Mounting fastener and mounting method using the same

Abstract

The present invention relates to a mounting fastener and a mounting method using the same, which are used when fastening work is performed only on one side of a panel to be worked on, such as when mounting exterior parts on a vehicle body. The invention comprises: a jack nut, which is an injection-molded resin product having an insertion body portion formed integrally, which is formed to extend through a mounting hole of the panel and has a bolt insertion passage penetrating from front to back and has a rear end divided into upper and lower parts by a cut line formed on the left and right sides, and a pair of flange portions formed integrally, which are formed extending outward from the rear end of the insertion body portion and are in contact with the panel surrounding the mounting hole to provide surface contact support; and a nut provided from the rear end of the jack nut. The jack nut is installed with a head portion pressed into the front end of the bolt insertion passage, and a shank portion protruding from the rear end of the bolt insertion passage is screw-coupled with the nut. When the nut is rotated in the fastening direction, the head portion moves backward along the bolt insertion passage, pushing the rear end of the insertion body portion outward, causing the pair of flange portions to spread vertically, thereby ensuring a secure connection to the mounting hole. When an external force is applied forward through the shank portion, the head portion moves forward along the bolt insertion passage. As a result, not only can the mounting be securely fastened to the panel, but the mounting and the mounting fastener can also be easily removed.

Description

Technology Field

[0001] The present invention relates to a mounting fastener used when fastening work is performed only on one side of a panel to be worked on, such as when mounting exterior parts to a vehicle body, and a mounting method using the same. Background Technology

[0002] Generally, when attaching accessories to the vehicle body, such as when installing side steps on an SUV, fastening work must be performed only on the outer side of the body panel due to structural limitations or for work efficiency; the fastening component used in this case is a mounting fastener, commonly referred to as a push nut.

[0003] A typical conventional mounting fastener is structured such that, as shown in FIG. 1, a mounting hole (11) is formed in a panel (10) such as a vehicle body and a metal square clip (110) is inserted, and as shown in FIG. 2, a bolt (20) is fastened with a mounting member (30) in between, thereby causing the internal metal square nut (120) to come out to the outside (left) and the fixing rib (112) to spread radially and be fixed in the mounting hole (11).

[0004] However, if one wishes to remove the square clip (110) fixed to the mounting hole (11) in this manner, the metal square clip (110) must be forcibly pulled so that the fixing rib (112) contracts inward into the hole (11) to remove it; in this process, there is a high risk that the panel (10) around the mounting hole (11) may be deformed or damaged. Furthermore, the disadvantage that the square clip (110) cannot be easily removed in this manner has been a common problem pointed out regarding other conventional mounting fasteners as well.

[0005] Meanwhile, in an attempt to solve these problems, the invention disclosed in Patent No. 10-2141902 (August 6, 2020) proposed a push nut that expands outward by contracting in the axial direction when the bolt is fastened and contracts inward by extending in the axial direction when the bolt is released. However, in order for such free deformation to occur, the push nut must be manufactured using a synthetic resin of a relatively soft material. In this case, sufficient fastening strength cannot be guaranteed, so it is insufficient to support heavy loads of 100 kg or more. Furthermore, if the fastened bolt gradually loosens due to causes such as vehicle body vibration, the push nut contracts inward accordingly, causing the fastening part to become loose.

[0007] [Prior Art Literature]

[0008] Utility Model Registration No. 20-0467331 (June 7, 2013)

[0009] Patent Publication No. 10-2022-0169004 (December 26, 2022)

[0010] Patent No. 10-2645787 (March 11, 2024)

[0011] Patent No. 10-0562578 (March 22, 2006)

[0012] Patent Publication No. 10-2022-0144729 (October 27, 2022)

[0013] Patent Publication No. 10-2015-0117049 (October 19, 2015) The problem to be solved

[0015] Accordingly, the objective of the present invention is to provide a mounting fastener that can ensure a secure connection while also being easy to remove, and a mounting method using the same. means of solving the problem

[0016] To achieve the above objective, the present invention relates to a mounting fastener that is fastened to a mounting hole of a panel to be mounted, comprising: a jack nut which is an injection-molded resin product having an insertion body portion formed to extend through the mounting hole, having a bolt insertion passage formed through the interior in the front and rear directions, and whose rear end portion is divided vertically by a cut line formed on the left and right sides; a pair of flange portions integrally formed to extend outward from the rear end of the insertion body portion and contact and support the panel surrounding the mounting hole; and a nut provided from the rear end of the jack nut. The present invention provides a mounting fastener characterized by including a bolt in which a head portion is pressed into the front end of the bolt insertion passage of the jack nut, and a shank portion protruding from the rear end of the bolt insertion passage is screw-coupled with the nut, and when the nut is rotated in the fastening direction, the head portion is moved rearward along the bolt insertion passage and pushes the rear end of the insertion body portion outward, thereby causing the pair of flange portions to spread up and down so as to be firmly coupled to the mounting hole, and when an external force is applied forward through the shank portion, the head portion is moved forward along the bolt insertion passage.

