Band spring bolt

Abstract

The present invention relates to a band spring bolt in which a bolt is inserted into a hole of a profile having a square tube shape and having elongated holes drilled at regular intervals to fix a fastener, wherein a band spring washer made of a thin spring plate is inserted at the bottom of the bolt portion of the bolt, so that when the head portion of the bolt is inserted into the hole and rotated halfway, the band spring washer is compressed and elastically pressed against the bottom surface of the hole, thereby ensuring that the nut is fixed in a state where the bolt does not fall out of or detach from the hole. The present invention is achieved by fitting a dish-shaped band spring washer to the lower side of the bolt portion of a T-shaped bolt, wherein the band spring washer is made of a thin spring plate and is supported by elasticity when pushed toward the head portion, and a protruding neck is formed in the fitting hole formed in the center of the band spring washer to protrude toward the head portion.

Description

Technology Field

[0001] The present invention relates to a band spring bolt in which a bolt is inserted into a hole of a profile having a square tube shape and having a groove-shaped hole drilled at regular intervals to fix a fastener, wherein a spring band washer made of a thin spring plate is inserted at the bottom of the bolt portion of the bolt, so that when the head portion of the bolt is inserted into the hole and rotated halfway, the band spring washer is compressed and elastically pressed against the bottom surface of the hole, thereby ensuring that the nut is fixed in a state where the bolt does not fall out of or detach from the hole. Background Technology

[0002] Generally, to fix panels such as stone, a profile made of steel square tubes is assembled in a grid shape on the exterior wall or slab of a building, and then a fastener for fixing the panel is fixed using a T-shaped bolt in a perforated hole formed in the profile. As shown in FIG. 1, the bolt portion (8) of a T-shaped bolt (5) is held in the profile (1) in which perforated holes (2) that are relatively longer than the width are formed at regular intervals along the longitudinal direction, and the head portion (6) is inserted into the perforated hole (2). Then, the head portion (6) is rotated halfway so that the T-shaped bolt (5) does not come off, and then the fastener (4) is inserted into the bolt portion (8) and the nut (3) is tightened to fix the fastener (4).

[0003] The T-shaped bolt (5) for such a profile (1) is composed of a rectangular head portion (6) that is inserted into a hole (2), a square bolt neck (7) that protrudes at a certain height from the center of the head portion (6) and is inserted between the holes (2) to prevent rotation, and a bolt portion (8) that is formed protruding from the center of the bolt neck (7) and into which a nut (3) is inserted. After the head portion (6) is inserted into the hole (2), it is positioned at a position perpendicular to the hole (2) by half rotation so that it is not detached to the outside. After the head portion (6) is rotated, the bolt neck (7) is inserted between the holes (2) and the nut (3) is inserted into the bolt portion (8) and tightened, thereby maintaining a fixed state without rotating together with the nut (3), so that the fixing of the nut (3) is completed.

[0004] In the above-described fixing method, when inserting the head portion (6) of the T-shaped bolt (5) into the perforated hole (2) of the profile (1), it is easy for it to be pushed inward or come out, so the work must be performed while holding the bolt portion (8) with concentration.

[0005] A T-shaped bolt for solving these problems is described in Patent Registration No. 10-2555985 (July 11, 2023), which comprises a spring that pushes the head of the T-shaped bolt located at one end by means of elastic support force, a through hole into which the body of the T-shaped bolt is inserted so as to be rotatable and retractable, a front covering portion that is positioned over the front surface of the periphery of the insertion hole of the fixture, and a spring support portion that supports the other end of the spring so that the head of the T-shaped bolt tends to advance toward the front covering portion by means of the elastic support force of the spring. However, this method is difficult to manufacture, and assembling the spring and the self-supporting member is not easy. In particular, there is a problem in that the worker experiences difficulty in installing it by inserting it into the perforated hole of the profile. Prior art literature

[0006] [Reference 1] Patent Registration No. 10-2555985 (Published July 18, 2023) [Reference 2] Patent Registration No. 10-2547017 (Published June 26, 2023) [Reference 3] Patent Registration No. 10-2742800 (Published December 16, 2024) [Reference 4] Patent Registration No. 10-1921006 (Published November 21, 2018) The problem to be solved

[0007] The present invention aims to solve the problem of the T-shaped bolt slipping out into the inner side of the profile during the process of inserting it into the hole of the profile to secure a fastener for fixing a structure when using a T-shaped bolt that is inserted into the hole of the profile, as well as the problem of structural complexity and the difficulty of the worker inserting and securing it into the hole during actual use when using a T-shaped bolt equipped with a spring and a self-securing member as disclosed in Patent Registration No. 10-2555985. By inserting a band spring washer made of a thin spring plate into the bolt neck of the T-shaped bolt, the head of the T-shaped bolt can be simply secured without slipping out or detaching into the hole of the profile when inserted into the hole, thereby eliminating the difficulty of bolt manufacturing and enabling convenient use. means of solving the problem

