Anti-loosening nut with manual loosening function and clamp equipped with same

Abstract

An anti-loosening nut having a manual loosening function according to the present invention is an anti-loosening nut in which a helical coil spring is installed in a nut portion, wherein the nut portion comprises: a threaded region portion having a thread formed in a predetermined range on the upstream side on the inner circumferential surface thereof; a non-threaded region portion which is a region in which no thread is formed on the downstream side from the threaded region portion and which has an inner diameter larger than that of the threaded region portion; a stepped portion formed at a boundary between the threaded region portion and the non-threaded region portion; and a stopper portion formed on the wall surface of the non-threaded region portion in contact with the stepped portion, and wherein: the helical coil spring comprises a helical winding portion disposed in the non-threaded region portion, and a downstream end bent portion bent from the helical winding portion outward in the radial direction of the helical coil spring; the helical coil spring further comprises a control wire portion extending from an end of the downstream end bent portion; and the nut portion further comprises a control wire engagement portion formed at a distal end of the non-threaded region portion.

Description

A locking nut having a manual release function and a clamp having the same

[0001] The present invention relates to a locking nut having a manual release function and a clamp having the same, and more particularly, to a locking nut having a manual release function and a clamp having the same, which can reliably perform a locking action in a state where fastening is completed and can quickly and easily perform a release operation through a simple manual operation when fastening is required.

[0002] Typically, pipes (or hoses) used to transport fluids such as liquids or gases have flanges installed at both ends for connection. These flanges are connected to the flanges of adjacent pipes by clamps. In other words, clamps are used to securely fasten two flanges in contact with each other.

[0003] For example, a clamp for a pipe is proposed, disclosed in Korean Patent Registration No. 10-2162858.

[0004] Referring to Fig. 1, a conventional pipe clamp is provided with a first body part (10) and a second body part (20) in a semicircular ring shape that are hinged to surround a flange of a pipe, and a first fastening part (30) and a second fastening part (40) for fastening the first body part (10) and the second body part (20) to each other.

[0005] In a conventional pipe clamp, the first body part (10) and the second body part (20) can be connected or disconnected from the flange (not shown) simply by connecting or disconnecting the first connecting part (30) and the second connecting part (40).

[0006] However, the conventional pipe clamp described above has a problem in that if the tightening state becomes loose or comes off due to rotation of the second fastening part (40) due to external factors such as vibration of the fluid flowing through the pipe, fluid force, vibration of an external mechanical device, impact, etc., a serious safety accident may occur and normal operation of the equipment, etc. may become impossible.

[0007] For example, in cases where leaks occur due to poor connection of pipes carrying highly hazardous fluids such as hydrofluoric acid and sulfuric acid, which are lethal to the human body, such as in semiconductor manufacturing facilities, chemical manufacturing and handling facilities, and gas manufacturing and handling facilities, this can result in serious industrial accidents that can result in casualties as well as enormous property damage due to downtime.

[0008] As a solution to this problem, the inventor of the present invention attempted to apply a disposable lock nut disclosed in Korean Patent Registration No. 10-1178129 as a replacement for the second fastening part (40) illustrated in FIG. 1, but the following limitations were present.

[0009] First, the disposable lock nut disclosed in the registered patent No. 10-1178129 has the disadvantage that, when the second fastening part (40) of the pipe clamp shown in Fig. 1 is replaced with a tool such as a spanner to release the tightened state, a loosening operation must be performed, which is inconvenient to use and makes it difficult to respond quickly and appropriately on site.

[0010] In addition, the disposable lock nut disclosed in registered patent No. 10-1178129 has a shape similar to that of a conventional nut with a short female thread forming portion, so it requires screw movement from the rear end to the front of the first fastening portion (30) formed with a long bolt, which requires a lot of fastening time, makes tool attachment difficult and inconvenient, and has the problem of not being able to provide stable fixing force.

[0011] In particular, the conventional lock nut with a built-in spiral coil spring cannot be separated from the bolt when fastened, so in case of an emergency such as maintenance, the lock nut must be artificially broken, making it very difficult to maintain, and not only is it difficult to reuse due to damage to the bolt, but it also has the disadvantage of damaging surrounding equipment or devices.

