KR102652288B1 - Crack width measuring instrument for safety diagnosis of structure - Google Patents

Abstract

The present invention is a main body case formed in a rod shape of a size that can be carried by an operator, with a measuring hole formed at the bottom, and a guide hole formed vertically on the side; a measuring pin that is slidably installed inside the main body case so as to protrude through the measuring hole and is formed on an inclined surface at the bottom; a lever inserted into the guide hole and integrally connected to the measuring pin so as to slide along the side of the main body case; an indicator needle protruding from the lever and slidably in close contact with a side of the main case; and a scale provided on the main body case to face the display needle, wherein the inclined surface is shaped like an awl so that the diameter of the measuring pin increases at a constant rate in proportion to the length of the measuring pin protruding from the main case. It is characterized by being formed.

Description

{Crack width measuring instrument for safety diagnosis of structure}

The present invention relates to a crack width measuring device for structural safety diagnosis. More specifically, a measuring pin having an inclined surface whose width increases so as to measure the width of a crack created in a structure is installed to be able to emerge from the main case, The operation of inserting a measuring pin into a crack converts the protruding distance of the measuring pin into a width and displays it, allowing the operator to easily check the width of the crack. Before measuring, the wind emitted from the main case can be applied to the crack or its surroundings. This relates to a crack width measuring device for structural safety diagnosis that can remove remaining foreign substances and measure the exact width.

In general, cracks in structures such as bridges, tunnels, and buildings are caused by various reasons, such as drying shrinkage of the structure, excessive stress, or material problems.

Cracks that occur in structures are difficult to detect early because the width of the cracks is so small, and the speed of crack progression is generally very slow, so it is easy for constructors or users to inadvertently overlook them, judging that they do not have a significant impact on the safety of the structure. There is a side.

However, since any crack may cause structural defects in the structure and ultimately lead to the collapse of the structure, cracks occurring in the structure are one of the very important factors in diagnosing the safety of the structure.

A measuring instrument for measuring such cracks is also one of the very important devices for diagnosing the stability of a structure.

As described above, conventional technology for measuring cracks occurring in structures uses equipment such as crack strain gauges, digital crack measuring devices, and crackers.

However, conventional measuring devices not only have difficulty measuring fine cracks, but also require a separate magnifying glass to check fine cracks in addition to the crack measuring device, which causes inconvenient work.

In order to solve the above problems, a crack width measuring device for concrete structures has been developed, and the crack width measuring device according to the prior art has a hollow housing with the upper and lower parts open, and is installed horizontally movable inside the lower part of the housing to enable structural movement. It includes a crack measuring unit equipped with a measuring device marked with scales of various thicknesses spaced apart from each other to measure the width of a crack occurring in the crack, and a magnifying glass installed on the upper part of the housing, and the crack measuring unit is provided inside the housing. , a moving block coupled to the measuring element, a moving screw that penetrates the side wall of the housing and is placed inside the housing, is coupled to the moving block and rotates to move the moving block in the horizontal direction, and is placed on the outside of the housing, but is moved. It includes a dial that is coupled to the screw and rotates the moving screw as it rotates, and a support member that is disposed to protrude from the lower inner wall of the housing toward the center and supports the lower surfaces of both ends of the measuring device.

The background technology of the present invention is disclosed in Republic of Korea Patent Publication No. 10-2328035 (announced on November 17, 2021, title of the invention: Crack width measuring device for safety inspection and diagnosis of concrete structures).

In the crack width measuring device according to the prior art, the crack width is measured by reading the scale by the operator visually checking the measuring instrument placed opposite the crack. Therefore, when foreign substances accumulate around the crack, it is difficult for the operator to read the scale accurately, and the curve is curved. In the case of cracks formed in a shape, there is a problem in that it is difficult to measure the width of the crack by finding the location where the crack is widest.

Therefore, there is a need to improve this.

In the present invention, a measuring pin having an inclined surface whose width increases so as to measure the width of a crack created in a structure is installed to be able to protrude from the main case, and the distance at which the measuring pin protrudes by the operation of inserting the measuring pin into the crack It is converted into a width and displayed, so the operator can easily check the width of the crack. Before measuring, the wind discharged from the main case can remove any remaining foreign matter on or around the crack, allowing accurate width measurement. The purpose is to provide a crack width measuring device for structural safety diagnosis.