[0008] The present invention is achieved by fitting a dish-shaped band spring washer to the lower side of the bolt portion of a T-shaped bolt, wherein the band spring washer is made of a thin spring plate and is supported by elasticity when pushed toward the head portion, and a protruding neck is formed in the fitting hole formed in the center of the band spring washer so as to protrude toward the head portion. The band spring washer is fitted to the lower side of the bolt portion of the T-shaped bolt, and the band spring washer forms a protruding neck that protrudes toward the head portion.

[0009] Here, the band spring washer is formed in a dish shape and has a fitting hole formed in the center so as to be fitted into the lower side of the bolt portion of the T-shaped bolt, and the protruding neck is made to protrude toward the head portion, but the length of the protruding neck is made longer than the screw pitch of the bolt portion so that the spring washer does not move along the screw of the bolt portion.

[0010] Unlike the above, where the protruding neck of the band spring washer protrudes toward the head portion, it can be made to protrude toward the bolt portion, and the length of the protruding neck is made longer than the screw pitch of the bolt portion.

[0011] The band spring washer of the present invention can be manufactured in various shapes such as square, circular, or sunflower shapes, and there is no difference in function or effect due to the difference in shape. The band spring washer has a dish shape in which the center protrudes upward from the side, and in the center, a fitting hole is formed to be inserted into the lower side of the bolt part, and a protruding neck is formed around the fitting hole facing toward the head part.

[0012] The T-shaped bolt of the present invention comprises a straight head portion, a bolt neck protruding in a square shape from the lower center of the head portion, and a bolt portion protruding from the center of the bolt neck and having a screw formed thereon. By ensuring that a screw is not partially formed between the bolt neck and the lower side of the bolt portion, a band spring washer is fitted into the lower side of the bolt portion and can move while allowing free rotation. The T-shaped bolt of the present invention can be used as a square bolt in which the head portion is circular.

[0013] In the T-shaped bolt of the present invention, a band spring washer is fitted while the threads of the bolt portion are not formed, and then the bolt portion is rolled into a screw shape to form the threads. As a result, the lower diameter of the spring washer is narrower than the diameter of the portion where the threads are formed, so the band spring washer fitted to the lower side of the bolt portion is maintained in a state where it does not detach.

[0014] The bolt neck of the present invention is formed in a square shape and is inserted into a perforated hole to prevent rotation in the direction of rotation of the nut. The square bolt neck forms rounded portions in opposing directions, thereby allowing the bolt neck to be easily rotated halfway by the rounded portions when rotated in a perpendicular direction while inserted between the perforated holes. The rounded portions are formed in a direction that facilitates rotation of the T-shaped bolt to the right.

[0015] In the present invention, a guide line indicating the direction of the head part is formed at the tip of the bolt part to allow the direction of the head part to be confirmed by looking at the guide line while the head part is inserted into the drilled hole, or a guide groove is formed diagonally on the bolt neck so that the direction of the head part can be confirmed by looking at the guide groove from the outside. Effects of the invention

[0016] The present invention solves the problem of the T-shaped bolt slipping inward or coming loose when a fastener is fixed by inserting a T-shaped bolt into a hole in a profile, while also solving the problem of adding a complex structure to prevent the T-shaped bolt from slipping out of the hole in the profile. By inserting a countersunk band spring washer on the lower side of the bolt portion of the T-shaped bolt, when the T-shaped bolt is inserted into the hole, the T-shaped bolt is rolled so that the band spring washer is compressed and receives elasticity, and then rotated halfway so that the head portion is supported in the hole. When the force is released, the T-shaped bolt is fixed with the bolt neck inserted between the holes. In this state, a fastener can be inserted into the bolt portion and then fixed using a nut. During this process, the band spring washer is compressed so that the fastener adheres to the surface of the profile and is fixed, thus providing the effect that anyone can easily complete the work with a simple structure. Brief explanation of the drawing