[0012] [Prior Art Literature]

[0013] [Patent Document]

[0014] (Patent Document 0001) Korean Patent No. 10-2162858 "Clamp for Pipe"

[0015] (Patent Document 0002) Korean Patent No. 10-1513133 "Pipe Clamp, Particularly a Profile Clamp"

[0016] (Patent Document 0003) Korean Patent No. 10-1178129 "Disposable Lock Nut"

[0017] The present invention has been proposed with the above in mind, and its purpose is to provide a loosening prevention nut having a manual loosening function that can reliably perform a loosening prevention action in a state where fastening is completed, and can quickly and easily perform a loosening action through a simple manual operation when loosening is required, and a clamp having the same.

[0018] Another object of the present invention is to provide a clamp having a loosening prevention nut with a manual loosening function that can perform clamping and unclamping operations of a connecting portion connecting pipes to each other simply and quickly, and at the same time reliably perform a loosening prevention operation in a completed fastening state.

[0019] In order to achieve the above object, the present invention provides a locking nut having a manual unlocking function, wherein a spiral coil spring is installed in a nut portion, wherein the nut portion may include a threaded area portion having threads formed in a certain range on an inner surface thereof on an upstream side in the bolt fastening direction, a non-threaded area portion having a larger inner diameter than the threaded area portion as an area where threads are not formed on a downstream side from the threaded area portion, a stepped area formed at a boundary between the threaded area portion and the non-threaded area portion, and a stopper portion formed in the non-threaded area portion in contact with the stepped area.

[0020] The above spiral coil spring is characterized in that it has a spiral winding portion that is wound in a spiral shape from the upstream end and arranged in the non-threaded area so that the bolt that is fastened to the nut portion passes through and is fastened, and a downstream end bending portion that is bent in a diameter outer direction of the spiral coil spring from the spiral winding portion, and the spiral coil spring further includes a control line portion that is extended and formed at the end of the downstream end bending portion so as to perform a binding action or a binding release action of the spiral coil spring.

[0021] The above nut portion is characterized by further including a control line engaging portion formed at the end of the non-threaded area portion so that the control line portion is engaged or released.

[0022] The above control line hooking portion may include a cutting ring body having a cut portion formed on a portion of a body protruding in a ring shape at the end of the non-screw area portion, a hooking ring recessed along the outer circumferential surface of the cutting ring body, a first hooking protrusion formed on one side of the cutting surface of the cutting ring body, and a second hooking protrusion formed on the other side of the cutting surface of the cutting ring body.

[0023] The control line portion may include a first engaging control portion extending from an end of the downstream bending portion to engage or disengage from the first engaging jaw, a control line curved portion extending from the first engaging control portion to be seated on the engaging ring, a second engaging control portion extending from an end of the control line curved portion to engage or disengage from the second engaging jaw, and a contact lever portion extending from an end of the second engaging control portion.

[0024] The above first catch control unit may be configured as a first acute-angle bending unit that is bent at an acute angle toward the catch ring at the end of the downstream bending unit.

[0025] The above second catch control part may be configured as a second acute-angle bending part that is bent at an acute angle toward the second cutting surface from the end of the control line bending part.

[0026] The above contact lever portion may extend upward from the end of the second catch control portion and may have a contact curved portion formed at the free end to make contact with a finger.

[0027] The above-mentioned cut portion may be formed in a direction opposite to the stopper portion so as to form an acute angle in the circumferential direction from the center line of the above-mentioned nut portion.

[0028] The above stopper portion is formed to protrude from the wall surface of the non-threaded area, but is positioned within the formation range of the step portion to prevent interference with the progress of the bolt.

[0029] Meanwhile, in order to achieve the above object, a clamp having a release-prevention nut having a manual release function according to the present invention is characterized by including: a clamp body in which one end of a first clamp body part and a second clamp body part are hinge-connected to each other and the other end is detachably connected to each other to form a ring shape; a fastening member having screw threads formed on an outer circumferential surface to form a male screw shape and rotatably connected to the first clamp body part; and an anti-release nut having the above-described structure configured to be fastened to the fastening member so as to fix the first clamp body part and the second clamp body part.

[0030] The above-mentioned anti-loosening nut may include a hollow rod extending in the direction of entry of the bolt into the nut portion to apply a restraining force to the second clamp body portion.

[0031] According to the present invention, a locking nut having a manual release function and a clamp having the same prevent rotation in the release direction by organic operation of a spiral coil spring built into a nut portion and a control line portion caught in a control line catch portion, thereby stably performing a locking operation, and since an intentional locking operation can be easily released from a fastened state through a simple manual operation, there is an effect of improving convenience, reliability, and marketability in use.

