One-way fastener

Abstract

A one-way fastener configured to be externally inserted and coupled is proposed, which opens a closed interior toward a through-hole provided in a fixing device, and includes a deformable sleeve and a pressurizing sleeve which are fitted to a fastener body, a pressurizing ring configured to be fitted on the fastener body exposed through the pressurizing sleeve, and a pressurizing member coupled to the fastener body exposed through the pressurizing ring by a screw type engagement. Accordingly, when any one surface among corresponding side surfaces of the fixing device is located in a closed space and thus a bolt and a nut cannot be fastened, the one-way fastener can be easily fixed from an open surface of the fixing device toward the closed space surface.

Description

Technical Field

[0001] The present disclosure relates to a one-way fastener that can be easily fastened from an open surface of a fixture toward a closed space surface when any one of corresponding side surfaces of the fixture is located in a closed space and thus a bolt and a nut cannot be fastened. Background Art

[0002] Typically, methods for coupling the fixtures include welding, riveting, and bolting methods.

[0003] Welding is a permanent joining method in which one fixture and another are melted at high temperature and then bonded together through a cooling process. Riveting and bolting are non-permanent joining methods. In riveting, each fixture is provided with a through-hole, and a rivet is inserted into the through-hole and compressed using a press, causing the rivet end to plastically deform, making the one fixture and the other inseparable. In bolting, each fixture is provided with a through-hole, and a bolt is inserted into the through-hole and tightened with a nut, making the one fixture and the other removable.

[0004] The bolt connection is completed by inserting a bolt body having a bolt head and external threads into a fixture and a through-hole provided in the fixture so that the external threads are exposed, and then the bolt head is hung on the through-hole and a nut having internal threads is inserted into the external threads. The connection or fixed state is maintained by the process of combining and tightening the bolt and nut.

[0005] Yet this bolt connection is only possible under the state that both sides of each fixture are open. Under the state that one side is closed, that is, when the operator's hand or tool are difficult to enter, there is the problem that operation is impossible.

[0006] In order to solve this problem, Korean Patent No. 10-1743074 (registration date: May 29, 2017) proposes a one-way bolt fastening structure. In the proposed bolt fastening structure, the feasibility of bolt fastening is improved by allowing the folding washer to unfold by its own force after passing through the fastening hole of the fastening member, wherein the folding washer is constructed to be folded in half by an elastic thin plate attached to the inner folding surface that contacts each face of the fastening member among the two surfaces. However, since the operator must hold the folding washer in half with one hand so that the folded state is maintained, and must use the other hand to push the entry rod into the fastening hole of the fastening member, the entry work of the one-way bolt and the washer and the tightening work of the nut cannot be linked. In addition, there is a problem that the use of power tools is not effective.

[0007] Furthermore, there is a problem in that, when the nut is tightened, the one-way bolt idles along with the rotation of the nut and is not completely tightened. Summary of the Invention

[0008] Technical issues

[0009] The one-way fastener of the present invention makes it easy for an operator to tighten the fastener with one hand, and prevents the fastener from rotating in the rotation direction of the pressing member by the spline shaft when tightening the pressing member. In addition, the one-way fastener of the present invention improves workability by preventing the spline shaft from separating from the end of the fastener body and protruding after tightening is completed.

[0010] Technical Solution

[0011] In the present disclosure, a one-way fastener A is configured to be inserted and connected from the outside, the one-way fastener leading to a closed interior toward a through hole H provided in a fixing device F, the one-way fastener including: a deformable sleeve 20 and a pressurizing sleeve 30, the deformable sleeve 20 and the pressurizing sleeve 30 being assembled to a fastener body 10; a pressurizing ring 40, the pressurizing ring being configured to be assembled on the fastener body 10 exposed through the pressurizing sleeve 30; and a pressurizing member 50, the pressurizing member being coupled to the fastener body 10 exposed through the pressurizing ring 40 by a spiral joint.