[0017] Figure 1 is an explanatory diagram of the fastening state of a conventional T-shaped bolt. FIG. 2 is a perspective view of a T-shaped bolt equipped with a band spring washer of the present invention before fastening. FIG. 3 is a perspective view of a T-shaped bolt equipped with a band spring washer of the present invention after fastening. FIG. 4 is a flowchart of the process of fastening the band spring washer of the present invention to a T-shaped bolt. FIG. 5 is another embodiment of FIG. 4 of the present invention FIG. 6 is a state diagram showing the state in which the T-shaped bolt of the present invention is fixed. FIG. 7 is a diagram showing another embodiment of the band spring washer of the present invention. FIG. 8 is a side view of a T-shaped bolt fitted with a band spring washer of the present invention. FIG. 9 is a perspective view of the band spring washer of the present invention. FIG. 10 is a perspective view of another embodiment of the band spring washer of the present invention. FIGS. 11 to 15 are flowcharts of the usage states of the present invention Specific details for implementing the invention

[0018] The present invention allows for the convenient implementation of a structure fixing fastener by using a simple structure when inserting a T-shaped bolt into a perforated hole of a profile, thereby preventing the T-shaped bolt from slipping inward or outward when inserted into the perforated hole. By inserting a countersunk band spring washer below the bolt portion of the T-shaped bolt, when inserting the T-shaped bolt, the band spring washer is compressed. When the head portion is inserted into the perforated hole and the T-shaped bolt is rotated halfway and the compression is removed, the T-shaped bolt maintains a fixed state due to the elastic force of the band spring washer while the bolt neck of the T-shaped bolt is inserted into the perforated hole. In this state, when a fastener and a nut are inserted into the bolt portion and the nut is tightened, the band spring washer is compressed and the nut is tightened, thereby achieving a secure fixation of the fastener.

[0019] The present invention enables simple and reliable operation using a simple T-shaped bolt fitted with a band spring washer. The present invention will be described in detail below with reference to the exemplary drawings.

[0020] The present invention is formed by fitting a dish-shaped band spring washer (10) to the lower side of the bolt portion (8) of a T-shaped bolt (5) as shown in FIG. 8, wherein the band spring washer (10) is made of a thin spring plate and has a dish shape in which the inner side is higher than the outer side, and a fitting hole (11) is formed in the center of the band spring washer (10), and a protruding neck (12) that protrudes inwardly from the band spring washer (10) is formed at a certain height around the fitting hole (11) as shown in FIG. 9.

[0021] Since the band spring washer (10) is formed in a dish shape with a protruding center, it receives elastic force when the center is pushed downward while the outer side of the band spring washer (10) is supported, and a fitting hole (11) into which the lower side of the bolt part (8) is fitted is formed in the center of the band spring washer (10), and a protruding neck (12) is formed around the fitting hole (11) of the band spring washer (10) by means of burring or compression banding, and the protruding neck (12) has a certain height, and the length (L) of the protruding neck (12) is formed longer than the screw pitch (P) of the bolt part (8), so that the band spring washer (10) does not move along the screw of the bolt part (8).

[0022] Here, the protruding neck (12) of the band spring washer (10) can be manufactured in a shape that protrudes toward the bolt portion (8) as shown in FIG. 10, and there is no difference in effect due to the difference in the direction of protrusion of the protruding neck (12).

[0023] As shown in FIG. 4, the T-shaped bolt (5) of the present invention is formed by inserting the bolt part (8) without screws into the fitting hole (11) of the spring washer (10) in a straight state without screws formed on the bolt part (8), and then forming screws by rolling the straight bolt part (8) into a screw-shaped mold. By not forming screws on the lower side of the bolt part (8) for a certain distance, the band spring washer (10) is inserted and can move for a certain distance.

[0024] Here, the diameter of the bolt part (8) in a state where no screw is formed has a width that can be fitted into the fitting hole (11) of the band spring washer (10), and the diameter of the bolt part (8) in a state where a screw is formed becomes larger than the diameter of the fitting hole (11), so the band spring washer (10) rotates and moves while fitted to the lower side of the bolt part (8), but is prevented from coming off.

[0025] The above bolt neck (7) is formed in a square shape and is inserted into the perforated hole (2) to prevent rotation in the direction of rotation of the nut (3). Although the square bolt neck (7) is basically formed to have a square shape, by forming a rounded portion (7a) in a direction opposite to each other, when the bolt neck (7) is inserted between the perforated holes (11) and rotated in a right direction, it can be easily rotated by the rounded portion (7a). This rounded portion (7a) is formed in a direction that facilitates rotation of the T-shaped bolt (5) to the right.

