JP3133451U - Bobbin for metal wire rod - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a metal wire rod bobbin capable of reducing a contact area between a wire rod and a bobbin during longitudinal feeding while having a rigidity strength capable of resisting a bending moment acting on a flange portion.
SOLUTION: An empty cylindrical body portion (5) and a pair of donut-shaped flange portions (6) projecting radially outward from both opening end portions of the body portion, Each bobbin body (2) having a cylindrical edge (6b) at the outer peripheral edge and a substantially donut-shaped disk portion (30) having a shaft hole (3a) at the center, It has a pair of lids (3) that fit and cover the end faces of both flanges, and the outer surface of the body (5) between the two flanges (6) is for winding metal wires such as enameled thin wires. In the formed bobbin (1), a cylindrical collar part (31) is provided on the outer peripheral edge of the lid disk part (30), and the outer diameter of the collar part is formed to be slightly smaller than the inner diameter of the edge part (6b). The width (X) of the edge is made substantially half of the width (Y) of the collar.
[Selection] Figure 2

Description

  The present invention relates to improvement of a metal wire rod bobbin, and more particularly to a technique for reducing friction between a metal wire rod and a bobbin when the metal wire rod is fed out from a bobbin for metal wire rod.

  Thin metal wires, such as enameled wires, called so-called extra-fine wires, are wound around bobbins molded from relatively light resin and transported to equipment manufacturers such as motor manufacturers in consideration of transportation costs. Therefore, a thin metal wire is drawn from the bobbin and processed into a product such as a motor coil. At this time, as shown in FIG. 8, there are two types of methods of feeding the metal thin wire from the bobbin: (A) vertical feeding and (B) horizontal feeding. Longitudinal extension is common because it is easy to attach to the rotating shaft. In this vertical feeding, as shown in FIG. 8 (A), the fine metal wire is fed while contacting the outer peripheral edge of the flange portion.

  By the way, a bending moment acts on the flange portion of the bobbin in the direction of bending the flange portion outward due to the stress that deforms the bobbin main body due to the tension of the wire rod when the wire rod is wound around the bobbin. Since this bending moment has a correlation between the tension of the wire to be wound and the number of windings, when winding a metal fine wire around a bobbin, the tension and the number of windings naturally increase compared to other wires, so It has become a great power. For this reason, there is a problem that it is difficult to ensure the rigidity and strength of the flange portion in a bobbin formed from a resin having relatively low rigidity compared to other materials for weight reduction. In addition, if the rigidity of the flange is not maintained, the weight of the wire at the time of vertical feeding is added to the flange, so that a force is further applied in the direction of overturning the flange and the flange is deformed. There was a problem that the metal wire rod wound around the bobbin collapsed due to falling outside, and the wire could not be fed.

  In order to solve such problems, conventionally, as shown in FIG. 9, it has been dealt with by increasing the rib of the flange portion or by increasing the thickness of the trunk portion or the bringe portion (for example, Patent Document 1). However, in the case of dealing with such a method of raising the rib, the width of the flange portion of the flange portion becomes wide, and when the metal wire is drawn out by vertical feeding as described above, the contact between the wire and the bobbin There is a problem that the area becomes large and the wire is entangled with the bobbin and is broken. In addition, resin molded products generally have sink marks (sink marks are phenomena in which the volume decreases when the resin solidifies and defects such as dents occur on the surface; the same applies hereinafter). For this reason, when the thickness of the body portion or the flange portion is increased, the roundness and smoothness of the collar portion are impaired, which causes a disconnection.

  Therefore, the present applicant provides a lid member having a disk-shaped lid portion with an outer diameter that can cover up to a part of the inner peripheral side of the flange portion at both ends of the body portion of the bobbin body, and the strength near the flange portion of the trunk portion. Provided a bobbin with increased (see Patent Document 2). However, the winding bobbin described in Patent Document 2 is intended to effectively prevent the flange portion from falling outward, and to reduce deformation of the body portion and the like. The connecting portion near the body portion is merely supplementarily reinforced, and it is mainly the height of the rib of the flange portion that resists the bending moment acting in the direction in which the flange portion is tilted outward. For this reason, the width of the collar portion itself is not so small as compared with the prior art, and it has not been possible to solve all the above problems. In particular, failure due to friction between the wire and the bobbin when pulling out the metal wire by vertical feeding cannot be solved.For example, when the metal wire is a coated wire such as enameled wire, static electricity accumulates at the contact part due to friction, As a result, there was a problem that the wire rod was attracted to the bobbin and disconnected.

