JP6864203B1 - Fatigue crack repair wedge member removal mechanism, fatigue crack repair wedge member mounting method, and fatigue crack repair wedge member removal method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mechanism for removing a wedge member for repairing a fatigue crack, a method for mounting a wedge member for repairing a fatigue crack, and a method for removing the wedge member for repairing a fatigue crack. SOLUTION: A first slope component 11, a second slope component 12, and a second slope component 12 are fitted into a stop hole 3 provided for a fatigue crack 2 to suppress a stress fluctuation width of a structure 1. A removal mechanism used for removing the repair wedge member 10 provided with a mounting load applying means for applying a load in the direction of sliding on the first slope component 11, and the second slope component 12 is the first slope component. A removal load applying means (bolt 14) that slides on the 11 and applies a load in a downward direction is provided, and when the repair wedge member 10 is removed from the stop hole 3, the removal load is applied by the removal load applying means (bolt 14). Give. [Selection diagram] Fig. 1

Description

The present invention applies to a fatigue crack repairing wedge member removing mechanism for fatigue cracks, which is applied to fatigue cracks generated in various structures such as ships, marine structures, bridges, roads, vehicles, aircraft, and transportation / machine machines. The present invention relates to a method of mounting a wedge member for repair and a method of removing the wedge member for repairing fatigue cracks.

When fatigue cracks are found in metal structures such as ships, marine structures, and bridges, it is necessary to take appropriate measures so that the cracks do not continue to grow and lead to serious damage accidents. ..
However, it is often difficult to take large-scale permanent measures on structures in operation or in service. Especially in areas where work involving fire such as welding and gouging is prohibited, first-aid measures that are easy to construct are taken for the time being, and the timing when permanent measures such as the next docking and large-scale repairs are possible. It is a realistic coping method to manage to have it while watching the progress.

18A and 18B are views showing a state in which a wedge member for repairing fatigue cracks is fitted into a stop hole, FIG. 18A is a front view, FIG. 18B is a sectional view taken along line BB', and FIG. 18C is a cross-sectional view taken along the line BB'. Is a cross-sectional view taken along the line AA'. In order to make the structure easy to understand, in FIGS. 18 (b) and 18 (c), the slope parts and the base material plate are shown in cross sections, and the bolts are sketches.
FIG. 18 is based on FIG. 8 of Patent Document 1. In Patent Document 1, the first slope component 11 on which the bolt female screw 13 is formed, the second slope component 12 slidably abutting on the first slope component 11, and the bolt female screw 13 of the first slope component 11 are described. A repair member (repair wedge member) 10 composed of a bolt 14 to be screwed in is disclosed. By fitting the repair member 10 into a stop hole 3 or a wedge hole provided when a crack occurs in the base material plate 1 and applying a wedge load W, the stress fluctuation width at the hole end is suppressed. , It is possible to prevent the recurrence of cracks from the hole end.
However, if the repair member is accidentally tightened during installation, or if a large wedge load W acts after installation, the repair member 10 may not be easily removed from the stop hole 3 or wedge hole. is there.

Here, Patent Document 2 discloses a removing tool used for removing and removing a wedge ring in a beam-column joint structure.
Further, Patent Document 3 includes a wedge-shaped driving member, a lower wedge-shaped pressure receiving member, an upper wedge-shaped pressure receiving member, a plate-shaped shoe, a reaction force receiving means, a driving means, and a stopper means, and the driving means can be removed after the hoisting. A wedge-shaped jack device is disclosed.

JP-A-2018-140488 Japanese Unexamined Patent Publication No. 2001-105341 Japanese Unexamined Patent Publication No. 8-324980

Patent Documents 2 and 3 describe the removal of the member, but none of them relates to the removal of the fatigue crack repair member having the first slope part and the second slope part fitted in the stop hole or the wedge hole. Absent.
Therefore, the present invention provides a mechanism for removing a fatigue crack repair wedge member, which can safely and reliably remove a repair wedge member having a first slope component and a second slope component from a stop hole or a wedge hole. It is an object of the present invention to provide a method of mounting a wedge member for repair and a method of removing the wedge member for repairing a fatigue crack.

In the wedge member removing mechanism for repairing fatigue cracks according to claim 1, the stress fluctuation width of the structure is suppressed by fitting into a stop hole and / or a wedge hole provided for the fatigue crack generated in the structure. A first slope component having a slope for sliding, a second slope component having a slope sliding on the first slope component, and a second slope component in a direction of sliding up on the first slope component. A removal mechanism used for removing a repair wedge member provided with a mounting load applying means for applying a load, and a removing load applying means for applying a load in a direction in which the second slope component slides on the first slope component and slides down. When the repair wedge member is removed from the stop hole and / or the wedge hole, the removal load is applied by the removal load applying means.
According to the first aspect of the present invention, when the repair wedge member is removed from the stop hole and / or the wedge hole, the repair wedge member is safely and surely provided by applying the removal load by the removal load applying means. Can be removed.

According to the second aspect of the present invention, as mounting load applying means, a bolt that applies a separation load in a direction that separates a second slope component that fits into a bolt female screw formed on the first slope component, and a removal load applying means. As a result, a proximity load applying means for applying a proximity load in a direction in which the first slope component and the second slope component are close to each other is provided, and when the repair wedge member is removed from the stop hole and / or the wedge hole, the proximity load applying means is used. It is characterized by applying a proximity load.
According to the second aspect of the present invention, the repair wedge member can be safely and surely removed by applying the proximity load by the proximity load applying means at the time of removal.

According to the third aspect of the present invention, as the proximity load applying means, a removal bolt that also serves as a locking means for locking the first slope part and the second slope part, and a removal bolt opened in the first slope part. It is characterized by having an elongated hole through which the bolt can freely penetrate and a female screw for the removal bolt to which the removal bolt formed on the second slope component is fitted.
According to the third aspect of the present invention, a proximity load is applied by rotating the removal bolt fitted to the female screw of the removal bolt through the slotted hole, and the second slope part is brought close to the first slope part. Can be drawn in the direction. Further, by using the removing bolt as the locking means, it is possible to prevent the second slope component fitted in the stop hole and / or the wedge hole from falling off.

According to the fourth aspect of the present invention, as a proximity load applying means, a U-shaped rod having a male screw at an end and mounted around the second slope part and the first slope part for sandwiching the second slope part. It is characterized by having a plate having a through hole that abuts and penetrates the U-shaped rod, and a nut that fits into the male screw of the U-shaped rod.
According to the fourth aspect of the present invention, a proximity load is applied by sandwiching the first slope part and the second slope part between a U-shaped rod and a plate and tightening a nut, and the second slope part is a first slope part. Can be drawn in the direction of.

According to the fifth aspect of the present invention, as the mounting load applying means, the proximity load applying means for applying the proximity load in the direction in which the first slope component and the second slope component are close to each other, and as the removal load applying means, the first slope component. A bolt that applies a separation load in the direction in which the second slope part that fits into the female screw of the bolt is provided, and the separation load is applied by the bolt when the repair wedge member is removed from the stop hole and / or wedge hole. It is characterized by giving.
According to the fifth aspect of the present invention, the repair wedge member can be safely and surely removed by applying a separation load with a bolt at the time of removal.

The present invention according to claim 6 is characterized in that, as the proximity load applying means, an elastic band mounted around the first slope component and the second slope component to generate tension is provided.
According to the sixth aspect of the present invention, a proximity load can be easily applied at all times with a compact configuration. Further, since the first slope part and the second slope part are connected by an elastic band, the work of attaching the repair wedge member to the stop hole and / or the wedge hole is facilitated, and the second slope part is prevented from falling off. Can be used safely.

According to the seventh aspect of the present invention, as the proximity load applying means, an elastic band mounted around the first slope component and the second slope component to generate tension, and an initial penetration through an elongated hole formed in the first slope component. It is characterized by being provided with a tightening bolt and an initial tightening bolt female screw into which the initial tightening bolt formed on the second slope component is fitted.
According to the seventh aspect of the present invention, a proximity load can be applied by the elastic band and the initial tightening bolt. Further, since the first slope part and the second slope part are connected by the elastic band and the initial tightening bolt, the work of mounting the repair wedge member to the stop hole and / or the wedge hole becomes easy, and the second slope part Can be used safely by preventing it from falling off.

The present invention according to claim 8 is a U-shaped rod having a male screw at an end and mounted around the second slope component as a proximity load applying means, and the first slope component for sandwiching the second slope component. It is characterized by including a plate having a through hole that abuts and a U-shaped rod penetrates, a nut that fits into a male screw of the U-shaped rod, and a spring that is mounted between the plate and the nut.
According to the eighth aspect of the present invention, a proximity load can be constantly applied by tightening the nut and compressing the spring. Further, since the first slope part and the second slope part are connected by a U-shaped rod, the second slope part can be prevented from falling off and can be used safely.

The method of mounting the wedge member for repairing fatigue cracks according to claim 9 is a method of mounting the wedge member for repair using a mechanism for removing the wedge member for repairing fatigue cracks, which is above the first slope component. The mounting step for mounting the second slope part and the removal bolt are passed through the slotted hole of the first slope part and the tip is turned into the female screw of the removal bolt of the second slope part, and the first slope part and the second A locking step for locking the slope component, a fitting step for fitting the locked first slope component and the second slope component into the stop hole and / or the wedge hole, and a second by turning a bolt to apply a separation load. It is characterized by including a wedge load generation step in which a slope component is raised onto a first slope component to generate a wedge load.
According to the ninth aspect of the present invention, by having the locking step using the removal bolt, the relative positioning of the second slope component with respect to the first slope component when fitting into the stop hole and / or the wedge hole. Can be easily and reliably performed to generate an appropriate rust load.

The present invention according to claim 10 includes a step of determining whether to continue using the removal bolt as a locking means after the wedge load generation step, and if not, a step of determining how to handle the removal bolt by temporarily removing the removal bolt. It is characterized by that.
According to the tenth aspect of the present invention, by removing the removal bolts as necessary, the change in the relative position of the second slope part with respect to the first slope part is not hindered, and the stop hole and / or the wedge hole can be removed. It can follow the opening displacement.

The method of mounting the wedge member for repairing fatigue cracks according to claim 11 is a method of mounting the wedge member for repair using a mechanism for removing the wedge member for repairing fatigue cracks, which is above the first slope component. A mounting step for mounting the second slope component, an elastic band mounting step for hanging an elastic band around the first slope component and the second slope component, and an operation in the direction of screwing the bolt to form the first slope component. A position adjustment step for adjusting the positional relationship of the second slope part, a fitting step for fitting the first slope part and the second slope part around which the elastic band is hung into the stop hole and / or the wedge hole, and the direction of loosening the bolt. It is characterized by comprising a wedge load generation step in which the second slope component is raised onto the first slope component by the tension of the elastic band to generate a wedge load.
According to the eleventh aspect of the present invention, by having an elastic band mounting step for hanging an elastic band around the first slope component and the second slope component, and a position adjusting step using bolts, a stop hole and a stop hole can be provided. / Or, the relative positioning of the second slope component with respect to the first slope component when fitting into the wedge hole can be easily and surely performed, and an appropriate rust load can be generated. Further, a close load can be constantly applied to the repair wedge member fitted in the stop hole and / or the wedge hole by the tension of the elastic band.

The method for removing the wedge member for repairing a fatigue crack according to claim 12 is a method for removing the wedge member for repair using a mechanism for removing the wedge member for repairing a fatigue crack, which is separated from the second slope component. The bolt loosening step to loosen the bolt to which the load is applied, the proximity load application step to apply the proximity load by operating the proximity load application means, and the proximity load application means to further operate to stop the entire repair wedge member. It is characterized by including a wedge member removing step for removing from the hole and / or the wedge hole.
According to the twelfth aspect of the present invention, the repair wedge member can be safely and surely removed by operating the proximity load applying means.