[0026] The T-shaped bolt (5) of the present invention is formed such that a square bolt neck (7) protrudes from the center of a straight head portion (6), and a bolt portion (8) protrudes from the center of the bolt neck (7). A certain length of the lower side of the bolt portion (8) is not formed with a screw, and a band spring washer (10) is fitted therein. The length (L) of the protruding neck (12) formed in the center of the band spring washer (10) is made longer than the screw pitch (P) of the bolt portion (8), while the diameter of the bolt portion (8) with the screw formed is larger than the diameter of the fitting hole (11), so that the band spring washer (10) does not slide off along the bolt portion (8).

[0027] As shown in FIG. 7, the band spring washer (10) of the present invention can be manufactured with a head portion (6) in various shapes such as straight, square, circular, or sunflower shapes. In cases where the head portion (6) of the T-shaped bolt (5) is not straight but is circular or elliptical, the perforation hole (2) does not form an elongated groove shape, and a perforation similar to the shape of the head portion (6) must be made so that the head portion (6) of various shapes can be fitted into one side of the perforation hole (2).

[0028] The present invention forms a guide line (8a) indicating the direction of the head portion (6) at the tip of the bolt portion (8) of a T-shaped bolt (5), so that when the head portion (6) is inserted into the perforated hole (2) of the profile and the shape of the head portion (6) cannot be seen from the outside, the direction of the head portion (6) can be confirmed by looking at the guide line (8a) formed at the tip of the bolt portion (8) to enable accurate half-rotation, or forms a guide groove (7b) at the square corner portion of the bolt neck (7), wherein the guide groove (7b) is formed in a diagonal direction so that when the head portion (6) is covered by a band spring washer (10) and cannot be seen, the direction of the head portion (6) can be confirmed by using the guide groove (7b) visible from the side.

[0029] The present invention comprises a band spring washer (10) made of a thin spring plate and having a dish shape with the inner side higher than the outer side, wherein a fitting hole (11) is formed in the center, and a protruding neck (12) is formed at a certain height around the fitting hole (11) and protrudes inwardly from the band spring washer (10), and a T-shaped bolt (5) having a straight shape with a head part (6) and a bolt neck (7) and no screw formed in the bolt part (8), and then the fitting hole (11) of the band spring washer (10) is fitted into the straight bolt part (8) of the T-shaped bolt (5) with the protruding neck (12) facing the head part (6), and in this state, the straight bolt part (8) is rolled into a screw-shaped mold to form a screw.

[0030] Here, the protruding neck (12) protruding inwardly from the band spring washer (10) can form a protruding neck (12a) protruding outwardly from the band spring washer (10) at a certain height, and there is no difference in effect due to the difference in direction of the protruding neck (12)(12a).

[0031] The above bolt part (8) does not have a screw formed at a certain distance on its lower side, and the lower side of the bolt part (8) is smaller than the diameter of the fitting hole (11), but the diameter of the part of the bolt part (8) where the screw is formed is larger than the diameter of the fitting hole (11), so that the spring washer (10) fitted on the lower side of the bolt part (8) rotates and moves while fitted on the lower side of the bolt part (8), but is prevented from coming off through the bolt part (8).

[0032] The present invention is a method for firmly fixing a fastener (4) to the outside of a profile (1) using a T-shaped bolt (5) fitted with a band spring washer (10). As shown in FIGS. 11 to 15, the head portion (6) of the T-shaped bolt (5) is first inserted into a groove-shaped perforated hole (2). When force is applied by pressing from the bolt portion (8) toward the head portion (6), the spring washer (10) is compressed against the surface of the profile (1) and receives elasticity. At the same time, the head portion (6) and the bolt neck (7) are inserted inward through the perforated hole (2), and then twisted halfway. When no force is applied, the bottom surface of the head portion (6) is pressed against the inner surface of the profile (1) by the elastic force of the band spring washer (10), while the bolt neck (7) is inserted between the perforated holes (2).

[0033] Here, since the head portion (6) of the T-shaped bolt (5) is inserted into the perforated hole (2) of the profile (1) and the shape of the head portion (6) cannot be checked from the outside, the direction of the head portion (6) is checked by looking at the indicator line (8a) formed on the tip of the bolt portion (8) or by looking at the indicator groove (7b) of the bolt neck (7) so that an accurate half-rotation is achieved.

[0034] In this way, when the bottom surface of the head part (6) is in close contact with the inner surface of the profile (1) due to the elastic force of the band spring washer (10), the T-shaped bolt (5) remains fixed without moving, so the fastener (4) is easily inserted into the bolt part (8), and then the nut (3) is inserted and the nut (3) is tightened, and the nut (3) compresses the band spring washer (10) to ensure a firm fixation of the fastener (4).

[0035] Here, the bolt neck (7) of the T-shaped bolt (5) is inserted between the perforated holes (2) so that rotation does not occur, and is temporarily fixed by the band spring washer (10), so the fastener (4) and nut (5) can be easily inserted and tightened.