Utility Model Registration No. 30658847 JP 2004-123309 A

  Therefore, the present invention solves the conventional problems and can reduce the contact area between the wire rod and the bobbin during the longitudinal feeding while having a rigidity strength capable of resisting the bending moment acting on the flange portion as described above. It aims at providing the bobbin for metal wires.

  In order to achieve the above object, the invention of claim 1 has a hollow cylindrical body portion and a pair of donut-shaped flange portions projecting radially outward from both opening ends of the body portion. The flange portion has a bobbin main body provided with a cylindrical edge portion on the outer peripheral edge and a substantially donut-shaped disc portion provided with a shaft hole in the center, and is fitted to the bobbin main body. And a pair of lids covering the end surfaces of the two flange portions, and a bobbin in which a body outer peripheral surface between the flange portions is formed for winding a metal wire such as an enameled thin wire. A cylindrical collar is provided on the outer peripheral edge of the part, the outer diameter of the collar is formed to be slightly smaller than the inner diameter of the edge, and the width of the edge in the trunk axial direction is substantially the width of the collar. Characterized by halving.

  The invention of claim 2 is the invention according to claim 1, wherein the lid body has a cylindrical fitting portion that protrudes inward from the back surface of the disk portion and has an outer diameter that is substantially the same as the inner diameter of the body portion, The fitting portion is fitted to the inner peripheral surface of the body portion.

  The invention of claim 3 is characterized in that, in claim 1 or 2, the bobbin main body and the lid are fixed, and the lid is provided with at least one screw hole for rotational driving. To do.

  The invention of claim 4 is characterized in that, in any one of claims 1 to 3, the lid is provided with a plurality of through holes along the outer peripheral edge of the disk portion.

  According to a fifth aspect of the present invention, in any one of the first to fourth aspects, the bobbin main body is integrally formed from a resin.

  This invention is as described above, and has a hollow cylindrical body portion and a pair of donut-shaped flange portions projecting radially outward from both opening end portions of the body portion. Each of which has a bobbin main body provided with a cylindrical edge portion on the outer peripheral edge and a substantially donut-shaped disc portion provided with a shaft hole in the center, and is fitted to the bobbin main body and the both flange portions A bobbin in which a body outer peripheral surface between the flange portions is formed for winding a metal wire such as an enameled thin wire, and is formed on the outer peripheral edge of the lid disk portion. Since a cylindrical collar is provided and the outer diameter of the collar is formed to be slightly smaller than the inner diameter of the edge, the bending moment is mainly applied to the flange when a force to tilt the flange outward is applied. By placing the burden on the buttock of the lid, the width of the edge of the trunk in the axial direction is the same as the width of the buttock. Half can turn, while providing rigidity strength to counteract the outer defeat the bending moment acting on the flange portion, the contact area between the wire and the bobbin during vertical feeding can be reduced. Therefore, even if the wire is pulled out by vertical feeding, there is almost no collapse and the trouble due to the friction between the wire and the bobbin can be reduced.

  The invention according to claim 2 is the invention according to claim 1, wherein the lid protrudes inward from the back surface of the disk portion, and has a cylindrical fitting whose outer diameter is substantially the same as the inner diameter of the body portion. And the fitting part is fitted to the inner peripheral surface of the body part, that is, the flange part is slightly deformed by the force that bends the flange part upwards when it is extended vertically. Even if it is a case, since it is fitted at the body part near the center part with a small amount of deformation, the lid body is difficult to come off from the flange part, and even if the wire rod is pulled out from the bobbin by vertical feeding, it can be crushed. Can be reduced.

  The invention according to claim 3 is the invention according to claim 1 or 2, wherein the bobbin main body and the lid are fixed, and the lid is provided with at least one button hole for rotation driving. Therefore, the bobbin can be rotated using the buttonhole, and when the metal wire is wound around the bobbin, it can be easily wound.

  The invention according to claim 4 is the invention according to any one of claims 1 to 3, wherein the lid body is provided with a plurality of through holes along the outer peripheral edge of the disc portion. The weight of the lid can be reduced. In addition, the necessary information such as the date of manufacture and the part number of the metal wire can be clearly marked by marking or printing at the location visible from the through-hole of the bobbin body, and it is covered with a lid to improve its appearance, and When necessary, the information can be visually recognized even with the lid attached.

  The device according to claim 5 is the device according to any one of claims 1 to 4, wherein the bobbin body is integrally formed from a resin, so that the bobbin can be reduced in weight and easily. Since a large amount can be manufactured in a short time, the manufacturing cost can be reduced.