[0032] The clamp having a release-prevention nut with a manual release function according to the present invention prevents reverse rotation of the nut portion while the pipe is fastened, thereby preventing problems caused by accidental or unintentional loosening in advance. At the same time, in the event of maintenance or an emergency and a release operation being required, the fastening state can be conveniently released through a simple manual operation without artificially damaging the release-prevention nut portion as in the past.

[0033] Figure 1 is a drawing for explaining a conventional pipe clamp.

[0034] Figure 2 is a perspective view showing a locking nut having a manual release function according to one embodiment of the present invention.

[0035] Figure 3 is an exploded perspective view showing a locking nut having a manual release function according to one embodiment of the present invention.

[0036] Figure 4 is a cross-sectional view showing a locking nut having a manual release function according to one embodiment of the present invention.

[0037] Figure 5 is a perspective view showing a spiral coil spring having a control line portion of a release prevention nut having a manual release function according to one embodiment of the present invention.

[0038] Figure 6 is a perspective view for explaining the operation of a locking nut having a manual release function according to one embodiment of the present invention.

[0039] FIG. 7 is a drawing for explaining the operation of a release prevention nut having a manual release function according to one embodiment of the present invention, wherein a) is a drawing for explaining the state of the spiral winding part (121) of the spiral coil spring during a tightening operation of the nut part (100), and (b) is a drawing for explaining the state of the spiral winding part (121) of the spiral coil spring during a releasing operation of the nut part (100).

[0040] FIG. 8 is a perspective view for explaining the clamping state of a clamp having a release-preventing nut with a manual release function according to one embodiment of the present invention.

[0041] FIG. 9 is a perspective view for explaining the unclamping state of a clamp having a release-preventing nut with a manual release function according to one embodiment of the present invention;

[0042] Figure 10 is an exploded perspective view showing the main part of a clamp having a release-preventing nut with a manual release function according to one embodiment of the present invention.

[0043] Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the attached drawings, and identical or similar components will be described with the same reference numbers.

[0044] Meanwhile, detailed descriptions of the configurations, functions, and effects of each drawing, which can be easily understood by those of ordinary skill in the art, are briefly or omitted. Furthermore, since the present invention is characterized by a locking nut with a manual release function and a clamp equipped with the same, the relevant parts will be primarily illustrated and described, and the description of the remaining parts will be simplified or omitted.

[0045] FIG. 2 is a perspective view showing a locking nut having a manual release function according to an embodiment of the present invention, FIG. 3 is an exploded perspective view showing a locking nut having a manual release function according to an embodiment of the present invention, FIG. 4 is a cross-sectional view showing a locking nut having a manual release function according to an embodiment of the present invention, FIG. 5 is a perspective view showing a spiral coil spring having a control line portion of a locking nut having a manual release function according to an embodiment of the present invention, and FIG. 6 is a perspective view for explaining the operation of a locking nut having a manual release function according to an embodiment of the present invention, wherein a portion shown in a broken line shows a moving state of a control line portion (140) during a tightening release operation.

[0046] Referring to FIGS. 2 to 6, a loosening prevention nut (100) having a manual release function according to one embodiment of the present invention is characterized in that it can reliably perform a loosening prevention action in a state where fastening is completed, and can quickly and easily perform a loosening action through a simple manual operation when fastening is required. The nut includes a nut portion (110), a spiral coil spring (120) built into the nut portion (110), a control line engaging portion (130) formed by extending from the nut portion (110), and a control line portion (140) formed in the spiral coil spring (120).

[0047] As shown in Fig. 3, the nut part (110) has a threaded area part (112), a non-threaded area part (113), a stepped area (114), and a stopper area (115) formed on the inside of the nut body (111) with a plurality of tool contact surfaces formed around the outer surface similar to a conventional nut.

[0048] The screw thread area (112) is a configuration that means a predetermined area where screw threads are formed, and screw threads are formed to a certain extent on the upstream side, which is the entry direction when fastening the bolt (b), on the inner surface of the nut body (111). Here, the upstream side means the forward flow part where the bolt enters when fastening with the bolt (b), and may also be referred to as the bolt entry side.

[0049] The non-threaded area (113) is an area on the downstream side from the threaded area (112) where no threads are formed, and has a larger inner diameter than the threaded area. Here, the downstream side refers to the rear flow portion from which the bolt advances when fastened with a bolt, and may also be referred to as the bolt advance side.

