Nut and nut manufacturing method

Abstract

To provide a lightweight nut excellent in water cut-off performance and fastening performance and easy to manufacture.SOLUTION: The nut 1 includes a metallic portion 111 made of a metallic material and forming an 11a of a female screw, a resinous portion 112 provided on an outer peripheral side of the metallic portion and forming an 11d of a groove portion having a groove shape into which a mounted component 2 is inserted in a direction non-parallel to an axial direction of the female screw, and a bolt housing member 12 made of a resinous material and housing a portion of an 3a of a male screw portion of a bolt 3 screwed into the female screw, the portion protruding from the metallic portion. The bolt housing member has a cylindrical part 121 having a shape cylindrically extending in the axial direction of the female screw, and a flange part 123 having a shape expanding outward in the radial direction from an end part on the resin part side of the cylindrical part, and joined to the resin part.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a nut and a method for manufacturing the nut. [Background technology]

[0002] Patent Document 1 describes a nut used to attach interior and exterior parts such as garnishes, front under spoilers, side skirts, and rear under spoilers to an automobile body. This nut of the prior art has a rectangular flange portion formed on one axial end and a flange plate formed on the other axial end, and is attached to a part by sliding the rectangular flange portion into a locking groove formed in an opening of the part. Then, with the nut fixed to the part, a bolt is tightened.

[0003] This nut is formed by caulking a cylindrical portion to a flange plate. The cylindrical portion has an internal thread formed on the inner surface and a square flange formed on the lower edge. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 11-153119 Summary of the Invention [Problem to be solved by the invention]

[0005] The nuts of the above-mentioned prior art are used in locations close to the exterior of the automobile. Therefore, there is a risk of water seeping in through the nuts when fastened. Furthermore, the nuts of the above-mentioned prior art are difficult to manufacture because they have a structure in which the cylindrical portion is crimped to fix the cylindrical portion to the flange plate.

[0006] The nuts of the above-mentioned prior art are used on automobile bodies, so they must be lightweight. Patent Document 1 does not mention the material of the nut, but considering the structure in which the crimped cylindrical portion is fixed to the flange plate by crimping, it is assumed that the nut is made of metal. If the nut is made of resin, it can be made lighter than metal nuts, but nuts made of resin have inferior fastening properties compared to nuts made of metal.

[0007] The present invention has been made in view of the above background, and aims to provide a lightweight nut that is excellent in watertightness and fastening properties, and is easy to manufacture.

[0008] The present invention has been made in view of the above background, and aims to provide a manufacturing method for a nut that is excellent in watertightness and fastening properties, is easy to manufacture, and is lightweight. [Means for solving the problem]

[0009] The first aspect of the present invention is a metal part (111) formed of metal and forming a female thread (11a); a resin portion (112) formed of resin and provided on the outer periphery of the metal portion, the resin portion (112) being groove-shaped and forming a groove portion (11d) into which the attached part (2) is inserted in a direction non-parallel to the axial direction of the female thread; a bolt receiving member (12) formed of resin and configured to receive a portion of the male thread portion (3a) of the bolt (3) that is threadedly engaged with the female thread and that protrudes from the metal portion; The bolt receiving member is a cylindrical portion (121) having a cylindrical shape extending in the axial direction of the female screw; The nut (1) has a flange portion (123) that has a shape that expands radially outward from the end of the cylindrical portion on the resin portion side and is joined to the resin portion.

[0010] A second aspect of the present invention is a metal part (111) formed of metal and forming a female thread (11a); a resin portion (112) formed of resin and provided on the outer periphery of the metal portion, the resin portion (112) being groove-shaped and forming a groove portion (11d) into which the attached part (2) is inserted in a direction non-parallel to the axial direction of the female thread; a bolt receiving member (12) formed of resin, which receives a portion of the male thread portion (3a) of the bolt (3) that is screwed into the female thread and protrudes from the metal portion, and which is joined to the resin portion; The nut (1) has a recess (124) formed on the inner surface of the bolt accommodating member at the end opposite the metal portion, the recess (124) being coaxial with the female thread.