  An embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a perspective view showing a bobbin according to an embodiment of the present invention, FIG. 2 is an exploded perspective view showing a state in which an upper lid serving as a top plate is removed from the bobbin of FIG. 1, and FIG. It is a top view of the bobbin main body looked down from upper direction in the state which removed the upper cover body from the bobbin.
The bobbin 1 shown in the figure is composed of a bobbin main body 2 and a pair of upper and lower lid bodies 3 and 3 ′, and the lid bodies 3 and 3 ′ are fixed to the bobbin main body 2 by means such as adhesion or fusion. The bobbin main body 2 has a hollow cylindrical body portion 5 having both ends opened, and flange portions 6 and 6 'projecting from the vicinity of both ends of the body portion 5 to the outside in the radial direction at substantially right angles, and injection molding from a synthetic resin. It is integrally formed by such methods. A hollow cylindrical tube portion 5a having a short length is disposed concentrically with the body portion 5 at the center in the longitudinal direction inside the body portion 5, and a plurality of radially disposed tube portions 5a are disposed. Are supported by the body portion 5 by a support member 5b such as an arm or a donut-shaped disk. The thickness of the peripheral wall of the body portion 5 is formed such that the center in the length direction is thick and both ends are thin in consideration of deformation due to the tension of the wire wound around the bobbin (see FIG. 7). In the present embodiment, the support member 5b has a donut-shaped disk shape.

  The flange portions 6 and 6 ′ of the bobbin main body 2 are plate-like portions 6 a and 6 a ′ formed of donut-like disks connected to the body portion 5 at the inner peripheral edge, and outer surfaces from the outer peripheral edges of the plate-like portions 6 a and 6 a ′. Cylindrical edges 6b and 6b 'projecting to the side (upper in the upper flange portion 6, lower in the lower flange portion 6'), and on the outer surface side of the plate-like portions 6a and 6a ' A plurality of ribs that reinforce the bending strength (rigidity) of the portions 6 and 6 ′ are directed from the outer peripheral surfaces of both ends of the body portion 5 toward the edges 6 b and 6 b ′ along the plate surfaces of the plate-like portions 6 a and 6 a ′. Are provided radially.

  As shown in FIGS. 2 and 3, this rib is a trapezoidal plate in which the height of the outer end provided from the outer peripheral edge of the both end portions of the body portion 5 to the edge portions 6b and 6b ′ is lower than the height of the inner end. A first rib 6c, 6c ′ (not shown) of the body (see FIG. 7) and a body portion along the axial direction of the outer peripheral edge of the body portion 5; 5, second ribs 6 d and 6 d ′ made of a trapezoidal plate smaller than the first rib provided over the plate surfaces of the plate-like parts 6 a and 6 a ′, and the body part 5 and the plate-like part 6 a. , 6a ′ and third ribs 6e, 6e ′ made of a triangular plate smaller than the second rib provided at the connecting portion. In one flange portion, twelve first ribs 6c are provided by equiangularly and equally dividing the outer peripheral surface of the body portion 5, and the second ribs 6d and 6d ′ are provided as the first ribs 6c and 6c ′. The third ribs 6e and 6e ′ are provided at a regular angle and equally divided between the first ribs 6c and 6e ′ and the second ribs 6d and 6d ′. There are a total of 24 equiangular and equal parts.

FIG. 4 is a plan view showing the back surface of the lid, and FIG. 5 is a partially cut perspective view showing a state in which the lid of FIG. 4 is cut vertically along the line AA ′.
4 and 5 show a state in which the back surface that is the inner side of the lower lid 3 'is looked down from above. Since the upper lid 3 is also formed in the same shape as the lower lid 3 ′, the upper lid 3 will be mainly described with reference to the lower lid 3 ′ (not shown) (the configuration of the lower lid 3 ′ is The reference numeral is marked with '. Refer to Figs. 1 and 2 for the upper lid 3). The lid bodies 3 and 3 ′ are integrally molded from synthetic resin by injection molding or the like, and are substantially donut-shaped disk portions 30 and 30 ′ provided with shaft holes 3a and 3a ′ at the center, and the disk portions 30 and 30 ′. Cylindrical flanges 31, 31 ′ projecting from the outer peripheral edge to the inner surface side (the lower surface side in the upper lid body 3 and the upper surface side in the lower lid body 3 ′), and the inner surface from around the shaft holes 3 a, 3 a ′ The cylindrical shaft hole portions 32 and 32 'projecting to the side and supporting the rotating shaft of the bobbin, and the outer diameter is substantially the same as the inner diameter of the inner peripheral surface of the body portion 5, and the disk portions 30 and 30' Cylindrical fitting portions 33 and 33 ′ protruding inward from the back surface.

