrictions.

The present invention aims to solve the above problems.

(Means for Solving the Problems) The bobbin cap of the present invention includes a pair of operation parts that are arranged oppositely so that they can be compressed and can be elastically bent and deformed, and a bobbin cap that follows the bending deformation behavior of this operation part. A pair of holding parts of the cap base are arranged alternately in series for elastic bending and deformation, and when the operating parts and the holding parts are released, a bobbin is attached to the holding parts. The cap base is provided with an inscribed portion that is pressed against the inner circumferential surface of the bobbin and separates from the inner circumferential surface of the bobbin when the both operating portions are compressed and the both pressing portions are bent and deformed. At least one guide member having a suction portion curved in an arc shape and a pair of attachment portions connected to both ends of the suction portion is installed near both ends of one of the suction portions or near the two ends of the suction portion. The cap base has a structure in which the welded portions are attached via the respective attachment portions in a state in which the welded portions are arranged in an annular manner around the cap base by overlapping and intersecting the vicinity of one end of the welded portions.

(Function) A cap base in which a pair of operation parts and a pair of holding parts, each formed to be elastically bendable and deformable, are alternately arranged, and a guide member having an arc-shaped weld part is attached. The both operating parts are squeezed to elastically bend and deform the both holding parts in accordance with the elastic bending and deforming movements of the operating parts, and the inscribed portions formed in both the holding parts are connected to the bobbin. The cap base is attached to and detached from the bobbin by contacting and separating from the inner peripheral surface. Further, the hard surface of the welded portion is provided around the cap base in an annular manner via an intersection where the end portions of the welded portion overlap and intersect.
It guides the thread that is unwound from the winding layer of the bobbin.

(Effects of the Invention) Since the present invention is constructed as described above, the operation of attaching and detaching the bobbin cap to the bobbin is simplified, and the attachment state of the bobbin cap to the bobbin is strengthened and stabilized.

In addition, by arranging the welded portion of the guide member having a hard surface in a circular ring around the cap base with a gap in between, the weight of the entire bobbin cap is reduced and a spring effect is imparted to the welded portion. At the same time, the wear resistance and damage resistance of the outer peripheral edge of the bobbin cap are increased, and the durability of the entire bobbin cap is improved.

(Embodiment) Next, a first embodiment of the present invention will be described with reference to FIGS.

The bobbin cap C, which is removably attached to the tip of the bobbin B, is made of synthetic material in order to guide the yarn being unwound from the wound yarn layer of the bobbin B and to facilitate the unwinding operation of the yarn. A cap base 1 is formed of a resin material so as to be elastically bendable and can be fitted into and removed from the bobbin B, and two guide members 2, 2 are formed of an elastic metal wire having a hard surface and are in sliding contact with the yarn to be unwound. It is equipped with

The cap base 1 is formed in a substantially quadrilateral frame shape by alternately connecting a pair of operating parts 3, 3 arranged opposite each other so as to be capable of being clamped and operated, and a pair of restraining parts 4, 4 arranged opposite each other so as to undergo elastic bending deformation in response to the elastic bending deformation of the two operating parts 3.

Both operation parts 3 are each formed in a band shape, and have a shape that is curved inward in a concave arc shape in the thickness direction so that it is relatively easy to bend and deform, and both operation parts 3 can be squeezed with the grip force of fingers. When the actuator is pressed, the actuator is bent and deformed so that its radius of curvature is reduced, and when both the actuators 3 are released, they are elastically restored to their original shape.

Both holding parts 4 are connected between both operating parts 3, respectively.
are each curved outward in a convex arc shape in order to elastically bend and deform the curvature radius so that the radius of curvature is reduced when both operating parts 3 are squeezed, and both holding parts 3 have the same shape as the operating part 3. An inner piece 4a has a width band shape and is curved in the thickness direction, and an outer piece 4b has a band shape and is curved in the width direction to define the fitting end of the cap base 1 into the bobbin B. Each of them is connected in a T-shape in cross section, and a roughly cylindrical protrusion 5 is formed at each joint between both operating parts 3 and both pressing parts 4, and a hole is provided at the rear of each protrusion 5. 5a is recessed.

Both pressing parts 4 have higher bending resistance than both operating parts 3, and have a larger elastic force than both operating parts 3, and in this example, when both operating parts 3 are squeezed, The amount of bending deformation at both ends of the stop portion 4 is set to be approximately 1/10 of the amount of bending deformation at the center portion of the operating portion 3 so that the elastic force of the stop portion 4 is enhanced.

Attachment grooves 6 are recessed in both ends of the outer surface of the outer pieces 4b of both retaining parts 4, and mounting grooves 6 are provided in the convex parts 5 of both retaining parts 4, which communicate with the inner ends of the attachment grooves 6. Holes 7 are provided through each of them.

