Wire member welding fixture

Abstract

To provide a wire member welding fixture capable of improving the accuracy of the joining position between a wire member such as a wire and a ring-shaped member and capable of performing stable welding.SOLUTION: Provided is a fixture 1 for welding distal portions of a plurality of wire members 120 to a ring-shaped member 110, including: a plurality of protrusions 11 that are insertable into the lumen of the ring-shaped member 110; a protrusion holder 60 for holding the plurality of protrusions 11; and a wire member support portion 20 disposed opposite the protrusion holder 60 and extending in a direction away from the protrusion holder 60; wherein the protrusions 11 protrude toward the wire member support portion 20 side of the protrusion holder 60, and the protrusion holder 60 is displaceable in a direction perpendicular to the protrusion direction of the protrusions 11.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a jig for joining distal portions of a plurality of linear members to a ring-shaped member. [Background technology]

[0002] A catheter usually comprises a tube for insertion into a body cavity such as a blood vessel, digestive tract, or urinary tract, and a handle provided on the proximal side of the tube. Some catheters are known that are configured so that the distal end of the tube can be bent by operating the handle on the hand side.

[0003] As such a catheter, there is one in which a wire is arranged in the inner cavity of a tube, the distal end of the wire is fixed to a ring-shaped member arranged at the distal end of the tube, and the proximal end of the wire is connected to a handle, and the distal end of the tube can be bent by operating the handle. For example, in a catheter in which two wires are arranged in the inner cavity of a tube, the distal end of the tube can be bent to one side by pulling one of the two wires proximally by operating the handle, and the distal end of the tube can be bent to the other side by pulling the other wire.

[0004] For example, Patent Document 1 describes a manufacturing jig for wire-attached rings, which has mounting grooves on both side surfaces and a mounting protrusion at the distal end for removably attaching a ring member, wherein the distal ends of the first wire and the second wire can be respectively attached to the mounting grooves in a manner that allows them to move axially and be removably attached, and the ring member can be removably attached to the mounting protrusion of the jig so that the distal ends of the first wire and the second wire protruding from the distal end of the jig contact the inner surface of the through hole of the ring member and protrude through the through hole. Patent Document 2 also describes a joint ring structure in which a plurality of joint rings having a substantially cylindrical portion are arranged adjacent to each other along the axial direction and extend from the base end to the tip, in which each of the plurality of joint rings has a pair of base end crests formed to protrude from the base end surface of the cylindrical portion and arranged in positions substantially symmetrical to each other with respect to the axis, and a pair of tip end crests formed to protrude from the tip end surface of the cylindrical portion and arranged in positions corresponding to the base end crests, and the tip end engages with the most distal joint ring and a plurality of wires are provided whose base ends reach the base end of the joint ring structure. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2015-163128 A [Patent Document 2] JP 2020-137898 A Summary of the Invention [Problem to be solved by the invention]

[0006] In the mechanism for bending the distal end of the catheter, the ring-shaped member and the wire need to be firmly and precisely joined. In order to make the catheter less invasive, there is a demand for a smaller outer diameter of the catheter shaft, but a tube with a small outer diameter also has a small inner diameter, and the space in the tube in which the ring-shaped member and the wire are placed is also small. In order to increase the joining strength between the ring-shaped member and the wire, it is required to suppress floating of the wire and unevenness in joining that occur when joining the wire to the ring-shaped member, and to achieve stable joining.

[0007] In the configurations described in Patent Documents 1 and 2, the joining and the joining position between the ring-shaped member and the wire are prone to variation, and there is room for improvement in order to achieve a stable joining.

[0008] The present invention has been made in consideration of the above-mentioned circumstances, and its object is to provide a linear member joining jig that can improve the accuracy of the joining position between a linear member such as a wire and a ring-shaped member, and enable stable joining. [Means for solving the problem]