  In the disk portions 30 and 30 ', rotational driving buttonholes 30a and 30a' used when winding the wire around the bobbin are smaller than inner diameters of fitting portions 33 and 33 'described later according to the driving device. Four (on one disk part) are provided on concentric circles with a diameter. However, it is only necessary to provide one for each of the upper and lower lids, and as shown in the figure, it is more preferable to provide a plurality so as to be adapted to various types of driving devices. The disk portions 30 and 30 ′ are provided with a plurality of through holes 30 b and 30 b ′ having an arc long hole shape along the outer peripheral edge thereof. Reinforcing cylindrical ribs 30c and 30c ′ are provided around the perforated holes 30a and 30a ′, and radial ribs 30d and 30d ′ made of flat strips are provided on the shaft hole portion 32, Six equiangular radii are provided from 32 ′ to the fitting portions 33, 33 ′. In addition, ring-shaped ribs 30e and 30e ′ coupled to these ribs are formed in a ring shape having a radius that passes through the centers of the hole 30a and 30a ′. The cylindrical ribs 30c and 30c ′ and the radial ribs are formed. The ribs 30e and 30d ′ and the annular ribs 30e and 30e ′ have the same height. With this configuration, when the lid bodies 3 and 3 ′ are molded from the synthetic resin, the resin solution is easily spread evenly.

  Further, the flange portions 31 and 31 ′ have an outer diameter slightly smaller than the inner diameter of the edge portion 6b (see FIGS. 1, 2 and 7), and the width Y thereof is approximately double the width X of the edge portion 6b. (See FIG. 2). Further, the flange portions 31 and 31 ′ are provided with notches 31a and 31a ′ at positions corresponding to the first ribs 6c and 6c ′, and the lid bodies 3 and 3 ′ are fitted to the bobbin main body 2. When this is done, the flange portions 31, 31 ′ and the plate-like portions 6a, 6a ′ of the flange portions 6, 6 ′ are in good contact with the first ribs 6c, 6c ′ without being obstructed (see FIG. 7). At the same time, the lids 3 and 3 ′ are configured not to rotate separately from the bobbin main body 2. The shaft holes 32 and 32 'are provided with engagement steps 32a and 32a' for engaging with a shaft (not shown) of the rotating shaft of the bobbin 1 so as not to come off. The joint portions 33 and 33 ′ are formed such that the proximal end side is thick and the inner distal end side is thin.

6 is a plan view showing a state where the bobbin of FIG. 1 is looked down from above, and FIG. 7 shows a state where the bobbin of FIG. 1 with the upper lid removed is cut vertically along the line BB shown in FIG. It is a BB sectional view.
The bobbin 1 is configured as described above. As shown in the drawing, the bobbin 31, 31 'is provided on the outer peripheral edge of the lid 3, 3', and the outer diameter of the hooks 31, 31 'is set to the edge. The parts 6b and 6b ′ are formed to have a diameter slightly smaller than the inner diameter, and the fitting parts 33 and 33 ′ are fitted to the body part 5 of the bobbin main body 2. Therefore, the flange parts 6 and 6 ′ have a force to be tilted outward. Even in the case of working, the flange portion 6 where the wire rod and the bobbin are brought into contact with each other by causing the bending moment to be mainly borne by the lid bodies 3 and 3 ′ via the flange portions 31 and 31 ′. , 6 'can be made to have a width X of about half or less of the width of the conventional edge required for design as an allowable strength, that is, the width X of the edges 6b, 6b' can be changed to a bending moment. Can be made approximately half the width Y of the flanges 31 and 31 ′ that mainly bear the load, and it can be used against an outward bending moment acting on the flanges 6 and 6 ′. It is possible to reduce the contact area between the wire rod and the bobbin during the longitudinal feeding while having a rigid strength that can be resisted. For this reason, even if the wire wound around the bobbin 1 is pulled out by vertical feeding, there is almost no collapse, and problems due to friction between the wire and the bobbin can be reduced. Further, the lids 3 and 3 ′ are fitted inside the edges 6b and 6b ′ of the flanges 6 and 6 ′, and the lids 3 and 3 ′ that mainly bear the bending moment are increased in thickness, so that the flanges By reducing the thickness of 6,6 ′, even if the roundness and smoothness of the lid 3,3 ′ are lost due to the sink, Since smoothness can be ensured, it is possible to prevent an error from the design dimension due to the sink of the lids 3 and 3 'from causing a disconnection of the wire rod when vertically fed. Even when the flanges 6 and 6 'are bent outwardly by a bending force and are slightly deformed during vertical extension, they are fitted by the body 5 near the center with a small amount of deformation. The bodies 3 and 3 ′ are not easily detached from the bobbin main body 2. In addition, the trunk portion 5 is thick at the center in the length direction and is thin at both ends, and the fitting portions 33 and 33 ′ are thick at the proximal end side and thin at the inner distal end side. When fitted, both can be fitted more reliably.