At both ends of the outer surface of the inner piece 4a of both holding parts 4, there are slightly inscribed parts 8 each having a top surface 8a arranged on the same circle centered on the central axis A of the cap base 1. Each inscribed part 8 has a circumscribed circle circumscribing each top surface 8a of each inscribed part 8 with a diameter slightly larger than the inner diameter of the bobbin B when both operating parts 3 and both holding parts 4 are released. When both operating parts 3 are compressed to bend and deform both holding parts 4, each inscribed part 8 is displaced inward to form a circumscribed circle circumscribing the top surface 8a of each inscribed part 8. The diameter is set to be slightly smaller than the inner diameter of the skein bobbin B. When both operating parts 3 are pressed and each inscribed part 8 is displaced inwardly, each inscribed part 8 is separated from the inner circumferential surface B1 of bobbin B, and in this state, the cap base is attached to bobbin B. It can be inserted into and removed from both operation parts 3.
When the cap base 1 is inserted into the bobbin B in a state where the cap base 1 is compressed, and both operating parts 3 are released, each internal contact part 8 comes into pressure contact with the inner circumferential surface B1 of the bobbin B, and the cap base 1 is pressed against the inner peripheral surface B1 of the bobbin B. fixed at the tip. In addition, in this example, each inscribed portion 8 is connected to the inner circumferential surface B1 of the bobbin B.
The pressing force applied to the cap base 1 is set so that the bobbin can be hung and carried or handled while the cap base 1 is being gripped.

A thread hooking piece 10 formed in the shape of an O-ring made of an elastic material is attached to a truncated conical protrusion 9 slightly protruding from the center of the outer surface of the outer piece 4b of both holding parts 4.
1, and the terminal yarn of the wound layer of the bobbin B can be inserted into the gap between the thread hooking piece 10 and the protrusion 9 and gripped.

Both guide members 2 are formed by applying hard chrome plating to the surface of a spring wire material, and have a smooth hard surface, and have a welding part 12 curved in a semicircle for sliding the thread, and a guide member. 2 to the cap base 1 in a dual-supported manner.
a pair of mounting portions 13 connected to both ends of the
13 respectively. A curved part 13 curved into an arc with a radius of curvature smaller than the radius of curvature of the weft part 12 is provided on the side of the weft part 12 of both attachment parts 13.
a and 13a are respectively formed, and the base end portions of both mounting portions 13 are bent into an L shape for insertion into the mounting groove 6 and the mounting hole 7, respectively. Both mounting portions 13 of the guide member 2 are connected to each other by cap nuts 15 screwed into the tips of each mounting portion 13, with the ends of the mounting portions 13 inserted into the mounting groove 6 and the mounting hole 7, respectively. They are each removably fastened to one end of the holding part 4. Both guide members 2 are provided in an annular shape around the cap base with the center axis A as the center, with both the weft portions 12 facing each other so as to form a circular space, and near both sides of the both weft portions 12. are supported at both ends by the cap base 1 via the respective mounting portions 13 in a state where they are overlapped and intersected in the front and rear directions. Both intersecting parts 16 where both end portions of both suction parts 12 overlap and intersect, respectively, are arranged outside the center of both pressing parts 4 of cap box 1, and Both outer surfaces are superimposed so that their projection lines coincide.

Around the cap base 1, a guide surface 17 is formed in which the front projection lines of the outer surfaces of both the welding parts 12 are continuous in a circular shape centered on the central axis A, and two semicircles are connected. , gaps 18 and 18 are formed between both the holding parts 4 of the cap base 1 and the welding part 12 of the guide member 2, respectively, to allow bending deformation of the guide member 2. Gaps 19, 19 are formed between the operating portion 3 and both the welding portions 12, respectively, for inserting a hand during the pinching operation of the operating portions 3.

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

In this example, a pair of operating parts 3 are arranged oppositely to be operated by pinching and are formed to be elastically bendable, and a pair of operating parts 3 are arranged oppositely to be able to be elastically bent and deformed in accordance with the bending deformation behavior of the operating parts 3. A pair of holding parts 4 are arranged alternately in both holding parts 4 of the cap base 1, and when both operating parts 3 and both holding parts 4 are released, the holding parts 4 are pressed against the inner peripheral surface B1 of the bobbin B. Moreover, when both the operating parts 3 are compressed and both the holding parts 4 are bent and deformed, an inscribed part 8 is formed which is separated from the inner circumferential surface B1 of the bobbin B. Two guide members 2 having a curved suction part 12 and a pair of attachment parts 13 connected to both ends of the suction part 12 are overlapped and crossed near one end of both the suction parts. The welding portion 12 is attached to the cap base 1 via each attachment portion 13 in a circular manner around the central axis A.