[0050] The step portion (114) is a stepped portion formed at the boundary between the threaded area (112) and the non-threaded area (113), and is formed as a flat ring-shaped protrusion having a gap corresponding to the difference in inner diameter between the threaded area (112) and the non-threaded area (113).

[0051] The stopper portion (115) is a component formed in the non-threaded area in contact with the step portion (114), and can be configured in various ways without any special restrictions on shape or structure as long as the upstream end (122) of the spiral coil spring (120) can be caught.

[0052] For example, the stopper portion (115) is composed of a stopper (114a) that protrudes from the wall surface corresponding to the inner surface of the non-screw area portion (113) that is in contact with the step portion (114).

[0053] The stopper (114a) is a protrusion formed on the wall surface of the non-screw area (113) and is installed within the formation range (formation width) of the step portion (114) to prevent interference with the movement of the bolt (b).

[0054] The stopper (114a) is positioned a certain distance ahead of the position in the tightening direction of the bolt (or nut portion) when the upper end (122) of the spiral coil spring (120) is in a free state, and is designed to prevent interference due to the tightening operation.

[0055] And, the stopper (114a) is formed by applying force from the outside to the pin-forming part (115b) of the nut body (111) to protrude inwardly, but is not limited thereto and may be formed to protrude upwardly at the step part (114) which is the boundary between the threaded area (112) and the non-threaded area (113).

[0056] Referring to the attached drawings 5 ​​and 7, the spiral coil spring (120) is formed by winding a metal wire such as spring steel in a spiral shape, and when it rotates in the fastening direction of the nut portion (110), no contractive force is applied, so that it can rotate freely, and when it rotates in the releasing direction of the nut, a contractive force is applied, and a compressive force is applied through interaction with the screw thread (male screw thread) formed on the bolt, so that it is wound in a direction that prevents the nut from loosening.

[0057] The spiral coil spring (120) has a spiral winding portion (121) that is wound in a spiral shape from the upstream end (122) and arranged in the non-threaded area (113) so that a bolt that is fastened to the nut portion (110) passes through and is fastened, and a downstream end bend portion (123) that is bent in the outer diameter direction of the spiral coil spring from the spiral winding portion (121). Here, the term 'upstream' refers to the forward flow portion where the bolt enters when the bolt is fastened, and the upstream end may be referred to as the bolt entry end. The term 'downstream' refers to the rear flow portion where the bolt exits after entering when the bolt is fastened, and therefore the downstream end bend portion may be referred to as the bolt exit end bend portion.

[0058] The control line catch portion (130) is formed continuously at the end of the non-threaded area portion (113) of the nut body (111) so that the control line portion (140) is caught or released.

[0059] The control line hooking portion (130) comprises a cutting ring body (131) having a cut portion (a) formed on a portion of the body protruding in a ring shape at the end of the non-screw area (113), a hooking ring (132) that is recessed in a groove shape having a substantially ring shape along the outer circumference of the cutting ring body (131), a first hooking protrusion (133) formed on one side of the cutting surface (134) of the cutting ring body (131), and a second hooking protrusion (135) formed on the other side of the cutting surface (136) of the cutting ring body (131). Here, the cut portion (a) can be formed without any special restrictions as long as the binding and releasing actions of the control line portion (140) are possible. However, in the present embodiment, it is preferable that the cut portion (a) be formed at an acute angle in the circumferential direction from the center line of the nut portion (110) so that the binding and releasing actions of the control line portion (140) can be smoothly performed through numerous experiments. At this time, the formation direction of the cut portion (a) is formed in a direction opposite to the stopper portion (115).

[0060] The control line (140) is a component provided to maintain a restraining action that blocks the loosening operation of the nut or to perform a restraining release action that allows the loosening of the nut, and is integrally extended and formed at the end of the downstream bending section (123).

[0061] The control line unit (140) includes a first engaging control unit (141) extending to the end of the downstream bending portion (123) so as to be engaged or disengaged from the first engaging jaw (133), a control line curved portion (142) extending from the first engaging control unit (141) so as to be seated on the engaging ring (132), a second engaging control unit (143) extending from the end of the control line curved portion (142) so as to be engaged or disengaged from the second engaging jaw (134), and a contact lever portion (144) extending from the end of the second engaging control unit (143).

[0062] The above first hook control part (141) is composed of a first acute-angle bend part that is bent at an acute angle toward the hook ring (132) at the end of the downstream bend part (123).

[0063] The above second hook control part (143) is composed of a second acute-angle bend part that is bent at an acute angle from the end of the control line bend part (142) toward the second cutting surface (135).

