Apparatus for marking cracks for safety inspection and diagnosis

Abstract

The present invention relates to a safety diagnosis device for a structure, and more specifically, to a crack marking device for safety inspection and diagnosis that integrates the function of intuitively marking the location of a crack in a structure at a distance or at a high altitude, and the function of aligning and attaching a consumable crack measurement sheet that precisely tracks the micro-growth and dangerous behavioral state of the crack and displays it as a multi-stage visual signal. The crack marking device for safety inspection and diagnosis according to the present invention comprises: a holder portion equipped with a writing material for marking a crack in a structure; an extension portion extending in one direction from the holder portion; a first guide arm and a second guide arm each hinge-coupled to both sides of the holder portion to install a crack measurement sheet attached to the crack portion to indicate the displacement of the crack; and an operating member provided to be movable along the extension portion, which enters between the holder portion and the first and second guide arms or separates from between the holder portion and the first and second guide arms when moving. and a return member that elastically supports the first and second guide arms so that when the operating member enters between the holder portion and the first and second guide arms, the first and second guide arms are switched to an unfolded state in which they spread outward, and when the operating member is removed from the unfolded state, the first and second guide arms are rotated back to a folded state in which they overlap the holder portion.

Description

Technology Field

[0001] The present invention relates to a safety diagnosis device for structures, and more specifically, to a crack marking device for safety inspection and diagnosis that integrates a function of intuitively marking the location of cracks in structures at a distance or at high altitudes, and a function of aligning and attaching consumable crack measurement sheets that precisely track the micro-growth and dangerous behavioral states of cracks and display them as multi-stage visual signals. Background Technology

[0002] Generally, microscopic cracks develop on the surface of concrete or building structures due to various causes, such as aging deterioration, ground subsidence, vibration, and external impact. Since these cracks can be a precursor to structural defects that threaten structural safety, it is crucial to accurately identify their locations and continuously monitor their growth during facility safety inspections and maintenance.

[0003] In the past, when checking for cracks in high places that are out of reach of workers, such as high bridge piers or retaining walls, the method was limited to simply hanging chalk at the end of a pole to mark the crack location, and to observe whether the crack was progressing, a separate ladder truck or scaffolding had to be installed and crack gauges or stickers had to be manually attached.

[0004] As a result, work efficiency was drastically reduced, and the risk of casualties from working at heights was ever-present.

[0005] As prior art for solving this problem, a 'crack indication device' is disclosed in Korean Registered Patent No. 10-2914761.

[0006] The prior art comprises a holder fixing shaft formed radially on a head, four marking holders that accommodate marking members such as chalk, and an elastic support formed on the back of the marking holders. Through this, a radial marking line, such as a cross shape, is marked simply by pressing the marking member toward the structure, and the unused marking holders are flipped over and supported on the structure through the elastic support.

[0007] However, since these conventional technologies merely involve forming 'marking lines' on the surface of structures using chalk or similar materials, there was a cumbersome problem in that a separate crack measurement gauge had to be manually reattached on-site to quantitatively monitor how much the crack actually grows and progresses after marking. Prior art literature

[0008] (Patent Document 0001) KR 10-2914761 B1 The problem to be solved

[0009] The present invention was created to solve the problems of the prior art as described above, and the objective of the present invention is to provide a crack marking device for safety inspection and diagnosis that allows for intuitive marking of cracks in structures located at high places or at a distance using a writing material such as chalk, while simultaneously enabling the remote deployment of a guide arm using a sliding movement mechanism to attach a crack measurement sheet to a wall surface in an accurately aligned state.

[0010] In addition, the present invention aims to provide a crack indicator device for safety inspection and diagnosis that minimizes failures and reduces manufacturing costs through a relatively simple structure by configuring the first and second guide arms to install a crack measurement sheet according to the sliding movement of an operating member.

[0011] In addition, the present invention aims to provide a crack indicator device for safety inspection and diagnosis, wherein the notification indicator of a crack measurement sheet is stably maintained in a folded state under normal circumstances, but when a crack grows, the temporary bond is released to display a hidden different color, and when severe behavior occurs, it is fractured through a cutting notch, thereby allowing the progress of stages 1 and 2 to be immediately identified visually from a distance.