[0011] A third aspect of the present invention is a metal part (111) formed of metal and forming a female thread (11a); a resin portion (112) formed of resin and provided on the outer periphery of the metal portion, the resin portion (112) being groove-shaped and forming a groove portion (11d) into which the attached part (2) is inserted in a direction non-parallel to the axial direction of the female thread, The metal portion and the resin portion constitute a seat portion (11b) that comes into contact with a fastened member (4), The nut (1) has a seat projection (112a) that projects annularly in the axial direction formed at a portion of the resin portion that constitutes the seat portion (11b).

[0012] A fourth aspect of the present invention is a manufacturing method for manufacturing the nut of the first aspect, A nut body molding step (S110) for molding a nut body (11) consisting of the metal part and the resin part; a bolt receiving member forming step (S120) of forming the bolt receiving member; The method for manufacturing a nut (S100) includes a joining process (S130) of joining the bolt accommodating member molded in the bolt accommodating member molding process to the resin portion of the nut main body molded in the nut main body molding process.

[0013] A fifth aspect of the present invention is a manufacturing method for manufacturing the nut of the second aspect, A nut body molding step (S110) for molding a nut body (11) consisting of the metal part and the resin part; a bolt receiving member forming step (S120) of forming the bolt receiving member; A joining step (S130) of joining the bolt accommodating member molded in the bolt accommodating member molding step to the resin portion of the nut body molded in the nut body molding step, In the joining step (S100), a nut manufacturing method is performed in which the bolt accommodating member is joined to the resin part while being positioned relative to the nut body part by inserting a positioning pin (101) into the female thread and the recess. [Effects of the Invention]

[0014] According to the first aspect of the present invention, the bolt receiving member can prevent water from entering between the female threads and the male threads, and forming the groove from resin makes it easier to mold and lighter than when the groove is made from metal, and forming the female thread from metal improves fastening performance compared to when the female thread is made from resin. Furthermore, because the bolt receiving member has a flange, water can be further prevented from entering between the female threads and the male threads, and joining the bolt receiving member and the resin part can be facilitated.

[0015] According to the second aspect of the present invention, the bolt receiving member can prevent water from entering between the female thread and the male thread, and forming the groove from resin makes it easier to mold and lighter than when the groove is made from metal, and forming the female thread from metal improves fastening performance compared to when the female thread is made from resin. Furthermore, in the process of joining the bolt receiving member to the resin part, the bolt receiving member can be positioned coaxially with the female thread by inserting a positioning pin into the recess.

[0016] According to the third aspect of the present invention, the seat projection can prevent water from entering between the nut and the fastened member, and by forming the groove from resin, molding can be made easier and the weight can be reduced compared to when the groove is formed from metal, and by forming the female thread from metal, fastening performance can be improved compared to when the female thread is formed from resin.

[0017] As described above, according to the first to third aspects, it is possible to provide a nut that is excellent in watertightness and fastening properties, and is easy to manufacture and lightweight.

[0018] According to the fourth aspect of the present invention, the nut according to the first aspect can be easily manufactured.

[0019] According to the fifth aspect of the present invention, the nut according to the second aspect can be manufactured with high precision.

[0020] As described above, according to the fourth and fifth aspects, it is possible to provide a method for manufacturing a nut that is excellent in watertightness and fastening properties, and is easy to manufacture and lightweight. [Brief explanation of the drawings]

[0021] [Figure 1] FIG. 2 is an axial cross-sectional view showing the nut, the attached part, the fastened member, and the bolt in one embodiment. [Figure 2] FIG. 2 is a plan view showing a nut and a component to be attached in one embodiment. [Figure 3] FIG. 10 is a perspective view of a nut according to one embodiment. [Figure 4] FIG. 2 is an axial cross-sectional view of a nut according to one embodiment. [Figure 5] 4 is a flowchart illustrating a process for manufacturing a nut according to one embodiment. [Figure 6] 1 is an axial cross-sectional view showing the jig, the insert nut, and the bolt receiving member in a first state of a joining step according to one embodiment. FIG. [Figure 7] 10 is an axial cross-sectional view showing the jig, the insert nut, and the bolt receiving member in a second state of the joining step of one embodiment. FIG. [Figure 8] FIG. 10 is an axial cross-sectional view showing the jig, the insert nut, the bolt receiving member, and the vibrator in a third state of the joining step of the embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0022] The nut comprises a metal portion formed of metal and forming a female thread, a resin portion provided on the outer periphery of the metal portion and formed of resin to form a groove portion having a groove-like shape into which the attached part is inserted in a direction non-parallel to the axial direction of the female thread, and a bolt accommodating member formed of resin to accommodate the portion of the male thread portion of the bolt that screws into the female thread and protrudes from the metal portion, and the bolt accommodating member has a tubular portion that has a cylindrical shape extending in the axial direction of the female thread, and a flange portion that has a shape that expands radially outward from the end of the tubular portion on the resin portion side and is joined to the resin portion.