[0064] The above contact lever portion (144) is bent upwardly from the end of the second catch control portion (143) so that pressure can be easily applied by a finger, and a contact bend portion (145) that comes into contact with a finger is formed at its free end.

[0065] Hereinafter, the operation of a loosening prevention nut having a manual release function according to one embodiment of the present invention will be briefly described.

[0066] The attached drawing 7 is a drawing for explaining the operation of a loosening prevention nut having a manual loosening function according to one embodiment of the present invention, (a) is a drawing for explaining the state of the spiral winding part (121) of the spiral coil spring during a tightening operation of the nut part (100), and (b) is a drawing for explaining the state of the spiral winding part (121) of the spiral coil spring during a releasing operation of the nut part (100).

[0067] Referring to part (a) of Fig. 7, a spiral coil spring (120) is built into the non-threaded area (113) of the nut portion (110), and the control line portion (140) is fixed by being caught on the control line catch portion (130), and a tightening operation is performed so that the bolt (b) is fastened to the threaded area (112) by positioning the nut portion (110) on the bolt (b) and rotating the nut portion (110) in the tightening direction (fastening direction).

[0068] If this tightening operation is performed a little more, when the bolt enters the non-threaded area (113), the downstream cut-off portion (123) is caught on the first catch (133), so that the spiral winding portion (121) of the spiral coil spring (120) is elastically expanded and deformed by friction between the screw thread of the bolt and the spiral coil spring, and the expanded state is maintained, thereby enabling the bolt to enter. In this state, the tightening direction rotation operation of the nut portion (110) can be stably performed a predetermined number of times to complete the tightening operation.

[0069] In this way, when the tightening operation of the anti-loosening nut (100) is completed, if an external force (reverse rotational force) is applied in the release direction of the nut portion (110) as shown in (b) of FIG. 7 due to vibration, impact, or incorrect operation, the control line portion (140) is caught by the control line engaging portion (130) and is in a fixed state, so that the frictional force with the threaded portion of the bolt (b) is applied to the spiral winding portion (121) so that its inner diameter is reduced and contracted and deformed, and the spiral winding portion (121) is settled in the grooved portion of the bolt threaded portion to apply an elastic compressive force, so that the reverse rotation of the nut portion (110) becomes impossible, and the tightening state with the bolt (b) also does not loosen, so that problems caused by accidental or unintentional loosening can be prevented in advance.

[0070] Meanwhile, the anti-loosening nut (100) according to one embodiment of the present invention can conveniently release the fastening state through a simple operation without artificially damaging the nut portion as in the past when maintenance or an emergency situation occurs.

[0071] To explain the release operation of the anti-loosening nut (100) in more detail, in the fastening state of the anti-loosening nut (100), as shown in FIG. 6, the first engaging control part (141) is engaged with the first engaging jaw (133), the control line curved part (142) is inserted and seated in the engaging ring (132), and the second engaging control part (143) is engaged with the second engaging jaw (134), so that the fastening state of the anti-loosening nut (100) is stably maintained.

[0072] In this state, when a release operation of the anti-loosening nut (100) is to be performed, an operating force is applied to the contact lever (144) in the direction of the arrow in Fig. 6, and the first engaging control part (141) is detached from the first engaging jaw (133) and the second engaging control part (143) is detached from the second engaging jaw (134) in the form shown by the broken line, thereby releasing the engaging state.

[0073] In this way, when the engagement state of the second engagement control part (143) with the second engagement jaw (134) is released, the restraining force is no longer applied, and when the nut part (110) is rotated in the release direction (reverse direction), the upstream end (122) of the spiral coil spring rotates to the stopper part (115) inside the nut part (110) and then is caught by the stopper (115a), so that the spiral winding part (121) is expanded and can perform a rotational motion in the release direction. By performing a predetermined number of more rotational motions of the nut part in the release direction, the nut part can be separated.

[0074] Afterwards, when a tightening operation of the anti-loosening nut (100) is to be performed, the contact lever part (144) may be pressed in the opposite direction of the arrow in Fig. 6 to operate the control line part (140) in a state of being hooked to the control line hooking part (130) and then the nut part (110) may be rotated in the tightening direction (fastening direction).

[0075] Hereinafter, a clamp having a release-preventing nut having a manual release function according to one embodiment of the present invention will be described. However, components similar to those shown in the aforementioned release-preventing nut having a manual release function will be omitted from a detailed description or drawing, and components having differences will be described.