[0012] In addition, the present invention aims to provide a crack indicator device for safety inspection and diagnosis that can prevent measurement errors caused by the temporary bonding part being unintentionally loosened by fixing the temporary bonded notification indicator part by a temporary bonding holder. means of solving the problem

[0013] A crack marking device for safety inspection and diagnosis according to the present invention for achieving the above-mentioned objective comprises: a holder portion equipped with a writing material for performing marking on a crack portion of a structure; an extension portion extending in one direction from the holder portion; a first guide arm and a second guide arm each hinge-coupled to both sides of the holder portion to install a crack measuring sheet attached to the crack portion to indicate the displacement of the crack; an operating member provided to be movable along the extension portion, which enters between the holder portion and the first and second guide arms or exits from between the holder portion and the first and second guide arms when moving; and a return member elastically supporting the first and second guide arms so that when the operating member enters between the holder portion and the first and second guide arms, the first and second guide arms are switched to an unfolded state where they spread outward, and when the operating member exits from the unfolded state, the first and second guide arms are rotated back to a folded state where they overlap the holder portion.

[0014] The crack measuring sheet comprises: a first attachment part detachably coupled to the first guide arm to be attached to one side surface of the crack; a second attachment part detachably coupled to the second guide arm to be attached to the other side surface of the crack; and a crack notification part connecting the first attachment part and the second attachment part to visually indicate the growth of the crack; wherein the crack notification part comprises a notification display part formed in the shape of a sheet, which is temporarily bonded and maintained in a folded and overlapping state; and when the crack grows and the distance between the first attachment part and the second attachment part increases, the temporarily bonded state is released and the overlapping part unfolds to indicate initial crack growth.

[0015] The crack notification unit may further include a cutting notch that induces fracture by tensile force to notify the outside of the risk of crack growth if additional crack growth occurs after the notification display unit is unfolded.

[0016] The crack measuring sheet may further include a detachable temporary bonding holder that clamps the temporary bonded portion of the notification display portion from the outside to prevent the temporary bonded portion from being arbitrarily separated before attachment. Effects of the invention

[0017] According to the present invention, not only can cracks be easily marked using the writing material of the holder part, but the crack measuring sheet can also be installed in the cracked part in an optimally aligned state by remotely controlling the first guide arm and the second guide arm, thereby improving the accuracy of crack observation in high places and dangerous areas.

[0018] In addition, since the first and second guide arms of the present invention fold or unfold by the sliding movement of the operating member, storage and portability are easy, and manufacturing costs can be reduced due to the simple mechanical structure.

[0019] In addition, the present invention allows the notification display portion of the crack measurement sheet to be stably maintained in a folded state under normal circumstances, but when actual crack growth occurs, the temporary bond is released and a different color hidden on the inside is displayed on the outside, thereby making it easy to identify and take action regarding crack growth.

[0020] In addition, in the event that a crack grows further, the present invention concentrates tensile stress on the cutting notch formed in the notification indicator, causing the crack notification itself to completely rupture, thereby easily notifying of the risk of crack growth even from a distance and enabling prompt action.

[0021] In addition, since the present invention clamps the notification display unit by a temporary joint holder, it can completely prevent accidental separation and malfunction caused by various external forces and vibrations, thereby preventing measurement errors. Brief explanation of the drawing

[0022] FIG. 1 is a perspective view illustrating a crack indicator device for safety inspection and diagnosis according to an embodiment of the present invention. FIG. 2 is a perspective view illustrating a crack indicator device for safety inspection and diagnosis according to an embodiment of the present invention, showing a state in which it is installed on the first and second guide arms to attach a crack measurement sheet. FIG. 3 is a drawing illustrating a crack indicator device for safety inspection and diagnosis according to an embodiment of the present invention, showing the front and top views of the initially installed state. FIG. 4 is a drawing illustrating a crack indicator device for safety inspection and diagnosis according to an embodiment of the present invention, showing the front and top views in which the notification indicator is partially unfolded as the crack progresses. FIG. 5 is a drawing illustrating a crack indicator device for safety inspection and diagnosis according to an embodiment of the present invention, showing a state in which crack growth has further expanded and the crack notification part has fractured. Specific details for implementing the invention

[0023] Hereinafter, embodiments of the present invention will be described with reference to the attached drawings.