[0023] In the nut, the flange portion may be joined to the resin portion over the entire periphery, thereby improving the watertightness of the flange portion.

[0024] In the nut, a recess having a shape coaxial with the female thread may be formed on the inner surface of the bolt accommodating member at the end opposite the resin portion. In the step of joining the bolt accommodating member to the resin portion, a positioning pin can be inserted into the recess to position the bolt accommodating member coaxially with the female thread.

[0025] In the nut, one of the flange portion and the resin portion may have a joining protrusion formed thereon that protrudes toward the other of the flange portion and the resin portion, and the flange portion and the resin portion may be joined to each other at the joining protrusion. This allows the flange portion to be reliably joined to the resin portion.

[0026] In the nut, the end of the resin portion opposite the bolt accommodating member forms a seat portion that abuts against the fastened member, and the portion of the resin portion that forms the seat portion may be formed with a seat protrusion that protrudes annularly in the axial direction. The seat protrusion can prevent water from entering between the nut and the fastened member.

[0027] In the nut, the end of the metal part opposite the bolt receiving member may form a seating surface that abuts against the fastened workpiece, which improves fastening performance compared to when the entire seating surface is made of resin.

[0028] The nut comprises a metal portion formed of metal and forming a female thread, a resin portion formed of resin and provided on the outer periphery of the metal portion, forming a groove portion having a groove-like shape into which the attached part is inserted in a direction non-parallel to the axial direction of the female thread, and a bolt accommodating member formed of resin and accommodating the portion of the male thread portion of the bolt that screws into the female thread and protrudes from the metal portion, and is joined to the resin portion, and a recess having a shape that is concave coaxially with the female thread is formed on the inner surface of the end of the bolt accommodating member opposite the metal portion.

[0029] The nut comprises a metal part formed of metal and forming a female thread, and a resin part formed of resin and provided on the outer periphery of the metal part, forming a groove part having a groove-like shape into which the part to be fastened is inserted in a direction non-parallel to the axial direction of the female thread, the metal part and the resin part forming a seat part that abuts against the part to be fastened, and the portion of the resin part that forms the seat part has a seat protrusion that protrudes annularly in the axial direction.

[0030] The method for manufacturing a nut includes a nut body molding process for molding a nut body consisting of a metal part and a resin part, a bolt accommodating member molding process for molding a bolt accommodating member, and a joining process for joining the bolt accommodating member molded in the bolt accommodating member molding process to the resin part of the nut body molded in the nut body body molding process.

[0031] The method for manufacturing a nut includes a nut body molding process for molding a nut body consisting of a metal part and a resin part, a bolt accommodating member molding process for molding a bolt accommodating member, and a joining process for joining the bolt accommodating member molded in the bolt accommodating member molding process to the resin part of the nut body molded in the nut body body molding process, where in the joining process the bolt accommodating member is joined to the resin part in a state in which the bolt accommodating member is positioned relative to the nut body by inserting a positioning pin into the female thread and the recess.

[0032] (One embodiment) 1. Nut 1 configuration The configuration of a nut 1 in one embodiment will be described with reference to Figures 1, 2, 3, and 4. The nut 1 is a nut used when attaching interior and exterior parts such as garnishes, front under spoilers, side skirts, and rear under spoilers to an automobile body. As shown in Figures 1 and 2, the nut 1 is structured so that the part 2 can be easily attached to the nut 1 by sliding the flange 2a of the part 2 into the groove 11d of the nut 1. Note that Figure 2 is a diagram showing the shapes of the nut 1 and the part 2 when viewed from below in Figure 1.