[0009] The linear member joining jig of the present invention, which is able to solve the above problems, is as follows. [1] A jig for joining distal portions of a plurality of linear members to a ring-shaped member, a plurality of protrusions insertable into an inner cavity of the ring-shaped member; A protrusion holder that holds a plurality of the protrusions; a linear member support portion disposed opposite the protrusion holder and extending in a direction away from the protrusion holder, the protrusion protrudes toward the linear member support portion of the protrusion holder, The protrusion holder is a linear member joining jig that is displaceable in a direction perpendicular to the protruding direction of the protrusion. [2] The linear member joining jig described in [1], wherein the protrusion holder is displaceable in the horizontal direction. [3] A linear member joining jig as described in [1] or [2], wherein the protrusion holder is displaceable in the vertical direction. [4] The linear member joining jig according to any one of [1] to [3], wherein the multiple protrusions have different cross-sectional areas perpendicular to the extending direction of each of the protrusions. [5] A linear member joining jig described in any of [1] to [4], wherein the linear member support portion has a groove portion in which an unjoined linear member to the ring-shaped member can be placed, and a space on the opposite side of the groove portion in which a linear member joined to the ring-shaped member can be accommodated. [6] A linear member joining jig as described in [5], wherein the maximum size of the space in the height direction of the linear member support portion is greater than the maximum depth of the groove portion. [7] A linear member joining jig described in any of [1] to [6], wherein the cross-sectional shape of the protrusion in a cross section perpendicular to the extension direction of the protrusion has a curved portion at the top and a straight portion below the curved portion. [8] The linear member support portion has a groove portion in which a linear member not yet joined to the ring-shaped member can be placed, and a space on the opposite side of the groove portion in which a linear member joined to the ring-shaped member can be accommodated, The space has an upper wall surface, A linear member joining jig as described in [7], wherein when viewed from the extension direction of the space, the angle that the straight portion forms with the upper wall surface is greater than or equal to 0 degrees and less than 10 degrees. [9] The ring-shaped member has a notch extending along an axial direction of the ring-shaped member, The linear member joining jig according to any one of [5] to [8], wherein a linear member that has not been joined to the ring-shaped member is placed in the groove portion and disposed inside the cutout portion.

[10] The protrusion has a recess extending in a direction toward the linear member support portion, The linear member joining jig according to any one of [5] to [9], wherein, when viewed from the depth direction of the recess, a virtual line passing through one end and the other end of the recess overlaps with the groove.

[11] A linear member joining jig as described in [9] or

[10] , wherein the width of the groove portion is larger than the width of the cutout portion. Effect of the Invention

[0010] The linear member joining jig of the present invention has a plurality of protrusions that can be inserted into the inner cavity of a ring-shaped member, a protrusion holder that holds the plurality of protrusions, and a linear member support portion that is disposed opposite the protrusion holder and extends in a direction away from the protrusion holder, and since the protrusion holder can be displaced in a direction perpendicular to the protrusion direction of the protrusions, it is easy to switch to protrusions that are suitable for the shape of the ring-shaped members to be joined and the number of linear members to be joined by displacing the protrusion holder. Therefore, when joining the ring-shaped members and linear members, it is easy to efficiently join the ring-shaped members and linear members while aligning them. [Brief description of the drawings]

[0011] [Figure 1] 1 is a perspective view of a linear member joining jig according to an embodiment of the present invention; [Diagram 2] 13 is a perspective view of a ring-shaped member having distal portions of multiple linear members joined together. FIG. [Diagram 3] 2 is a side view of a projection holder of the linear member joining jig shown in FIG. 1. [Figure 4] 2 is a side view of the linear member joining jig shown in FIG. 1. [Diagram 5] 2 is a cross-sectional view perpendicular to the extending direction of a protrusion of the linear member joining jig shown in FIG. 1. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] The present invention will be described in more detail below based on the following embodiments, but the present invention is not limited to the following embodiments, and can be modified as long as it meets the purpose described above and below, and all of these modifications are included in the technical scope of the present invention. In addition, hatching and component symbols may be omitted in each drawing for convenience, but in such cases, the specification and other drawings should be referred to. In addition, the dimensions of various components in the drawings may differ from the actual dimensions because priority is given to helping understand the features of the present invention.

[0013] FIG. 1 is a perspective view of a linear member joining jig 1 according to an embodiment of the present invention, and FIG. 2 is a perspective view of a ring-shaped member 110 to which distal portions of a plurality of linear members 120 are joined. FIG. 1 illustrates a state in which the linear member 120 is joined to the ring-shaped member 110 using the linear member joining jig 1, and the ring-shaped member 110 and the linear member 120 are arranged in the linear member joining jig 1. As shown in FIG. 1 and FIG. 2, the linear member joining jig 1 is a jig for joining distal portions of a plurality of linear members 120 to the ring-shaped member 110, and has a plurality of protrusions 11 that can be inserted into the inner cavity of the ring-shaped member 110, a protrusion holder 60 that holds the plurality of protrusions 11, and a linear member support part 20 that is arranged opposite the protrusion holder 60 and extends in a direction away from the protrusion holder 60. In this specification, the linear member joining jig 1 may be referred to as a "joining jig 1".

[0014] The joining jig 1 is preferably used in the manufacture of a movable-tip catheter having a tube, a ring-shaped member 110 disposed in the lumen of the distal end of the tube, and a number of linear members 120 whose distal ends are joined to the ring-shaped member 110.

[0015] 2, distal portions of a plurality of linear members 120 are joined to a ring-shaped member 110. By disposing the ring-shaped member 110 to which the distal portions of the plurality of linear members 120 are joined in the inner cavity of a tube constituting the shaft of a catheter and connecting the proximal portions of the plurality of linear members 120 to a handle, it becomes possible to bend the distal end portion of the tube by operating the handle.