[0012] In addition, the fastener body 10 includes: a pressing head 120, which is provided at the rear of the fastener shaft 110; an external thread 130, which has a predetermined length and is provided in front of the fastener shaft 110; and a spline shaft 140, which is configured to be cut along a perforated annular groove 141 when a certain limit or greater torque is applied to the end of the external thread 130.

[0013] In addition, the pressing head 120 of the fastener body 10 includes a pressing head ring 121, which is provided on the outer periphery of the fastener shaft 110 and faces the outer periphery of the pressing head 120. Shape construction.

[0014] In addition, the deformable sleeve 20 includes: an external deformable guide groove 211, which is arranged at a position spaced inwardly by a predetermined distance from each of the opposite ends of the outer periphery of the cylindrical deformable sleeve body 210; and an internal deformable guide groove 212, which is arranged at a position spaced inwardly by a predetermined distance from the opposite ends of the inner periphery of the deformable sleeve body 210.

[0015] In addition, the inner deformable guide groove 212 of the deformable sleeve 20 is Shape construction.

[0016] The deformable sleeve 20 includes an insertion guide 220 having an expanded shape at one end of the inner circumference of the cylindrical deformable sleeve body 210 .

[0017] The deformable sleeve 20 is configured to have the same diameter as that of the pressurizing sleeve 30 and to have lower strength than that of the pressurizing sleeve 30 .

[0018] The pressurizing ring 40 has an inner diameter that is the same as that of the pressurizing sleeve 30 , and an outer diameter that is larger than an edge of the pressurizing member 50 .

[0019] The pressurizing member 50 is provided with an internal thread 501 having a predetermined length and configured to penetrate the pressurizing member 50 , and a tool coupling portion 502 having a polygonal shape on the outside.

[0020] The inner deformable guide groove 212 of the deformable sleeve 20 is shape configuration, and a curved guide line 213 is provided at a point where the inclination is changed.

[0021] In the best embodiment, a one-way fastener A is configured to be inserted and coupled from the outside, the one-way fastener leading to a closed interior toward a through hole H provided in a fixing device F, the one-way fastener comprising: a deformable sleeve 20 and a pressurizing sleeve 30, the deformable sleeve 20 and the pressurizing sleeve 30 being configured to be assembled to a fastener body 10; a pressurizing ring 40, the pressurizing ring being configured to be assembled on the fastener body 10 exposed through the pressurizing sleeve 30; and a pressurizing member 50, the pressurizing member being coupled to the fastener body 10 exposed through the pressurizing ring 40 by a spiral engagement, wherein the fastener body 10 comprises: a pressurizing head 120, the pressurizing head being provided at the rear of a fastener shaft 110; and an external thread 130, the external thread having a predetermined length and being provided in front of the fastener shaft 110, wherein the pressurizing member 50 is connected to the fastener body 10 exposed through the pressurizing ring 40 by a spiral engagement, A pressing head ring 121 shaped toward the outer periphery of the pressing head 120 is provided on the outer periphery of the fastener shaft 110 of the pressing head 120 of the fastener body 10; a slit-shaped outer deformable guide groove 211 is provided at a position spaced inwardly by a predetermined distance from each of the ends opposite to the outer periphery of the cylindrical deformable sleeve body 210 of the deformable sleeve 20; and an equilateral outer deformable guide groove 211 is provided. An internal deformable guide groove 212 of a shape structure is arranged at the inner periphery of the deformable sleeve body 210, wherein the thickness of the deformable sleeve 20 of the internal deformable guide groove 212 is gradually formed to be thinner until the center bending line of the internal deformable guide groove 212, and on one side of the internal deformable guide groove 212, a side bending guide line 213 with an inclined start is formed on the inner peripheral surface at the position of the external deformable guide groove 211 formed at the one side, and on the opposite side of the internal deformable guide groove 212, an opposite side bending guide line 213 with an inclined end is formed on the inner peripheral surface at a position spaced outwardly from the opposite external deformable guide groove 211 by a predetermined distance.

