JP6516427B2 - Clamping ring, magnetic accessory using the same, and method of manufacturing the same - Google Patents

Description

  The present invention relates to a clamp ring, a magnetic accessory using the same, and a method of manufacturing the same.

The core wire of an electric wire, a rope, a wire, a string, etc. may be made into the braided wire or the braided wire which twisted a plurality of strands etc. in order to improve strength and for design. Such a stranded wire and a braided wire may be easily unraveled at the twisted end portion or the reticulated end portion, and may be unwound as a whole from the end portion unraveling. Therefore, various means for preventing the unwinding of the end have been proposed.
As a means for preventing the melting of the end, for example, a method of fastening the end with a cord or a wire or a method of twisting enamel wire strands and adhering an adhesive tape along a longitudinal direction (Patent Document 1) can be mentioned . In addition, for example, a collective wire (Patent Document 2) in which an adhesive tape is wound in a spiral shape, and a fixing tool for prestressed concrete for fixing a tension wire rod made of a stranded wire Patent Document 3), and PC strand with a twist loosening stopper (patent document 4) in which single filaments are integrated by welding can be mentioned.

  In addition to the above, magnetic accessories (also referred to as magnetic treatment tools) and the like that can alleviate symptoms such as stiff shoulders and low back pain have been proposed as those using stranded wires or braided wires as described above. For example, Patent Document 5 describes a magnetic accessory provided with an accessory main body formed by twisting or braiding a plurality of flexible magnetic elongated members.

JP-A-6-119818 Japanese Utility Model Application Publication No. 51-17767 Japanese Examined Patent Publication 6-25457 Japanese Utility Model 7-11196 Utility model registration No. 3160521 gazette

  By the way, the magnetic accessory is worn, and weight reduction is also required. Therefore, the fixing tool described in Patent Document 3 can not be adopted. It is also technically impossible to adopt the welding described in Patent Document 4 for a magnetic accessory having a resin or rubber coating layer.

On the other hand, in the method of fastening the end portion of the accessory body with a cord, a wire or the like, the fastening state between the products is difficult to be uniform, and the working time is long and there is a problem in productivity. Moreover, the accessory main body fastened with a wire may be damaged by overtightening of the flexible magnetic elongated body, which may cause cutting of the flexible magnetic elongated body in some cases.
The adhesive tape is more suitable than the above-mentioned means as a fastening method of the accessory body. However, in the case of the magnetic accessory, a connector is usually attached to each end of the accessory body. In this case, there is a problem that the adhesive tape attached to the surface of the accessory main body can not obtain sufficient mountability (attachment strength) with the connector. In order to enhance the adhesion, the adhesion area of the adhesive tape may be reduced, but this will impair the tightening property.

  Further, regardless of the anti-unwinding means at the end, in order to easily attach the connector to the accessory main body, the above-mentioned means or the like may have to be removed, which impairs productivity.

According to the present invention, the end portion of an elongated bundle formed by twisting or meshing a plurality of flexible magnetic elongated bodies in a fixed tightening state without damaging the flexible magnetic elongated bodies. It is an object of the present invention to provide a clamp which can be tightened with good productivity.
Moreover, this invention makes it a subject to provide the magnetic accessory using the said clamp, and its manufacturing method.

  In the case of a ring formed by winding a metal wire in a coil shape, the present inventors twist a plurality of flexible magnetic elongated bodies having a core material containing a rubber magnet and a coating layer covering the core material. Alternatively, the end portion of the mesh bundle is tightened with good productivity in a fixed state, and further, the long bundle is used as the accessory body in the manufacture of the magnetic accessory while the clamp ring is not removed. However, it has been found that a problem arises that the ring end damages the flexible magnetic elongated body and becomes easy to break. As a result of continuing investigations toward solving this new problem, when the end of the metal wire forming the clamping ring is disposed outward of the clamping ring, the above-mentioned uniformity of clamping force and productivity are not lost. It has been found that the flexible magnetic elongated body can be prevented from being damaged.

The object of the present invention is achieved by the following means.
(1) A clamping ring for clamping an end of a stranded or braided wire,
Ri Do from a spirally wound metal wire, wherein when the axis position on both end faces of the metal wire rod Ri tightening outward near the center diameter of the ring, and tightening the strand or braided wire A clamping ring , the end faces of which do not come in contact with the stranded or braided wire .
(2) Both ends of the metal wire, respectively, the clamping ring according to formed by a straight line machining or bending (1).
(3) An end portion of an elongated bundle formed by twisting or meshing a plurality of flexible magnetic elongated bodies having a core material containing a rubber magnet and a coating layer covering the core material, The magnetic accessory which clamps with the clamp ring as described in 1) or (2).
(4) have a connector for connecting said end portions to each said end portion, said clamping ring being tightened each said end portion is inserted into the axial hole of said connector, and (3) Magnetic accessory described.
(5) The magnetic accessory according to (3) or (4), wherein the core material containing the rubber magnet and the coating layer covering the core material are formed of silicone rubber.
(6) A plurality of flexible magnetic elongated bodies having a core material containing a rubber magnet and a coating layer covering the core material are twisted or meshed together to form a long bundle. ,
After the diameter of the tightening ring according to the above (1) or (2) is expanded and inserted into the end portion of the elongated bundle, the expansion of the tightening ring is released to tighten the end portion. Method.

  In the present invention, the flexible magnetic elongated body means an elongated body which is flexible and can have magnetism. This flexible magnetic elongated body includes an elongated body which can express magnetism by magnetization in addition to the elongated body having magnetism in advance.