[0024] As illustrated in FIGS. 1 and 2, a crack marking device (100) for safety inspection and diagnosis according to an embodiment of the present invention comprises: a holder part (110) on which a writing material (115) for performing marking on a crack part (1) of a structure is mounted; an extension part (120) extending in one direction from the holder part (110); a first guide arm (141) and a second guide arm (143) each hinged (142) to both sides of the holder part (110) to install a crack measuring sheet (150) attached to the crack part (1) to indicate the displacement of the crack; an operating member (130) provided to be movable along the extension part (120) and, when moving, enters between the holder part (110) and the first guide arm (141) and the second guide arm (143) or separates from between the holder part (110) and the first guide arm (141) and the second guide arm (143); and the operating member (130) It is configured to include a return member (160) that elastically supports the first guide arm (141) and the second guide arm (143) so that when entering between the holder part (110) and the first guide arm (141) and the second guide arm (143), the first guide arm (141) and the second guide arm (143) are switched to an unfolded state in which they spread outward, and when the operating member (130) is detached from the unfolded state, the first guide arm (141) and the second guide arm (143) rotate back to a folded state in which they overlap with the holder part (110), and a crack measuring sheet (150) that is selectively coupled to the first guide arm (141) and the second guide arm (143).

[0025] The holder part (110) is formed in a cylindrical or clamp-type structure that can firmly fix and hold a writing material (115), such as chalk or a marker, inside and can intuitively mark the location of the crack part (1) of the structure, so that the writing material (115) can be exposed and positioned at the end of the holder part (110).

[0026] The extension member (120) is a hollow or solid rod member that extends from the end opposite to the writing material (115) in the holder member (110), and a handle (121) that can be gripped or operated by a worker may be formed at the end.

[0027] The extension member (120) positions the holder member (110) away from the worker, thereby allowing easy access to and marking of the crack (1) located at a high place or a long distance.

[0028] The first guide arm (141) and the second guide arm (143) are each axially fixed to the left and right sides of the holder part (110) via a hinge (142) and can rotate independently, and can guide a crack measuring sheet (150) made of coated paper or film material to be installed in the crack part (1) in a flat, unfolded state.

[0029] At this time, the first guide arm (141) and the second guide arm (143) may be configured with a crack measuring member installation part (145) in which one end and the other end of the crack measuring member (150) are respectively detachably installed.

[0030] The first guide arm (141) and the second guide arm (143) are installed so that the ends of the first guide arm (141) and the second guide arm (143) can be rotated by a hinge (142) at the end where the writing material (115) is exposed in the holder part (110), so that in a folded state in close contact with the holder part (110), the first guide arm (141) and the second guide arm (143) can be rotated so as to be orthogonal to the holder part (110), and the ends of the first guide arm (141) and the second guide arm (143) can be spread outward in an unfolded state.

[0031] The operating member (130) can slide along the outer surface of the extension member (120) in a straight line or rotational manner, and when advancing toward the holder member (110), it can penetrate the gap between the holder member (110) and the hinge (142) joint portion of the first guide arm (141) and the second guide arm (143) to forcibly press the first guide arm (141) and the second guide arm (143) to the sides and spread them apart.

[0032] In the operating member (130), a wedge-shaped entry protrusion (131) that enters between the holder part (110), the first guide arm (141), and the second guide arm (143) may be formed at a position corresponding to the first guide arm (141) and the second guide arm (143).

[0033] The end facing the first guide arm (141) and the second guide arm (143) of the operating member (130) has a tapered shape and can enter between the first guide arm (141) and the second guide arm (143), and the operating member (130) is formed to extend from the part where the first guide arm (141) and the second guide arm (143) are located to the part where the handle (121) is located, so that the operating member (130) can be slid along the longitudinal direction of the extension portion (120) at the position of the handle (121).