[0033] Specifically, the part to be attached 2 can be fixed to the part to be fastened 4 by fastening the nut 1 and bolt 3 with the part to be fastened 4 sandwiched between the nut 1 and bolt 3 into which the flange 2a of the part to be attached 2 is slid. In this example, the part to be attached 2 is a bracket for attaching a sensor and is made of resin. In this example, the part to be fastened 4 is the body of an automobile and is a member made of metal.

[0034] 3 and 4, the nut 1 includes a nut body 11 and a bolt receiving member 12. The nut body 11 is formed by integrally molding a metal portion 111 made of metal and a resin portion 112 made of resin by injection molding (in other words, insert molding). The bolt receiving member 12 is welded to the nut body 11.

[0035] The metal part 111 is a female-threaded part on which a female thread 11a is formed, and is a so-called insert nut. The resin part 112 is an outer peripheral part formed on the outer peripheral side of the metal part 111. An outer peripheral groove 111a is formed on the outer peripheral surface of the metal part 111 to prevent the resin part 112 from coming off the metal part 111. That is, when the resin part 112 is formed by insert molding, a resin material enters the outer peripheral groove 111a, making it difficult for the resin part 112 to come off in the vertical direction (axial direction) from the metal part 111. The bolt receiving member 12 is a cap-shaped member integrally molded from resin into a cap shape. The resin part 112 and the bolt receiving member 12 are made of a material such as ABS resin, for example.

[0036] The nut body 11 has a seating surface portion 11b, an anti-seating surface portion 11c, and a groove portion 11d. The seating surface portion 11b abuts against the fastened member 4. The anti-seating surface portion 11c is located on the opposite side of the nut body 11 from the seating surface portion 11b, and the bolt receiving member 12 is fixed to the anti-seating surface portion 11c. The groove portion 11d is located between the seating surface portion 11b and the anti-seating surface portion 11c, and has a groove shape into which the flange 2a of the fastened part 2 is inserted.

[0037] The portion of the nut body 11 that forms the seating surface portion 11b has a disk shape, and the portion of the nut body 11 that forms the anti-seating surface portion 11c has a rectangular plate shape. The portion of the nut body 11 that forms the groove portion 11d has a disk shape with a smaller diameter than the portions that form the seating surface portion 11b and the anti-seating surface portion 11c.

[0038] In this example, groove 11d is formed as an annular groove extending in a direction perpendicular to the axial direction of female thread 11a (vertical direction in Fig. 4). Therefore, when attaching part 2 to nut 1, flange 2a of part 2 is slidably inserted into groove 11d of nut 1 in a direction perpendicular to the axial direction of female thread 11a, as shown in Figs. 1 and 2.

[0039] In order to prevent the attached part 2 from rotating relative to the nut body 11 when the attached part 2 is attached to the nut 1, the portion of the nut body 11 that forms the anti-seat surface portion 11c has a rectangular plate shape. That is, as shown in Figures 1 and 2, the attached part 2 is formed with a pair of wall portions 2b that extend opposite each other from the flange 2a toward the anti-seat surface portion 11c, and the pair of wall portions 2b of the attached part 2 are arranged to sandwich the rectangular anti-seat surface portion 11c of the nut body 11, thereby forming a rotation prevention device for the nut 1 and the attached part 2.

[0040] The radially central portion of the seating surface portion 11b is made up of a metal portion 111. As a result, when the fastened member 4 is fastened between the nut 1 and the bolt 3 (hereinafter referred to as the fastened state), the seating surface portion 11b is in metal contact with the fastened member 4 made of metal, thereby enabling good fastening force to be exerted. In order to ensure that the contact area between the metal portion 111 and the fastened member 4 on the seating surface portion 11b is as large as possible, the metal portion 111 has a shape that expands radially outward on the seating surface portion 11b.

[0041] The radially outer peripheral portion of the seating surface portion 11b is made up of a resin portion 112. A seating surface protrusion 112a that protrudes in the axial direction is formed on the portion of the seating surface portion 11b made up of the resin portion 112. The seating surface protrusion 112a is formed in an annular shape. The seating surface protrusion 112a is a seating surface-side water-stopping portion that exhibits water-stopping performance (i.e., the ability to prevent water from entering from the outside) between the nut 1 and the fastened member 4 in the fastened state. Because the seating surface protrusion 112a is made of resin, the seating surface protrusion 112a is in close contact with the fastened member 4 in the fastened state, allowing it to exhibit good water-stopping performance.