[0017] In addition, to achieve the above objective, the present invention provides a mounting method using the mounting fastener, comprising the steps of: inserting the insertion body portion of the jack nut into the mounting hole of the panel and supporting the pair of flange portions in surface contact with the panel surrounding the mounting hole; stacking the surface of an exterior product on the panel with the pair of flange portions in between and protruding the shank portion of the bolt through the surface of the exterior product; screwing a nut onto the shank portion; and rotating the nut in the fastening direction so that the head portion of the bolt is moved backward along the bolt transfer passage, thereby causing the pair of flange portions to spread vertically and be firmly connected to the mounting hole.

[0018] Here, the mounting method may further include the steps of: completely releasing the screw connection to the bolt by rotating the nut in the release direction and then removing the exterior part; striking the shank portion of the bolt forward so that the head portion is moved forward along the bolt insertion passage through the shank portion; and removing the jack nut by pulling the insertion body portion out of the mounting hole while the pair of flange portions are closed. Effects of the invention

[0019] As described above, according to the mounting fastener and mounting method using the same of the present invention, by forming a bolt transfer passage inside a jack nut made of injection-molded resin and pressing the head portion of a bolt into it, when a nut is fastened to the bolt, the head portion is moved backward, thereby causing the jack nut to spread outward, so that it can be firmly coupled to the mounting hole of a panel. In addition, when releasing the fastening, the jack nut can be easily removed by striking the shank portion of the bolt forward while the nut is loosened, thereby causing the head portion to move forward. Brief explanation of the drawing

[0020] FIG. 1 is an exploded perspective view illustrating the usage state of a mounting fastener according to the prior art. FIG. 2 is a cross-sectional view illustrating the coupling structure of the mounting fastener of FIG. 1. FIG. 3 is a perspective view, front view, and left and right side views of a jack nut, which is a component of a mounting fastener according to an embodiment of the present invention. FIGS. 4 to 8 are step-by-step perspective views and cross-sectional views for explaining a mounting method using a mounting fastener according to an embodiment of the present invention, FIG. 9 is a perspective view illustrating a modified example of a jack nut according to an embodiment of the present invention. FIGS. 10 and FIGS. 11 are step-by-step perspective and side views illustrating a mounting release method using a mounting fastener according to an embodiment of the present invention. Specific details for implementing the invention

[0021] A mounting fastener according to an embodiment of the present invention includes a jack nut (200) as shown in FIG. 3. The jack nut (200) is a plastic injection-molded product and has an insertion body portion (210) that extends in the front-rear direction and a flange portion (220) that extends outward from the rear end of the insertion body portion (210).

[0022] Referring to FIG. 4, the insertion body part (210) has a bolt insertion passage (211) formed to penetrate the front and rear.

[0023] Additionally, as shown in FIG. 3, the insertion body part (210) has a rear end part (214) that is divided into upper and lower parts by having an incision line (213) formed on the left and right sides extended to the rear end, and a flange part (220) that extends outward from the rear end of the insertion body part (210) is provided as an upper and lower pair.

[0024] As shown in FIGS. 3 and 4, the head portion (401) of the bolt (400) is installed in a press-fit state at the front end of the bolt insertion passage (211), and the shank portion (402) of the bolt (400) passes through the bolt insertion passage (211) and protrudes from the rear end. To install the bolt (400) with this structure, it can be achieved by pressing the bolt (400) into the injection-molded product of the jack nut (200). The bolt (400) with the head portion (401) pressed in cannot be smoothly transported along the bolt insertion passage (211), and as described later, it may be transported to the rear (right) by the rotation of the nut screwed therein, or it may be transported to the front (left) by striking the shank portion (402) protruding to the rear with a hammer or the like.

[0025] In addition, the mounting fastener according to an embodiment of the present invention includes a nut (300 in FIG. 6) provided from the rear end of the jack nut (200) and screwed into the shank portion (402) of the bolt (400).

[0026] To explain the mounting method using the mounting fastener configured as described above, first, as shown in FIG. 4, the insertion body part (210) of the jack nut (200) is inserted into the mounting hole (11) of the panel (10) to be mounted, and a pair of flange parts (220) formed at the rear end are brought into contact with the panel (10) around the mounting hole (11) as shown in FIG. 5, thereby providing surface contact support.

[0027] At this time, as shown in FIGS. 4 and 5, a locking projection (215) is formed protruding from the outer surface with a gap equal to the thickness of the panel (10) between the rear end of the insertion body part (210) and a pair of flange parts (220). As the locking projection (215) comes into contact with the edge of the hole (11) and is pressed inward during the process of passing through the mounting hole (11), the rear end part (214), which is divided into upper and lower parts of the insertion body part (210), is elastically deformed and contracts and then expands again, and a structure can be achieved in which the mounting hole (11) is stably interposed between the locking projection (215) and a pair of flange parts (220).

[0028] Then, a plate surface (41) of an exterior product (40) is laminated on the panel (10) with a pair of flange portions (220) in between, as shown in FIG. 6, such that the bolt (400) side shank portion (402) protrudes through the hole (41a) of the plate surface (41).