The clamping ring of the present invention can be attached to the end of the elongated bundle by enlarging its diameter. As a result, the end of the elongated bundle can be tightened with good productivity in a fixed state, and moreover, damage to the elongated body at the time of mounting can be prevented. In addition, the axis on the end face of the metal wire is positioned more outward than the center diameter of the tightening ring, and not only when the tightening ring is attached but also after attachment (in use), especially the elongated body by the end face of the metal wire It can prevent damage to the bundle.
Further, the magnetic accessory of the present invention can clamp the end of the elongated bundle in a fixed state by using the clamp ring of the present invention, and the flexible magnetic elongated body is not easily damaged. It has excellent durability.
Furthermore, according to the method of manufacturing the magnetic accessory of the present invention, by using the tightening ring of the present invention, the end of the elongated bundle can be tightened in a fixed state, and moreover, at the end of the elongated bundle, A connector can be provided with the fastener of the present invention attached. As a result, it is possible to manufacture a magnetic accessory having a constant quality and excellent durability with high productivity.

FIG. 1 is a plan view showing a preferred embodiment of the fastener of the present invention. FIG. 2 is a front view showing a preferred embodiment of the fastener of the present invention. FIG. 3 is a plan view showing another preferred embodiment of the fastener of the present invention. FIG. 4 is a view for explaining a state in which the clamp of the present invention is attached to the end of the flexible magnetic elongated bundle. FIG. 5 is a plan view showing a preferred embodiment of the magnetic accessory of the present invention. FIG. 6 is a plan view showing another preferred embodiment of the magnetic accessory of the present invention. FIG. 7 is a plan view showing still another preferred embodiment of the magnetic accessory of the present invention. FIG. 8 is a view for explaining a preferred example of the method of manufacturing a magnetic accessory according to the present invention.

  The clamping ring of the present invention is made of a coiled metal wire, and the axial position on the end face of the metal wire is outside of the central diameter of the clamping ring. The clamping ring of the present invention can prevent the end of the stranded wire or the braided wire from unwinding, and can also be referred to as an end unfolding prevention ring, a restriction ring, a binding ring or the like.

The clamping ring of the present invention will be specifically described with reference to the drawings, but the present invention is not limited thereto.
The preferred fastener 1A of the present invention is comprised of a metal wire wound in a spiral shape (coil shape) as shown in FIGS. 1 and 2.

In the present invention, the total number of turns, center diameter D, height and the like when winding the metal wire is not particularly limited, and is appropriately set according to the application, the diameter of the long bundle, the tightening property and the like, and is not particularly limited.
The total number of turns may be, for example, 1 to 10, preferably 2 to 4, and 2.5 in the clamping ring 1A. A central diameter defined by 1⁄2 of the sum of the inner diameter and the outer diameter of the spirally wound metal wire (also referred to as the winding portion 2) (the diameter of the circle formed by the axis of the metal wire to be the winding 2 And D) may be smaller than the diameter of the elongated bundle to be tightened (usually, the diameter of the circumscribed circle circumscribing the cross-sectional contour shape of the elongated bundle). It is preferable that the diameter is 0.3 to 1.7 mm smaller than the diameter of the long bundle, and more preferably 0.7 to 1.3 mm smaller in terms of the tightening property and the mounting property. Specifically, the central diameter D is, for example, 2.5 to 3.7 mm, and preferably 2.8 to 3.4 mm when used for a magnetic accessory described later. The height is determined by the outer diameter of the metal wire and the total number of turns.

  The winding part 2 may be right-handed or left-handed as long as it has a spiral shape. Further, the metal wires wound spirally may be in close contact with each other (dense winding), may have a space (rough winding), and may be a mixture of closely winding and rough winding. Therefore, in the present invention, it is not necessary to strictly distinguish between close winding and rough winding. The tightening prevention ring 1A is tightly wound as a whole.

As shown in FIG. 1 and FIG. 2, the clamping ring 1A has a center diameter D of the winding portion 2 at the intersection Ce (axial position on the end surface of the metal wire) of each end of the metal wire and the axis of the metal wire. It is located more outward than it is. Thus, the end 3 </ b> A of the metal wire projects outward from the winding portion 2. With this configuration, the flexible magnetic elongated body can be prevented from being damaged when the end of the elongated bundle is tightened and also after the tightening.
In the present invention, the end shape of the metal wire is not particularly limited as long as the position of the intersection point Ce is outside the center diameter D, and it is linear or curved outward (substantially C-shaped, substantially) V-shaped and the like), bent (substantially U-shaped and the like), bent-shaped (approximately L-shaped and the like), and the like. When used for a magnetic accessory or the like to be described later, the end shape is preferably linear or bent (substantially L-shaped etc.).

In the tightening ring of the present invention, the amount of protrusion of the intersection point Ce from the center diameter D is not particularly limited, but in the case of using the magnetic accessory described later, it is possible to insert in the mounting hole of the connector. It is preferable in point. The amount of protrusion is, for example, 0.1 to 1 mm, preferably 0.15 to 0.5 mm. The protrusion amount means the distance between the intersection point Ce and the imaginary straight line and the point at which the axis of the winding portion 2 intersects the imaginary line connecting the intersection point Ce and the center of the winding portion 2.
In the clamping ring 1A, as shown in FIG. 1, each of the end portions 3A extends linearly by linear processing and protrudes outward of the winding portion 2, and each of the intersections Ce is from the center diameter D of the winding portion 2 Also, the projection amount is 0.2 mm.

  Since the tightening ring 1A has a total number of turns of 2.5, both ends 3A are located on the opposite side of the winding part 2 at a central angle of 180 °, but in the present invention, the central angles of both ends Is not limited to 180 °.

The metal for forming the metal wire is not particularly limited, but stainless steel (SUS steel) or the like is preferable in terms of tightening property, corrosion resistance, workability and the like. Specifically as SUS steel, SUS301, NAS301H, SUS302, SUS304, SUS316 etc. are mentioned.
A piano wire (SWP-A) etc. are mentioned other than SUS steel.