[0034] The return member (160) is provided in the form of a torsion spring, a tension spring, or an elastic rubber interposed between the holder part (110) and the first guide arm (141) and the second guide arm (143), and can provide continuous elastic force to automatically rotate and return the first guide arm (141) and the second guide arm (143) to a folded state in which they are in close contact with the holder part (110) by means of their own elastic restoring force when the operating member (130) retracts backward and exits the gap between the holder part (110), the first guide arm (141), and the second guide arm (143) that had been inserted.

[0035] As illustrated in FIGS. 3 to 5, the crack measuring sheet (150) includes a first attachment part (151) that is detachably coupled to a first guide arm (141) to be attached to one side surface of the crack portion (1), a second attachment part (152) that is detachably coupled to a second guide arm (143) to be attached to the other side surface of the crack portion (1), and a crack notification part (153) that connects the first attachment part (151) and the second attachment part (152) to visually indicate the growth of the crack portion (1).

[0036] The first attachment part (151) and the second attachment part (152) can be temporarily and detachably fixed to the crack support installation part (145) configured at the end of the first guide arm (141) and the second guide arm (143), respectively, by means of a magnet, Velcro, or slot connection.

[0037] The first attachment part (151) and the second attachment part (152) can be fixed by being inserted into each end of the crack measuring sheet (150) in the form of a pin, and a double-sided tape or adhesive layer can be installed on the surface of the first attachment part (151) and the second attachment part (152) that is attached to the crack surface so that it can be strongly adhered to the crack surface.

[0038] The crack notification part (153) includes a notification display part (155) that is maintained in a folded and overlapping state of a part of the sheet-shaped material, and when the crack part (1) grows and the distance between the first attachment part (151) and the second attachment part (152) increases, the part that was finely attached is torn and released, and the overlapping part that was folded on the inside is extended outward, thereby functioning to easily confirm the initial occurrence and growth of the crack with the naked eye.

[0039] At this time, the overlapping and folding notification indicator (155) can be temporarily bonded by a hot melt adhesive for temporary bonding, a pressure-sensitive adhesive (PSA) for re-release, or ultrasonic welding that bonds the overlapping parts by applying heat or ultrasonic stimulation in the form of very fine points, or by a water-based latex adhesive so that the bonded parts can be temporarily bonded and separated by tensile force due to crack growth.

[0040] The notification display part (155) can be formed by overlapping and folding the two ends facing each other to connect them while the central part is positioned convexly downwards.

[0041] The notification indicator (155) may have a different color from the crack notification (153) so that it can be easily visually identified when the temporarily joined part is exposed to the outside, and a measurement scale is formed on the notification indicator (155) so that the measurement scale that was hidden is exposed to the outside as the temporarily joined part separates and opens up, thereby allowing the width of the grown crack (1) to be measured.

[0042] And the crack notification part (153) formed in the form of a sheet may be provided with a coated paper, synthetic paper, or plastic film material to protect against moisture, and the entire crack measuring sheet (150) may be formed of the same material as the crack notification part (153).

[0043] Additionally, the crack notification unit (153) further includes a cutting notch (156) that induces fracture by tensile force to notify the outside of the risk of crack growth if additional crack growth occurs after the notification display unit (155) is unfolded.

[0044] A cutting notch (156) is formed in the form of an engraved groove, slit, or perforation line on one or both edges in the width direction of the notification display part (155), and even after the overlapping notification display part (155) is fully unfolded, if the crack part (1) continues to grow and a tensile force of a certain level or higher is applied, the crack notification part (153) is broken along the cutting notch (156), thereby displaying a second stage of severe danger signal.

[0045] Additionally, the crack measuring sheet (150) may be equipped with a temporary joining holder (157) that clamps the outside of the temporary joining portion of the notification display portion (155), and the temporary joining holder (157) further includes a detachable structure that prevents the temporary joining portion of the notification display portion (155) from being arbitrarily separated.

[0046] The temporary bonding holder (157) is structured to strongly interlock and fix the outer surface of the folded and temporary bonded notification display part (155) in a U-shape or pin shape, and can prevent malfunctions during delivery and work in which the temporary bonding part comes loose due to external impact or shaking until the crack measurement sheet (150) is completely attached to the wall surface using the device.