[0016] The ring-shaped member 110 is a ring-shaped member. Examples of the shape of the ring-shaped member 110 include a cylindrical shape, a polygonal cylindrical shape, a shape with a C-shaped cross section with a notch in a cylinder, and a coil shape with a wound wire. Among them, the shape of the ring-shaped member 110 is preferably cylindrical. By having the ring-shaped member 110 have a cylindrical shape, the surface of the ring-shaped member 110 becomes smooth. Therefore, in a catheter, even if the surface of the ring-shaped member 110 comes into contact with a tube, it is possible to make it difficult for the tube to be damaged.

[0017] Examples of materials constituting the ring-shaped member 110 include metals such as stainless steel, carbon steel, titanium, nickel-titanium alloy, cobalt-chromium alloy, and tungsten alloy; synthetic resins such as aromatic polyether ketone resin (e.g., PEEK), polycarbonate resin, and fiber-reinforced resin; synthetic rubbers such as butadiene rubber, isoprene rubber, styrene butadiene rubber, ethylene propylene rubber, acrylic rubber, and silicone rubber; and natural rubber. Among these, the material constituting the ring-shaped member 110 is preferably a metal, and more preferably stainless steel. By using a metal as the material constituting the ring-shaped member 110, the strength of the ring-shaped member 110 is increased, and the ring-shaped member 110 is less likely to break even if the distal end of the tube is repeatedly bent.

[0018] The linear member 120 may be a single wire or may have a configuration made up of multiple wires. That is, the linear member 120 may be a solid wire or a twisted wire. In particular, the linear member 120 is preferably a solid wire. When the linear member 120 is a solid wire, it becomes easier to firmly join the linear member 120 to the ring-shaped member 110.

[0019] The shape of the cross section perpendicular to the longitudinal axis direction of the linear member 120 can be, for example, a circle, an oval, a polygon, or a combination of these. Among these, the shape of the cross section perpendicular to the longitudinal axis direction of the linear member 120 is preferably a circle. When the cross section shape of the linear member 120 is a circle, the surface of the linear member 120 becomes smooth. Therefore, even if the linear member 120 comes into contact with the tube in the lumen of the tube, the tube is less likely to be damaged.

[0020] Examples of materials constituting the linear member 120 include metals such as stainless steel, titanium, nickel-titanium alloy, cobalt-chromium alloy, and tungsten alloy, and fibers such as polyarylate fiber, aramid fiber, ultra-high molecular weight polyethylene fiber, PBO fiber, and carbon fiber. The fibers may be monofilaments or multifilaments. Among them, the material constituting the linear member 120 is preferably a metal, and more preferably stainless steel. By using a metal as the material constituting the linear member 120, the strength of the linear member 120 can be increased, and the linear member 120 can be made less likely to be damaged even if the linear member 120 is pulled toward the hand side due to bending of the distal end of the tube.

[0021] The material constituting the linear member 120 may be different from the material constituting the ring-shaped member 110, but is preferably the same as the material constituting the ring-shaped member 110. By using the same material constituting the linear member 120 as the material constituting the ring-shaped member 110, the bonding strength between the ring-shaped member 110 and the linear member 120 can be easily increased.

[0022] 1, the joining jig 1 has a plurality of protrusions 11, a protrusion holder 60, and a linear member support part 20. The linear member support part 20 is disposed opposite the protrusion holder 60, and extends in a direction away from the protrusion holder 60. The protrusion 11 can be inserted into the inner cavity of the ring-shaped member 110, and protrudes in the direction of the linear member support part 20 side of the protrusion holder 60. In joining the linear member 120 to the ring-shaped member 110, the joining jig 1 supports the ring-shaped member 110 by the protrusions 11, and supports the linear member 120 by the linear member support part 20.

[0023] The protrusion holder 60 is displaceable in a direction perpendicular to the protrusion direction of the protrusion 11. Specifically, when the protrusion direction of the protrusion 11 is the depth direction from the front side to the back side, the protrusion holder 60 is displaceable in a direction including a horizontal direction and a vertical direction component that are perpendicular to the depth direction. The protrusion holder 60 may be, for example, a polygonal plate shape, a disk shape, or the like.

[0024] The joining jig 1 can be inserted into the inner cavity of the ring-shaped member 110, and has the protrusion 11 that protrudes in the direction of the linear member support portion 20 of the protrusion holder 60, so that the ring-shaped member 110 can be supported from the inside of the ring-shaped member 110. This makes it easier to join the ring-shaped member 110 and the linear member 120 stably.