The dimension and the cross-sectional shape of the metal wire are appropriately set according to the application, the tightening property and the like of the tightening ring of the present invention, and is not particularly limited. The metal wire, in particular its end, preferably has a constant dimension, particularly preferably an outer diameter. Here, "dimensions are constant" does not mean constant in a strict sense, but it means that it includes dimensional differences that are acceptable at the product specification level.
Examples of the cross-sectional shape of the metal wire include a circle, an ellipse, and a polygon. Moreover, 0.1-1 mm is mentioned, for example, and, as for the cross-sectional diameter of a metal wire, 0.2-0.5 mm is preferable when using for a magnetic accessory especially. In addition, when cross-sectional shape is not circular, let the diameter of the circumscribed circle of cross-sectional shape be a cross-sectional diameter.

A state where the long bundle is tightened using the tightening tool 1A will be described.
The tightening tool 1A can be attached to the end of the elongated bundle with high productivity by expanding the diameter of the winding portion 2 as described later, and the tightening state of the end is constant. In this way, when the clamp 1A is attached to the end of the elongated bundle, as shown in FIG. 4, the clamp 1A clamps the end of the elongated bundle from the circumferential direction to the central direction, The twist or mesh of the end can be fixed to prevent the unwinding. At this time, since the clamp 1A is tightened by the winding portion 2, the tightening state in the circumferential direction becomes constant. Further, as long as the fasteners 1A are formed of the same material and in the same size and shape, the fastening state is constant even if different fasteners are used. Therefore, the fastening state between products can be kept constant.
In the present invention, “fixed state is fixed” and “fixed state is fixed” means that when the tightening tool is attached to the end of the elongated bundle, the outer diameter of the tightening tool in the circumferential direction is almost the same. It means that it is constant and tightened. Here, that the outer diameter of the fastener is substantially constant means that the “difference R in the outer diameter of the fastener” in the examples described later is within 0.2 mm, preferably within 0.1 mm.

Further, at the end 3A of the fastening tool 1A, the axial position Ce on the end face of the metal wire is positioned more outward than the center diameter D, and the end face is long even when the end of the long bundle is tightened. Contact with the Thereby, it is possible to prevent the elongated body from being damaged at the time of attachment and after attachment of the tightening ring 1A.
Moreover, the amount of protrusion of the end face is relatively small as described above. For example, when using the long bundle 12 having the clamp 1A mounted thereon as a magnetic accessory etc., providing the connector with the clamp ring 1A attached. Can increase the productivity of magnetic accessories.

  Another preferable fastening tool 1B of the present invention is the same as the fastening ring 1A except that the shape of the end 3B is different as shown in FIG. 3A, and exhibits the same effect as the fastening tool 1A. That is, each of both end portions 3B of the tightening ring 1B is bent and curved and formed into a substantially C shape (bow shape). As a result, the axial position Ce on the both end faces 3B is positioned outward of the center diameter D of the tightening ring 1B. The amount of protrusion of the axial position Ce on the end face 3B is 0.5 mm in all cases.

  Another preferable fastening tool 1C of the present invention is the same as the fastening ring 1A except that the shape of the end 3C is different as shown in FIG. 3 (b), and exhibits the same effect as the fastening tool 1A. . That is, each of both end portions 3C of the tightening ring 1C is bent and formed into a substantially U shape. As a result, the axial position Ce on the both end faces 3C is positioned outward of the center diameter D of the tightening ring 1C. The amount of protrusion of the axial position Ce on the end face 3C is 0.4 mm in all cases.

  Yet another preferred fastening tool 1D of the present invention is the same as the fastening ring 1A except that the shape of the end 3D is different as shown in FIG. 3C, and the same effect as the fastening tool 1A is obtained. Play. That is, each of both end portions 3D of the tightening ring 1D is formed by bending so as to have a so-called "hemming shape". As a result, the axial positions Ce on the both end surfaces are located outward of the center diameter D of the tightening ring 1D. The amount of protrusion of the axial position Ce on the end face is 0.2 mm in all cases.

The clamp ring of the present invention can be manufactured by spirally winding a metal wire and processing an end.
The method of winding the metal wire in a spiral shape is not particularly limited, and a method of winding around a core material etc. may be mentioned. For example, it can be manufactured in the same manner as a coil spring. At this time, the interval of the metal wire wound around the core material or the like is adjusted by close winding, rough winding or the like.
The metal wire is wound to a predetermined total number of turns, or the wound metal wire is cut to a predetermined total number of turns, and the end is processed or adjusted as necessary. The processing or adjustment of the end portion is not particularly limited as long as it is a processing method or an adjustment method capable of making the axial position on the end surface outward from the center diameter. For example, straight processing or bending processing (including folding bending processing) may be mentioned, and specifically, it is as described above.

  The stranded wire or braided wire to which the clamp ring of the present invention is attached is a twisted core wire, a wire, a wire such as a wire, a strand such as a cord, or a twisted magnetic flexible body such as a magnetic accessory. It will not be specifically limited if it is a wire, the said strand, or the braided wire in which the said flexible magnetic elongate body is meshed. As such a stranded wire or braided wire, a stranded material or braided wire of a flexible magnetic elongated body having a core material containing a rubber magnet described later and a coating layer for coating the core material is preferable.

  The stranded wire is not particularly limited as long as a plurality of strands or a flexible magnetic long body is twisted together. For example, one end is fixed and the other end is rotated around the axis line in a state in which a plurality of strands or flexible magnetic elongated bodies are closely in parallel in the axial direction, that is, in a state where they are aligned. A wire or a stranded wire formed by focusing on a flexible magnetic elongated body in a twisted state can be mentioned. In the present invention, all the strands or flexible magnetic elongated body may be rotated as described above to apply twist, and a part of the plurality of strands or flexible magnetic elongated body may be twisted. It may be rotated as described above to apply twist.

  The twisting direction of the stranded wire may be either the S direction or the Z direction, and is appropriately selected. Further, in the stranded wire, the twist angle, the unit length (for example, the number of twists per 1 m), the twist pitch, and the like are not particularly limited as long as the object of the present invention can be achieved. Specifically, the twist angle is preferably 10 to 70 degrees, the twist number is preferably 30 to 600 pieces / m, and the twist pitch is preferably 3 to 50 mm.