The present invention according to claim 13 is characterized in that, in the proximity load applying step, the removal bolt is screwed into the female screw of the removal bolt to apply the proximity load in the direction in which the first slope component and the second slope component are close to each other.
According to the thirteenth aspect of the present invention, the second slope component can be pulled toward the first slope component by rotating the removal bolt fitted to the female screw of the removal bolt through the elongated hole.

The present invention according to claim 14, wherein when the removal bolt is once removed, the removal bolt is fitted to the female screw of the removal bolt before the proximity load applying step.
According to the 14th aspect of the present invention, it is possible to prepare for applying a proximity load by fitting the removal bolt to the female screw in advance.

According to the fifteenth aspect of the present invention, in the proximity load applying step, a U-shaped rod is inserted between the stop hole and / or the wedge hole and the first slope part and the second slope part and hooked on the back side of the second slope part. Attach the plate to the first slope part with the end facing the front from the through hole, fit the nut to the male screw at the end and screw it in, and screw in the first slope part and the second slope through the plate. It is characterized in that a proximity load is applied in a direction in which the parts are close to each other.
According to the fifteenth aspect of the present invention, a proximity load is applied by sandwiching the first slope part and the second slope part between a U-shaped rod and a plate and tightening a nut, and the second slope part is a first slope part. Can be drawn in the direction of.

The present invention according to claim 16 is equipped with an urging means for applying an urging load to the proximity load applying means when the second slope component does not move even if the proximity load is applied in the proximity load applying step. It is further equipped with a step of mounting the urging means, and by constantly applying the urging load in the direction in which the first slope part and the second slope part are close to each other by the urging means, it is repaired by a stochastic external load acting on the structure. It is characterized in that the entire wedge member can be removed from the stop hole and / or the wedge hole.
According to the 16th aspect of the present invention, when an excessive tensile load is applied to the stop hole and / or the wedge hole, the wedge load is released, and the urging load applied to the proximity load applying means causes the second slope component. Can be drawn to the first slope.

The present invention according to claim 17 is characterized in that a coil spring or a leaf spring is used as the urging means.
According to the 17th aspect of the present invention, an appropriate urging load can be continuously applied by a simple configuration.

The present invention according to claim 18 applies a forcible external load to a structure when the second slope component does not move even when the proximity load is applied in the proximity load application step, and the entire repair wedge member is applied. Is removable from the stop hole and / or wedge hole.
According to the eighteenth aspect of the present invention, the repair wedge member can be removed at an early stage by applying a forced external load.

The method for removing the wedge member for repairing a fatigue crack according to claim 19 is a method for removing the wedge member for repair using a mechanism for removing the wedge member for repairing a fatigue crack, which is fitted to the first slope component. A separation load applying step in which the bolt is screwed in until the tip of the combined bolt abuts on the second slope component to generate a separation load, a motion observation step in which the bolt is further screwed in to observe the movement of the second slope component, and a second step. A movement judgment step to determine if the slope part moves reasonably, and if so, operate the bolt until the wedge load is released to remove the entire repair wedge member from the stop hole and / or wedge hole. It is characterized by having a wedge member removing step.
According to the nineteenth aspect of the present invention, the repair wedge member can be safely and surely removed by generating a separation load by a bolt and removing the repair wedge member when the second slope part moves reasonably. Can be done.

According to claim 20, when it is determined that the movement does not move reasonably as a result of the determination of the movement determination step, it is determined whether or not a load for further expanding the stop hole and / or the wedge hole can be artificially applied. It is characterized in that an artificial load determination step is further provided, and when it is possible to artificially load the load, a load that spreads up and down is artificially applied, and the motion observation step and the motion determination step are repeated.
According to the 20th aspect of the present invention, the repair wedge member can be removed at an early stage by applying an artificial load to the structure.

According to the 21st aspect of the present invention, as a judgment in the artificial load determination step, when it is impossible to artificially load the bolt, an urging means is attached to the bolt between the first slope component and the second slope component. A step of constantly applying a separation load, a step of leaving the structure provided with a stop hole and / or a wedge hole in a state where an external force during operation is applied, and a second step after a certain period of time after the leaving. A second slope component operation determination step for determining the operation of the slope component is further provided, and when it is determined that the second slope component has been activated, the wedge member removal step is executed and it is determined that the second slope component has not been activated. If so, it is characterized in that the leaving step and the second slope component operation determination step are repeated.
According to the 21st aspect of the present invention, when an excessive tensile load is applied to the stop hole and / or the wedge hole, the wedge load is released, and the urging load applied to the bolt causes the second slope component to be the first. Can be kept away from slope parts.

According to the mechanism for removing the fatigue crack repair wedge member of the present invention, the repair wedge member is removed from the stop hole and / or the wedge hole by applying a removal load by the removal load applying means. The member can be removed safely and reliably.

Further, as mounting load applying means, a bolt that applies a separation load in a direction that separates a second slope part that fits into a bolt female screw formed on the first slope part, and as a removal load applying means, a first slope part. When the second slope part is provided with a proximity load applying means for applying a proximity load in a direction in which the second slope component is close to each other, and a proximity load is applied by the proximity load applying means when the repair wedge member is removed from the stop hole and / or the wedge hole. By applying a proximity load by the proximity load applying means at the time of removal, the repair wedge member can be safely and surely removed.

Further, as the proximity load applying means, a removal bolt that also serves as a locking means for locking the first slope part and the second slope part, and a long hole through which the removal bolt opened in the first slope part freely penetrates. And, when the removal bolt formed on the second slope part has a female screw for fitting the removal bolt, the proximity load is obtained by rotating the removal bolt fitted to the female screw for the removal bolt through the elongated hole. The second slope component can be attracted in a direction close to the first slope component. Further, by using the removing bolt as the locking means, it is possible to prevent the second slope component fitted in the stop hole and / or the wedge hole from falling off.

Further, as a means for applying a proximity load, a U-shaped rod having a male screw at the end and mounted around the second slope component and a U-shaped rod that abuts on the first slope component to sandwich the second slope component penetrates. When a plate having a through hole to be formed and a nut to be fitted to the male screw of the U-shaped rod are provided, the first slope part and the second slope part are sandwiched between the U-shaped rod and the plate and the nut is tightened. A proximity load can be applied to pull the second slope component toward the first slope component.

Further, as the mounting load applying means, the proximity load applying means for applying the proximity load in the direction in which the first slope component and the second slope component are close to each other, and as the removal load applying means, the bolt female screw formed on the first slope component. If the second slope part to be fitted is equipped with a bolt that applies a separation load in the direction of separation, and the separation load is applied by the bolt when the repair wedge member is removed from the stop hole and / or the wedge hole, it is removed. Sometimes, by applying a separation load with bolts, the repair wedge member can be safely and surely removed.

Further, when the proximity load applying means is provided with an elastic band mounted around the first slope component and the second slope component to generate tension, the proximity load can be easily and easily always applied with a compact configuration. .. Further, since the first slope part and the second slope part are connected by an elastic band, the work of attaching the repair wedge member to the stop hole and / or the wedge hole is facilitated, and the second slope part is prevented from falling off. Can be used safely.

Further, as the proximity load applying means, an elastic band mounted around the first slope part and the second slope part to generate tension, an initial tightening bolt penetrating a long hole made in the first slope part, and a second When the initial tightening bolt female screw to which the initial tightening bolt formed on the slope component is fitted is provided, a proximity load can be applied by the elastic band and the initial tightening bolt. Further, since the first slope part and the second slope part are connected by the elastic band and the initial tightening bolt, the work of mounting the repair wedge member to the stop hole and / or the wedge hole becomes easy, and the second slope part Can be used safely by preventing it from falling off.

Further, as a proximity load applying means, a U-shaped rod having a male screw at the end and mounted around the second slope component and a U-shaped rod that abuts on the first slope component to sandwich the second slope component and penetrates the U-shaped rod. If a plate with a through hole, a nut that fits into the male screw of a U-shaped rod, and a spring that is mounted between the plate and the nut are provided, the close load is applied by tightening the nut and compressing the spring. Can be given at all times. Further, since the first slope part and the second slope part are connected by a U-shaped rod, the second slope part can be prevented from falling off and can be used safely.

Further, according to the method of mounting the wedge member for repairing fatigue cracks of the present invention, by having the locking step using the removing bolt, the second slope component when fitting into the stop hole and / or the wedge hole is the first. 1 Relative positioning with respect to slope parts can be easily and reliably performed, and an appropriate wedge load can be generated.

In addition, after the wedge load generation step, it is determined whether the removal bolt will continue to be used as the locking means, and if it is not used, the removal bolt is temporarily removed. By removing the removal bolts accordingly, it is possible to follow the opening displacement of the stop hole and / or the wedge hole without hindering the fluctuation of the relative position of the second slope component with respect to the first slope component.

Further, according to the method of mounting the wedge member for repairing fatigue cracks of the present invention, the elastic band mounting step of hanging the elastic band around the first slope component and the second slope component and the position adjusting step using bolts are performed. By having the second slope component, the relative positioning of the second slope component with respect to the first slope component at the time of fitting into the stop hole and / or the wedge hole can be easily and surely performed, and an appropriate wedge load can be generated. Further, a close load can be constantly applied to the repair wedge member fitted in the stop hole and / or the wedge hole by the tension of the elastic band.

Further, according to the method for removing the fatigue crack repair wedge member of the present invention, the repair wedge member can be safely and surely removed by operating the proximity load applying means.

Further, in the proximity load applying step, when the removal bolt is screwed into the removal bolt female screw and a proximity load is applied in the direction in which the first slope part and the second slope part are close to each other, the removal bolt is fitted into the removal bolt female screw through the elongated hole. By rotating the combined removal bolt, the second slope component can be pulled toward the first slope component.

In addition, when the removal bolt is once removed, if the removal bolt is to be fitted to the removal bolt female screw before the proximity load application step, the proximity load can be increased by fitting the removal bolt to the removal bolt female screw in advance. Can be prepared for grant.

Further, in the proximity load applying step, a U-shaped rod is inserted between the stop hole and / or the wedge hole and the first slope part and the second slope part and hooked on the back side of the second slope part, and the plate is used as the first slope part. Attach it so that the end faces the front from the through hole, fit the nut to the male screw at the end and screw it in, and the first slope part and the second slope part approach each other through the plate. When applying a load, a proximity load is applied by sandwiching the first slope part and the second slope part between a U-shaped rod and a plate and tightening a nut, and the second slope part is pulled toward the first slope part. be able to.

Further, in the proximity load applying step, an urging means mounting step for mounting the urging means for applying the urging load to the proximity load applying means is further provided when the second slope component does not move even if the proximity load is applied. By constantly applying an urging load in the direction in which the first slope part and the second slope part are close to each other by the urging means, the entire repair wedge member is stopped by the probabilistic external load acting on the structure. When it is removable from the hole and / or wedge hole, the wedge load is released when an excessive tensile load is applied to the stop hole and / or wedge hole, and the urging load applied to the proximity load applying means causes the first. 2 Slope parts can be attracted to the first slope.

Further, when a coil spring or a leaf spring is used as the urging means, an appropriate urging load can be continuously applied with a simple configuration.

Further, in the proximity load applying step, when the second slope part does not move even if the proximity load is applied, a forced external load is applied to the structure, and the entire repair wedge member is stopped and / or wedged. When it is possible to remove it from the hole, the repair wedge member can be removed at an early stage by applying a forced external load.