[0047] And, while the temporary bonding holder (157) is clamping the temporary bonded outer side, as the temporary bonded notification part (155) gradually spreads apart due to the growth of the crack (1), the temporary bonding holder (157) can also gradually slide down to the overlapping lower side and be completely detached from the notification part (155).

[0049] We will now explain the interactions and effects between each component described above.

[0050] As illustrated in FIG. 1, when a worker marks a crack (1) located at a high place or a distance from the structure, the crack marking device (100) for safety inspection and diagnosis according to an embodiment of the present invention holds the handle (121) provided at the end of the extension member (120) and positions the holder member (110) on the crack (1).

[0051] At this time, in the initial state, the first guide arm (141) and the second guide arm (143) maintain a folded state in close contact with the holder part (110) by the elastic support force of the return member (160).

[0052] In this state, the writing material (115) exposed at the end of the holder part (110) is brought into contact with the crack location to perform a first marking, thereby indicating the location of the crack part (1).

[0053] As illustrated in FIG. 2, when a crack measuring sheet (150) is attached to observe the growth of the crack portion (1), the operator slides the operating member (130) along the longitudinal direction of the extension portion (120) at the handle (121) toward the holder portion (110). An entry protrusion (131) formed at the end of the operating member (130) advancing along the outer surface of the extension portion (120) enters the boundary surface between the holder portion (110), the first guide arm (141), and the second guide arm (143).

[0054] As the operating member (130) fully enters between the holder part (110) and the first guide arm (141) and the second guide arm (143), the first guide arm (141) and the second guide arm (143) overcome the elastic force of the return member (160) and rotate around the hinge (142) to be forcibly switched to an unfolded state that spreads outward.

[0055] When the first guide arm (141) and the second guide arm (143) are in an unfolded state, the first attachment part (151) and the second attachment part (152) of the crack measuring sheet (150) are respectively attached to the crack attachment part (145) provided at the end of the first guide arm (141) and the second guide arm (143), and double-sided tape or adhesive is applied to the first attachment part (151) and the second attachment part (152).

[0056] When the crack measuring sheet (150) is installed on the first guide arm (141) and the second guide arm (143), the device is pushed toward the crack portion (1) to attach the double-sided tape or adhesive layer installed on the first attachment portion (151) and the second attachment portion (152) of the crack measuring sheet (150) so that it is positioned on one side and the other side surface of the crack portion (1).

[0057] As illustrated in FIG. 3, once attachment is complete, the operator retracts the operating member (130) back toward the handle (121) to detach it from between the holder part (110), the first guide arm (141), and the second guide arm (143).

[0058] As the operating member (130) is disengaged, the elastic restoring force of the return member (160) interposed between the holder part (110) and the guide arms acts, so that the first guide arm (141) and the second guide arm (143) automatically rotate back to a folded state where they overlap the holder part (110) again.

[0059] In this process, the crack measuring sheet (150) is gently separated from the crack measuring installation part (145) of the guide arms and is finally left on the wall of the structure.

[0060] The crack measuring sheet (150) attached to the structure receives tensile force as the crack portion (1) grows and the distance between the first attachment portion (151) and the second attachment portion (152) increases.

[0061] As shown in FIG. 4, when tensile force is applied, the temporary bonding state of the notification indicator (155), which was folded and overlapped with the central part convexly downward, is released and opens up as if being torn. When the temporary bonding is released, the notification indicator (155), which has a different color from the crack notification part (153) hidden inside, is revealed to visually indicate the growth of the initial crack.

[0062] At this time, as the notification display part (155) opens, the measurement scale that was hidden is exposed to the outside, so the width of the grown crack part (1) can be measured precisely.

[0063] As shown in FIG. 5, even after the notification display (155) is fully unfolded, if the crack (1) continues to grow further and a tensile force of a certain level or higher is applied, stress is concentrated in the cut notch (156) in the form of an intaglio groove or perforation line formed on the width edge of the notification display (155).