Therefore, by pinching both operating parts 3 of the cap base 1, the bobbin cap C can be easily attached to and removed from the bobbin B, and the bobbin cap C can be easily attached to the bobbin B. This has the effect of simplifying the work of attaching and detaching.

In addition, since the elastic force of both holding parts 4 is enhanced compared to that of both operating parts 3, even if both operating parts 3 are operated with a small operating force, the elastic force of both holding parts 4 is large. A pressing force can be applied, and when the bobbin cap C is attached to the bobbin B, the pressure contact force of each internal contact part 8 can be strengthened, and the attachment state of the bobbin cap C to the bobbin B can be strengthened and stabilized. This has the effect of simplifying the handling of the bobbin B to which the bobbin cap C is attached.

Furthermore, since the circular guide surface 17 is formed by connecting the thread welding portions 12 of both guide members 2 in an annular manner, the bobbin cap A guide function for smoothly guiding the yarn can be provided to the outer peripheral edge of C, and if one of the guide members 2 is damaged, the damaged guide member 2 can be replaced to maintain the overall guide function. effective.

Furthermore, since both the welding parts 12 having a hard surface are provided around the outer peripheral edge of the bobbin cap C, wear resistance can be locally imparted to the outer peripheral edge where wear resistance is required. Despite using the cap base 1, which lacks wear resistance, the bobbin cap C is effectively strengthened only at the outer periphery, compared to when the entire bobbin cap is made of a wear-resistant metal material. This makes it possible to reduce the overall weight and material costs.

In addition, since both the welding parts 12 are provided around the cap base 1 with gaps 18 and 19 in between,
It is possible to reduce the overall weight and improve the operability when performing the pinching operation of both the operation parts 3, and also to
A spring effect can be imparted to the splicing part 12, and when a pressing action is applied to the splicing part 12, bending deformation of the splicing part 12 is allowed, for example, when the bobbin cap C falls or collides with mechanical parts, etc. In some cases, this impact can be effectively absorbed by the spring effect of the welding section 12 to prevent damage to the collision section.

Next, a description will be given of a second embodiment of the present invention shown in FIG. 6. In this embodiment, the cap base 1A of the bobbin cap C is constructed in the same manner as in the first embodiment, but the cap base 1A has one guide. Member 2A is attached.

The guide member 2A is formed with a weft portion 12A that is circularly curved over a 360° range, and attachment portions 13A that are connected to both ends of the weft portion 12A. is provided in an annular shape around the cap base 1A, the vicinity of both ends of the welding portion 12A overlap and intersect, and the tips of both attachment portions 13A are press-fitted into both attachment holes 7A of the holding portion 4A. Both attachment parts 13A are attached to the cap base 1A in a state in which they are respectively fixed to both ends of the one-side holding part 4A.

The functions and effects of the second embodiment are explained in the first embodiment.
Since it is almost the same as the embodiment, its explanation will be omitted.

[Brief explanation of the drawing]

1 to 4 show a first embodiment of the present invention, in which FIG. 1 is a rear view of the bobbin cap, FIG. 2 is a front view, and FIG. 3 is a partially cutaway side view, and FIG. Figure 4 is an enlarged sectional view taken along the line X1-X1 in Figure 1.
FIG. 5 is an enlarged sectional view taken along the line X2-X2, and FIG. 6 is a rear view showing the bobbin cap of the second embodiment. 1, 1A... Cap base, 2, 2A... Guide member, 3, 3A... Operation section, 4, 4A... Holding section, 8, 8A... Inscribed section, 12, 12A... Junction section , 13, 13A...Mounting part, B...Bobbin,
C...Bobbin cap.

Claims (1)

[Scope of utility model registration request] A pair of operating parts are arranged oppositely to be able to be operated by pinching and are formed to be elastically bendable, and a pair of pressers are arranged oppositely to enable elastic bending deformation to follow the bending deformation behavior of the operating parts. The holding parts of the cap base, which are alternately arranged in series, are arranged so that when the operating parts and the holding parts are released, they come into pressure contact with the inner circumferential surface of the bobbin and pinch the operating parts. The cap base has an inscribed part which is separated from the inner circumferential surface of the bobbin when both the holding parts are bent and deformed, and the cap base has a suction part curved in an arc shape, and the suction part. At least one guide member having a pair of attachment portions connected to both ends of the yarn is overlapped and crossed near both ends of one of the spliced portions or near one end of two of the spliced portions, and A bobbin cap, characterized in that the bobbin cap is attached via each of the attachment portions in a state in which the cap base is provided in an annular manner around the cap base.