Further, according to the method for removing the fatigue crack repair wedge member of the present invention, the repair wedge member is removed by generating a separation load with a bolt and removing the repair wedge member when the second slope part moves reasonably. Can be removed safely and securely.

In addition, if it is determined that the movement does not move reasonably as a result of the determination of the movement determination step, an artificial load determination step of determining whether or not a load for expanding the stop hole and / or the wedge hole can be artificially applied is further added. If it is possible to prepare and artificially load, artificially load a load that spreads up and down, and if the motion observation step and the motion judgment step are repeated, an artificial load is applied to the structure. The repair wedge member can be removed at an early stage.

In addition, as a judgment in the artificial load determination step, when it is impossible to artificially load, a urging means is attached to the bolt and a separation load is always applied between the first slope part and the second slope part. The step of constantly applying the separation load, the step of leaving the structure provided with the stop hole and / or the wedge hole in a state where an external force during operation is applied, and the step of leaving the structure to be left unattended, and determining the operation of the second slope component after a certain period of time after the leaving Further provided with a second slope component operation determination step, if it is determined that the second slope component has been activated, the wedge member removal step is executed, and if it is determined that the second slope component has not been activated, it is referred to as a neglected step. When the second slope component operation determination step is repeated, the wedge load is released when an excessive tensile load is applied to the stop hole and / or the wedge hole, and the second slope component is moved by the urging load applied to the bolt. 1 Can be kept away from slope parts.

The figure which shows the state which attached the removal mechanism of the wedge member for repairing a fatigue crack by 1st Embodiment of this invention to a repair member. Flow of installation method of wedge member for repairing fatigue cracks using the same removal bolt The figure which shows the state which attached the removal mechanism of the wedge member for repairing a fatigue crack by the 2nd Embodiment to a repair member. The figure which shows the state which attached the removal mechanism of the wedge member for repairing a fatigue crack by the 3rd Embodiment to a repair member. Flow of how to remove the wedge member for repairing fatigue cracks using the same removal bolt Part 1 Flow of how to remove the wedge member for repairing fatigue cracks using the same U-shaped rod Part 2 Flow of how to remove the wedge member for repairing fatigue cracks using the U-shaped rod and urging means Part 3 The figure which shows the state which attached the removal mechanism of the wedge member for repairing a fatigue crack by the 4th Embodiment to the wedge member for repair. Flow of installation method of wedge member for repairing fatigue cracks in the fourth embodiment The figure which shows the state which attached the removal mechanism of the wedge member for repairing a fatigue crack by the 5th Embodiment to the wedge member for repair. Flow of installation method of wedge member for repairing fatigue cracks in the fifth embodiment The figure which shows the repair wedge member before attaching the removal mechanism of the fatigue crack repair wedge member by the sixth embodiment. Flow of installation method of wedge member for repairing fatigue cracks in the sixth embodiment The figure which shows the state which attached the removal mechanism of the wedge member for repairing a fatigue crack by the 7th Embodiment attached to the wedge member for repair. The figure which shows the state which attached the removal mechanism of the wedge member for repairing a fatigue crack by 8th Embodiment to the wedge member for repair. Flow of how to remove the wedge member for repairing the fatigue crack Part 4 Flow of how to remove the wedge member for repairing the fatigue crack Part 5 The figure which shows the state which the wedge member for repairing a fatigue crack was fitted in the stop hole.

Hereinafter, a mechanism for removing the fatigue crack repairing wedge member, a method for mounting the fatigue crack repairing wedge member, and a method for removing the fatigue crack repairing wedge member according to the embodiment of the present invention will be described.

FIG. 1 is a view showing a state in which the removal mechanism of the fatigue crack repair wedge member according to the first embodiment is attached to the repair wedge member, FIG. 1 (a) is a front view, and FIG. 1 (b) is B. −B'Cross section. In order to make the structure easy to understand, in FIG. 1B, the slope part and the base material plate are shown in cross section, and the bolt is a sketch.
The repair wedge member 10 includes a first slope component 11 having a slope, a second slope component 12 having a slope sliding on the first slope component 11, and a bolt female screw formed on the first slope component 11. A bolt 14 that fits into 13 and applies a separation load in a direction that separates the second slope component 12 is provided.
The first slope component 11 has a substantially L-shape in side view, and includes a parallel portion 11A arranged in parallel with the base material plate 1 and a fitting portion 11B to be inserted into the stop hole 3. The female screw 13 of the bolt is formed in the parallel portion 11A. The height of the fitting portion 11B becomes smaller as it is closer to the parallel portion 11A, and the contact surface of the fitting portion 11B with the second slope component 12 is a slope (upward to the right in FIG. 1B).
The second slope component 12 has a quadrangular shape, and the height becomes larger as it is closer to the parallel portion 11A, and the contact surface of the first slope component 11 with the fitting portion 11B is a slope. The inclination angle α of the slope of the second slope component 12 is the same as the inclination angle α of the slope of the first slope component 11, and both slopes are in close contact with each other. Further, the slope angle α of the first slope component 11 and the second slope component 12 is smaller than 45 degrees.
The bolt 14 is provided in a direction in which the first slope component 11 and the second slope component 12 are separated from each other as a mounting load applying means for applying a load in the direction in which the second slope component 12 slides on the first slope component 11 and slides up. Apply a separation load.
The bolt female screw 13 formed on the first slope component 11 penetrates from the front surface to the rear surface of the parallel portion 11A of the first slope component 11, and the shaft portion of the bolt 14 is longer than the bolt female screw 13. Therefore, the shaft portion of the bolt 14 screwed into the female screw 13 from the front side (front side) of the parallel portion 11A protrudes from the rear surface of the parallel portion 11A of the first slope component 11, and the tip thereof hits the second slope component 12. The second slope component 12 can be brought into contact with the stop hole 3. In the present embodiment, a hexagon socket head cap screw is used as the bolt 14, but the type of bolt that can be used is arbitrary and is not limited to the hexagon socket head cap screw.

When a fatigue crack 2 occurs in the base material plate 1 of a structure such as a ship, an offshore structure, or a bridge, a stop hole 3 is provided at the tip of the fatigue crack 2, and a repair wedge member 10 is fitted in the stop hole 3. A wedge load W is applied to the hole end portion of the stop hole 3 by applying a torque N1 in the tightening direction to the bolt 14 to rotate the bolt 14. As a result, the stress fluctuation width of the structure can be suppressed.
However, if the repair wedge member 10 is erroneously tightened at the time of installation, or if a large wedge load W acts after the installation, it may be difficult to remove the repair wedge member 10 from the stop hole 3. is there.
Therefore, when the repair wedge member 10 is removed from the stop hole 3, the repair wedge member removal mechanism is used.

The removal mechanism includes a proximity load applying means as a removing load applying means in which the second slope component 12 slides on the first slope component 11 and applies a load in a downward direction. The proximity load applying means applies a proximity load as a removal load in a direction in which the first slope component 11 and the second slope component 12 are close to each other.
In the present embodiment, the removal bolt 21, the elongated hole 22 provided in the first slope component 11, and the female screw 23 of the removal bolt provided in the second slope component 12 are provided as the proximity load applying means.
The removal bolt 21 can also serve as a locking means for locking the first slope component 11 and the second slope component 12. The diameter of the shaft portion of the removal bolt 21 is smaller than the diameter of the elongated hole 22, and the bolt 21 can move freely in the elongated hole 22.
The elongated hole 22 formed in the first slope component 11 penetrates from the front surface to the rear surface of the parallel portion 11A of the first slope component 11. The elongated hole 22 is formed above the female screw 13 of the bolt.
The female screw 23 for the removal bolt is formed on the front side of the second slope component 12 at a height corresponding to the elongated hole 22. The tip of the removal bolt 21 protruding from the elongated hole 22 is fitted to the female screw 23 of the removal bolt.
In the present embodiment, a hexagon socket head cap screw is used as the removal bolt 21, but the type of bolt that can be used is arbitrary and is not limited to the hexagon socket head cap screw.
Further, the number of the removing bolts 21 does not necessarily have to be one, and the number of the removing bolts 21 can be increased as needed to improve the stability and strength. When the number of the removal bolts 21 is increased, the corresponding elongated holes 22 and the female screws 23 for the removal bolts are also added.

FIG. 2 is a flow of a method of installing a wedge member for repairing a fatigue crack using a removal bolt in the first embodiment.
First, the second slope component 12 is mounted on the first slope component 11 (S1: mounting step). In the mounting step S1, the bolt 14 is removed or the tip of the bolt 14 is prevented from protruding from the rear surface of the parallel portion 11A of the first slope component 11.
After the mounting step S1, the removal bolt 21 is passed through the elongated hole 22 of the first slope component 11 and the tip is turned into the removal bolt female screw 23 of the second slope component 12, and the first slope component 11 and the second slope are used. The component 12 is locked (S2: locking step). By fastening both slope parts, the relative positioning of the second slope part 12 with respect to the first slope part 11 when fitting into the stop hole 3 can be easily and surely performed. The relative position can be adjusted by the amount of turning of the removal bolt 21, but the heights of the locked first slope component 11 and second slope component 12 are adjusted to be slightly smaller than the diameter of the stop hole 3. It is preferable to do so.
After the locking step S2, the locked first slope component 11 and the second slope component 12 are fitted into the stop hole 3 provided at the tip of the fatigue crack 2 generated in the base material plate 1 (S3: fitting step). ). In the fitting step S3, the depth of the locked first slope component 11 and the second slope component 12 to be inserted into the stop hole 3 and the angle with respect to the crack (see FIG. 1) are adjusted.
After the fitting step S3, the bolt 14 is turned into the bolt female screw 13 of the first slope component 11 to bring the tip of the bolt 14 into contact with the front surface of the second slope component 12 (S4: bolt tip contact step).
After the bolt tip contact step S4, the removal bolt 21 is sufficiently loosened (S5: removal bolt loosening step). As a result, it is possible to prevent the second slope component 12 from being hindered from freely rising.
After the removal bolt relaxation step S5, the bolt 14 is turned to apply a separation load, and the second slope component 12 is raised onto the first slope component 11 to generate a wedge load W (S6: wedge load generation). Step). The separation load is adjusted by the amount of turning of the bolt 14 in contact with the second slope component 12.

After the wedge load generation step S6, it is determined whether or not the removal bolt 21 is used as the locking means (S7: Handling determination step of the removal bolt).
When it is determined in the removal bolt handling determination step S7 that the removal bolt 21 is not used as the locking means, the removal bolt 21 is temporarily removed from the elongated hole 22 (S8: removal bolt removal step). By removing the removal bolt 21 as needed, it is possible to prevent the second slope component 12 from being hindered from freely rising, and it is possible to follow the opening displacement of the stop hole 3.
On the other hand, when it is determined in the removal bolt handling determination step S7 that the removal bolt 21 is used as the locking means, the movement of the second slope component 12 when following the opening displacement of the stop hole 3 is not hindered. The removal bolt 21 is used as a locking means in a sufficiently loosened state (S9: locking means step). If necessary, the removal bolt 21 is replaced with a longer bolt to serve as a locking means. By fitting the removal bolt 21 to the female screw 23 of the removal bolt in a sufficiently loosened state, the second slope part 12 can be prevented from falling off without hindering the free ascent of the second slope part 12. Can be used as a locking means for.