[0029] Then, as shown in FIGS. 6 and 7, a nut (300) is screwed onto the protruding shank portion (402). During this process, the nut (300) comes into contact with the exterior part (40) as shown in FIG. 7.

[0030] Then, when the nut (300) is further rotated in the direction of fastening with the bolt (400), the head portion (401) is moved backward along the pressed-in bolt insertion passage (211) as shown in FIG. 8, thereby applying a force that causes the upper and lower pair of flange portions (220) to spread apart vertically. As a result, the pair of flange portions (220) are firmly connected to the mounting hole (11). And, through this connection, the exterior part (40) can also be firmly fixed to the panel (10).

[0031] Meanwhile, although the head portion (401) of the bolt inserted into the jack nut (200) in FIG. 3 is described as being hexagonal, the present invention is not limited to this shape and may be formed as a circular or square head portion. In addition, since the shape of the insertion body portion (210) of the jack nut (200) can be formed in various ways depending on the shape of the mounting hole (11) on the panel (10) side to be mounted, the insertion body portion (210') may be molded to have a square cross-section as shown in FIG. 9.

[0032] Additionally, the insertion body part (210) may have a pair of opposing outer surfaces formed as tapered surfaces so that it can be inserted more smoothly into the mounting hole (11). Alternatively, all outer surfaces may be formed as tapered surfaces.

[0033] Meanwhile, as shown in FIG. 8, in order to remove the exterior part (40) and mounting fasteners (200, 300, 400) that have been fastened to the panel (10), first the nut (300) is rotated in the unfastening direction to completely separate it from the shank part (402), and then the exterior part (40) is removed.

[0034] Then, by striking the protruding shank portion (402) with a hammer or the like in the direction of the arrow forward (left), the head portion (401) is moved forward (left) along the bolt insertion passage (211) through the shank portion (402). As a result, a pair of flange portions (220) that were firmly coupled to the mounting hole (11) by being pressed outward by the head portion (401) are made to be in a state where elastic deformation is possible, causing them to contract inward or at least contract inward.

[0035] Finally, the jack nut (200) is removed from the mounting hole (11) by using nippers or long-nose pliers to squeeze and pull out the pair of flange portions (220) that are loosely connected to the mounting hole (11) due to the forward movement of the head portion (401), as shown by the arrow in FIG. 11.

[0036] Meanwhile, the mounting fastener and the mounting method using the same described above are merely examples for understanding the present invention, and therefore the scope of rights or technical scope of the present invention as defined by the claims set forth below should not be interpreted as being limited to what has been described above. Explanation of the symbols

[0037] 10: Panel 11: Mounting hole 40: Exterior part 41: (Interior) panel surface 42: (Outer) Plate Surface 200: Jack Nut 210: Insertion body part 211: Bolt insertion passage 213: Incision line 214: Posterior end 215: Locking projection 220: Flange portion 300: Nut 400: Bolt 401: Head section 402: Shank section

Claims

Claim 1 A mounting fastener that is fastened to a mounting hole of a panel to be mounted, comprising: a jack nut which is an injection-molded resin product integrally formed with an insertion body portion that is extended to pass through the mounting hole, has a bolt insertion passage formed penetrating from front to back inside, and has a rear end divided vertically by a cut line formed on the left and right sides, and a pair of flange portions that are extended outwardly from the rear end of the insertion body portion and are supported in surface contact by abutting the panel surrounding the mounting hole; a nut provided from the rear end of the jack nut; and a shank portion protruding from the rear end of the bolt insertion passage installed in a state where a head portion is pressed into the front end of the bolt insertion passage of the jack nut and screw-coupled with the nut, wherein when the nut is rotated in the fastening direction, the head portion is moved rearward along the bolt insertion passage, pushing the rear end of the insertion body portion outward to make it adhere to the mounting hole, and at the same time, the pair of flange portions spread vertically. A mounting fastener characterized by including a bolt that is firmly coupled to the mounting hole, and which is transported forward along the bolt insertion passage while releasing the close contact between the head part and the mounting hole at the rear end of the insertion body part when an external force is applied forward through the shank part. Claim 2 A mounting method using a mounting fastener of claim 1, comprising the steps of: inserting the insertion body portion of the jack nut into the mounting hole of the panel and supporting the pair of flange portions in surface contact with the panel surrounding the mounting hole; stacking the surface of an exterior product on the panel with the pair of flange portions in between and protruding the shank portion of the bolt through the surface of the exterior product; screwing a nut onto the shank portion; and rotating the nut in the fastening direction so that the head portion of the bolt is moved backward along the bolt insertion passage, thereby causing the pair of flange portions to spread vertically and be firmly coupled to the mounting hole. Claim 3 A mounting method according to claim 2, further comprising the steps of: completely releasing the screw connection to the bolt by rotating the nut in the release direction and then removing the exterior part; striking the shank portion of the bolt forward so that the head portion is moved forward along the bolt insertion passage through the shank portion; and removing the jack nut by pulling the insertion body portion out of the mounting hole while the pair of flange portions are closed.

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