The present invention is a main body case formed in a rod shape of a size that can be carried by an operator, with a measuring hole formed at the bottom, and a long guide hole formed on the side in the vertical direction; a measuring pin that is slidably installed inside the main body case so as to protrude through the measuring hole and is formed on an inclined surface at the bottom; a lever inserted into the guide hole and integrally connected to the measuring pin so as to slide along the side of the main body case; a display needle protruding from the lever and slidably in close contact with a side of the main body case; and a scale provided on the main body case to face the display needle, wherein the inclined surface is awl-shaped so that the diameter of the measuring pin increases at a constant rate in proportion to the length of the measuring pin protruding from the main case. It is characterized by being formed.

In addition, with respect to the length of the inclined surface of the present invention of 200 mm, the diameter of the inclined surface is formed such that the diameter of the inclined surface is increased by 0.1 mm at a position 2 mm upward from the bottom of the inclined surface.

In addition, the present invention further includes a blowing fan for removing cracks or dirt remaining around the cracks by pumping air toward the measurement hole.

In addition, the present invention further comprises a power transmission unit that converts the linear motion of the measuring pin into rotational motion of the blowing fan and transmits it.

In addition, the main body case of the present invention includes a receiving portion in which the measuring pin is slidably stored; An operating unit partitioned by the storage unit and the guide panel and housing the power transmission unit; and a blowing part that extends from the operating part and in which the blowing fan is rotatably housed.

The crack width measuring device for structural safety diagnosis according to the present invention is installed so that a measuring pin can protrude from the bottom of the main case, and an awl-shaped inclined surface is formed at the end of the measuring pin, and the slope of the inclined surface is proportional to the length at which the measuring pin protrudes. Since it is formed to be wide, the end of the measuring pin is inserted into the crack, and the entrance of the crack is in close contact with the inclined surface, so that the measuring pin no longer protrudes from the main case, and is connected to the measuring pin as a whole, and opposes the indicator needle that moves. There is an advantage of being able to accurately measure crack width by reading the scale.

In addition, the crack width measuring device for structural safety diagnosis according to the present invention has a locking protrusion formed on the inner end of the measuring pin, and an elastic member is interposed between the locking protruding portion and the measuring hole of the main body case, so that the measuring pin can be inserted into the main case. Elastic force is provided in the direction to keep the measuring pin inserted into the main case, and a lever is installed that protrudes from the measuring pin to the side of the main case and slides along the outer wall of the main case, so that the measuring pin can be moved by the operator pulling the lever. There is an advantage that the width of the crack can be easily measured by protruding to the outside of the main case.

In addition, the crack width measuring device for structural safety diagnosis according to the present invention is equipped with a blowing fan that sprays air at a pressure higher than the set value toward the measurement hole to remove foreign substances remaining in the crack or around the crack, so blowing air before proceeding with the crack width measurement operation. By driving a fan, cracks or foreign substances around the cracks can be removed, which has the advantage of allowing more effective and accurate measurement.

In addition, the crack width measuring device for structural safety diagnosis according to the present invention is equipped with a power transmission unit that converts the linear motion of the measuring pin into rotational movement and transmits it to the blower fan, so it can be used simply by protruding the measuring pin out of the main case without a separate driving part. Since it can provide power to a blowing fan, it has the advantage of reducing the cost of removing foreign substances from or around cracks.

Figure 1 is a perspective view showing a crack width measuring device for structural safety diagnosis according to an embodiment of the present invention.
Figure 2 is a cross-sectional view showing a crack width measuring device for structural safety diagnosis according to an embodiment of the present invention.
Figure 3 is an exploded perspective view showing the power transmission part of a crack width measuring device for structural safety diagnosis according to an embodiment of the present invention.
Figure 4 is a cross-sectional view showing a crack width measuring device for structural safety diagnosis according to another embodiment of the present invention.

Hereinafter, an embodiment of a crack width measuring device for structural safety diagnosis according to the present invention will be described with reference to the attached drawings.

In this process, the thickness of lines or sizes of components shown in the drawings may be exaggerated for clarity and convenience of explanation.

In addition, the terms described below are terms defined in consideration of functions in the present invention, and may vary depending on the intention or custom of the user or operator.

Therefore, definitions of these terms should be made based on the content throughout this specification.