FIG. 3 is a view showing a state in which the removal mechanism of the fatigue crack repair wedge member according to the second embodiment is attached to the repair wedge member, FIG. 3 (a) is a front view, and FIG. 3 (b) is a right side. FIG. 3 (c) is a sectional view taken along the line AA'. In order to make the structure easy to understand, in FIGS. 3 (b) and 3 (c), the slope part and the base material plate are shown in cross section, and the removal mechanism is a sketch. The same functional members as those in the above-described embodiment are designated by the same reference numerals, and the description thereof will be omitted.
In the present embodiment, as the proximity load applying means, a U-shaped rod 25 having a male screw 24 and mounted around the second slope component 12 and a quadrangular plate 26 having circular through holes at two left and right ends are provided. And a nut 27 that fits into the male screw 24 of the U-shaped rod 25.
Male screws 24 are provided at both ends of the U-shaped rod 25, respectively. The U-shaped rod 25 is sized to hold the first slope component 11 and the second slope component 12, and its end portion is arranged on the front side of the parallel portion 11A of the first slope component 11.
The plate 26 is arranged in contact with the front surface of the parallel portion 11A of the first slope component 11 in order to sandwich the second slope component 12 with the male screw 24 inserted through the through hole. A flat washer 28 is arranged between the nut 27 and the plate 26.
The U-shaped rod 25 may be, for example, a semi-U-shaped rod such as a fishing hook, and a male screw 24 may be provided at the end. Further, the U-shaped bar 25 may be formed entirely of a round bar, or may be formed of a round bar only at one end and a square bar at the other ends, and male threads 24 may be provided at both ends. Further, the parallel portion 11A of the first slope component 11 can be projected to also serve as the plate 26.

FIG. 4 is a view showing a state in which the removal mechanism of the fatigue crack repair wedge member according to the third embodiment is attached to the repair wedge member, FIG. 4 (a) is a front view, and FIG. 4 (b) is a right side. FIG. 4 (c) is a sectional view taken along the line AA'. In order to make the structure easy to understand, in FIGS. 4 (b) and 4 (c), the slope part and the base material plate are shown in cross section, and the removal mechanism is a sketch. The same functional members as those in the above-described embodiment are designated by the same reference numerals, and the description thereof will be omitted.
In this embodiment, as a proximity load applying means, a U-shaped rod 25 having a male screw 24 and mounted around the second slope component 12, a plate 26 having two circular through holes, and a U-shaped rod It is the same as the second embodiment in that it has a nut 27 fitted to the male screw 24 of 25 and a flat washer 28, and further has an urging means 30 for applying an urging load to the proximity load applying means. It is different from the second embodiment.
The urging means 30 is a coil spring arranged between the plate 26 and the flat washer 28. When the nut 27 is tightened, elastic strain is generated in the coil spring 30 in the compression direction, and a tightening force acts in a direction that narrows the relative distance between the first slope component 11 and the second slope component 12. If left in this state for a certain period of time, a probabilistic external load acts on the structure and the base plate 1 in which the stop hole 3 is opened, but when a relatively excessive tensile load acts among them. The wedge load W is released, the second slope component 12 slides down on the slope of the first slope component 11 due to the tightening force, and even after the excessive tensile load is unloaded, the repair wedge member 10 and the stop hole 3 The wedge load W acting between the upper and lower ends is released, and the repair wedge member 10 can be removed.
As the urging means 30, an elastic body other than the coil spring can be used, but it is particularly preferable to use a coil spring or a leaf spring. As a result, an appropriate urging load can be continuously applied with a simple configuration.

Next, the first slope component 11 and the second slope component 12 are mounted on the stop hole 3, torque N1 is applied and the bolt 14 is tightened to generate a wedge load W, and then the first slope component 11 and the first slope component 11 and the first. 2. A method of removing the slope component 12 when it becomes necessary to remove the slope component 12 from the stop hole 3 will be described.
FIG. 5 is a flow 1 of a method of removing a wedge member for repairing a fatigue crack using a removal bolt.
First, whether or not the repair wedge member is provided with the removal mechanism according to the first embodiment, that is, the removal bolt 21 is provided, the first slope part 11 is formed with an elongated hole 22, and the second slope part 12 is provided. It is determined whether or not the removal bolt female screw 23 is formed in the (S11: removal bolt application determination step).
If it is determined in the removal bolt application determination step S11 that the removal mechanism according to the first embodiment is not provided as in the repair wedge member 10 shown in FIG. 18, the process proceeds to the removal method flow 2 described later. ..
On the other hand, when it is determined in the removal bolt application determination step S11 that the removal mechanism according to the first embodiment is provided, the bolt 14 that applies the separation load to the second slope component 12 is loosened (S12: bolt). Relaxation step). The loosened bolt 14 is preferably removed from the bolt female screw 13.

After the bolt relaxation step S12, it is determined whether or not the removal bolt 21 has been used as the locking means (S13: locking means use determination step).
When it is determined in the locking means use determination step S13 that the removal bolt 21 has been used as the locking means, the proximity load applying means is operated to apply the proximity load (S15: proximity load applying step). In the proximity load applying step S15, the removal bolt 21 fitted to the female screw 23 of the removal bolt is further screwed in, and the second slope component 12 approaches the parallel portion 11A of the first slope component 11 via the plate 26. A proximity load is applied in the direction. By rotating the removal bolt 21 in the direction of screwing it into the female screw 23 of the removal bolt in the state of being inserted into the elongated hole 22, the second slope component 12 is pulled toward the parallel portion 11A of the first slope component 11 and slides. The wedge load W acting between the first slope component 11 and the second slope component 12 and the upper and lower ends of the stop hole 3 is released, and the repair wedge member 10 is safely and surely removed from the stop hole 3. be able to. Even if the second slope component 12 is raised above the first slope component 11 by tightening the bolt 14, the removal bolt 21 can move freely in the elongated hole 22 for removal. The bolt female screw 23 can rotate smoothly without applying an unreasonable load. Further, in the proximity load applying step S15, the movement of the second slope component 12 when the proximity load is applied is observed.
On the other hand, if it is determined in the locking means use determination step S13 that the removal bolt 21 has not been used as the locking means, the removal bolt 21 is inserted into the elongated hole 22 provided in the first slope component 11. The tip of the removal bolt 21 is turned into the removal bolt female screw 23 provided on the second slope component 12 (S14: removal bolt fitting step). After that, the process proceeds to the proximity load applying step S15. When the removal bolt 21 is once removed, by fitting the removal bolt 21 to the female screw 23 of the removal bolt in advance, it is possible to prepare for the application of the proximity load in the proximity load application step S15.

After the proximity load applying step S15, it is determined whether or not the second slope component 12 moves reasonably (S16: second slope component movement determination step). The reason why the second slope component 12 moves reasonably is, for example, a case where there is no possibility that the hole end of the stop hole 3 will be scraped by the movement of the second slope component 12.
If it is determined in the second slope component movement determination step S16 that the second slope component 12 does not move reasonably, the process proceeds to flow 2 of the removal method.
On the other hand, if it is determined in the second slope component movement determination step S16 that the second slope component 12 moves reasonably, the removal bolt 21 is turned until the wedge load W is released, and the entire repair wedge member 10 is used. (S17: Wedge member removal step), and the flow 1 of the removal method is completed.
In this way, when the stop hole 3 is removed, the repair wedge member 10 can be safely and surely removed by applying the proximity load (removal load) by the proximity load applying means (removing load applying means).

FIG. 6 shows a flow 2 of a method of removing a wedge member for repairing a fatigue crack using a U-shaped rod.
In this flow, the removal mechanism according to the second embodiment is used. When shifting from the second slope component movement determination step S16 of the removal method flow 1, the removal bolt 21 is removed from the elongated hole 22 before starting the removal method flow 2.
First, the U-shaped rod 25 is inserted between the stop hole 3 and the first slope component 11 and the second slope component 12, and the bent portion is hooked on the back side (rear surface side) of the second slope component 12. Then, both ends of the U-shaped rod 25 to which the male screw 24 is attached are pulled out from between the stop hole 3 and the first slope component 11 and the second slope component 12 to the front side of the base metal plate 1 (S21: U-shaped). Stick mounting step).
After the U-shaped rod mounting step S21, both ends of the U-shaped rod 25 are passed through the through holes of the plate 26 to fit the nut 27. A flat washer 28 is arranged between the plate 26 and the nut 27. At this time, the mounting state of the plate 26 is a state in which the rear surface is in contact with the front surface of the first slope component 11, and the end portion of the U-shaped rod 25 protruding from the through hole faces the front surface (S22: plate mounting step). ..
After the plate mounting step S22, the nut 27 is screwed in, and a proximity load is applied in the direction in which the first slope component 11 and the second slope component 12 are close to each other via the plate 26 (S23: nut screwing step). In the nut screwing step S23, the nuts 27 are gradually tightened while paying attention so that the tightening forces of the two nuts 27 are substantially equal, and the movement of the second slope component 12 is observed.
The U-shaped rod mounting step S21, the plate mounting step S22, and the nut screwing step S23 are proximity load applying steps in the removal method flow 2.

After the proximity load applying step, it is determined whether or not the second slope component 12 moves reasonably (S24: second slope component movement determination step). The reason why the second slope component 12 moves reasonably is, for example, a case where there is no possibility that the hole end of the stop hole 3 will be scraped by the movement of the second slope component 12.
If it is determined in the second slope component movement determination step S24 that the second slope component 12 moves reasonably, the two nuts 27 are turned until the wedge load W is released, and the entire repair wedge member 10 is moved. It is removed (S25: wedge member removal step), and the removal method flow 2 is completed.
On the other hand, if it is determined in the second slope component movement determination step S24 that the second slope component 12 does not move reasonably, it is determined whether or not a load that expands the stop hole 3 up and down can be artificially applied. (S26: Load-loading availability determination step).

If it is determined in step S26 of whether or not the load can be applied that a load that expands the stop hole 3 up and down can be artificially applied, such a load is applied (S27: load load step). After the load load step S27, the process returns to the nut screwing step S23. In this way, when the second slope component 12 does not move even when a proximity load is applied, a forced external load is applied to the structure so that the entire repair wedge member 10 can be removed from the stop hole 3. As a result, the repair wedge member 10 can be removed at an early stage. For example, when the structure is a machine tool such as a ship, an offshore structure, or a crane, the forced external load increases the load, and when the structure is a bridge or a road, a heavy vehicle is run or a heavy object is placed. It is possible by things such as.
On the other hand, in step S26 of determining whether or not a load can be applied, if it is determined that a load that expands the stop hole 3 up and down cannot be artificially applied, an urging means 30 such as a coil spring is prepared, and the U-shaped rod 25 Loosen the two nuts 27 attached to both ends, remove them together with the flat washers 28, attach the urging means 30 to the tips of both ends of the U-shaped rod 25, and then re-install the nuts 27 and flat washers 28. Install (the step of mounting the urging means). Then, the process proceeds to step S33 of step 3 of the removal method described later.