[0022] Beneficial effects

[0023] According to the present disclosure, after the fastener body having a deformable sleeve and a pressurizing sleeve is inserted through a through-hole provided in a fixing device, the deformable sleeve placed in a closed space is expanded during the process of connecting the pressurizing member through a spiral joint, thereby achieving the effect of being easily fixed and connected even in a surface at a closed space.

[0024] In addition, there is an effect that an operator can easily fasten the fastener using one hand.

[0025] Furthermore, when the pressing member is fastened, there is an effect of preventing the fastener body from rotating in the rotation direction of the pressing member by the spline shaft.

[0026] Furthermore, by allowing the spline shaft to be cut and separated from the end of the fastener body after the fastener is tightened, it is possible to prevent a portion of the fastener body from being excessively exposed to the outside of the pressing member.

[0027] This can achieve an effect of improving feasibility. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a perspective view showing a one-way fastener and a fixing device separated from each other according to the present disclosure;

[0029] Figure 2 is a perspective view showing separate views of the interior and exterior of a one-way fastener according to the present disclosure;

[0030] Figure 3 is a longitudinal cross-sectional view showing an isolated one-way fastener according to the present disclosure;

[0031] Figure 4 is a longitudinal sectional view showing a one-way fastener according to the present disclosure;

[0032] Figures 5a to 5dis a longitudinal sectional view showing a process in which the one-way fastener is coupled to the fixing device according to the present disclosure. DETAILED DESCRIPTION

[0033] Embodiments of the present disclosure will be described below with reference to the accompanying drawings.

[0034] Figure 1 is a perspective view showing a one-way fastener and a fixing device separated from each other according to the present disclosure, Figure 2 is a perspective view showing separate views of the inside and the outside of a one-way fastener according to the present disclosure, Figure 3 is a longitudinal sectional view showing an isolated one-way fastener according to the present disclosure, Figure 4 is a longitudinal sectional view showing a one-way fastener according to the present disclosure, Figures 5a to 5d is a longitudinal sectional view showing a process in which the one-way fastener is coupled to the fixing device according to the present disclosure.

[0035] The one-way fastener A of the present disclosure is configured to prevent a portion of the fastener from protruding to the outside while facilitating fastening to a fixing device F having a closed space surface by an operator using one hand, as Figures 1 to 4 indicated, and the one-way fastener A is configured to be inserted and coupled from the outside, the one-way fastener A opening a closed interior toward a through-hole H provided in the fixing device F.

[0036] Such a fastener A includes a fastener body 10, a deformable sleeve 20, a pressurizing sleeve 30, a pressurizing ring 40, and a pressurizing member 50. The deformable sleeve 20 and the pressurizing sleeve 30 are sequentially fitted to the fastener body 10. The pressurizing ring 40 is configured to be fitted on the fastener body 10 exposed through the pressurizing sleeve 30, and the pressurizing member 50 is coupled to the fastener body 10 exposed through the pressurizing ring 40 by a screw-type engagement.

[0037] Here, the cylindrical fastener body 10 is made of a steel material of a predetermined length, and is provided with a pressurizing head 120 having a diameter greater than that of the fastener shaft 110 at a rear portion of the fastener shaft 110, an external thread 130 having a predetermined length at a front of the fastener shaft 110, and an annular groove 141 having a perforated shape at an end portion of the external thread 130 to have a spline shaft. When a certain limit or greater torque by a pneumatic tool (not shown in the drawing) is applied to the end portion of the external thread 130, the spline shaft 140 is configured to be cut along the perforated annular groove 141.

[0038] During operation, such a spline shaft 140 can prevent rotation along the rotation of the pressurizing member 50 as a state of being inserted into a head of a pneumatic tool (not shown in the drawing).

[0039] The pressing head 120 is positioned in the closed space and is pulled by the tightening force or tension of the pressing member 50. By this pressure, the deformable sleeve 20 is configured to expand in a direction perpendicular to the axial direction of the fastener shaft 110 and to be compressed in the axial direction at the same time. The shape of the pressing head ring 121 prevents the inner periphery of the end side of the middle deformable sleeve 20, which faces the pressing head 120, from expanding outward, and can be pressed against the outer periphery of the fastener shaft 110. That is, when strong pressure is applied, the end of the pressing head 120 can be prevented from being inserted into the inner periphery of the deformed deformable sleeve 20.