Figure 1 is a perspective view showing a crack width measuring device for structural safety diagnosis according to an embodiment of the present invention, Figure 2 is a cross-sectional view showing a crack width measuring device for structural safety diagnosis according to an embodiment of the present invention, and Figure 3 is the present invention. This is an exploded perspective view showing the power transmission part of a crack width measuring device for structural safety diagnosis according to an embodiment of the invention.

Referring to Figures 1 to 3, the crack width measuring device for structural safety diagnosis according to an embodiment of the present invention is formed in a bar shape of a size that can be carried by an operator, and a measuring hole 15 is formed at the bottom, A main body case 10 with a guide hole 14 formed in a vertical direction on the side, slidably installed inside the main body case 10 so that it can protrude through the measurement hole 15, and an inclined surface 32 at the bottom. a measuring pin 30 formed in the main case 10, a lever 37 inserted into the guide hole 14 so as to be slidable along the side of the body case 10 and integrally connected to the measuring pin 30, and a lever 37 connected to the measuring pin 30. It includes a display needle 38 that protrudes and slides into close contact with the side of the main case 10, and a scale 13 provided on the main case 10 to face the display needle 38.

Therefore, when the operator places the lower end of the main case 10 facing the crack and then slides the lever 37 toward the crack, the measuring pin 30 protrudes through the measuring hole 15 and is inserted into the crack. At this time, The indicator needle 38, which slides along the side of the main case 10 along the lever 37, is placed opposite the scale 13, and the length inserted into the crack is converted to the width of the crack. It is displayed so that it can be recognized.

Through the above-mentioned operation, the operator places a measuring instrument equipped with a scale (13) in close contact with the crack and easily recognizes the width of the crack by reading only the scale (13) indicated by the indicator needle (38) without measuring the width of the crack with the naked eye. You can do it.

Here, the inclined surface 32 of the present embodiment is formed in an awl shape so that the length of the measuring pin 30 protruding from the main case 10 and the diameter of the measuring pin 30 are increased at a constant rate, so that the measuring pin ( The width of the crack can be accurately measured simply by inserting the inclined surface 32 of 30) into the crack.

With respect to the length of the inclined surface 32 of 200 mm, the diameter of the inclined surface 32 is formed such that the diameter at the position moved 2 mm upward from the bottom of the inclined surface 32 increases by 0.1 mm, and the scales 13 are spaced at 2 mm intervals in the vertical direction. One graduation (13) is engraved.

Therefore, if the scale 13 indicated by the guide when the inclined surface 32 is inserted into the crack and can no longer be inserted is 1 mm, the length of the inclined surface 32 inserted up to this point is 20 mm, and the part in contact with the crack is 20 mm. Since the diameter of the inclined surface 32 is 1 mm, the width of the concrete crack to be measured is 1 mm.

In addition, this embodiment includes a blowing fan 50 that removes cracks or dirt remaining around the cracks by pumping air toward the measuring hole 15, and a blowing fan 50 that causes the linear movement of the measuring pin 30. It further includes a power transmission unit 70 that converts and transmits rotational motion.

Therefore, before proceeding with the measurement work, if the operator moves the lever 37 toward the measurement hole 15 after placing the measurement hole 15 on the crack side, the straight line of the measurement pin 30 is formed by the operation of the power transmission unit 70. Since the movement is converted to the rotational movement of the blowing fan 50 and transmitted, external air is pressured toward the measurement hole 15, and foreign substances remaining in the crack or around the crack are removed to the outside of the crack.

As described above, when the measuring pin 30 is inserted into the crack after the foreign substances such as sand and dust remaining inside the crack or on the main surface of the crack are removed, the foreign substances remaining inside the crack or around the crack are removed between the inclined surface 32 and the crack. It is possible to prevent erroneous work that does not accurately measure the width of the crack.

The main body case 10 of this embodiment is divided by a storage portion 12 in which the measuring pin 30 is slidably stored, the storage portion 12 and a guide panel 86, and a power transmission unit 70. It includes an operating part 17 in which a blower fan 50 is rotatably accommodated, and a blowing part 19 extending from the operating part 17.

The receiving part 12 is formed in the shape of a long cylinder in the vertical direction, and a guide panel 86 is formed in the center to separate it from the operating part 17, and a hole is formed in the center of the guide panel 86 to form a measuring pin ( The upper part of 30) is slidably inserted, and a plurality of passage holes 18 through which air passes are formed around the hole portion.