[0025] It is preferable that the length of the protruding portion 11 in the extension direction is longer than the axial length of the ring-shaped member 110. By making the length of the protruding portion 11 in the extension direction longer than the axial length of the ring-shaped member 110, it becomes possible for the protruding portion 11 to support the entire ring-shaped member 110 in the axial direction. Therefore, the protruding portion 11 can support the ring-shaped member 110 more stably.

[0026] Since multiple protrusions 11 are arranged on the side of the protrusion holder 60 closer to the linear member support part 20, it is possible to switch to protrusions 11 suitable for the ring-shaped member 110 and linear member 120 used for joining by displacing the protrusion holder 60 in a direction perpendicular to the protruding direction of the protrusions 11. Therefore, it is possible to precisely align the ring-shaped member 110 and the linear member 120, and it is possible to easily join the ring-shaped member 110 and the linear member 120 efficiently.

[0027] Examples of materials constituting the protrusion holder 60 include metals such as iron, copper, aluminum, and alloys thereof, and synthetic resins such as acrylic resins and aromatic polyether ketone resins (e.g., PEEK). For example, examples of iron alloys include stainless steel, examples of copper alloys include brass, and examples of aluminum alloys include duralumin. Among these, it is preferable that the material constituting the protrusion holder 60 is a metal. By using a metal as the material constituting the protrusion holder 60, the strength of the protrusion holder 60 can be increased.

[0028] The protrusion 11 may be a separate member from the protrusion holder 60, or may be an integral structure with the protrusion holder 60. In particular, it is preferable that the protrusion 11 is an integral structure with the protrusion holder 60. By having the protrusion 11 be an integral structure with the protrusion holder 60, it is possible to prevent the protrusion 11 from unintentionally coming off the protrusion holder 60 when the protrusion holder 60 is displaced, for example. As a result, it is possible to provide a joining jig 1 that can stably join the ring-shaped member 110 and the linear member 120.

[0029] When the protrusion 11 is a member separate from the protrusion holder 60, the material constituting the protrusion 11 may be metal such as iron, copper, aluminum, or an alloy thereof, or synthetic resin such as acrylic resin or aromatic polyether ketone resin (e.g., PEEK). Among these, the material constituting the protrusion 11 is preferably different from the material constituting the ring-shaped member 110 and the material constituting the linear member 120. By using a material constituting the protrusion 11 that is different from the material constituting the ring-shaped member 110 and the linear member 120, it is possible to reduce the risk that the protrusion 11 will also be joined when the linear member 120 is joined to the ring-shaped member 110.

[0030] Moreover, the material constituting the protrusion 11 is preferably a metal and different from the material constituting the ring-shaped member 110 and the linear member 120. Specifically, when the material constituting the ring-shaped member 110 and the linear member 120 is stainless steel, the material constituting the protrusion 11 is preferably brass. By making the material constituting the protrusion 11 a metal and different from the material constituting the ring-shaped member 110 and the linear member 120, the strength of the protrusion 11 can be increased while preventing the ring-shaped member support part 10 from being joined together when the ring-shaped member 110 and the linear member 120 are joined. Therefore, even if the ring-shaped member 110 is repeatedly attached to and detached from the protrusion 11, the protrusion 11 is less likely to be damaged, such as deformed.

[0031] When the protrusion 11 is a separate member from the protrusion holder 60, the material constituting the protrusion 11 is preferably the same as the material constituting the protrusion holder 60. By using the same material constituting the protrusion 11 as the material constituting the protrusion holder 60, it is possible to prevent at least one of the protrusion holder 60 and the protrusion 11 from being damaged when attaching the protrusion 11 to the protrusion holder 60.

[0032] Examples of materials constituting the linear member support part 20 include metals such as iron, copper, aluminum, or alloys thereof, and synthetic resins such as acrylic resins and aromatic polyether ketone resins (e.g., PEEK). Among these, the material constituting the linear member support part 20 is preferably a synthetic resin. By using a synthetic resin as the material constituting the linear member support part 20, the weight of the linear member support part 20 is less likely to become heavy. As a result, the overall weight of the joining jig 1 can be reduced, and the joining jig 1 can be made easy to handle. In addition, by using a synthetic resin as the material constituting the linear member support part 20, it is possible to make it less likely that another object such as the linear member 120 will be damaged when the linear member support part 20 comes into contact with the other object.

[0033] The ring-shaped member 110 and the linear member 120 can be joined by, for example, welding, adhesion, fusion, brazing, etc. Among these, it is preferable to join the ring-shaped member 110 and the linear member 120 by welding. By joining the ring-shaped member 110 and the linear member 120 by welding, it is possible to easily increase the joining strength between the ring-shaped member 110 and the linear member 120.