[0042] A radially central portion of anti-seat surface portion 11c is made up of a metal portion 111. A radially outer peripheral portion of anti-seat surface portion 11c is made up of a resin portion 112. The bolt accommodating member 12 is welded to the portion of anti-seat surface portion 11c made up of resin portion 112.

[0043] The bolt accommodating member 12 is a member that forms a bolt accommodating space 12a for accommodating the portion of the male threaded portion 3a of the bolt 3 that protrudes from the nut main body portion 11, and has a tubular portion 121, a blocking portion 122, and a flange portion 123.

[0044] The cylindrical portion 121 has a cylindrical shape extending in the axial direction of the female thread 11a. The cylindrical portion 121 is arranged coaxially with the female thread 11a. The axial length of the cylindrical portion 121 is set according to the length of the bolt 3 (i.e., the length of the portion of the male thread portion 3a of the bolt 3 that protrudes from the nut body portion 11). The closing portion 122 closes the end of the cylindrical portion 121 on the opposite side to the nut body portion 11 (hereinafter referred to as the tip side). The flange portion 123 has an annular shape that expands radially outward from the end of the cylindrical portion 121 on the nut body portion 11 side (hereinafter referred to as the base side).

[0045] The bolt accommodating member 12 is welded at the flange portion 123 to the portion of the anti-seat portion 11c that is configured by the resin portion 112. The flange portion 123 is an anti-seat side watertight portion that exhibits watertight performance between the bolt accommodating member 12 and the nut body portion 11.

[0046] The blocking portion 122 is formed with a recess 124 having a shape recessed from the bolt accommodating space 12a side toward the tip side of the bolt accommodating member 12. The recess 124 is a circular recess formed coaxially with the cylindrical portion 121 on the inner surface of the bolt accommodating member 12. The inner diameter of the recess 124 is the same as the inner diameter of the female thread 11a of the nut body 11. The recess 124 is a recess used to position the bolt accommodating member 12 coaxially with respect to the nut body 11 when the bolt accommodating member 12 is welded to the nut body 11.

[0047] 2. Nut 1 manufacturing process The manufacturing process (in other words, manufacturing method) of the nut 1 will be described with reference to Figures 5, 6, 7, and 8. As shown in Figure 5, the manufacturing process S100 of the nut 1 is broadly divided into a nut body forming process S110, a bolt receiving member forming process S120, and a joining process S130.

[0048] In the nut body molding step S110, the nut body 11 is molded. That is, the nut body 11 consisting of the metal part 111 and the resin part 112 is integrally molded by injection molding. Specifically, the nut body molding step S110 includes a metal part molding step S111 and an insert molding step S112. In the metal part molding step S111, the metal part 111 is molded. In the insert molding step S112, the metal part 111 molded in the metal part molding step S111 is insert molded to form the resin part 112, thereby molding the nut body 11. In the bolt receiving member molding step S120, the bolt receiving member 12 is integrally molded. The bolt accommodating member forming process S120 does not necessarily have to be performed after the nut body portion forming process S110; the bolt accommodating member forming process S120 may be performed before the nut body portion forming process S110, or the bolt accommodating member forming process S120 and the nut body portion forming process S110 may be performed in parallel.

[0049] In the joining step S130, the bolt receiving member 12 formed in the bolt receiving member forming step S120 is joined to the nut body 11 formed in the nut body forming step S110. In the joining step S130, first, the nut body 11 is set in a jig 100 as shown in FIG. 6. Specifically, the nut body 11 is set in the jig 100 so that a positioning pin 101 provided on the jig 100 is inserted into the female thread 11a of the nut body 11. The outer diameter of the positioning pin 101 is approximately the same as the inner diameter of the female thread 11a of the nut body 11. The axial length of the positioning pin 101 is set according to the axial lengths of the nut body 11 and the bolt receiving member 12.