[0040] The cylindrical deformable sleeve 20 is made of steel, so when strong pressure is applied in the axial direction, the middle portion expands outward in the form of a disk (ring), thus providing the same function as a rivet. The outer deformable guide groove 211 is positioned a predetermined distance from each of the opposing ends of the outer periphery of the cylindrical deformable sleeve body 210, enabling expansion deformation around the outer deformable guide groove 211. When an axial load acts concentratedly on the outer deformable guide groove 211, it prevents other components from being deformed in advance.

[0041] Furthermore, when the inner deformable guide groove 212 is provided at a position spaced inwardly by a predetermined distance from the opposite end of the inner periphery of the deformable sleeve body 210, an overlapping disk or annular shape is formed by the inner deformable guide groove 212. The shape is constructed by bending or extending outward in the same direction through the curved portion of the upper portion having a small cross-sectional area.

[0042] As the insertion guide 220 having a shape expanded at one end of the inner periphery of the cylindrical deformable sleeve body 210, such a deformable sleeve 20 can prevent interference during the process of coupling to the fastener shaft 110. At this time, it is preferable that the deformable sleeve 20 is configured to have the same diameter as that of the pressurizing sleeve 30 and have a lower strength than that of the pressurizing sleeve 30 so that elastic deformation can be easily performed.

[0043] The pressurizing ring 40 does not allow the pressing force of the pressurizing member 50 to act directly on the pressurizing sleeve. Instead, the pressurizing ring 40 provides a complex function of allowing the pressing force of the pressurizing member 50 to act on the pressurizing ring 40 to prevent damage due to friction on the surface of the fixture F during the tightening process, firstly, to increase the cross-sectional area so that sufficient pressing force can be applied, and to prevent the pressurizing member 50 from loosening in the opposite direction after being tightened.

[0044] Since the pressurizing ring 40 is configured to have the same inner diameter as that of the pressurizing sleeve 30 and to have an outer diameter greater than the edge of the pressurizing member 50 , the pressing force of the pressurizing member 50 can be transmitted in the axial direction.

[0045] The pressurizing member 50 enables the deformable sleeve 20 to be deformed by the pressing force generated by pulling the fastener shaft 110 of the fastener body 10 in the axial direction, and the pressurizing member 50 is provided with an internal thread 501 having a predetermined length passing through the pressurizing member 50, and a tool connecting portion 502 having a polygonal shape on the outside is provided through the pressurizing member 50.

[0046] On the other hand, the inner deformable guide groove 212 provided on the inner periphery of the deformable sleeve 20 is constructed to have a simple shape so that it is deformed by a load applied in the axial direction However, the inner deformable guide groove 212 provided on the inner periphery of the deformable sleeve 20 is preferably provided with a bending guide line 213 from the point where the inclination is changed to a shape other than the shape to the opposite end, and in this case, it is more preferable that the elastic deformation of the bend is initially started at a specific position by the bending guide line 213, and the elastic deformation with full bending can be performed while the initial elastic deformation gradually increases. Deformation of shape.

[0047] This is because the pressing force due to the uniform deformation of the deformable sleeve 20 is transmitted from the pressing member 50 through the fastener shaft 110 of the fastener body 10 and is equally applied to the deformable sleeve 20. Thus, a uniform tightening force or coupling force is maintained as a whole, so that the coupling or fixing state is stably maintained.

[0048] Figures 5a to 5d is a longitudinal sectional view illustrating a process in which a one-way fastener is coupled to a fixing device according to the present disclosure.

[0049] First, if Figure 5a As shown in FIG, in the process of coupling three separate fixtures F with the through hole H in the center into one, one side of the fixture F is an open space, and the other side of the fixture is a closed space that workers' hands and tools cannot enter.