[0036] When the nut (3) is tightened firmly, the band spring washer (10) is compressed into a straight shape and the fastener (4) is fixed, so the T-shaped bolt (5) is easily fixed without any detachment or loosening during the fastening process and without rotation.

[0037] Therefore, since the present invention uses a T-shaped bolt (5) fitted with a band spring washer (10), it can be manufactured with a simple configuration, and since temporary fixing is easily achieved using the elasticity of the band spring washer (10), simple fixing work can be performed.

[0038] The band spring washer (10) of the present invention can be manufactured in various shapes such as straight, square, circular, and sunflower shapes, and when the head portion (6) of the T-shaped bolt (5) is not straight but circular or elliptical, the perforated hole (2) is not formed in the shape of an elongated groove, and the perforated hole (2) must be perforated in a shape similar to the shape of the head portion (6) so that the head portion (6) can be fitted into the perforated hole (2). Explanation of the symbols

[0039] 1 : Profile 2 : Perforation hole 3 : Nut 4 : Fastener 5 : T-shaped bolt 6 : Head part 7 : Bolt neck 8 : Bolt part 10: Band spring washer 11: Insertion hole 12,12a : Protruding neck

Claims

Claim 1 In fixing the fastener (4) with a T-shaped bolt (5) and a nut (3) in a perforated hole (2) formed in the profile (1), the fitting hole (11) formed in a dish-shaped band spring washer (10) is fitted below the bolt portion (8) of the T-shaped bolt (5), wherein the band spring washer (10) is made of a thin spring plate and is supported by elasticity when pushed toward the head portion (6), and when the head portion (6) of the T-shaped bolt (5) is fitted into the perforated hole (2) and rotated halfway, the head portion (6) is pressed against the bottom surface of the perforated hole (2) by the elastic force of the band spring washer (10), thereby maintaining the fixed state so that the T-shaped bolt (5) does not fall out of or detach from the perforated hole (2), and a protruding neck (12) protruding toward the head portion (6) of the T-shaped bolt (5) is formed around the fitting hole (11) formed in the center of the band spring washer (10). A band spring bolt characterized in that the diameter of the fitting hole (11) is formed to be larger than the diameter of the part of the bolt portion (8) where the screw is not formed, and smaller than the diameter of the part of the bolt portion (8) where the screw is formed, so that the band spring washer (10) maintains a state in which it does not detach from the T-shaped bolt (5). Claim 2 A band spring bolt according to claim 1, characterized in that the T-shaped bolt (5) is fitted into the fitting hole (11) of the band spring washer (10) while the bolt portion (8) is not having a screw formed therein, with the central protruding part of the band spring washer (10) facing upward, and then the bolt portion (8) is rolled into a screw shape to form a screw. Claim 3 A band spring bolt according to claim 1, characterized in that a protruding neck (12a) protruding toward the bolt portion (8) is formed around a fitting hole (11) formed in the center of the band spring washer (10). Claim 4 delete Claim 5 A band spring bolt according to claim 1 or 3, characterized in that the length (L) of the protruding neck (12)(12a) of the band spring washer (10) is formed longer than the pitch (P) of the screw formed in the bolt portion (8) of the T-shaped bolt (5), so that the band spring washer (10) does not move along the screw of the bolt portion (8). Claim 6 A band spring bolt according to claim 1, characterized in that the head portion (6) of the T-shaped bolt (5) is formed in a square, circular, elliptical, or dish shape, and the perforated hole (2) of the profile (1) is formed in a shape such that the head portion (6) can be inserted to one side. Claim 7 A band spring bolt according to claim 1, characterized in that the band spring washer (10) is formed in the shape of a plate, square, circle, ellipse, or sunflower. Claim 8 A band spring bolt according to claim 1, wherein the bolt neck (7) of the T-shaped bolt (5) has a square shape, but the opposite corners form rounded portions (7a), so that when the bolt neck (7) is inserted into the perforated hole (2), it rotates halfway along the rounded portions (7a). Claim 9 A band spring bolt according to claim 1, characterized in that the bolt neck (7) of the T-shaped bolt (5) is formed in a square shape and is inserted between the perforated holes (2) of the profile (1) to prevent rotation. Claim 10 A band spring bolt characterized in that, in the first paragraph, a guide line (8a) is formed at the tip of the bolt portion (8) of the T-shaped bolt (5) in accordance with the direction of the head portion (6), so that the direction of the head portion (6) inserted into the drilled hole (2) can be confirmed by looking at the guide line (8a).

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