[0050] Next, the bolt receiving member 12 is set on the nut body 11. At this time, as shown in Fig. 7, the tip of the positioning pin 101 is inserted into the recess 124 of the bolt receiving member 12, thereby positioning the bolt receiving member 12 coaxially with the nut body 11.

[0051] Here, a joining protrusion 123a is formed on the flange portion 123 of the bolt accommodation member 12 in a standalone state. The joining protrusion 123a protrudes toward a portion of the anti-seat surface portion 11c of the nut body 11 that is configured by the resin portion 112. The joining protrusion 123a is formed in an annular shape around the entire circumference of the flange portion 123. When the bolt accommodation member 12 is set on the nut body 11, the joining protrusion 123a of the bolt accommodation member 12 abuts against a portion of the anti-seat surface portion 11c of the nut body 11 that is configured by the resin portion 112. The annular joining protrusions 123a may be formed by stacking multiple protrusions in the radial direction of the flange portion 123. That is, multiple (multiple) joining protrusions 123a may be formed in an annular shape around the entire circumference. The joining protrusions 123a may be multiple point-like protrusions arranged in an annular shape around the entire circumference of the flange portion 123.

[0052] Next, the bolt receiving member 12 is joined to the nut body 11. Specifically, as shown in Fig. 8, the tip surface 102a of the vibrator 102 of the ultrasonic welding device is brought into contact with the flange portion 123 of the bolt receiving member 12, and ultrasonic vibration is applied while applying pressure toward the nut body 11 (the downward side in Fig. 8), thereby welding and joining the bolt receiving member 12 to the portion of the anti-seat surface portion 11c of the nut body 11 that is made up of the resin portion 112. At this time, a deformation prevention tool 103 is inserted into the groove portion 11d of the nut body 11 to prevent the resin portion 112 of the nut body 11 from being deformed by the pressure from the vibrator 102.

[0053] The portion of vibrator 102 on the side of tip surface 102a (the portion that abuts against flange portion 123 of bolt holding member 12) is formed in a cylindrical shape to avoid interference with bolt holding member 12. The inner diameter and outer diameter of the cylindrical portion of vibrator 102 are set according to the inner diameter and outer diameter of flange portion 123 of bolt holding member 12. Tip surface 102a of vibrator 102 is formed in an annular shape so as to abut against the entire flange portion 123 of bolt holding member 12.

[0054] Here, the bolt accommodating member 12 is welded to the nut body 11 at the joining protrusion 123a. Because the joining protrusion 123a is formed in an annular shape around the entire circumference of the flange portion 123, the bolt accommodating member 12 is welded to the nut body 11 around the entire circumference at the joining protrusion 123a. The bolt accommodating member 12 is welded with only the joining protrusion 123a in contact with the nut body 11, so the bolt accommodating member 12 is welded with a small contact area between the bolt accommodating member 12 and the nut body 11. Therefore, the bolt accommodating member 12 is reliably welded to the nut body 11.

[0055] In the nut 1 manufactured in this manner, the bolt accommodating member 12 is welded to the nut body 11, so that waterproofing performance can be achieved between the bolt accommodating member 12 and the nut body 11.

[0056] In the ideal welding state, the joining protrusion 123a would be completely melted and crushed, as in the nut 1 shown in Figures 1 and 4, but in an actual welding state, it is possible that part of the joining protrusion 123a will not be completely crushed and will remain.

[0057] 3. Effects According to the nut 1 of this embodiment, the bolt receiving member 12 can prevent water from entering between the female thread 11a and the male thread 3a, and by forming the groove 11d from resin, molding can be made easier and the weight can be reduced compared to when the groove 11d is formed from metal, and by forming the female thread 11a from metal, fastening performance can be improved compared to when the female thread 11a is formed from resin. Furthermore, since the bolt receiving member 12 has a flange portion 123, water can be further prevented from entering between the female thread 11a and the male thread 3a and joining the bolt receiving member 12 and the resin portion 112 can be made easier.

[0058] According to the nut 1 of this embodiment, the flange portion 123 is joined to the resin portion 112 over the entire periphery, and therefore the water-stopping properties of the flange portion 123 can be improved.