[0076] FIG. 8 is a perspective view for explaining a clamping state of a clamp having a release-preventing nut with a manual release function according to one embodiment of the present invention, FIG. 9 is a perspective view for explaining an unclamping state of a clamp having a release-preventing nut with a manual release function according to one embodiment of the present invention, and FIG. 10 is an exploded perspective view showing a main part of a clamp having a release-preventing nut with a manual release function according to one embodiment of the present invention.

[0077] Referring to FIGS. 8 to 10, a clamp (200) having a release-prevention nut with a manual release function according to one embodiment of the present invention comprises a clamp body (210), a fastening member (220), and a release-prevention nut (100'), and is characterized in that it is configured to perform clamping and unclamping operations at a connection portion of a pipe (not shown) simply and quickly, while reliably performing the release-prevention action in a completed fastening state.

[0078] The clamp body (210) is composed of a first clamp body (211) and a second clamp body (212), and a hinge member (213) is provided so that one end of the first clamp body (211) and the second clamp body (211) are hinge-connected to each other.

[0079] The clamp body (210) is configured to bind pipes together by forming a ring shape while being hinged at one end by a hinge member (213) and detachably connected at the other end, while being joined to each other.

[0080] The first clamp body part (211) is formed as a roughly semicircular ring structure with a central portion through which a first clamp groove part (211b) is formed in an arc shape along the circumferential direction on the inner surface of the first semicircular ring body (211a).

[0081] The first clamp body (211) has a fastening member fastening groove (211c) recessed into one end of the first semicircular ring body (211a) in which a fastening member (220) is rotatably installed, and a first hinge groove (211d) recessed into the other end of the first semicircular ring body (211a) in which one side of a hinge member (213) is rotatably installed.

[0082] The fastening member fastening groove (211c) is a groove that is inserted in a form in which the outer edge of one end of the first semicircular ring body (211a) is cut, and a fastening pin insertion hole is formed into which a fastening pin (211e) penetrating the fastening member fastening groove (211c) is inserted.

[0083] The first hinge groove (211d) is a groove that is cut into the outer edge of the other end of the first semicircular ring body (211a), and a hinge pin insertion hole is formed that penetrates the first hinge groove (211d).

[0084] The second clamp body part (212) is formed as a roughly semicircular ring structure with a central portion through which a second clamp groove part (212b) is formed in an arc shape along the circumference direction on the inner surface of the second semicircular ring body (212a).

[0085] The second clamp body (212) has a fastening member receiving groove (212c) recessed into one end of the second semicircular ring body (211a) to receive a fastening member (220), and a nut receiving protrusion (212e) that is recessed to allow a hollow rod (160) of a loosening prevention nut (100') to be described later to be caught by contacting the fastening member receiving groove (212c) is recessed, and a second hinge groove (212d) in which the other end of the hinge member (213) is rotatably installed is recessed into the other end of the second semicircular ring body (212a). The second hinge groove (212d) is a groove that is inserted in a form in which the outer edge of the other end of the second semicircular ring body (212a) is cut, and a hinge pin insertion hole is formed that penetrates the second hinge groove (212d) so that a hinge pin (212f) can be inserted.

[0086] The hinge member (213) has pin penetration holes perforated at one end and the other end of the oval body, and a hinge pin (212f) inserted into the pin insertion hole of the first hinge groove (211d) of the first clamp body part (211) is fastened to the pin penetration hole on one side, and a hinge pin (212f) inserted into the pin insertion hole of the second hinge groove (212d) of the second clamp body part (212) is fastened to the pin penetration hole on the other side.

[0087] Meanwhile, the fastening member (220) has screw threads formed on the outer surface to form a male screw shape and is rotatably connected to the fastening member fastening groove (211c) of the first clamp body (211).

[0088] The fastening member (220) is composed of a fastening ring portion (221) that is inserted into a fastening member fastening groove (211c) and has a hole formed into which a fastening pin (211e) is inserted, and a bolt (222) that has a screw thread formed on a circular bar integrally formed with the fastening ring (221).

[0089] Meanwhile, since the detailed configuration and operation of the anti-loosening nut (100') have been described above, a detailed description will be omitted and only the differences will be described below.

[0090] The anti-loosening nut (100') is a component that is fastened to a fastening member (220) to fix the first clamp body part (211) and the second clamp body part (212), and as described above, it comprises a nut part (110), a spiral coil spring (120) built into the nut part (110), a control line engaging part (130) that is extended and formed in the nut part (110), and a control line part (140) that is formed in the spiral coil spring (120).