FIG. 7 is a flow 3 of a method of removing a wedge member for repairing a fatigue crack using a U-shaped rod and an urging means.
In this flow, the removal mechanism according to the third embodiment is used.
First, the U-shaped rod 25 is inserted between the stop hole 3 and the first slope component 11 and the second slope component 12, and the U-shaped bent portion is hooked on the back side of the second slope component 12. Then, both ends of the U-shaped rod 25 to which the male screw 24 is attached are pulled out from between the stop hole 3 and the first slope component 11 and the second slope component 12 to the front side of the base metal plate 1 (S31: U-shaped). Stick mounting step).
After the U-shaped rod mounting step S31, both ends are passed through the through holes of the plate 26, and the urging means 30 and the flat washer 28 are fitted into the protruding tips, and then the nut 27 is fitted. As described above, here, a coil spring is used as the urging means 30. At this time, a flat washer 28 is arranged between the nut 27 and the coil spring 30. A flat washer 28 may be arranged between the plate 26 and the coil spring 30. At this time, the mounted state of the plate 26 is a state in which the rear surface is in contact with the front surface of the first slope component 11, and the end portion of the U-shaped rod 25 protruding from the through hole faces the front surface (S32: mounting of the urging means). Step).
After the urging means mounting step S32, the urging means 30 applies an urging load in a direction in which the first slope component 11 and the second slope component 12 are close to each other (S33: urging load applying step). In the urging load applying step S33, the nuts 27 are gradually tightened while paying attention so that the urging load (tightening force) by the two nuts 27 is substantially equal. As a result, elastic strain (compression strain) is generated in the coil spring 30 in the compression direction, and a tightening force acts in a direction that narrows the relative distance between the first slope component 11 and the second slope component 12.
After the urging load applying step S33, the urging load is left as it is, and the urging means 30 continuously applies the urging load in the direction in which the first slope component 11 and the second slope component 12 are close to each other (S34: urging load) Always grant step). When the base material plate 1 provided with the stop hole 3 is left in a state where an external load (external force) during operation is applied and a large tensile load such as expanding the stop hole 3 is applied, it is relatively relative. When an excessive tensile load was applied to the wedge load W, the wedge load W was released, and the urging load caused the second slope component 12 to slide down on the slope of the first slope component 11, and the excessive tensile load was removed. Even after that, the wedge load W acting between the repair wedge member 10 and the upper and lower ends of the stop hole 3 is released, and the repair wedge member 10 can be removed from the stop hole 3.

After a certain period of time has elapsed from the start of the urging load constant application step S34, it is determined whether or not the second slope component 12 has moved by a predetermined amount (S35: second slope component movement determination step).
If it is determined in the second slope component movement determination step S35 that the second slope component 12 is not moving by a predetermined amount, the urging load constant application step S34 is continued.
On the other hand, when it is determined in the second slope component movement determination step S35 that the second slope component 12 has moved by a predetermined amount, the two nuts 27 are turned until the wedge load W is released, and the repair wedge member 10 The whole is removed (S36: wedge member removal step), and the removal method flow 3 is completed. Before turning the two nuts 27, it may be determined whether or not the second slope component 12 moves reasonably.

Table 1 below is a table summarizing the methods for removing the repair wedge member 10.

In Table 1, Situation 1 is a case where the first slope component 11 and the second slope component 12 are erroneously tightened even though the torque is relatively small, which is less than the target torque, when the first slope component 11 and the second slope component 12 are installed in the stop hole 3. .. In this case, the first slope component 11 and the second slope component 12 can be immediately removed by performing the removal using the removal mechanism according to the first embodiment based on the flow 1 of the removal method.
Further, in the situation example 2, the first slope component 11 and the second slope component 12 are tightened to the target torque and installed in the stop hole 3, and then the first slope component 11 and the second slope component 12 are removed due to a process change. Is. In this case, the wedge load W is larger than that of the situation example 1, but the first slope component 11 and the second are removed by using the removal mechanism according to the second embodiment based on the removal method flow 2. The slope component 12 can be removed immediately.
Further, in the situation example 3, the repair wedge member 10 continuously applies a torque in the direction in which the second slope component 12 rises onto the first slope component 11 as described in the above-mentioned Patent Document 1. As a result, when an excessive load in the direction in which the fatigue crack 2 opens acts on the base metal plate 1 after installation and the stop hole 3 is greatly stretched in the load direction, an appropriate wedge load W is automatically applied. This is the case when the adjusting means is provided. In this case, the wedge load W is larger than that of the situation example 2, but it is constant after the removal work is started by performing the removal using the removal mechanism according to the third embodiment based on the removal method flow 3. After the period has elapsed, the first slope component 11 and the second slope component 12 can be removed.

In the above embodiment, the removal method flow 1 to the removal method flow 2 and the removal method flow 2 to the removal method flow 3 have been described, but the present invention is limited to this. Instead, the flow of each removal method can be performed independently.

Further, in the above embodiment, an example in which the urging means 30 is attached to the U-shaped rod 25 has been described, but the urging means 30 is attached to the removing bolt 21 described in the removing mechanism according to the first embodiment. You can also do it. The urging means 30 in this case is a torque load mechanism that continuously applies torque in the tightening direction to the removal bolt 21. A torque load mechanism is provided and the device is left to stand for a certain period of time, and the repair wedge member 10 is removed after waiting for an excessive tensile load to act on the stop hole 3 to release the wedge load W. As such a torque load mechanism, the same one as the automatic adjusting means described in Patent Document 1 can be used.

Further, in the above embodiment, the repair wedge member 10 applied to the stop hole 3 provided at the tip of the fatigue crack 2 and the removal mechanism thereof have been described, but the repair wedge member 10 and the removal mechanism thereof are described. Similarly, a wedge hole which is a drill hole provided on a crack path other than the base portion and the tip portion of the fatigue crack 2 can be used in the same manner. In addition, the stop hole 3 and the wedge hole can be installed side by side and used for both.

Further, the removal mechanism of the repair wedge member 10 generates a wedge load W by mounting the first slope component 11 and the second slope component 12 in the stop hole 3 or the wedge hole and tightening the bolt 14. When it becomes necessary to reduce the wedge load W, it can also be used as a means for bringing the second slope component 12 closer to the rear surface of the parallel portion 11A of the first slope component 11.

FIG. 8 is a view showing a state in which the removal mechanism of the fatigue crack repair wedge member according to the fourth embodiment is attached to the repair wedge member, FIG. 8 (a) is a front view, and FIG. 8 (b) is B. −B'Cross section. In order to make the structure easy to understand, in FIG. 8B, the slope part and the base plate are shown in cross section, and the bolt and the elastic band are sketches. The same functional members as those in the above-described embodiment are designated by the same reference numerals, and the description thereof will be omitted.
The repair wedge member 100 includes a first slope component 110 having a slope, a second slope component 120 having a slope sliding on the first slope component 110, and a second slope component 120 being the first slope component 110. A mounting load applying means for applying a load in a direction of sliding up is provided.
The first slope component 110 has a substantially L-shape in side view, and includes a parallel portion 110A arranged in parallel with the base material plate 1 and a fitting portion 110B to be inserted into the stop hole 3. A bolt female screw 130 is formed in the parallel portion 110A. The height of the fitting portion 110B increases as it approaches the parallel portion 110A, and the contact surface of the fitting portion 110B with the second slope component 120 is a slope (downward to the right in FIG. 8B).
The second slope component 120 has a quadrangular shape, and the height becomes smaller as it is closer to the parallel portion 110A, and the contact surface of the first slope component 110 with the fitting portion 110B is a slope. The inclination angle α of the slope of the second slope component 120 is the same as the inclination angle α of the slope of the first slope component 110, and both slopes are in close contact with each other. Further, the slope angle α of the first slope component 110 and the second slope component 120 is smaller than 45 degrees.
In the present embodiment, as the mounting load applying means, a proximity load applying means for applying a proximity load in a direction in which the first slope component 110 and the second slope component 120 are close to each other is provided. The proximity load applying means are two elastic bands 150 that are mounted around the first slope component 110 and the second slope component 120 to generate tension T. One elastic band 150A is annularly hung around the first slope component 110 and the second slope component 120 above the bolt female screw 130, and the other elastic band 150B is annularly first above the bolt female screw 130. It is hung around the slope component 110 and the second slope component 120. As a result, a proximity load can be easily applied at all times with a compact configuration. Further, since the first slope component 110 and the second slope component 120 are connected by the elastic band 150, the work of attaching the repair wedge member 100 to the stop hole 3 becomes easy, and the second slope component 120 is prevented from falling off. It can be prevented and used safely. In addition to the rubber band, a spring or the like can also be used for the elastic band 150.

When a fatigue crack 2 occurs in the base material plate 1 of a structure such as a ship, an offshore structure, or a bridge, a stop hole 3 is provided at the tip of the fatigue crack 2, and a repair wedge member 100 is fitted in the stop hole 3. A wedge load W is applied to the hole end portion of the stop hole 3 by raising the second slope component 120 onto the first slope component 110 with the tension T of the elastic band 150. As a result, the stress fluctuation width of the structure can be suppressed.
However, if the repair wedge member 100 is accidentally tightened at the time of installation, or if a large wedge load W acts after the installation, it may be difficult to remove the repair wedge member 100 from the stop hole 3. is there.
Therefore, when the repair wedge member 100 is removed from the stop hole 3, the repair wedge member removal mechanism is used.

The removal mechanism of the present embodiment is provided on a bolt female screw 130 formed on the first slope component 110 as a removal load applying means for applying a load in a direction in which the second slope component 120 slides on the first slope component 110 and slides down. A bolt 140 that fits and applies a separation load in a direction that separates the second slope component 120 is provided.
The bolt female screw 130 formed on the first slope component 110 penetrates from the front surface to the rear surface of the parallel portion 110A of the first slope component 110, and the shaft portion of the bolt 140 is longer than the bolt female screw 130. Therefore, the shaft portion of the bolt 140 screwed into the female screw 130 from the front side (front side) of the parallel portion 110A protrudes from the rear surface of the parallel portion 110A of the first slope component 110, and the tip hits the second slope component 120. The second slope component 120 can be pressed in contact with it. In the present embodiment, a hexagon socket head cap screw is used as the bolt 140, but the type of bolt that can be used is arbitrary and is not limited to the hexagon socket head cap screw.

FIG. 9 is a flow of a method of installing a wedge member for repairing fatigue cracks in the fourth embodiment.
First, the second slope component 120 is mounted on the first slope component 110 (S41: mounting step S41).
After the mounting step S41, the elastic band 150 is hung around the first slope component 110 and the second slope component 120 to generate the tension T (S42: elastic band mounting step).
In the mounting step S41 and the elastic band mounting step S42, the bolt 140 is removed or the tip is prevented from protruding from the rear surface of the parallel portion 110A of the first slope component 110.
After the elastic band mounting step S42, the bolt 140 is operated in the screwing direction, the tip of the bolt 140 is brought into contact with the front surface of the second slope component 120, and the positional relationship between the first slope component 110 and the second slope component 120 is adjusted. Adjust (S43: position adjustment step). As a result, the relative positioning of the second slope component 120 with respect to the first slope component 110 when fitting into the stop hole 3 can be easily and reliably performed. The relative position can be adjusted by the amount of tightening of the bolt 140, but the height of the first slope component 110 and the second slope component 120 is the stop hole so that the repair wedge member 100 passes through the stop hole 3 at the last minute. It is preferable to adjust the diameter to a degree slightly smaller than the diameter of 3.
The elastic band 150 is always provided with an appropriate tension T from the time when it is first hung around the first slope part 110 and the second slope part 120 to the time when the bolt 140 is turned and relative positioning is performed. Design the dimensions of the slope part, the dimensions of the elastic band 150, the material, etc. so that As a result, even if the stop hole 3 is deformed after installation, the repair wedge member 100 follows and extends, and an appropriate wedge load can be maintained. Further, the slope component has a sufficient distance between the rear surface of the parallel portion 110A of the first slope component 110 and the front surface of the second slope component 120 when the bolt 140 is turned to perform relative positioning. Design the dimensions and shape. As a result, even if the stop hole 3 is deformed after installation, the repair wedge member 100 follows and extends, and an appropriate wedge load can be maintained.
After the position adjusting step S43, the first slope component 110 and the second slope component 120 locked by the elastic band 150 are fitted into the stop hole 3 (S44: fitting step). In the fitting step S44, the depth of the first slope component 110 and the second slope component 120 to be inserted into the stop hole 3 and the angle with respect to the crack (see FIG. 8) are adjusted.
After the fitting step S44, the bolt 140 is operated in the loosening direction to raise the second slope component 120 onto the first slope component 110 by the tension T of the elastic band 150 to generate a wedge load W (S45: wedge load). Occurrence step). In the wedge load generation step S45, the bolt 140 is returned to a position where the tip does not protrude from the first slope component 110.