[0059] According to the nut 1 of this embodiment, the inner surface at the tip of the bolt accommodating member 12 is formed with a recess 124 that is recessed coaxially with the female thread 11a, so that in the process of joining the bolt accommodating member 12 to the resin part 112, the bolt accommodating member 12 can be positioned coaxially with the female thread 11a by inserting the positioning pin 101 into the recess 124. Therefore, the bolt accommodating member 12 can be joined to the resin part 112 with high precision.

[0060] According to the nut 1 of this embodiment, the flange portion 123 is joined to the resin portion 112 at the joining protrusions 123a, so that the flange portion 123 can be joined to the resin portion 112 reliably.

[0061] According to the nut 1 of this embodiment, the seat protrusion 112a is formed in the portion of the resin part 112 that constitutes the seat portion 11b, and the seat protrusion 112a can prevent water from entering between the nut 1 and the fastened member 4.

[0062] According to the nut 1 of this embodiment, the metal portion 111 constitutes a part of the seating surface portion 11b, and therefore, compared to when the seating surface portion 11b is entirely constituted by the resin portion 112, the fastening performance can be improved.

[0063] According to the manufacturing process S100 of the nut 1 in this embodiment, the manufacturing process includes a nut body molding process S110 for molding the nut body 11 consisting of a metal part 111 and a resin part 112, a bolt accommodating member molding process S120 for molding the bolt accommodating member 12, and a joining process S130 for joining the bolt accommodating member 12 formed in the bolt accommodating member molding process S120 to the resin part 112 of the nut body 11 formed in the nut body body molding process S110, so that the nut 1 can be easily manufactured.

[0064] According to the manufacturing process S100 of the nut 1 in this embodiment, in the joining process S130, the bolt accommodating member 12 is joined to the resin part 112 in a state where the bolt accommodating member 12 is positioned relative to the nut main body part 11 by inserting the positioning pin 101 into the female thread 11a and the recess 124, so that the nut 1 can be manufactured with high precision.

[0065] (Other embodiments) In the above embodiment, ultrasonic welding is used as the joining method in the joining step S130, but the joining method in the joining step S130 is not limited to ultrasonic welding. For example, various joining methods such as heat welding, laser welding, and adhesive bonding can be used as the joining method in the joining step S130.

[0066] In the above embodiment, the joining protrusion 123a is formed on the flange portion 123 of the bolt accommodation member 12 in a standalone state, and the bolt accommodation member 12 is welded and joined to the nut body 11 at the joining protrusion 123a. Conversely, the joining protrusion may be formed on the nut body 11. Specifically, a joining protrusion that protrudes toward the flange portion 123 of the bolt accommodation member 12 may be formed on a portion of the anti-seat surface portion 11c of the nut body 11 that is configured by the resin portion 112, and the nut body 11 and the bolt accommodation member 12 may be joined to each other at the joining protrusion.

[0067] In the above embodiment, the groove 11d of the nut 1 extends in a direction perpendicular to the axial direction of the female thread 11a, but the groove 11d may extend in a direction non-parallel to the axial direction of the female thread 11a. In this case, when the attached part 2 is attached to the nut 1, the flange 2a of the attached part 2 is slidably inserted into the groove 11d of the nut 1 in a direction non-parallel to the axial direction of the female thread 11a.

[0068] In the above embodiment, the portion of the nut 1 that constitutes the counter-seat portion 11c has a rectangular plate shape, but it is not limited to a rectangular shape and may have any shape that can prevent the attached part 2 from rotating relative to the nut body 11. In other words, it may have various non-circular shapes that correspond to the shape of the attached part 2.

[0069] In the above embodiment, recess 124 of bolt receiving member 12 is circular, but this is not limited to this and may have any shape as long as it allows positioning of bolt receiving member 12 by positioning pin 101. For example, if the tip of positioning pin 101 has a polygonal shape, recess 124 may also have a corresponding polygonal shape.

[0070] In the above embodiment, the nut body 11 is formed by integrally molding the metal part 111 and the resin part 112 by injection molding, but the molding method of the nut body 11 is not limited to injection molding. For example, the molding method of the nut body 11 may be press-fit molding, in which the metal part 111 is press-fitted into the resin part 112.