[0034] The joining portion of the ring-shaped member 110 with the linear member 120 is preferably located at least on the outer surface of the ring-shaped member 110. Specifically, when the ring-shaped member 110 and the linear member 120 are joined by welding, it is preferable that the welding is performed from the outside of the ring-shaped member 110, and the ring-shaped member 110 and the linear member 120 are joined at least on the outer surface of the ring-shaped member 110. By having the joining portion of the ring-shaped member 110 with the linear member 120 located at least on the outer surface of the ring-shaped member 110, joining of the ring-shaped member 110 and the linear member 120 becomes easier, and it becomes possible to improve the accuracy of alignment between the ring-shaped member 110 and the linear member 120 and to increase the joining strength.

[0035] 1, the joining jig 1 preferably has a pedestal 40 for fixing the protrusion holder 60 and the linear member support part 20. The pedestal 40 preferably has the protrusion holder 60 and the linear member support part 20 placed thereon and fixed thereto. Since the joining jig 1 has the pedestal 40, the protrusion holder 60 and the linear member support part 20 can be stably arranged, making it easier to join the ring-shaped member 110 and the linear member 120.

[0036] Examples of the material constituting the base 40 include metals such as iron, copper, aluminum, and alloys thereof, and synthetic resins such as acrylic resin and aromatic polyether ketone resin (e.g., PEEK). Among them, the material constituting the base 40 is preferably a synthetic resin. By using a synthetic resin as the material constituting the base 40, the overall weight of the joining jig 1 can be reduced, and the joining jig 1 can be easily handled. In addition, by using a synthetic resin as the material constituting the base 40, it is possible to reduce the risk of scratching other objects such as the ring-shaped member 110 and the linear member 120 when they come into contact with the base 40. It is more preferable that the material constituting the base 40 is the same as the material constituting the linear member support portion 20.

[0037] Fig. 3 is a side view of the protrusion holder 60 of the joining jig 1. Fig. 3 is a view of the protrusion holder 60 as seen from the tip side of the protrusion 11, that is, from the side where the linear member support part 20 is arranged.

[0038] 1 and 3, the multiple protrusions 11 extend in a direction parallel to the central axis of the protrusion holder 60, and the multiple protrusions 11 preferably have different cross-sectional areas perpendicular to the extension direction of the respective protrusions 11. In other words, the multiple protrusions 11 are preferably configured such that the shapes and sizes of the protrusions 11 in a cross section perpendicular to the extension direction of the respective protrusions 11 are different. Since the multiple protrusions 11 are configured such that the cross-sectional areas perpendicular to the extension direction of the respective protrusions 11 are different, it becomes possible to provide a joining jig 1 that can accommodate various aspects of the ring-shaped members 110 and linear members 120, such as the shape of the ring-shaped members 110 used for joining and the number of linear members 120 to be joined.

[0039] 1, the linear member support part 20 preferably has a groove part 31 in which a linear member 121 not yet joined to the ring-shaped member 110 can be placed, and a space 32 on the opposite side of the groove part 31 in which a linear member 122 joined to the ring-shaped member 110 can be accommodated. When joining the ring-shaped member 110 and the linear member 120 using the joining jig 1, the linear member 121 before being joined to the ring-shaped member 110 is placed in the groove part 31 of the linear member support part 20, and the linear member 122 after being joined to the ring-shaped member 110 is accommodated in the space 32 of the linear member support part 20. Specifically, the linear member 120 is placed in the groove portion 31, and the linear member 121 placed in the groove portion 31 is joined to the ring-shaped member 110 supported by the protrusion portion 11, and the ring-shaped member 110 is rotated or moved, etc., so that the linear member 122 joined to the ring-shaped member 110 is accommodated in the space 32.

[0040] The space 32 is located on the opposite side of the groove portion 31. In other words, the space 32 is located on the surface of the linear member support portion 20 opposite to the surface on which the groove portion 31 is located. Specifically, in the joining jig 1 shown in FIG. 1 , the groove portion 31 is arranged on the upper surface of the linear member support portion 20, and the space 32 is arranged on the lower surface of the linear member support portion 20.

[0041] The space 32 of the linear member support part 20 only needs to be capable of accommodating the linear member 122 joined to the ring-shaped member 110, and may be, for example, a groove formed in the linear member support part 20. In addition, for example, the linear member support part 20 may be configured to have a top plate part and legs, and the space 32 may be formed below the top plate part and around the periphery of the legs.

[0042] Since the linear member support portion 20 has the groove portion 31 in which the linear member 121 not yet joined to the ring-shaped member 110 can be placed, the linear member 121 before being joined to the ring-shaped member 110 can be placed in the groove portion 31, thereby making it easier to align the ring-shaped member 110 with the linear member 121. Therefore, it is easy to place the linear member 120 on the ring-shaped member 110 at a desired position with high precision, and it is easy to manufacture a ring-shaped member 110 with a high precision in the position where the linear member 120 is joined.