  The stranded wire may be, for example, a three-stranded wire formed by twisting two strands or a flexible magnetic elongated body, a three-stranded wire or a three-piece flexible magnetic elongated body. Four strands (also called four strikes), six strands, or flexible four strands (also referred to as four strikes), four strands or a flexible magnetic long body are twisted together. And six stranded wires (also referred to as six strikes) formed by twisting a magnetic magnetic elongated body.

  The braided wire is not particularly limited as long as a plurality of strands or a flexible magnetic elongated body are braided into a mesh. For example, a braided wire composed of two strands or a flexible magnetic elongated body, a braid composed of a braided wire of three strands or a flexible magnetic elongated body. A braided line of structure is mentioned.

The wire or flexible magnetic elongated body may be any wire or flexible magnetic elongated body extending along its axis.
The cross-sectional shape perpendicular to the axis of the wire or the flexible magnetic elongated body is not particularly limited, and examples thereof include a circle, an ellipse, and the like. The dimensions of the wire or flexible magnetic elongated body, for example, axial length, outer peripheral length, circular diameter, elliptical short axis length and long axis length, etc. are appropriately determined according to the application etc. It is set.

  The clamp ring according to the present invention can, for example, be used in the manufacture of a magnetic accessory, and can clamp the end of an elongated bundle in a fixed state with high productivity with high flexibility. It can prevent the damage of the long body.

Next, the magnetic accessory of the present invention will be described.
The magnetic accessory of the present invention is an end of an elongated bundle formed by twisting or meshing a plurality of flexible magnetic elongated bodies each having a core material containing a rubber magnet and a coating layer covering the core material. As an accessory body, which is a stranded wire or a braided wire clamped by the clamp ring of the present invention. Also, the magnetic accessory of the present invention preferably has a connector at the end of the long bundle.

  The flexible magnetic elongated body contains a rubber magnet and magnetic powder, and includes an elongated core material extending in one direction and a coating layer covering the core material. It also has a constant outer diameter. The flexible magnetic elongated body may or may not be magnetized.

The core material is preferably formed of a so-called "rubber magnet" containing rubber and magnetic powder.
The rubber is not particularly limited and, for example, silicone rubber, urethane rubber, fluororubber, natural rubber, nitrile rubber, ethylene propylene rubber (including ethylene propylene diene rubber), styrene butadiene rubber, butadiene rubber, butadiene rubber, isoprene rubber, acrylic rubber And chloroprene rubber, butyl rubber, epichlorohydrin rubber and the like. Among these, silicone rubber is preferable.

The magnetic powder may be anything that generates a magnetic force when magnetized, and examples thereof include powders such as rare earth metal magnetic materials. The rare earth metal magnetic material is not particularly limited, and, for example, those described in paragraph [0021] of JP 2012-115617 A can be used.
The magnetic material is usually contained in the form of powder, granules or the like, and the particle size thereof is preferably adjusted to, for example, 0.5 to 30 μm. When the particle diameter is in this range, large unevenness is hardly formed on the outer peripheral surface of the core member 2, and high adhesiveness with the outer layer 3A can be secured. This particle size is a value obtained by measuring ₂ g of a sample under the measurement conditions of a dispersion pressure of 2.6 bar and a dispersion medium N ₂ according to a laser diffraction particle size distribution analyzer method.

  The magnetic powder contains a mass ratio of rubber and magnetic powder (rubber: magnetic powder) to the total mass of rubber and magnetic powder in a ratio of 2.3: 7.7 to 0.9: 9.1. Is preferred. The magnetic powder has a mass ratio (rubber: magnetic powder) of 1.8: 8.2 to 1.1: 8 in that the surface magnetic flux density and flexibility of the magnetic accessory 1 can be compatible at a high level. 9 is preferred.

  The core material may contain various additives which are usually added to the rubber composition in addition to the rubber and the magnetic powder, as long as the surface magnetic flux density is not reduced. As such additives, for example, dispersants, foaming agents, vulcanizing agents, antiaging agents, antioxidants, fillers, pigments, colorants, processing aids, plasticizers, flame retardants, release agents A mold agent etc. are mentioned.

The covering layer is a tubular elongated body covering the entire outer peripheral surface of the core material. A cross section perpendicular to the axial direction is substantially annular. The covering layer has a thickness of, for example, 0.1 to 0.5 mm.
The coating layer contains rubber. The rubber is not particularly limited, and is similar to the rubber contained in the core material. When the coating layer contains the same kind of rubber as the rubber contained in the core material, in particular, the same rubber, the adhesion between the coating layer and the core material becomes good and it becomes difficult to peel off, and the durability of the magnetic accessory improves. In that it is preferable. In particular, it is preferable that the core material and the covering layer both contain silicone rubber, in particular, the same silicone rubber, because the adhesion becomes strong and it is difficult to peel off, and the durability of the magnetic accessory is improved. The coating layer may contain the above additive as well as the core material.

  The flexible magnetic elongated body is set to an appropriate cross-sectional shape and size according to the outer diameter of the elongated bundle or the mode of the stranded wire or the braided wire. For example, the cross-sectional shape and the diameter of the flexible magnetic elongated body include a circular cross-section having a diameter of 1 to 8 mm.

  The elongated bundle is a stranded wire or a braided wire by twisting or braiding a plurality of flexible magnetic elongated bodies. The stranded wire or braided wire is as described above.