  As shown in FIG. 6, the lid bodies 3, 3 ′ are provided with a plurality of through holes 30 b, 30 b ′ along the outer peripheral edge of the disk portions 30, 30 ′. 'Weight can be reduced. In addition, necessary information such as the date of manufacture and the part number of the metal wire can be clearly marked on the outer surface of the flange portions 6 and 6 ′ visible from the through holes 30b and 30b ′ by printing or printing. Covering with 3 'improves the appearance, and when necessary, the information can be visually recognized even with the lids 3 and 3' attached.

  As shown in FIG. 7, the inner diameters of the shaft hole portions 32 and 32 ′ and the inner diameter of the tube portion 5 a are not the same, and the tube portion 5 a is formed in a large shape and is configured as a separate body. Even when the roundness is deteriorated due to drying shrinkage such as sink marks near the center in the length direction of the relatively thick body portion 5, the accuracy does not affect when it is mounted on the rotating shaft. Further, since a plurality of buttonholes 30a and 30a ′ are provided on concentric circles having a diameter smaller than the inner diameter of the fitting portions 33 and 33 ′, the wire rod is wound around the bobbin 1 so as to be adapted to various types of driving devices. Or unwind.

  The above-described embodiment is merely a preferred example, and the detailed configuration can be arbitrarily modified and changed within the scope of the claims of the utility model registration. In particular, the lid is not limited to one molded from a synthetic resin, and may be made of metal, for example. Even in such a case, it is clear that the above-described effect is achieved.

It is a perspective view which shows the bobbin which concerns on one embodiment of this invention. It is a disassembled perspective view which shows the state which removed the upper cover body from the bobbin same as the above. It is a top view which shows the bobbin main body which concerns on embodiment same as the above. It is a top view which shows the back surface of the cover body which concerns on embodiment same as the above. FIG. 5 is a partially cut perspective view showing a state in which the lid of FIG. 4 is cut along the line A-A ′. It is a top view of the bobbin of FIG. It is the BB sectional drawing which cut | disconnected the bobbin same as the above by the BB line of FIG. It is explanatory drawing explaining the (A) vertical delivery and (B) horizontal delivery of the wire rod of the conventional bobbin. It is sectional drawing explaining the conventional bobbin.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Bobbin 2 Bobbin main body 3, 3 'Lid | bodies 30, 30' Disc part 30a, 30a 'Perforated hole 30b, 30b' Through-hole 31, 31 'ridge part 6, 6' flange part 6b, 6b 'edge X edge Width Y buttock width

Claims (5)

A hollow cylindrical body portion and a pair of donut-shaped flange portions projecting radially outward from both opening ends of the body portion, each of the flange portions having a cylindrical edge on the outer periphery A bobbin main body provided with a portion, and a pair of lids having a substantially donut-shaped disk portion provided with a shaft hole in the center and covering the end surfaces of both flange portions by fitting to the bobbin main body. In the bobbin formed for winding a metal wire material such as an enamel thin wire, the outer peripheral surface of the body portion between the two flange portions,
A cylindrical collar is provided on the outer peripheral edge of the lid disc part, the outer diameter of the collar is formed to be slightly smaller than the inner diameter of the edge, and the width of the edge in the trunk axial direction is the collar. A bobbin for a metal wire characterized by being approximately half the width of the wire.   The lid body protrudes inward from the back surface of the disk portion and has a cylindrical fitting portion whose outer diameter is substantially the same as the inner diameter of the barrel portion. The fitting portion is formed on the inner peripheral surface of the barrel portion. The bobbin for metal wires according to claim 1, which is fitted.   The bobbin for a metal wire rod according to claim 1 or 2, wherein the bobbin main body and the lid are fixed, and the lid is provided with at least one screw hole for rotation driving.   The bobbin for a metal wire rod according to any one of claims 1 to 3, wherein the lid is provided with a plurality of through holes along the outer peripheral edge of the disk portion.   The said bobbin main body is a bobbin for metal wires in any one of Claim 1 thru | or 4 currently integrally molded from resin.

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