10A and 10B are views showing a state in which the removal mechanism of the fatigue crack repairing wedge member according to the fifth embodiment is attached to the repairing wedge member, FIG. 10A is a front view, and FIG. 10B is a B. −B'Cross section. In order to make the structure easy to understand, in FIG. 10B, the slope part and the base material plate are shown in cross section, and the bolt and the elastic band are sketches. The same functional members as those in the above-described embodiment are designated by the same reference numerals, and the description thereof will be omitted.
The repair wedge member 100 in the present embodiment is opened to the elastic band 150, which is mounted around the first slope component 110 and the second slope component 120 to generate tension T, and the first slope component 110, as means for applying a proximity load. It differs from the repair wedge member 100 in the fourth embodiment in that it includes an initial tightening bolt 170 penetrating the elongated hole 160 and an initial tightening bolt female screw 180 formed on the second slope component 120.
In the present embodiment, there is only one elastic band 150, which is annularly hung around the first slope component 110 and the second slope component 120 below the bolt female screw 130.
The diameter of the shaft portion of the initial tightening bolt 170 is smaller than the diameter of the slot 160, and the bolt 170 can move freely in the slot 160.
The elongated hole 160 formed in the first slope component 110 penetrates from the front surface to the rear surface of the parallel portion 110A of the first slope component 110. The elongated hole 160 is formed above the female screw 130 of the bolt.
The initial tightening bolt female screw 180 is formed on the front side of the second slope component 120 at a height corresponding to the elongated hole 160. The tip of the initial tightening bolt 170 protruding from the elongated hole 160 is fitted to the female screw 180 of the initial tightening bolt.
In the present embodiment, a proximity load can be applied by the elastic band 150 and the initial tightening bolt 170. Further, since the first slope component 110 and the second slope component 120 are connected by the elastic band 150 and the initial tightening bolt 170, the work of mounting the repair wedge member 100 to the stop hole 3 becomes easy, and the second slope It can be used safely by preventing the component 120 from falling off.
In the present embodiment, a hexagon socket head cap screw is used as the initial tightening bolt 170, but the type of bolt that can be used is arbitrary and is not limited to the hexagon socket head cap screw.

Similar to the fourth embodiment, the removal mechanism of the present embodiment is a first slope component as a removal load applying means for applying a load in the direction in which the second slope component 120 slides on the first slope component 110 and slides down. A bolt 140 that fits into the bolt female screw 130 formed on the 110 and applies a separation load in a direction that separates the second slope component 120 is provided.

FIG. 11 is a flow of a method of installing a wedge member for repairing fatigue cracks in the fifth embodiment.
First, the second slope component 120 is mounted on the first slope component 110 (S51: mounting step).
After the mounting step S51, the elastic band 150 is hung around the first slope component 110 and the second slope component 120 to generate the tension T (S52: elastic band mounting step).
In the mounting step S51 and the elastic band mounting step S52, the bolt 140 is removed or the tip is prevented from protruding from the rear surface of the parallel portion 110A of the first slope component 110.
After the elastic band mounting step S52, the bolt 140 is operated in the screwing direction to adjust the positional relationship between the first slope component 110 and the second slope component 120 (S53: position adjustment step). As a result, the relative positioning of the second slope component 120 with respect to the first slope component 110 when fitting into the stop hole 3 can be easily and reliably performed. The relative position can be adjusted by the amount of tightening of the bolt 140, but the height of the first slope component 110 and the second slope component 120 is the stop hole so that the repair wedge member 100 passes through the stop hole 3 at the last minute. It is preferable to adjust the diameter to a degree slightly smaller than the diameter of 3.
After the position adjusting step S53, the first slope component 110 and the second slope component 120 locked by the elastic band 150 are fitted into the stop hole 3 (S54: fitting step). In the fitting step S54, the depth of the first slope component 110 and the second slope component 120 to be inserted into the stop hole 3 and the angle with respect to the crack (see FIG. 10) are adjusted.
After the fitting step S54, the initial tightening bolt 170 is passed through the elongated hole 160 of the first slope component 110, and the tip is turned into the initial tightening bolt female screw 180 of the second slope component 120 (S55: initial tightening bolt insertion step). ).
After the initial tightening bolt insertion step S55, the bolt 140 is operated in the loosening direction, and the proximity load is applied by the tension T of the elastic band 150 and the proximity load is applied by turning the initial tightening bolt 170 in the tightening direction. , The second slope component 120 is raised onto the first slope component 110 to generate a wedge load W (S56: wedge load generation step). In the wedge load generation step S56, the bolt 140 is returned to a position where the tip does not protrude from the first slope component 110.

After the wedge load generation step S56, it may be determined whether or not the initial tightening bolt 170 is used as the locking means.
When it is determined that the initial tightening bolt 170 is not used as the locking means, the initial tightening bolt 170 is temporarily removed from the elongated hole 160. By removing the initial tightening bolt 170 as needed, it is possible to prevent the second slope component 120 from being hindered from freely rising, and it is possible to follow the opening displacement of the stop hole 3.
On the other hand, when it is determined that the initial tightening bolt 170 is used as the locking means, the initial tightening bolt 170 is sufficiently loosened so as not to hinder the movement of the second slope component 120 when following the opening displacement of the stop hole 3. It is used as a locking means in the folded state. If necessary, the initial tightening bolt 170 is replaced with a longer bolt to serve as a locking means. By fitting the initial tightening bolt 170 to the female screw 180 of the initial tightening bolt in a sufficiently loosened state, it is possible to prevent the second slope part 120 from falling off without preventing the second slope part 120 from freely rising. It can be used as a locking means for the above.

FIG. 12 is a view showing a repair wedge member before attaching the removal mechanism of the fatigue crack repair wedge member according to the sixth embodiment, FIG. 12 (a) is a front view, and FIG. 12 (b) is a right view. FIG. 12 (c) is a cross-sectional view taken along the line AA'. In order to make the structure easy to understand, in FIGS. 12 (b) and 12 (c), the slope parts and the base material plate are represented by cross sections, and the U-shaped rods and the like are sketches. The same functional members as those in the above-described embodiment are designated by the same reference numerals, and the description thereof will be omitted.
The repair wedge member 100 in the present embodiment has a U-shaped rod 191 having a male screw 190 and being mounted around the second slope component 120 as a proximity load applying means, and circular through holes at two positions at the left and right ends. The repair wedge in the fourth embodiment in that it has a quadrangular plate 192, a nut 193 that fits into the male screw 190 of the U-shaped rod 191 and a spring 194 that is mounted between the plate 192 and the nut 193. Different from member 100.
Male screws 190 are provided at both ends of the U-shaped rod 191. The U-shaped rod 191 is sized to hold the first slope component 110 and the second slope component 120, and its end portion is arranged on the front side of the parallel portion 110A of the first slope component 110.
The plate 192 is arranged in contact with the front surface of the parallel portion 110A of the first slope component 110 in order to sandwich the second slope component 120 with the male screw 190 inserted through the through hole. A flat washer 195 is arranged between the nut 193 and the plate 192.
The U-shaped rod 191 may have a semi-U-shaped shape such as a fishing hook, and a male screw 190 may be provided at the end. Further, the U-shaped bar 191 may be formed entirely of a round bar, or may be formed of a round bar only at one end and a square bar at the other ends, and male threads 190 may be provided at both ends. Further, the parallel portion 110A of the first slope component 110 can be projected to also serve as the plate 192.
The spring 194 is, for example, a coil spring and is arranged between the plate 192 and the flat washer 195. When the nut 193 is tightened, elastic strain is generated in the spring 194 in the compression direction, and a tightening force acts in a direction that narrows the relative distance between the first slope component 110 and the second slope component 120.
As the spring 194, an elastic body other than the coil spring can be used, but it is particularly preferable to use a coil spring or a leaf spring. As a result, an appropriate proximity load can be continuously applied with a simple configuration.
In the present embodiment, the proximity load can be constantly applied by tightening the nut 193 and compressing the spring 194. Further, since the first slope component 110 and the second slope component 120 are connected by the U-shaped rod 191, the second slope component 120 can be prevented from falling off and can be used safely.

Similar to the fourth and fifth embodiments, the removal mechanism of the present embodiment is used as a removal load applying means for applying a load in the direction in which the second slope component 120 slides on the first slope component 110 and slides down. A bolt 140 is provided which is fitted to a bolt female screw 130 formed on the slope component 110 and applies a separation load in a direction for separating the second slope component 120. In FIG. 12, the bolt 140 is not shown because it is in a removed state.

FIG. 13 is a flow of a method of installing a wedge member for repairing fatigue cracks in the sixth embodiment.
First, the second slope component 120 is mounted on the first slope component 110 (S61: mounting step).
After the mounting step S61, the positional relationship between the first slope component 110 and the second slope component 120 is adjusted (S62: position adjustment step). As a result, the second slope component 120 is relatively positioned with respect to the first slope component 110 when it is fitted into the stop hole 3. The relative position is adjusted so that the heights of the first slope component 110 and the second slope component 120 are slightly smaller than the diameter of the stop hole 3 so that the repair wedge member 100 passes through the stop hole 3 at the very limit. Is preferable. Further, it may be temporarily fixed with tape or the like so that the adjusted positional relationship does not shift.
After the position adjustment step S62, the first slope component 110 and the second slope component 120 are fitted into the stop hole 3 (S63: fitting step). In the fitting step S63, the depth of the first slope component 110 and the second slope component 120 to be inserted into the stop hole 3 and the angle with respect to the crack are adjusted.
After the fitting step S63, the U-shaped rod 191 is inserted between the stop hole 3 and the first slope component 110 and the second slope component 120, and the U-shaped bent portion is hooked on the back side of the second slope component 120. Then, both ends of the U-shaped rod 191 to which the male screw 190 is attached are pulled out from between the stop hole 3 and the first slope component 110 and the second slope component 120 to the front side of the base material plate 1 (S64: U-shaped). Stick mounting step).
After the U-shaped rod mounting step S64, both ends of the U-shaped rod 191 are passed through the through holes of the plate 192, respectively, the spring 194 and the flat washer 195 are fitted into the protruding tips, and then the nut 193 is fitted ( S65: Biasing load applying member mounting step). At this time, a flat washer 195 is arranged between the nut 193 and the spring 194. A flat washer 195 may be arranged between the plate 192 and the spring 194. At this time, the mounted state of the plate 192 is a state in which the rear surface is in contact with the front surface of the first slope component 110, and the end portion of the U-shaped rod 191 protruding from the through hole faces the front surface.
After the urging load applying member mounting step S65, the second slope component 120 is assigned to the first slope component 110 by applying a proximity load in the direction in which the first slope component 110 and the second slope component 120 are close to each other by the spring 194. The wedge load W is generated by raising it upward (S66: wedge load generation step). In the wedge load generation step S66, the nuts 193 are gradually tightened while paying attention so that the urging load (tightening force) of the two nuts 193 is substantially equal. As a result, elastic strain (compression strain) in the compression direction is generated in the spring 194, and a tightening force acts in a direction that narrows the relative distance between the first slope component 110 and the second slope component 120. Further, by holding the spring 194 in a compressed state, it is possible to constantly apply an urging load in the direction in which the first slope component 110 and the second slope component 120 are close to each other. When an excessive load in the direction in which the fatigue crack 2 opens is applied to the stop hole 3 and the stop hole 3 is greatly stretched in the load direction, an appropriate rust load W can be automatically applied.