The connector is a connector for connecting both ends of the magnetic accessory with a male connector provided at one end and a female connector provided at the other end of the long bundle. Also, a connector provided at one end and having a pair of sandwiching pieces facing each other sandwiches other than the other end and connects the one end and the sandwiching part. Good. Such a connector is formed into, for example, a tube, an ellipsoid, a sphere or the like, or a holding piece or the like is formed on these. As such a female connector, for example, a tubular body or the like having an axial hole which penetrates in the axial direction and into which the elongated bundle is inserted can be mentioned. As the tubular male connector, for example, the above-mentioned axial hole There is a tubular body or the like, which has at its tip end a protrusion that is insertably inserted in and removable from and has an axial hole into which the elongated bundle is inserted. Further, as another connector, for example, a connector including a tubular connector having an annular body and an annular connector for coupling the annular body of the tubular coupler is cited. Be In the present invention, the coupler is not limited to the above-described specific coupler, and a conventional coupler can be adopted without particular limitation.
The connector is preferably made of resin, rubber or metal, and a metal connector is preferable in that the connector is unlikely to be damaged even when in contact with the clamp ring.
The method of attaching the coupler to the end of the elongated bundle is not particularly limited. For example, known adhesive materials and attachment methods such as a method of bonding using an adhesive or the like can be appropriately selected and used.

  The magnetic accessory of the present invention is not particularly limited, but preferably has a surface magnetic flux density of 35 milliTesla (mT) or more, and particularly preferably 35 to 200 milliTesla (mT). The surface magnetic flux density can be adjusted by changing the content of the magnetic powder, the mixing ratio of the atoms constituting the magnetic powder, the thickness of the coating layer, and the like. The surface magnetic flux density can be measured, for example, using a gauss meter (GM4002 manufactured by Electronic Magnetic Industry Co., Ltd.) and a transverse probe (T-402 manufactured by Electronic Magnetic Industry Co., Ltd.).

  The magnetic accessory of the present invention is preferably used as an accessory such as a magnetic necklace, a magnetic bracelet, a magnetic supporter or the like.

Preferred magnetic accessories of the present invention will be described with reference to the drawings, but the present invention is not limited thereto.
A preferred magnetic accessory 11A of the present invention is, as shown in FIG. 5, an elongated bundle 12A consisting of two stranded wires obtained by twisting two flexible magnetic elongated members 12a and 12b together; And a connector 13 mounted at both ends clamped by a clamp (not shown).
In FIG. 5, the illustration of the end of the elongated bundle 12A to which the fasteners are attached is omitted, but is the same as that shown in FIG.
The connector 13 includes a tubular connector 13a attached to each end of the elongated bundle 12, an annular body 13c provided on the tubular connector 13a, and an annular connector 13b for coupling the annular bodies 13c. The two end portions of the elongated bundle 12A are connected by connecting the two annular bodies 13c in a chain shape with the annular connection tool 13b.

Another preferable magnetic accessory 11B of the present invention is, as shown in FIG. 6, an elongated bundle 12B comprising three stranded wires in which three flexible magnetic elongated members 12a to 12c are twisted together; A connector 14 mounted at both ends clamped with the inventive fastener (not shown). The tightening state of the elongated bundle 12B by the clamp of the present invention is the same as that shown in FIG.
The connector 14 includes a male connector 14a attached to one end of the elongated bundle 12B and a female connector 14b attached to the other end of the elongated bundle 12B. By inserting the protrusion of the mold connector 14a into the female connector 14b, the both ends of the elongated bundle 12B are connected. The male coupler 14a and the female coupler 14b may employ conventional couplers as described above.

  Another preferred magnetic accessory 11C of the present invention, as shown in FIG. 7, comprises an elongated bundle 12C consisting of a triple braided wire in which three flexible elongated magnetic members 12a to 12c are braided. The magnetic accessory 11A is the same as the magnetic accessory 11A except for the provision.

  The magnetic accessory of the present invention can tighten the end portion of the elongated bundle in a fixed state, and the flexible magnetic elongated body is not easily damaged, and the durability is excellent.

  The magnetic accessory of the present invention is formed by twisting or meshing a plurality of flexible magnetic elongated bodies to form an elongated bundle, and then expanding the diameter of the clamp ring of the present invention to form an elongated bundle After being inserted into the end portion, the diameter of the tightening ring is released and the end portion is tightened (the manufacturing method of the present invention).

The flexible magnetic elongated body used in the production method of the present invention is as described above, and can be produced by extrusion molding, for example, two-layer extrusion molding or the like using a rubber magnet, rubber or the like.
The elongated bundle can be formed by twisting or meshing a plurality of flexible magnetic elongated members as described above.

  In the manufacturing method of the present invention, the clamping ring is attached to the end of the formed elongated bundle. The tightening ring can be installed in the tightening state shown in FIG. 4 by expanding it to a diameter larger than the outer diameter of the elongated bundle and then inserting it near the end of the elongated bundle to release the enlarged diameter. .

  According to the manufacturing method of the present invention, after the diameter of the tightening ring is expanded and inserted into the end of the elongated bundle, the diameter increase of the tightening ring is released to clamp the end of the elongated bundle. If it is, it will not be limited in particular.

In the manufacturing method of the present invention, the tightening step of tightening the end of the elongated bundle with the tightening ring is preferably the following series of mounting steps.
If desired, the elongated bundle 12 is cut into a predetermined length. That is, as shown in FIGS. 8 (a) and 8 (b), both sides of the portion to be cut of the elongated bundle 12 are held between the two chuck jigs 21 and 22 at intervals. Next, the elongated bundle 12 exposed at the intermediate portion between the two sets of chuck jigs 21 and 22 is cut by a cutting tool (not shown) such as scissors (see FIG. 8C).
In the present invention, the chuck jigs 21 and 22 may be any known ones as long as they can hold (chuck) the long bundle 12 respectively. The chuck jigs 21 and 22 have a recess 21 a or 22 a for restricting the displacement of the long bundle 12 in order to secure a fixed state. When the elongated bundle 12 can be cut as desired, the chuck jig may not be used.