In addition, a plurality of discharge holes 16 are formed around the measurement hole 15, so that air that cannot be discharged through the measurement hole 15 can be discharged toward the crack through the discharge hole 16, and the blower 19 ) A plurality of blowing hole portions 11 are also formed on the bottom surface so that the air pressure generated by the blowing fan 50 can be sprayed toward the crack through the blowing hole portion 11, the passage hole portion 18, and the discharge hole portion 16. do.

Here, the blowing part 19 is formed to have a larger diameter compared to the receiving part 12 and the operating part 17, and the blowing hole part 11 is formed to extend from the inside of the operating part 17 to the outside. Some of the air sprayed through (11) passes through the operating unit 17 and the storage unit 12 and is sprayed toward the crack, and the remainder of the air sprayed through the blowing hole unit 11 passes through the operating unit 17 and the storage unit 12. It moves along the outer wall of (12) and is sprayed toward the crack.

Therefore, it is possible to effectively remove foreign substances remaining inside and around the crack.

The measuring pin 30 of this embodiment is formed in the shape of a long cylinder in the vertical direction, has a 20 mm long inclined surface 32 at the bottom to form an awl shape, and has a wide diameter at the top to sit on the guide panel 86. A locking protrusion 34 is formed, and a through-hole portion 36 opposing the through-hole portion 18 is formed in the locking protrusion 34 so that the air supplied along the operating portion 17 and the receiving portion 12 passes through. It can be supplied through the hole portion 18 and the through-hole portion 36 to the measurement hole portion 15 and the discharge hole portion 16.

The power transmission unit 70 of this embodiment includes a transmission shaft 72 extending from the upper surface of the locking protrusion 34 and disposed on the operation portion 17, and a spiral formed in the shape of a screw thread on the peripheral surface of the transmission shaft 72. The protrusion 74 and the conversion pipe 76 are integrally connected to the rotation axis 52 of the blowing fan 50, and the transmission shaft 72 is slidably inserted, and a straight line is formed on the inner wall of the conversion pipe 76. It includes a straight groove portion 78 into which the spiral protrusion 74 is slidably inserted.

Therefore, when the measuring pin 30 protrudes out of the measuring hole 15, the transmission shaft 72 is discharged from the conversion pipe 76 and the spiral protrusion 74 descends. At this time, the measuring pin 30 is in the receiving part. (12) The rotational movement is restricted by the guide portion 84 provided on the inner wall, and since it is in a sliding state, the transmission shaft 72, which is formed integrally with the measuring pin 30, is also in a state in which the rotational movement is restricted, and the conversion pipe ( As it is discharged from 76, the spiral protrusion 74 presses the straight groove portion 78 in the side direction, causing the conversion pipe 76 to rotate.

Since the rotation shaft 52 of the blower fan 50 is integrally connected to the upper surface of the conversion pipe 76, the blower fan 50 rotates together with the conversion pipe 76, which is rotated while being pressed by the spiral protrusion 74. Air is sprayed around the crack or crack while pressurizing the air from the upper part of the rich 19 to the lower side.

An elastic member 39 is installed at the lower part of the measuring pin 30. The elastic member 39 is interposed between the guide panel 86 and the measuring hole part 15, so the measuring pin 30 is placed inside the receiving part 12. It provides elastic force to insert in the direction.

In addition, the guide part 84 of this embodiment is formed in the central part of the guide panel 86 and the guide panel 86 into which the measuring pin 30 is slidably inserted up and down inside the storage part 12. A pair of guide grooves 87 that protrude laterally from the hole, and a guide protrusion that protrudes laterally from the upper part of the measuring pin 30 passing through the hole and is slidably inserted into the guide groove 87. Includes (88).

Therefore, the upper part of the measuring pin 30, where the guide protrusion 88 is formed, slideably passes through the guide panel 86, and the guide protrusion 88 protruding laterally from the measuring pin 30 is formed in the guide groove portion ( Since it is inserted into 87), rotational movement is restricted and it is installed in the receiving part 12 in a state where linear movement is possible.

Therefore, when the operator holds the lever 37 and slides it downward or upward, the measuring pin 30 moves in a straight line to protrude or insert into the outside of the measuring hole 15. At this time, the measuring pin 30 is formed integrally with the measuring pin 30. The transmission shaft 72 moves in a straight line, and the spiral protrusion 74 provided on the transmission shaft 72 rotates the conversion pipe 76 and the blowing fan 50 while pressing the straight groove portion 78 in the side direction. While the air above the blower 19 is pressured downward, foreign substances remaining in the crack or around the crack can be removed toward the outside of the side crack.