14A and 14B are views showing a state in which the removal mechanism of the fatigue crack repairing wedge member according to the seventh embodiment is attached to the repairing wedge member, FIG. 14A is a front view, and FIG. 14B is a B. −B'Cross section. In order to make the structure easy to understand, in FIG. 14B, the slope part and the base material plate are shown in cross section, and the removal mechanism is a sketch. The same functional members as those in the above-described embodiment are designated by the same reference numerals, and the description thereof will be omitted.
In the present embodiment, the pulley 200, the tension wire 201, and the weight 202 are provided as the urging means for applying the urging load to the bolt 140. One end of the tension wire 201 is fixed to the pulley 200 fitted to the head of the bolt 140, and the weight 202 is hung from the other end of the tension wire 201. As a result, the tension T is generated in the tension wire 201 by utilizing the gravity Q, and the torque N1 in the tightening direction can always be applied to the bolt 140. Therefore, the bolt 140 is applied to the first slope component 110 and the second slope component 120. On the other hand, the separation load f can be constantly applied. Instead of the pulley 200, the tension wire 201, and the weight 202, the urging means may be a string-wound spring or the like.

15A and 15B are views showing a state in which the removal mechanism of the fatigue crack repairing wedge member according to the eighth embodiment is attached to the repairing wedge member, FIG. 15A is a front view, and FIG. 15B is B. −B'Cross section. In order to make the structure easy to understand, in FIG. 15B, the slope part and the base material plate are shown in cross section, and the removal mechanism is a sketch. The same functional members as those in the above-described embodiment are designated by the same reference numerals, and the description thereof will be omitted.
In the present embodiment, an urging spring 210 is provided as an urging means for applying an urging load to the bolt 140. The urging spring 210 is, for example, a coil spring, and has an outer diameter slightly smaller than the inner diameter of the female screw 130 of the bolt, which is sufficiently larger than the distance between the parallel portion 110A and the second slope component 120 when installed in the stop hole 3. It has a large natural length.
The urging spring 210 is inserted into the female screw 130 of the bolt so as to be sandwiched between the tip of the bolt 140 and the front side of the second slope component 120, and is held in a compressed state by turning the bolt 140 in the tightening direction. .. As a result, the separation load f can be constantly applied to the first slope component 110 and the second slope component 120.

Next, the first slope component 110 and the second slope component 120 in the fourth to sixth embodiments are mounted on the stop hole 3, and the second slope component 120 is placed on the first slope component 110 by the proximity load applying means. A method of removing the first slope component 110 and the second slope component 120 when it becomes necessary to remove the first slope component 110 and the second slope component 120 from the stop hole 3 after raising the wedge load W will be described.
FIG. 16 is a flow No. 4 of a method of removing a wedge member for repairing fatigue cracks.
First, the bolt 140 is screwed in until the tip of the bolt 140 fitted to the first slope component 110 comes into contact with the second slope component 120 to generate a separation load (S71: separation load application step). In the case of the repair wedge member 100 in the fifth embodiment, the initial tightening bolt 170 is removed or sufficiently loosened before the separation load applying step S71. Further, in the case of the repair wedge member 100 in the sixth embodiment, the U-shaped rod 191 and the like are removed before the separation load applying step S71.
After the separation load applying step S71, the bolt 140 is further screwed in and the movement of the second slope component 120 is observed (S72: movement observation step).
Next, it is determined whether or not the second slope component 120 moves reasonably when the bolt 140 is screwed in the motion observation step S72 (S73: motion determination step). The reason why the second slope component 120 moves reasonably is, for example, a case where there is no possibility that the hole end of the stop hole 3 will be scraped by the movement of the second slope component 120.
If it is determined in the movement determination step S73 that the second slope component 120 moves reasonably, the bolt 140 is turned until the wedge load W is released, and the entire repair wedge member 100 is removed from the stop hole 3. (S74: Wedge member removal step), the removal method flow No. 4 is completed.
In this way, when removing from the stop hole 3, a separation load (removal load) is applied by a bolt 140 (removal load applying means) to move the second slope component 120 away from the first slope component, thereby causing a wedge member for repair. The 100 can be safely and reliably removed.
On the other hand, if it is determined in the movement determination step S73 that the second slope component 120 does not move reasonably, it is determined whether or not a load that expands the stop hole 3 up and down can be artificially applied (S75: artificial). Target load judgment step).

If it is determined in the artificial load determination step S75 that a load that expands the stop hole 3 up and down can be artificially applied, such a load is applied (S76: load load step). After the load-load step S76, the process returns to the motion observation step S72 and the same step is repeated. In this way, when the second slope component 120 does not move even when the separation load is applied, a forced external load is applied to the structure so that the entire repair wedge member 100 can be removed from the stop hole 3. As a result, the repair wedge member 100 can be removed at an early stage. For example, when the structure is a machine tool such as a ship, an offshore structure, or a crane, the forced external load increases the load, and when the structure is a bridge or a road, a heavy vehicle is run or a heavy object is placed. It is possible by things such as.
On the other hand, if it is determined in the artificial load determination step S75 that a load that expands the stop hole 3 up and down cannot be artificially applied, the process proceeds to flow 5 of the removal method described later.

FIG. 17 is a flow No. 5 of a method of removing a wedge member for repairing fatigue cracks.
In this flow, the removal mechanism according to the seventh or eighth embodiment is used.
First, an urging means (pulley 200, tension wire 201 and weight 202, or urging spring 210) is attached to the bolt 140, and a separation load is constantly applied between the first slope component 110 and the second slope component 120. (S81: Separation load constant application step).
After the separation load constant application step S81, the repair wedge member 100 to which the urging means is attached is left in a state where an external force (tensile load) P during operation acts on the structure provided with the stop hole 3 ( S82: Leaving step). Then, it waits for a large tensile load P that expands the stop hole 3 up and down to act. If the repair wedge member 100 is left for a certain period of time with the urging means attached, a probabilistic external load acts on the structure and the base material plate 1 in which the stop hole 3 is opened. When a relatively excessive tensile load P acts, the wedge load W is released, and in the case of the seventh embodiment, the weight 202 is lowered and the pulley 200 is rotated, and the eighth embodiment is also performed. In this case, the extension of the urging spring 210 causes the second slope component 120 to slide down on the slope of the first slope component 110 due to the separation load, and the repair wedge member even after the excessive tensile load P is unloaded. The wedge load W acting between the 100 and the upper and lower ends of the stop hole 3 is released, and the repair wedge member 100 can be removed.
After a certain period of time has elapsed from the start of leaving in the leaving step S82, it is determined whether or not the second slope component 120 has operated (moved) (S83: second slope component operation determination step).
If it is determined in the second slope component operation determination step S83 that the second slope component 120 has been activated, the bolt 140 is turned until the wedge load W is released, and the entire repair wedge member 100 is stopped. It is removed from the hole 3 (S84: wedge member removal step), and the removal method flow No. 5 is completed. In the wedge member removing step S84 of the eighth embodiment, the bolt 140 and the urging spring 210 are first removed, and the wedge member for repairing fatigue cracks according to the fourth embodiment is sufficiently removed. The entire repair wedge member 100 can be more reliably removed from the stop hole 3 by screwing in and turning a bolt having a shaft portion longer than that of the bolt female screw 130.
On the other hand, if it is determined in the second slope component operation determination step S83 that the second slope component 120 has not been operated, the process returns to the neglected step S82 and the same step is repeated.

Table 2 below is a table summarizing the method of removing the repair wedge member 100.

In Table 2, the situation example 1 is a case where the first slope component 110 and the second slope component 120 are erroneously tightened even though the torque is relatively small, which is less than the target torque, when the first slope component 110 and the second slope component 120 are installed in the stop hole 3. .. In this case, the first slope component 110 and the second slope component 120 can be immediately removed by performing the removal using the bolt 140 based on the flow 4 of the removal method.
Further, in the situation example 2, the first slope component 110 and the second slope component 120 are tightened to the target torque and installed in the stop hole 3, and then the first slope component 110 and the second slope component 120 are removed due to a process change. Is. In this case, the wedge load W is larger than that of the situation example 1, but if the second slope part 120 can move reasonably by tightening the bolt 140 based on the removal method flow 4, the first slope part 110 and The second slope component 120 can be removed immediately. On the other hand, if the second slope part 120 does not move reasonably, the removal work is started by performing the removal using the removal mechanism according to the seventh or eighth embodiment based on the removal method flow No. 5. After a certain period of time has passed, the first slope component 110 and the second slope component 120 can be removed.
Further, in the situation example 3, in the situation example 3, the elastic band 150 or the like hung around the first slope component 110 and the second slope component 120 serves as an automatic adjusting means, and the second slope component 120 approaches the first slope component 110 in a rising direction. When a load is continuously applied and an excessive load in the direction in which the fatigue crack 2 opens acts on the base material plate 1 after installation and the stop hole 3 is greatly stretched in the load direction, the repair wedge member 100 follows. This is a case where an appropriate wedge load W is automatically applied. In this case, the wedge load W is larger than that of the situation example 2, but the removal work is started by performing the removal using the removal mechanism according to the seventh or eighth embodiment based on the removal method flow No. 5. After a certain period of time has passed, the first slope component 110 and the second slope component 120 can be removed.

In the above embodiment, it has been described that the removal method flow 4 is shifted to the removal method flow 5, but the present invention is not limited to this, and the removal method flow 5 can be performed independently.

Further, in the above embodiment, the repair wedge member 100 applied to the stop hole 3 provided at the tip of the fatigue crack 2 and the removal mechanism thereof have been described, but the repair wedge member 100 and the removal mechanism thereof are described. Similarly, a wedge hole which is a drill hole provided on a crack path other than the base portion and the tip portion of the fatigue crack 2 can be used in the same manner. In addition, the stop hole 3 and the wedge hole can be installed side by side and used for both.

Further, the removal mechanism of the repair wedge member 100 needs to reduce the wedge load W after the first slope component 110 and the second slope component 120 are mounted on the stop hole 3 or the wedge hole to generate the wedge load W. Can also be used as a means for keeping the second slope component 120 away from the rear surface of the parallel portion 110A of the first slope component 110 when the above occurs.

Further, in a state where the repair wedge member 100 is mounted on the stop hole 3 or the wedge hole, the bolt 140 is turned at the time of inspection and lightly brought into contact with the second slope component 120 to bring the parallel portion of the first slope component 110 into parallel portion. The distance between the 110A and the second slope component 120 can be measured, and the amount of deformation of the stop hole 3 or the wedge hole at that time can be estimated.

Table 3 below is a table summarizing the application of the mounting load applying means and the removing load applying means according to the inclination direction of the slope component.

In Table 3, the upper part shows that the height of the fitting portion 11B becomes smaller as the height of the fitting portion 11B approaches the parallel portion 11A, as shown in the slope parts (FIGS. 1, 3 and 4) in the first to third embodiments. This is a case where the contact surface between the first slope component 110 and the second slope component 120 is in an upwardly upward inclined direction in the right view, and the lower row shows the slope components according to the fourth to eighth embodiments (FIG. 8, FIG. As shown in 10, 12, 14, 15), the height of the fitting portion 110B increases as it approaches the parallel portion 110A, so that the contact surface between the first slope component 110 and the second slope component 120 is viewed from the right side. This is the case where the slope is downward to the right.