Next, the clamping ring 1 is attached to the end of the cut elongated bundle 12.
First, after cutting the long bundle 12 as described above, one chuck jig is retracted. In this example, the chuck jig 21 positioned above is retracted.
Then, as shown in FIG. 8D, the clamping ring 1 is extrapolated to the end of the elongated bundle 12 fixed by the lower chuck jig 22. That is, as shown in FIG. 8D, the ring insertion jig 23 is extrapolated to the end of the elongated bundle 12 which protrudes from the chuck jig 22. At this time, it is preferable that the end face of the ring insertion jig 23 and the chuck jig 22 be separated, and the elongated bundle 12 be exposed.
As the ring insertion jig 23, a rod-like body or a tube whose outer diameter gradually increases is preferably used. The ring insertion jig 23 has a hole or an axial hole (not shown) into which the end of the elongated bundle 12 can be inserted, and the maximum outer diameter is larger than the outer diameter of the elongated bundle 12 and the minimum The outer diameter is smaller than the inner diameter of the clamping ring 1.

Then, as shown in FIG. 8D, the clamp ring 1 is inserted into the ring insertion jig 23. As shown in FIG. 8E, the tightening ring 1 is moved by the ring pushing jig 24 along the ring inserting jig 23 to the long bundle 12 side. At this time, the tightening ring 1 is pushed into the elongated bundle 12 while expanding its diameter. When the tightening ring 1 is pushed out from the end of the ring insertion jig 23, the tightening ring 1 is attached to the exposed portion of the elongated bundle 12, and the enlarged diameter of the tightening ring 1 is released and the diameter is reduced. Tighten the part.
In the present invention, the ring pushing jig 24 may be any member that can move the tightening ring 1 along the ring insertion jig 23. The ring pushing jig 24 shown in FIG. 8 (d) has a contact portion that abuts against the clamping ring 1 and presses it. In the present invention, the movement of the clamp ring can also be performed manually.

  Thereafter, as shown in FIGS. 8 (f) and 8 (g), the ring insertion jig 23 and the ring pushing jig 24 are retracted to release the clamping of the chuck jig 22 and the end portion is a clamping ring. A long bundle 12 clamped at 1 is obtained.

  In the manufacturing method of the present invention, mounting of the clamp ring 1 can be performed by expanding the diameter of the clamp ring 1 and releasing the clamp ring 1 in this manner, and damaging the flexible magnetic elongated body with high productivity. Instead, the end of the elongated bundle 12 can be tightened in a fixed state.

  In the manufacturing method of the present invention, the flexible magnetic elongated body is magnetized if necessary. In the manufacturing method of the present invention, in the case of using a flexible magnetic elongated body which is magnetized in advance as the flexible magnetic elongated body, the flexible magnetic elongated body is subjected to magnetization treatment at the time of preparation. On the other hand, when using a non-magnetized flexible magnetic elongated body as the flexible magnetic elongated body, before (twisted wire or braided wire) or after attaching the clamping ring to the elongated body bundle 12 At any time after attachment of the connector to the end portion of the elongated bundle 12, the magnetizing process is performed. A well-known process can be employ | adopted suitably for a magnetization process.

  In the manufacturing method of the present invention, the connector 13 or 14 is attached to the end of the elongated bundle 12 as necessary. At this time, as described above, the connector 13 or 14 can be provided with the clamping ring 1 attached. The attachment method of the coupler 13 or 14 can employ | adopt suitably the well-known attachment methods, such as adhesion | attachment.

  According to the method of manufacturing the magnetic accessory of the present invention, the end of the elongated bundle 12 can be clamped in a fixed state, and the clamp of the present invention is attached to the end of the elongated bundle 12 A coupler 13 or 14 can be provided. Therefore, it is possible to manufacture a magnetic accessory with constant quality and excellent durability with high productivity.

  The molded body and the magnetic accessory according to the present invention are not limited to the above examples, and various modifications can be made as long as the object of the present invention can be achieved.

Example 1
In Example 1, the magnetic accessory 11B shown in FIG. 6 was manufactured using the clamping ring 1A shown in FIG.

<Production of Clamping Ring 1A>
First, a clamp ring 1A was produced as follows.
As the metal wire, a metal wire made of SUS302 and having a wire diameter of φ0.2 mm was used. The metal wire was wound 2.5 times with a coiling machine so as to have a central diameter of 3.3 mm, and a clamping ring 1A was produced in which both ends were formed in a linear shape with a protruding amount of 0.2 mm.

<Manufacture of magnetic accessory 11B>
The magnetic accessory 11B was manufactured as follows.
The silicone rubber and the rare earth metal magnetic material (SmFeN) were kneaded using a kneader mixer at a ratio of mass ratio (rubber: magnetic powder) of 1.6: 8.4. A platinum catalyst and an organohydrogenpolysiloxane were blended in the obtained kneaded product, and the mixture was kneaded with a mixing roll to prepare an addition reaction type silicone rubber composition for a core material.
In addition, a platinum-based catalyst, an organohydrogenpolysiloxane and a pigment were mixed with silicone rubber and kneaded with a mixing roll to prepare an addition reaction type silicone rubber composition for a coating material.

Subsequently, the addition reaction type silicone rubber composition for the core material is put into the core material forming extruder, and the addition reaction type silicone rubber composition for the covering material is put into the coating material forming extruder, respectively, using a two-layer crosshead. Two-layer coextrusion was performed. The extruded body was heated and vulcanized through a normal pressure hot air vulcanization furnace to produce a flexible magnetic elongated body having an outer diameter of 2 mm and a coating layer of 0.25 mm.
Next, three flexible magnetic long bodies were wound 30 m each on a plastic bobbin, and three were prepared. Each bobbin is set on each of three rotary shaft stands of a three-strand twisting machine, and the number of twists is 200 with a twisting direction of S at a table rotation number of 180 rotations and a pull-up feed rotation number of 40 rotations. An elongated bundle 12 of three-twist diameter φ4 mm (the difference from the center diameter D of the tightening ring 1A is 0.7 mm) was produced.