[0091] And the nut part (110) is further configured with a hollow rod (160) extending in the direction of entry of the bolt to apply a restraining force to the second clamp body part (212).

[0092] The hollow shaft (160) has a bolt insertion hole formed therein into which a fastening member (220) is inserted. The bolt insertion hole may have a female thread formed on the inner surface, but in this embodiment, it is formed in a form in which a female thread is not formed.

[0093] Hereinafter, a process of fastening or releasing a pipe using a clamp having a release-preventing nut with a manual release function according to one embodiment of the present invention is briefly described.

[0094] First, as shown in FIG. 9, the first clamp body part (211) and the second clamp body part (212) are unfolded while the flanges (not shown) formed at both ends of the pipes (not shown) that are connected to each other are in close contact with each other, and then the flanges are positioned so that they are inserted into the first clamp groove part (211b) and the second clamp groove part (212b), and when the first clamp body part (211) and the second clamp body part (212) are rotated based on the hinge member (213), the clamp body part (210) is gathered into a ring shape as shown in FIG. 8.

[0095] In this state, the fastening member (220) is inserted into the bolt insertion hole of the extension bar (160) formed in the anti-loosening nut (100'), and then the fastening process of the nut portion (110) is performed. The function of this anti-loosening nut (100') is the same as that of the anti-flicker nut (100) described above, so it will be briefly described.

[0096] First, a tightening operation is performed to fasten the threaded area (112) to the bolt (222) of the fastening member (200) by rotating the nut portion (110) clockwise, and when a further tightening operation is performed to enter the non-threaded area (113), the downstream cut-off portion (123) is caught on the first catch (133), and the spiral winding portion (121) is elastically deformed by friction with the threaded area of ​​the bolt (222) to maintain an expanded state, thereby enabling the bolt (222) to enter.

[0097] In this state, if the tightening direction rotation motion of the nut part (110) continues, the interlocking hollow rod (160) is caught on the nut seating jaw (212e) of the second clamp body part (212) and a pressing force is applied, so that the first clamp body part (211) and the second clamp body part (212) are fixed to each other, so that an adjacent pipe (not shown) can be firmly fixed.

[0098] In this way, even if an external force (reverse rotational force) is applied in the release direction of the nut part (110) due to vibration, impact, or incorrect operation after the tightening operation of the anti-loosening nut (100') is completed, the control line part (140) is caught by the control line catch part (130) as described above and is fixed, so reverse rotation of the nut part (110) is impossible, thereby preventing problems caused by accidental or unintentional loosening in advance.

[0099] Conversely, when it is desired to release the engagement state of the first clamp body part (211) and the second clamp body part (212) due to maintenance or an emergency, if an operating force is applied to the contact lever part (144) in the direction of the arrow in FIG. 6, the first engagement control part (141) is released from the first engagement jaw (133) and the second engagement control part (143) is released from the second engagement jaw (134) in the form shown by the broken line, thereby releasing the engagement state of the control line part (140) with the control line engagement part (130).

[0100] In this way, when the locking state of the control line part (140) is released, the restraining force is not applied, so even if the nut part (110) is rotated in the release direction, the inner diameter of the spiral winding part (121) is not deformed in a reduced form, so that the nut part can be rotated in the release direction. When this release direction rotation operation of the nut part (110) is performed to a certain extent, the interlocking hollow rod (160) is separated from the nut seating jaw (212e) of the second clamp body part (212), so that the movement of the fastening member (220) becomes free. At this time, when the fastening member (220) is rotated in the opposite direction together with the loosening prevention nut (110) to stand up, the first clamp body part (211) and the second clamp body part (212) are separated while spreading apart from each other, and the fastening state of the pipe is released.

[0101] As described above, the clamp equipped with a loosening prevention nut according to the invention prevents reverse rotation of the nut portion (110) while the pipe is fastened, so that problems due to accidental or unintentional loosening can be prevented in advance, and at the same time, in the event of maintenance or an emergency, the fastening state can be conveniently released through a simple operation of pressing the contact lever portion (144) in the direction of the arrow in Fig. 6 without artificially damaging the loosening prevention nut portion as in the past.