As shown in Table 3, the repair wedge member 10 in which the contact surface between the first slope component 11 and the second slope component 12 is inclined upward to the right in the right-side view has fatigue cracks in the base plate 1 after installation. The seventh implementation as an automatic adjustment means of the mounting load, which automatically applies an appropriate wedge load W following when the stop hole 3 is greatly stretched in the load direction due to an excessive load in the opening direction of 2. A pulley 200 having a tension wire 201 and a weight 202 in the embodiment, or a string-wound spring or the like is fitted or fixed to the head of the bolt 14, or an elastic body such as the urging spring 210 in the eighth embodiment is bolted. It can be inserted between the tip of the 14 and the front side of the second slope component 12 to constantly apply the separation load by the bolt 14.
Further, as an urging means for applying an urging load when the second slope component 12 does not move even if a proximity load as a removal load is applied to the repair wedge member 10, the urging means in the above-described embodiment. In addition to 30, the elastic band 150 in the fourth or fifth embodiment is mounted around the first slope component 11 and the second slope component 12, or the tension wire 201 and the tension wire 201 and the same as in the seventh embodiment described above. A pulley 200 having a weight 202, a string-wound spring, or the like can be fitted or fixed to the head of the removal bolt 21 and a torque on the side of constantly tightening can be applied to constantly apply a proximity load.
On the other hand, in addition to the proximity load applying means in the above-described embodiment, the repair wedge member 100 whose contact surface between the first slope component 110 and the second slope component 120 is in an inclined direction downward to the right in the right view is second. The proximity load applying means (U-shaped rod 25, nut 27) in the embodiment can be applied.

The present invention is used for preventing recurrence of cracks from stop holes and wedge holes and suppressing the progress of recurrence cracks in various structures such as ships, marine structures, bridges, roads, vehicles, aircraft, and transportation / machine tools. It can be used to attach and remove repair wedge members.

1 Base plate (structure)
2 Fatigue crack 3 Stop hole 10, 100 Repair wedge member 11, 110 First slope part 12, 120 Second slope part 13, 130 Bolt female screw 14, 140 Bolt 21 Removal bolt (locking means)
22,160 Long hole 23 Detachment bolt Female screw 24, 190 Male screw 25, 191 U-shaped rod 26, 192 Plate 27, 193 Nut 30 Biasing means (coil spring)
150 Elastic band 170 Initial tightening bolt 180 Initial tightening bolt Female screw 194 Spring S1, S41, S51, S61 Mounting step S2 Locking step S3, S44, S54, S63 Fitting step S6, S45, S56, S66 Wedge load generation step S7 Handling of removal bolt Judgment step S12 Bolt relaxation step S15 Proximity load application step S17, S25, S36, S74, S84 Wedge member removal step S32 Biasing means mounting step S42, S52 Elastic band mounting step S43, S53, S62 Step S71 Separation load application step S72 Motion observation step S73 Motion determination step S75 Artificial load determination step S81 Separation load constant application step S82 Leaving step S83 Second slope component operation determination step P External force (external load, tensile load)
T tension W wedge load

Claims (21)

On the first slope component and the first slope component having a slope for suppressing the stress fluctuation width of the structure by fitting into a stop hole and / or a wedge hole provided for a fatigue crack generated in the structure. A wedge member for repair provided with a second slope component having a slope on which the second slope component slides, and a mounting load applying means for applying a load in a direction in which the second slope component slides on the first slope component. It is a removal mechanism used for removal,
When the second slope component is provided with a removal load applying means for applying a load in a direction in which the second slope component slides down on the first slope component, and the repair wedge member is removed from the stop hole and / or the wedge hole, A mechanism for removing a wedge member for repairing a fatigue crack, which comprises applying a removal load by the removal load applying means. As the mounting load applying means, a bolt that applies a separation load in a direction that separates the second slope component that fits into the bolt female screw formed on the first slope component, and as the removal load applying means, the first The proximity load applying means for applying a proximity load in a direction in which the slope component and the second slope component are close to each other is provided, and when the repair wedge member is removed from the stop hole and / or the wedge hole, the proximity load applying means is provided. The mechanism for removing a wedge member for repairing a fatigue crack according to claim 1, wherein the proximity load is applied by the method. As the proximity load applying means, a removal bolt that also serves as a locking means for locking the first slope component and the second slope component and the removal bolt opened in the first slope component can freely penetrate. The mechanism for removing a wedge member for repairing a fatigue crack according to claim 2, further comprising a slotted hole to be formed and a female screw for removing bolts formed on the second slope component to which the removing bolts are fitted. .. As the proximity load applying means, a U-shaped rod having a male screw at an end and mounted around the second slope component and the U-shaped rod that abuts on the first slope component to sandwich the second slope component. The mechanism for removing a wedge member for repairing a fatigue crack according to claim 2, further comprising a plate having a through hole through which the rod penetrates and a nut fitted to the male screw of the U-shaped rod. As the mounting load applying means, a proximity load applying means for applying a proximity load in a direction in which the first slope component and the second slope component are close to each other, and as the removal load applying means, the first slope component is formed. Bolt A bolt that applies a separation load in the direction in which the second slope component fitted to the female screw is separated is provided, and when the repair wedge member is removed from the stop hole and / or the wedge hole, the separation is performed by the bolt. The mechanism for removing a wedge member for repairing a fatigue crack according to claim 1, wherein a load is applied. The wedge member for repairing fatigue cracks according to claim 5, further comprising an elastic band mounted around the first slope component and the second slope component to generate tension as the proximity load applying means. Removal mechanism. As the proximity load applying means, an elastic band mounted around the first slope component and the second slope component to generate tension, an initial tightening bolt penetrating a long hole formed in the first slope component, and the like. The mechanism for removing a wedge member for repairing a fatigue crack according to claim 5, further comprising an initial tightening bolt female screw to which the initial tightening bolt formed on the second slope component is fitted. As the proximity load applying means, a U-shaped rod having a male screw at an end and mounted around the second slope component and the U-shaped rod that abuts on the first slope component to sandwich the second slope component. 5. The fifth aspect of the invention is characterized in that a plate having a through hole through which the rod penetrates, a nut fitted to the male screw of the U-shaped rod, and a spring mounted between the plate and the nut are provided. A mechanism for removing the described wedge member for repairing fatigue cracks. The method for mounting the repair wedge member using the mechanism for removing the fatigue crack repair wedge member according to claim 3.
A mounting step for mounting the second slope component on the first slope component, and
A person who passes the removal bolt through the slotted hole of the first slope part and turns the tip into the female screw of the removal bolt of the second slope part to lock the first slope part and the second slope part. Stop step and
A fitting step of fitting the locked first slope component and the second slope component into the stop hole and / or the wedge hole.
Repair of fatigue cracks, which comprises a wedge load generation step in which the bolt is turned to apply the separation load and the second slope component is raised onto the first slope component to generate a wedge load. How to attach the wedge member. After the wedge load generation step, it is determined whether or not the removal bolt is to be continuously used as the locking means, and if not used, the removal bolt is once removed. The method for mounting a wedge member for repairing a fatigue crack according to claim 9. The method for mounting the repair wedge member using the mechanism for removing the fatigue crack repair wedge member according to claim 6.
A mounting step for mounting the second slope component on the first slope component, and
An elastic band mounting step in which the elastic band is hung around the first slope component and the second slope component, and
A position adjusting step for adjusting the positional relationship between the first slope component and the second slope component by operating the bolt in the screwing direction, and
A fitting step of fitting the first slope component and the second slope component around which the elastic band is hung into the stop hole and / or the wedge hole.
Fatigue characterized by comprising a wedge load generating step of generating a wedge load by operating the bolt in a loosening direction and causing the second slope component to rise onto the first slope component by the tension of the elastic band. How to attach a wedge member for repairing cracks. A method for removing the repair wedge member by using the mechanism for removing the fatigue crack repair wedge member according to any one of claims 2 to 4.
A bolt loosening step for loosening the bolt that applies the separation load to the second slope component, and
The proximity load applying step of operating the proximity load applying means to apply the proximity load, and
Removal of a fatigue crack repair wedge member comprising the wedge member removing step of further operating the proximity load applying means to remove the entire repair wedge member from the stop hole and / or the wedge hole. Method. 3. The third aspect of the present invention is that in the proximity load applying step, the removal bolt is screwed into the female screw of the removal bolt to apply the proximity load in a direction in which the first slope component and the second slope component are close to each other. The method for removing a wedge member for repairing a fatigue crack according to claim 12, which is cited. The wedge for repairing fatigue cracks according to claim 13, wherein when the removal bolt is once removed, the removal bolt is fitted to the female screw of the removal bolt before the proximity load applying step. How to remove the parts. In the proximity load applying step, the U-shaped rod is inserted between the stop hole and / or the wedge hole and the first slope component and the second slope component, hooked on the back side of the second slope component, and the plate is hooked. Is attached to the first slope component so that the end thereof faces the front surface from the through hole, the nut is fitted into the male screw at the end and screwed, and the first is screwed through the plate. The method for removing a wedge member for repairing a fatigue crack according to claim 12, wherein the proximity load is applied in a direction in which the slope component and the second slope component are close to each other. In the proximity load applying step, when the second slope component does not move even if the proximity load is applied, the urging means mounting step for mounting the urging means for applying the urging load to the proximity load applying means is performed. Further prepare
By constantly applying the urging load in the direction in which the first slope component and the second slope component are close to each other by the urging means, the repair wedge is subjected to a probabilistic external load acting on the structure. The method for removing a wedge member for repairing a fatigue crack according to any one of claims 12 to 15, wherein the entire member can be removed from the stop hole and / or the wedge hole. The method for removing a wedge member for repairing a fatigue crack according to claim 16, wherein a coil spring or a leaf spring is used as the urging means. In the proximity load applying step, when the second slope component does not move even if the proximity load is applied, a forced external load is applied to the structure, and the entire repair wedge member is subjected to the stop hole. The method for removing a wedge member for repairing a fatigue crack according to any one of claims 12 to 15, wherein the wedge hole can be removed from the wedge hole. A method for removing the repair wedge member by using the mechanism for removing the fatigue crack repair wedge member according to any one of claims 5 to 8.
A separation load applying step of screwing the bolt until the tip of the bolt fitted to the first slope component abuts on the second slope component to generate a separation load.
A motion observation step of further screwing the bolt to observe the motion of the second slope component,
A movement judgment step to judge whether the second slope part moves reasonably, and
When it moves reasonably, it is characterized by having a wedge member removing step for removing the entire repair wedge member from the stop hole and / or the wedge hole by operating the bolt until the wedge load is released. How to remove the wedge member for repairing fatigue cracks. If it is determined that the movement does not move reasonably as a result of the determination of the movement determination step, an artificial load determination step of determining whether or not a load for expanding the stop hole and / or the wedge hole up and down can be artificially applied is performed. The fatigue according to claim 19, further comprising, when it is possible to artificially load, the load to be spread up and down is artificially applied, and the motion observation step and the motion determination step are repeated. How to remove the wedge member for repairing cracks. As a judgment in the artificial load determination step, when it is impossible to artificially load the bolt, an urging means is attached to the bolt to constantly apply a separation load between the first slope component and the second slope component. The step of constantly applying the separation load, the step of leaving the structure provided with the stop hole and / or the wedge hole in a state where an external force during operation is applied, and the second step after a certain period of time after the leaving. A second slope component operation determination step for determining the operation of the slope component is further provided, and when it is determined that the operation of the second slope component has been performed, the wedge member removal step is executed to perform the operation of the second slope component. The method for removing a wedge member for repairing a fatigue crack according to claim 20, wherein when it is determined that the operation has not been performed, the leaving step and the second slope component operation determination step are repeated.

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