The magnetic treatment tool 1A was manufactured using the manufactured elongated bundle 12 according to the manufacturing method of the present invention including the series of mounting steps.
The manufactured three-twisted long bundle 12 is held between two sets of chuck jigs 21 and 22 so as to have a length of 500 mm, and a portion exposed between the two sets of chuck jigs 21 and 22 is cut. (See FIG. 8A to FIG. 8C). The upper chuck jig 21 was retracted. The ring insertion jig 23 was extrapolated to the end of the elongated bundle 12 while being held between the lower chuck jigs 22, and the clamping ring 1A was extrapolated to the ring insertion jig 23 (see FIG. 8 (d)). . Next, the clamping ring 1A was pushed in along the ring insertion jig 23 with the ring pushing jig 24 while expanding the diameter (see FIG. 8 (e)). Furthermore, the tightening ring 1A was pushed out from the end of the ring insertion jig 23 to release the diameter expansion and reduce the diameter, and the end of the elongated bundle 12 was tightened with the tightening ring 1A. In this manner, the clamping rings 1A were attached to both ends of the elongated bundle 12. A metal connector 14 was attached with an adhesive to both ends of the clamp ring 1A as it was mounted, to manufacture a magnetic accessory 11B.

(Example 2)
In Example 1, the clamp ring 1A is a clamp ring 1B (wire diameter φ 0.2 mm, clamp ring central diameter φ 3.1 mm, 2.5 turns, both ends are substantially C-shaped (bowed) with a projection amount of 0.5 mm) A magnetic accessory was manufactured in the same manner as in Example 1 except that it was changed to

(Example 3)
In Example 1, the clamp ring 1A is formed into a clamp ring 1C (wire diameter φ 0.2 mm, clamp ring center diameter φ 3.3 mm, 2.5 turns, both ends are formed in a substantially U shape with a protrusion amount of 0.4 mm) A magnetic accessory was manufactured in the same manner as in Example 1 except for the change.

(Example 4)
In Example 1, the clamp ring 1A is formed into a clamp ring 1D (wire diameter φ 0.2 mm, clamp ring center diameter φ 3.3 mm, 2.5 turns, bending at both ends, so-called "heming shape", A magnetic accessory was manufactured in the same manner as in Example 1 except that the protrusion amount was changed to 0.2 mm).

(Comparative example 1)
First, a magnetic accessory in the same manner as in Example 1 except that a clamping ring (the end of which was not straightened or bent) was used in which the axial line on the end face of the metal wire was positioned on the center diameter of the clamping ring. Manufactured.

(Comparative example 2)
A magnetic accessory was manufactured in the same manner as in Example 1 except that the end of the flexible magnetic elongated body was fastened with a wire. The wire used was made of brass and had a wire diameter of φ0.2 mm. In the fastening method, the wire is triple-wound and the wire ends are not twisted.

(Comparative example 3)
A magnetic accessory was manufactured in the same manner as in Example 1 except that the end of the flexible magnetic elongated body was fastened with a cord. The cord used is a cotton thread (tako thread) having a diameter of about φ 0.5 mm. In the fastening method, the cotton yarn is triple-wound and the cotton yarn ends are connected.

(Comparative example 4)
A magnetic accessory was manufactured in the same manner as in Example 1 except that the end of the flexible magnetic elongated body was fastened with an adhesive tape. The adhesive tape used the tape piece which cut the polyester film tape (The polyester film adhesive tape for antistatics, Teraoka Mfg. Co., Ltd. make) of width 20 mm in width 5 mm and length about 40 mm. The method of fastening was triple winding with a tape piece.

(Evaluation of damage to flexible magnetic long objects)
(1) At the time of mounting After mounting each manufactured clamp to a bundle of elongated members, the end of the flexible magnetic elongated member was visually observed to confirm the presence or absence of a scratch. Evaluation is as follows. The results are shown in Table 1.
The incidence rate (%) of flaws was evaluated when clamps were attached to two long sides (two places in total) on each of ten long bundle produced as described above.
(2) After Use In the same manner as in each of the above-described examples, ten magnetic accessories (one having no scratch on the flexible magnetic elongated member when the clamp was attached) were manufactured. After wearing each magnetic accessory for one week and having them live as usual, the presence or absence of a scratch was confirmed in the same manner as in the above (1) wearing. The presence or absence of the wound was confirmed by disassembling the magnetic accessory connector after use. Evaluation is as follows. The results are shown in Table 1. However, Comparative Example 2 and Comparative Example 3 in which the fastener was removed when attaching the connector were not evaluated.
The incidence rate (%) of scratches after use was evaluated at two locations (total twenty locations) on both sides (ten locations in total) of the ten elongated bundle bundles that were disassembled.

(Tightening condition)
After attaching the fastener to the elongated bundle, the clamped state (uniformity) of the end of the flexible magnetic elongated body was evaluated as follows. The results are shown in Table 1.
After attaching the fastener to the long bundle, five samples of the outer diameter of the fastener were measured, and the difference R between the maximum value and the minimum value was determined. The smaller the difference R, the better the uniformity of the tightening state. In addition, the outer diameter of the clamp was measured using a measurement microscope (manufactured by Nikon, MM-200).

(productivity)
The productivity of the manufactured magnetic accessories was evaluated according to the following criteria. The results are shown in Table 1.
(1) Time Required for Tightening Operation The time required for the tightening operation was measured when the fastener was attached to two places (total 20 places) on both sides of each of the ten long bundle produced as described above.
(2) Occurrence rate of removal of the clamp ring and clamp (wires, cords, adhesive tape) when mounting the connector: 2 sides of each of the 10 long bundle produced as described above (total 20 When trying to insert the connector with the fastener attached to the location), the number of cases where the fastener was removed (incidence rate (%)) was counted (calculated) because it did not enter the end of the elongated bundle 12 .