[0043] Furthermore, since the linear member support portion 20 has the space 32 capable of accommodating the linear member 122 joined to the ring-shaped member 110, by accommodating the linear member 122 after joining to the ring-shaped member 110 in the space 32, it is possible to make it less likely that the joined linear member 120 will interfere with joining the ring-shaped member 110 to another linear member 121 before joining. As a result, it becomes easier to join the multiple linear members 120 to the ring-shaped member 110 while aligning them with high precision.

[0044] Fig. 4 is a side view of the joining jig 1, as viewed from the linear member support part 20 side. As shown in Fig. 4, the depth direction of the groove 31 is preferably vertical. Since the depth direction of the groove 31 of the linear member support part 20 is vertical, the linear member 121 before being joined to the ring-shaped member 110 can be placed in the groove 31 and supported. As a result, it becomes easier to adjust the joining position between the ring-shaped member 110 and the linear member 120.

[0045] As shown in FIG. 4, the maximum size D4 of the space 32 in the height direction of the linear member support portion 20 is preferably larger than the maximum depth D3 of the groove portion 31. In addition, as shown in FIG. 4, when the depth direction of the groove portion 31 is the vertical direction, the maximum depth D3 of the groove portion 31 indicates the maximum distance from the opening of the groove portion 31 to the bottom in the vertical direction. Also, as shown in FIG. 4, the maximum size D4 of the space 32 in the height direction of the linear member support portion 20 indicates the maximum distance of the space 32 in the vertical direction. Since the maximum size D4 of the space 32 is larger than the maximum depth D3 of the groove portion 31, it is possible to accommodate the linear member 122 joined to the ring-shaped member 110 deep inside the space 32. As a result, the distance between the linear members 120 adjacent to each other in the circumferential direction of the ring-shaped member 110 can be increased, making it easier to join the ring-shaped member 110 and the linear member 120.

[0046] The maximum size D4 of the space 32 in the height direction of the linear member support part 20 is preferably 5 times or more, more preferably 10 times or more, and even more preferably 15 times or more, of the maximum depth D3 of the groove part 31. By setting the lower limit of the ratio of the maximum size D4 of the space 32 to the maximum depth D3 of the groove part 31 within the above range, it is possible to easily accommodate the linear member 122 joined to the ring-shaped member 110 in the space 32. Moreover, the maximum size D4 of the space 32 is preferably 100 times or less, more preferably 95 times or less, and even more preferably 90 times or less, of the maximum depth D3 of the groove part 31. By setting the upper limit of the ratio of the maximum size D4 of the space 32 to the maximum depth D3 of the groove part 31 within the above range, it is possible to prevent the size of the space 32 from becoming too large, and to increase the strength of the linear member support part 20.

[0047] In the joining jig 1, it is preferable that at least one of the protrusion holder 60 and the linear member support part 20 is movable in a direction toward and away from each other. In detail, it is preferable that the joining jig 1 has a first state in which the shortest distance between the protrusion 11 and the linear member support part 20 in the direction from the protrusion holder 60 to the linear member support part 20 is a first distance that is greater than the axial length of the ring-shaped member 110, and a second state in which the shortest distance between the protrusion 11 and the linear member support part 20 in the direction from the protrusion holder 60 to the linear member support part 20 is a second distance that is smaller than the first distance. Since at least one of the protrusion holder 60 and the linear member support part 20 can be moved toward and away from each other, the distance between the protrusion 11 and the linear member support part 20 in the direction from the tip of the protrusion 11 toward the linear member support part 20 can be changed, making it easier to attach and remove the ring-shaped member 110 to the protrusion 11 and also easier to align the ring-shaped member 110 and the linear member 120.

[0048] It is preferable that the protrusion holder 60 is movable in a direction approaching the linear member support portion 20 and in a direction away from the linear member support portion 20. Since the protrusion holder 60 is movable in a direction approaching the linear member support portion 20 and in a direction away from the linear member support portion 20, a load is not likely to be applied to the linear member 120 supported by the linear member support portion 20 by moving the protrusion holder 60 when aligning the ring-shaped member 110 with the linear member 120 or when removing the ring-shaped member 110 from the protrusion 11. As a result, when joining the linear member 120 to the ring-shaped member 110, damage such as bending of the linear member 120 is not likely to occur.

[0049] It is preferable that the protrusion holder 60 is displaceable in the horizontal direction. It is also preferable that the protrusion holder 60 is displaceable in the vertical direction. By displacing the protrusion holder 60 in at least one of the horizontal and vertical directions, it becomes easier to align the ring-shaped member 110 and the linear member 120, and it becomes easier to efficiently join the ring-shaped member 110 and the linear member 120.