[0102] The terms "include," "comprise," or "have" described above, unless otherwise specifically stated, imply that the corresponding component may be present, and therefore should be interpreted to include other components rather than excluding them. All terms, including technical or scientific terms, have the same meaning as commonly understood by a person of ordinary skill in the art to which the present invention pertains, unless otherwise defined. Commonly used terms, such as terms defined in dictionaries, should be interpreted to be consistent with the contextual meaning of the relevant technology, and shall not be interpreted in an ideal or overly formal sense, unless explicitly defined herein.

[0103] Although the configuration and operation of a locking nut having a manual release function and a clamp having the same according to one embodiment of the present invention described above have been described, this is exemplary, and it will be understood by those skilled in the art that some of the above-described embodiments can be substituted and modified without departing from the technical spirit of the present invention.

[0104] Therefore, it should be understood that the scope of protection of the present invention extends to the invention described in the patent claims and equivalents thereof.

[0105] The present invention is configured to perform clamping and unclamping operations of connecting pipes together simply and quickly by applying a loosening prevention nut having a manual loosening function to a pipe clamp, and to reliably perform the loosening prevention operation in a completed fastening state, but is not limited thereto and can be applied interchangeably to various clamps or fastening devices in addition to those for pipes.

Claims

1. In a loosening prevention nut with a spiral coil spring installed inside the nut section, The above nut portion has a threaded area portion in which threads are formed in a certain range on the upstream side in the direction of bolt fastening on the inner surface, a non-threaded area portion in which threads are not formed on the downstream side from the threaded area portion and whose inner diameter is formed larger than that of the threaded area portion, a step portion formed at the boundary between the threaded area portion and the non-threaded area portion, and a stopper portion formed in the non-threaded area portion in contact with the step portion. The above spiral coil spring has a spiral winding portion that is wound in a spiral shape from the upper end so that the bolt that is fastened to the nut portion passes through and is fastened, and is arranged in the non-threaded area, and a downstream bending portion that is bent in the outer diameter direction of the spiral coil spring from the spiral winding portion. The above spiral coil spring further includes a control line portion formed and extended at the end of the downstream bend portion to perform a binding action or a binding release action of the spiral coil spring. A loosening prevention nut having a manual release function, characterized in that the nut portion further includes a control line engaging portion formed at the end of the non-threaded area portion so that the control line portion is engaged or released.

2. In paragraph 1, The above control line hooking part includes a cutting ring body having a cut portion formed on a part of a body protruding in a ring shape at the end of the non-screw area, a hooking ring recessed along the outer circumference of the cutting ring body, a first hooking protrusion formed on one side of the cutting surface of the cutting ring body, and a second hooking protrusion formed on the other side of the cutting surface of the cutting ring body. A release prevention nut having a manual release function, characterized in that the control line part includes a first locking control part extending to an end of the downstream bending part so as to be locked or released from the first locking jaw, a control line curved part extending from the first locking control part so as to be seated on the locking ring, a second locking control part extending from an end of the control line curved part so as to be locked or released from the second locking jaw, and a contact lever part extending from an end of the second locking control part.

3. In paragraph 2, The above first catch control part is composed of a first acute-angle bend part that is bent at an acute angle toward the catch ring at the end of the downstream bend part, The above second hook control part is composed of a second acute-angle bending part that is bent at an acute angle toward the second cutting surface at the end of the control line bending part, A release prevention nut having a manual release function, characterized in that the contact lever portion extends upward from the end of the second lock control portion and has a contact curved portion formed at the free end that makes contact with a finger.

4. In paragraph 3, A loosening prevention nut having a manual loosening function characterized in that the cut portion is formed in a direction opposite to the stopper portion so as to form an acute angle in the circumferential direction from the center line of the nut portion.

5. In paragraph 1, A loosening prevention nut having a manual loosening function, characterized in that the stopper portion is formed to protrude from the wall surface of the non-threaded area portion but is positioned within the formation range of the stepped portion to prevent interference with the progress of the bolt.

6. A clamp body portion configured such that one end of the first clamp body portion and the second clamp body portion are hinge-joined to each other and the other end portions are detachably joined to each other to form a ring shape; A fastening member having screw threads formed on the outer surface to form a male screw shape and rotatably connected to the first clamp body; and A clamp having a release-prevention nut having a manual release function, characterized in that it includes a release-prevention nut according to any one of claims 1 to 5, which is configured to be fastened to the fastening member to fix the first clamp body part and the second clamp body part.

7. In paragraph 6, A clamp having a release-prevention nut with a manual release function, characterized in that the release-prevention nut includes a hollow rod extending in the direction of entry of the bolt into the nut portion to apply a restraining force to the second clamp body portion.

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