[0050] In the one-way fastener A of the present disclosure, the deformable sleeve 20 and the pressurizing sleeve 30 are assembled to the fastener shaft 110 of the fastener body 10 , and then the internal thread 501 of the pressurizing member 50 is coupled to the external thread 130 in a state where the pressurizing ring 40 is assembled.

[0051] Next, if Figure 5b As shown, the other side of the press ring 40 is inserted until it contacts the surface of the fixing means F in the process of inserting the press head 120 of the fastener body 10 through the through hole H.

[0052] Then, in the process of rotating the press member 50 using a pneumatic tool (not shown in the figure), the head of the pneumatic tool is coupled to the spline shaft 140, and only the press member 50 is rotated while preventing the fastener body 10 from rotating.

[0053] Thereafter, as Figure 5c shown, while the press member 50 is rotated, when the external thread 130 moves from right to left and the press head ring 121 of the press head 120 compresses the other end of the deformable sleeve 20 in one direction, the outer deformable guide groove 211 and the inner deformable guide groove 212 of the deformable sleeve body 210 expand outward while the length is shortened in the axial direction.

[0054] Next, as Figure 5d shown, as the press member 50 continues to rotate, the external thread 130 is pulled in the axial direction, and the deformable sleeve 20 is simultaneously coupled in a full shape through the press head 120. Thereafter, when a certain limit or greater torque is applied to the end of the external thread 130 by the pneumatic tool (not shown in the figure), the spline shaft 140 is configured to be cut along the perforated annular groove 141.

[0055] [Description of reference numerals]

[0056] 10: fastener body, 20: deformable sleeve

[0057] 30: press sleeve, 40: press ring

[0058] 50: press member, 110: fastener shaft

[0059] 120: press head, 121: press head ring

[0060] 130: external thread, 140: spline shaft

[0061] 141: perforated annular groove, 210: deformable sleeve body

[0062] 211: outer deformable guide groove, 212: inner deformable guide groove

Claims

1. A one-way fastener (A), configured to be inserted and coupled from the outside, the one-way fastener leading to a closed interior toward a through hole (H) provided in a fixing device (F), the one-way fastener comprising: a deformable sleeve (20) and a pressurizing sleeve (30), the deformable sleeve (20) and the pressurizing sleeve (30) being configured to be assembled to the fastener body (10); a press ring (40) configured to fit over the fastener body (10) exposed through the press sleeve (30); as well as a pressurizing member (50) coupled to the fastener body (10) exposed through the pressurizing ring (40) through a screw-type engagement, Wherein, the fastener body (10) comprises: a pressing head (120) disposed at a rear portion of the fastener shaft (110); and an external thread (130) having a predetermined length and disposed in front of the fastener shaft (110), Among them, A pressing head ring (121) shaped toward the outer periphery of the pressing head (120) is provided on the outer periphery of the fastener shaft (110) of the pressing head (120) of the fastener body (10); A slit-shaped outer deformable guide groove (211) is provided at a position spaced inwardly by a predetermined distance from each of the ends opposite to the outer periphery of the cylindrical deformable sleeve body (210) of the deformable sleeve (20); and Equilateral An inner deformable guide groove (212) of a shape structure is provided at the inner periphery of the deformable sleeve body (210), wherein the thickness of the deformable sleeve (20) of the internal deformable guide groove (212) is formed to gradually become thinner until the central bending line of the internal deformable guide groove (212), and on one side of the internal deformable guide groove (212), a side bending guide line (213) starting from an inclination is formed on the inner peripheral surface at a position of the external deformable guide groove (211) formed at the one side, and on the opposite side of the internal deformable guide groove (212), an opposite side bending guide line (213) having an inclined end is formed on the inner peripheral surface at a position spaced outwardly from the opposite external deformable guide groove (211) by a predetermined distance.

2. The one-way fastener (A) according to claim 1, wherein The fastener body (10) comprises: A spline shaft (140) is configured to be cut along a perforated annular groove (141) when a certain limit or more of torque is applied to an end of the external thread (130).

Images