[0050] It is more preferable that the protrusion holder 60 is displaceable in the horizontal and vertical directions. In other words, by displacing the protrusion holder 60 in the horizontal and vertical directions, it becomes easier to align the ring-shaped member 110 and the linear member 120. The protrusion holder 60 may have a central axis and be rotatable about the central axis as the axis of rotation, and may be configured to be displaced in the horizontal and vertical directions by the rotation of the protrusion holder 60.

[0051] The linear member support part 20 may be movable in at least one of a direction toward the protrusion holder 60 and a direction away from the protrusion holder 60, but it is preferable that it cannot move in either direction. By making the linear member support part 20 immovable, a load caused by the movement of the linear member support part 20 is less likely to be applied to the linear member 120 supported by the linear member support part 20, making it easier to prevent damage to the linear member 120.

[0052] FIG. 5 is a cross-sectional view perpendicular to the extending direction of the protruding portion 11 of the joining jig 1. As shown in FIG. 5, the cross-sectional shape of the protruding portion 11 in a cross section perpendicular to the extending direction of the protruding portion 11 preferably has a curved portion 12 at the top and a straight portion 13 below the curved portion 12. The extending direction of the straight portion 13 in a cross section perpendicular to the extending direction of the protruding portion 11 may be horizontal or vertical. Since the cross-sectional shape of the protruding portion 11 has the curved portion 12 at the top and the straight portion 13 below the curved portion 12, the curved portion 12 supports the upper portion of the ring-shaped member 110 from the inside of the ring-shaped member 110, while the protruding portion 11 has the straight portion 13 below the curved portion 12, so that the linear member 122 joined to the ring-shaped member 110 is less likely to interfere with the protruding portion 11. Therefore, the ring-shaped member 110 in which the protruding portion 11 is inserted into the inner cavity can be easily rotated. In addition, when the ring-shaped member 110 with the protrusion 11 inserted into the inner cavity is rotated, the linear member 120 joined to the ring-shaped member 110 is less likely to come into contact with the protrusion 11, making it less likely that the linear member 120 will be damaged, such as by bending.

[0053] 5, the cross-sectional shape of protruding portion 11 in a cross section perpendicular to the extending direction of protruding portion 11 preferably has both straight portion 13 extending horizontally and straight portion 13a extending vertically below curved portion 12. By having the cross-sectional shape of protruding portion 11 have straight portion 13 extending horizontally and straight portion 13a extending vertically below curved portion 12, the effect of preventing linear member 122 joined to ring-shaped member 110 from interfering with protruding portion 11 can be further enhanced.

[0054] 4 and 5, the space 32 has an upper wall surface 21, and the angle that the straight line portion 13 forms with the upper wall surface 21 is preferably 0 degrees or more and 10 degrees or less (including 0 degrees) when viewed from the extending direction of the space 32. By making the angle that the straight line portion 13 forms with the upper wall surface 21 0 degrees or more and 10 degrees or less, when the linear member 120 joined to the ring-shaped member 110 is accommodated inside the space 32, the linear member 120 is less likely to come into contact with the upper wall surface 21 of the space 32. As a result, it is possible to make it less likely that the linear member 120 joined to the ring-shaped member 110 will come into contact with the upper wall surface 21 of the space 32, causing damage such as bending of the linear member 120.

[0055] It is more preferable that the straight line portion 13 is parallel to the upper wall surface 21 when viewed from the extension direction of the space 32. In other words, it is more preferable that the angle that the straight line portion 13 forms with the upper wall surface 21 is 0 degrees when viewed from the extension direction of the space 32. By having the straight line portion 13 parallel to the upper wall surface 21, the linear member 120 joined to the ring-shaped member 110 and the upper wall surface 21 are less likely to come into contact with each other.

[0056] 2, the ring-shaped member 110 has a cutout portion 111 extending along the axial direction of the ring-shaped member 110, and it is preferable that the linear member 121 not yet joined to the ring-shaped member 110 is placed in the groove portion 31 and disposed inside the cutout portion 111. By placing the linear member 121 not yet joined to the ring-shaped member 110 in the groove portion 31 and disposed inside the cutout portion 111, when the linear member 120 is joined to the ring-shaped member 110, the unjoined linear member 121 is disposed both inside the groove portion 31 and the cutout portion 111. As a result, the groove portion 31 and the cutout portion 111 can increase the accuracy of alignment between the ring-shaped member 110 and the unjoined linear member 121.

[0057] As shown in Figs. 1, 3 and 5, the protruding portion 11 has a recessed portion 33 extending in a direction toward the linear member support portion 20, and it is preferable that a virtual straight line passing through one end and the other end of the recessed portion 33 overlaps with the groove portion 31 when viewed from the depth direction of the recessed portion 33. In other words, it is preferable that the recessed portion 33 extends in a direction approaching the linear member support portion 20, and that the extending direction of the recessed portion 33 of the protruding portion 11 is the same as the extending direction of the groove portion 31 of the linear member support portion 20 when viewed from above the joining jig 1. Since the virtual straight line passing through one end and the other end of the recessed portion 33 overlaps with the groove portion 31, it is possible to prevent the positional deviation between the ring-shaped member 110 and the linear member 120 from occurring when joining the ring-shaped member 110 and the linear member 120.