[0071] In the above embodiment, the nut 1 is used when attaching interior and exterior parts to the body of an automobile, but the nut 1 is not limited to this and can be used for various purposes. [Explanation of symbols]

[0072] 1 nut 2 Mounting parts 3 Volts 3a Male thread 4 Parts to be fastened 11 Nut body 11a female thread 11b Seat part 11d Groove 111 Metal Part 112 Resin part 112a Bearing surface protrusion 12 Bolt receiving member 121 Cylindrical part 123 Flange 123a Joint protrusion 124 recess

Claims

1. a metal portion (111) formed of metal and forming a female thread (11a); a resin portion (112) formed of resin and provided on the outer periphery of the metal portion, the resin portion (112) being formed in a groove shape and forming a groove portion (11d) into which the attached part (2) is inserted in a direction non-parallel to the axial direction of the female thread; a bolt receiving member (12) formed of resin and configured to receive a portion of the male thread portion (3 a) of the bolt (3) that is screwed into the female thread and that protrudes from the metal portion; The bolt receiving member is A cylindrical portion (121) having a cylindrical shape extending in the axial direction of the female thread; The nut (1) has a flange portion (123) that has a shape that expands radially outward from the end of the cylindrical portion on the resin portion side and is joined to the resin portion.

2. The nut according to claim 1 , wherein the flange portion is joined to the resin portion over the entire periphery.

3. 2. The nut according to claim 1, wherein a recess (124) having a shape recessed coaxially with the female thread is formed on an inner surface of the end of the bolt accommodating member opposite the resin portion.

4. a joining protrusion (123a) is formed on one of the flange portion and the resin portion, protruding toward the other of the flange portion and the resin portion; The nut according to claim 1 , wherein the flange portion and the resin portion are joined to each other at the joining projection.

5. The end of the resin portion opposite to the bolt accommodating member forms a seat portion (11b) that abuts against the fastened member (4), 5. The nut according to claim 1, wherein a seat projection (112a) that projects annularly in the axial direction is formed in a portion of the resin portion that constitutes the seat portion.

6. 5. The nut according to claim 1, wherein an end of the metal portion opposite the bolt accommodating member forms a seat portion (11b) that abuts against a fastened member (4).

7. a metal portion (111) formed of metal and forming a female thread (11a); a resin portion (112) formed of resin and provided on the outer periphery of the metal portion, forming a groove portion (11d) having a groove-like shape into which the attached part (2) is inserted in a direction non-parallel to the axial direction of the female thread; a bolt receiving member (12) formed of resin, which receives a portion of the male thread portion (3 a) of the bolt (3) that screws into the female thread and protrudes from the metal portion, and which is joined to the resin portion; The nut (1) has a recess (124) formed on the inner surface of the bolt accommodating member at the end opposite the metal portion, the recess (124) being coaxial with the female thread.

8. a metal portion (111) formed of metal and forming a female thread (11a); a resin portion (112) formed of resin and provided on the outer periphery of the metal portion, forming a groove portion (11d) having a groove-like shape into which the attached part (2) is inserted in a direction non-parallel to the axial direction of the female thread; The metal part and the resin part constitute a seat part (11b) that comes into contact with a fastened member (4), The nut (1), wherein a seat projection (112a) that projects annularly in the axial direction is formed in a portion of the resin portion that constitutes the seat portion (11b).

9. A manufacturing method for manufacturing the nut according to claim 1, A nut body molding process (S110) for molding a nut body (11) consisting of the metal part and the resin part; a bolt receiving member forming step (S120) of forming the bolt receiving member; a joining step (S130) of joining the bolt accommodating member molded in the bolt accommodating member molding step to the resin portion of the nut body molded in the nut body molding step.

10. A manufacturing method for manufacturing the nut according to claim 7, A nut body molding process (S110) for molding a nut body (11) consisting of the metal part and the resin part; a bolt receiving member forming step (S120) of forming the bolt receiving member; A joining process (S130) of joining the bolt accommodating member molded in the bolt accommodating member molding process to the resin portion of the nut body molded in the nut body molding process, In the joining step (S100), a positioning pin (101) is inserted into the female thread and the recess to position the bolt accommodating member relative to the nut body, and then the bolt accommodating member is joined to the resin part.

Images