[0064] Accordingly, the crack notification part (153) is severed along the cutting notch (156) and becomes completely broken, thereby displaying a second stage of severe structural danger signal to the outside, allowing for prompt action to be taken.

[0066] Accordingly, the crack marking device (100) for safety inspection and diagnosis according to an embodiment of the present invention can not only mark the crack (1) through the writing material (115) of the holder part (110), but also observe the growth of the crack (1) by installing a crack measurement sheet (150) through the first guide arm (141) and the second guide arm (143). Since the first guide arm (141) and the second guide arm (143) can be unfolded or folded by sliding the operating member (130), the volume is minimized, making it easy to carry and reducing manufacturing costs with a relatively simple structure.

[0067] In addition, the present invention allows the notification indicator (155) of the crack measuring sheet (150) to be stably maintained in a folded state during normal operation, and when a crack grows, the temporary bond is released and the hidden color is exposed to the outside, thereby enabling immediate visual identification and action regarding whether the crack is progressing even from a distance.

[0068] In addition, in the event that severe additional crack behavior occurs, the cutting notch (156) portion is reliably fractured by tensile force, allowing the progression of the crack to be easily observed from the outside, thereby preventing accidents involving human casualties by taking prompt action.

[0069] In addition, since the provisional joint holder (157) clamps the provisional joint portion of the notification display portion (155) from the outside, the provisional joint portion is prevented from being separated by external forces other than cracks, thereby preventing measurement errors.

[0071] Although specific embodiments of the present invention have been described above, it is obvious to those skilled in the art that various modifications and variations are possible within the scope of the technical spirit and claims of the present invention. Explanation of the symbols

[0072] 100: Crack indicator 110: Holder part 115: Written entry 120: Loan extension 121: Handle 130: Motion component 131: Entry protrusion 141: First guide arm 143: Second guide arm 142: Hinge 145: Crack indicator installation section 150: Crack measurement indicator 151: First attachment part 152: Second attachment part 153: Crack Notification Unit 155: Notification Display Unit 156: Cutting furnace cl 157: Temporary joining holder

Claims

Claim 1 A crack marking device for safety inspection and diagnosis, characterized by comprising: a holder portion equipped with a writing material for performing marking on a crack portion of a structure; an extension portion extending in one direction from the holder portion; a first guide arm and a second guide arm each hinge-coupled to both sides of the holder portion to install a crack measuring sheet attached to the crack portion to indicate the displacement of the crack; an operating member provided to be movable along the extension portion, which enters between the holder portion and the first and second guide arms or exits from between the holder portion and the first and second guide arms when moving; and a return member that elastically supports the first and second guide arms so that when the operating member enters between the holder portion and the first and second guide arms, the first and second guide arms are switched to an unfolded state where they spread outward, and when the operating member exits from the unfolded state, the first and second guide arms rotate back to a folded state where they overlap the holder portion. Claim 2 A crack indicator for safety inspection and diagnosis according to claim 1, wherein the crack indicator comprises: a first attachment part detachably coupled to the first guide arm so as to be attached to one side surface of the crack; a second attachment part detachably coupled to the second guide arm so as to be attached to the other side surface of the crack; and a crack notification part connecting the first attachment part and the second attachment part to visually indicate the growth of the crack; wherein the crack notification part comprises a notification display part formed in the shape of a sheet, which is temporarily bonded and maintained in a folded and overlapping state; and wherein when the crack grows and the distance between the first attachment part and the second attachment part increases, the temporarily bonded state is released and the overlapping part is unfolded to indicate the growth of the crack. Claim 3 A crack indicator device for safety inspection and diagnosis, characterized in that, in paragraph 2, the crack notification unit further includes a cutting notch that induces fracture by tensile force to notify the outside of the risk of crack growth if additional crack growth occurs after the notification indicator unit is unfolded. Claim 4 A crack indicator device for safety inspection and diagnosis, characterized in that, in paragraph 2, the crack measuring sheet further includes a detachable temporary bonding holder that clamps the temporary bonded portion of the notification display portion from the outside to prevent the temporary bonded portion from being arbitrarily separated before attachment.

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