[0058] The length of the cutout portion 111 in the axial direction of the ring-shaped member 110 is preferably shorter than the axial length of the ring-shaped member 110. When the length of the cutout portion 111 is shorter than the axial length of the ring-shaped member 110, it becomes easier to align the ring-shaped member 110 and the linear member 120.

[0059] The width of the groove 31 is preferably larger than the width of the cutout 111. By making the width of the groove 31 larger than the width of the cutout 111, it becomes easier to place the linear member 120 in the groove 31 while aligning the ring-shaped member 110 with the linear member 120. Therefore, the joining of the ring-shaped member 110 and the linear member 120 can be efficiently performed.

[0060] The width of the groove 31 is preferably 1.05 times or more, more preferably 1.10 times or more, and even more preferably 1.15 times or more, of the width of the cutout 111. By setting the lower limit of the ratio between the width of the groove 31 and the width of the cutout 111 within the above range, the linear member 121 not yet joined to the ring-shaped member 110 can be easily arranged inside the groove 31 while being arranged inside the cutout 111. Therefore, it is possible to easily align the ring-shaped member 110 and the linear member 120. In addition, the width of the groove 31 is preferably 3.0 times or less, more preferably 2.5 times or less, and even more preferably 2.0 times or less, of the width of the cutout 111. By setting the upper limit of the ratio between the width of the groove 31 and the width of the cutout 111 within the above range, it is easy to align the ring-shaped member 110 and the linear member 120, and misalignment between the ring-shaped member 110 and the linear member 120 is unlikely to occur. [Explanation of symbols]

[0061] 1: Linear component joining jig 11:Protrusion 12: Music section 13: Straight section 13a: Straight section 20: Linear member support part 21: Upper wall 31: Groove 32: Space 33: Recess 40: Pedestal 60:Protrusion holder 110: Ring-shaped member 111: Notch 120: Linear member 121: Linear member not joined to ring-shaped member 122: Linear member joined to ring-shaped member D3: Maximum depth of groove D4: Maximum size of space

Claims

1. A jig for joining distal portions of a plurality of linear members to a ring-shaped member, comprising: a plurality of protrusions insertable into an inner cavity of the ring-shaped member; A protrusion holder that holds a plurality of the protrusions; a linear member support portion disposed opposite the protrusion holder and extending in a direction away from the protrusion holder, the protrusion protrudes toward the linear member support portion of the protrusion holder, The protrusion holder is a linear member joining jig that is displaceable in a direction perpendicular to the protruding direction of the protrusion.

2. The linear member joining jig according to claim 1 , wherein the protrusion holder is displaceable in a horizontal direction.

3. 3. The linear member joining jig according to claim 1, wherein the protrusion holder is vertically displaceable.

4. The linear member joining jig according to claim 1 or 2, wherein the plurality of protrusions have different cross-sectional areas perpendicular to the extending direction of each of the protrusions.

5. The linear member joining jig described in claim 1 or 2, wherein the linear member support portion has a groove portion in which an unjoined linear member to the ring-shaped member can be placed, and a space on the opposite side of the groove portion in which a linear member joined to the ring-shaped member can be accommodated.

6. The linear member joining jig according to claim 5 , wherein a maximum size of the space in a height direction of the linear member support portion is greater than a maximum depth of the groove portion.

7. 3. The linear member joining jig according to claim 1, wherein a cross-sectional shape of the protrusion in a cross section perpendicular to an extending direction of the protrusion has a curved portion at an upper portion and a straight portion below the curved portion.

8. the linear member support portion has a groove portion in which a linear member not yet joined to the ring-shaped member can be placed, and a space on the opposite side of the groove portion in which a linear member joined to the ring-shaped member can be accommodated, The space has an upper wall surface, The jig for joining linear members according to claim 7 , wherein an angle between the linear portion and the upper wall surface when viewed from the extending direction of the space is equal to or greater than 0 degrees and equal to or less than 10 degrees.

9. the ring-shaped member has a notch extending along an axial direction of the ring-shaped member, 6. The linear member joining jig according to claim 5, wherein the linear member that is not joined to the ring-shaped member is placed in the groove and disposed inside the cutout.

10. the protruding portion has a recessed portion extending in a direction toward the linear member support portion, The jig for joining linear members according to claim 9 , wherein an imaginary line passing through one end and the other end of the recess overlaps with the groove when viewed in a depth direction of the recess.

11. The jig for joining linear members according to claim 9 , wherein a width of the groove portion is greater than a width of the notch portion.

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