(Connecting tool attachment strength (adhesive strength))
In each of the manufactured magnetic accessories, the attachment strength (initial strength, adhesive strength) between the connector and the end of the elongated bundle was measured as follows. The results are shown in Table 1.
From each of the magnetic therapeutic devices manufactured in each example, a test piece of about 150 mm in length including a connector was collected (the cut end was processed so as not to be melted). The connector-side end of the test piece fixed the connector to the chuck jig of the tensile tester, and the long bundle-side end held the long bundle by the chuck jig of the tensile tester. In this state, the test piece was pulled under the conditions of a tensile speed of 100 mm / min, and the maximum load (N) was measured when the bundle of elongated bodies broke or when the connector was pulled out of the bundle of elongated bodies. For measurement, a tensile tester (manufactured by A & D Co., Ltd.) was used. However, the magnetic treatment devices of Comparative Examples 2 and 3 in which the fastener had to be removed were not measured.

(Connection tool attachment durability strength)
In the manufactured magnetic accessory, the attachment durability strength between the connector and the end of the elongated bundle was evaluated as follows. The results are shown in Table 1.
From each of the magnetic therapeutic devices manufactured in each example, a test piece of about 150 mm in length including a connector was collected (the cut end was processed so as not to be melted). The connector of the test piece was fixed with a jig or the like, held at a position 10 cm away from the connector, stretched about 5 cm, and returned to the original state. After repeating this continuously 500 times, the connector attachment strength was measured by the same method as the above-mentioned "adhesive strength". However, the magnetic treatment devices of Comparative Examples 2 and 3 in which the fastener had to be removed were not measured.

The following can be understood from the results of Table 1.
That is, in the damage evaluation (1) of the flexible magnetic elongated body, no scratch was generated in Examples 1 to 4 and Comparative Example 4, but the incidence of scratches was high in Comparative Examples 1 to 3. Moreover, about damage evaluation (2) of a flexible magnetic elongate body, although generation | occurrence | production of the damage | wound did not occur in Examples 1-4 and Comparative Example 4, the incidence rate of the damage was high in Comparative Example 1.
As for the tightening state, in Examples 1 to 4 and Comparative Example 1, the difference R was within 0.10 mm, and the variation was small with small differences, but in Comparative Examples 2 to 4, the difference R was large.
About productivity (1), although working hours were comparatively short in Examples 1-4 and comparative example 1, working hours were long in comparative examples 2-4. Moreover, about productivity (2), although the fastening tool was not removed in Examples 1-4 and Comparative Example 1 and Comparative Example 4, the connecting tool can be attached in Comparative Examples 2 and 3 if it is not removed. It was not.
Regarding the adhesive strength, the mounting strength was high in Examples 1 to 4, but the mounting strength was low in Comparative Examples 1 and 4.
With regard to the connector attachment durability strength, in Examples 1 to 4 the attachment strength was slightly reduced compared to the first time, but in Comparative Examples 1 and 4 the attachment strength was significantly lower than the first time.

  As described above, according to the clamp of the present invention, the end of the flexible magnetic elongated body can be tightened with good productivity in a fixed state, and moreover, the flexible magnetic elongated body can be used both after mounting and after use Was able to prevent damage. In addition, the magnetic accessory of the present invention can tighten the end of the flexible magnetic elongated body in a fixed state and has excellent durability. Furthermore, the method for manufacturing a magnetic accessory of the present invention can manufacture a magnetic accessory having a constant quality and excellent durability with high productivity. In addition, the magnetic treatment tool is also excellent in the adhesion between the elongated bundle and the flexible magnetic elongated body.

On the other hand, in Comparative Example 1 in which a clamp not subjected to end treatment was used, the flexible magnetic elongated body was often damaged when the clamp ring was attached, and the attachment strength and the durability strength were low. .
In Comparative Examples 2 and 3 in which a wire or a cord is used, the tightening state varies at the time of wearing, which may damage the flexible magnetic elongated body, and the attachment strength and the durability strength are low, and the productivity is low. The
In Comparative Example 4 using the adhesive tape, the flexible magnetic elongated body was not damaged at the time of mounting, but the mounting strength and the durability strength were extremely low.

1, 1A, 1B, 1C, 1D Tightening ring 2 Winding portion 3A, 3B, 3C, 3D End portion D Center diameter Ce Axis on end face 11A, 11B, 11C Magnetic jewelery 12, 12A, 12B, 12C Long bundle 12a , 12b, 12c flexible magnetic elongated members 13, 14 couplers 13a cylindrical couplers 13b annular couplers 13c annular members 14a male couplers 14b female couplers 21 and 22 chuck jigs 21a and 22a concave portion 23 ring Insertion jig 24 Ring pushing jig

Claims (6)

A clamping ring for clamping the ends of stranded or braided wire,
Ri Do from a spirally wound metal wire, wherein when the axis position on both end faces of the metal wire rod Ri tightening outward near the center diameter of the ring, and tightening the strand or braided wire A clamping ring , the end faces of which do not come in contact with the stranded or braided wire . Wherein both ends of the metal wires, respectively, the clamping ring according to claim 1, formed by a straight line machining or bending.   An end portion of an elongated bundle formed by twisting or meshing a plurality of flexible magnetic elongated bodies each having a core material containing a rubber magnet and a coating layer covering the core material, or A magnetic accessory which is tightened by the tightening ring described in 2. Have a connector for connecting said end portions to each said end portion, said clamping ring being tightened each said end portion is inserted into the axial hole of said connector, magnetic Claim 3 Accessories.   The magnetic accessory according to claim 3 or 4, wherein the core material containing the rubber magnet and the coating layer covering the core material are formed of silicone rubber. A plurality of flexible magnetic elongated bodies having a core material containing a rubber magnet and a coating layer covering the core material are twisted or meshed together to form an elongated bundle;
The diameter of the tightening ring according to claim 1 is expanded and inserted into the end of the elongated bundle, and then the diameter of the tightening ring is released to tighten the end.
Method of manufacturing a magnetic accessory

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