In addition, since the mesh net 54 is installed on the upper surface of the blower 19, when the lever 37 is moved upward, the linear motion is transmitted to the blower fan 50 as a rotational motion, and the blower fan 50 rotates in the reverse direction. Since the removal of foreign substances can be carried out while pushing air toward the mesh net 54, the measuring instrument can be lifted upside down and the mesh net 54 placed toward the crack side, and then the blowing operation can be performed to remove foreign substances.

Figure 4 is a cross-sectional view showing a crack width measuring device for structural safety diagnosis according to another embodiment of the present invention.

Referring to FIG. 4, the crack width measuring device for structural safety diagnosis according to this embodiment further includes a discharge passage 80 that guides air from the blower 19 to the measurement hole 15 along the outer wall of the main body case 10. Including, the discharge passage 80 in this embodiment includes a plurality of supply pipes 82 extending downward along the main body case 10 from the blowing hole portion 11 formed on the bottom of the blowing portion 19. do.

Therefore, part of the air sprayed from the blower 19 is sprayed toward the measurement hole 15 along the main case 10, and the remaining air is sprayed toward the measurement hole 15 along the supply pipe 82.

As described above, air is sprayed along the two channels, making it possible to effectively remove foreign substances remaining inside and around the crack.

As a result, a measuring pin having an inclined surface whose width increases so as to measure the width of a crack created in the structure is installed to be able to protrude from the main case, and the distance at which the measuring pin protrudes is determined by the operation of inserting the measuring pin into the crack. It is converted into width and displayed, so workers can easily check the width of the crack. It is a structure that can measure the exact width by removing foreign substances remaining in or around the crack using wind discharged from the main case before measuring. It will be possible to provide a crack width measuring device for safety diagnosis.

The present invention has been described with reference to an embodiment shown in the drawings, but this is merely illustrative, and various modifications and other equivalent embodiments can be made by those skilled in the art. You will understand.

In addition, although the crack width measuring device for structural safety diagnosis has been described as an example, this is only an example, and the measuring device of the present invention can be used in products other than the crack width measuring device for structural safety diagnosis.

Therefore, the true technical protection scope of the present invention should be determined by the scope of the patent claims below.

10: main body case 11: blowing hole part
12: storage part 13: scale
14: Guide hole part 15: Measurement hole part
16: discharge hole part 17: operating part
18: Passing hole part 19: Blowing part
30: measuring pin 32: inclined plane
34: Locking jaw portion 36: Through hole portion
37: Lever 38: Indicator needle
39: elastic member 50: blowing fan
52: rotation axis 54: mesh net
70: Power transmission unit 72: Transmission shaft
74: Spiral protrusion 76: Conversion pipe
78: straight groove 80: discharge passage
82: supply pipe

Claims (5)

A main body case formed in a rod shape of a size that can be carried by an operator, with a measuring hole formed at the bottom, and a guide hole formed vertically on the side;
a measuring pin that is slidably installed inside the main body case so as to protrude through the measuring hole and is formed on an inclined surface at the bottom;
a lever inserted into the guide hole and integrally connected to the measuring pin so as to slide along the side of the main body case;
a display needle protruding from the lever and slidably in close contact with a side of the main body case;
a scale provided on the main body case to face the display needle;
A blowing fan that pumps air toward the measurement hole to remove cracks or dirt remaining around the cracks; and
It includes a power transmission unit that converts the linear motion of the measuring pin into rotational motion of the blowing fan and transmits it,
The power transmission unit 70 is,
a transmission shaft (72) extending from the upper surface of the locking protrusion (34) of the measuring pin and disposed on the operating portion (17) of the main body case;
a spiral protrusion (74) formed in a screw thread shape on the circumferential surface of the transmission shaft (72);
A conversion pipe 76 integrally connected to the rotation shaft 52 of the blowing fan 50 and into which the transmission shaft 72 is slidably inserted;
It is formed in a straight line on the inner wall of the conversion pipe 76 and includes a straight groove portion 78 into which the spiral protrusion 74 is slidably inserted,
Before proceeding with the measurement work, after placing the measuring hole 15 on the crack side, when the operator moves the lever 37 toward the measuring hole 15, the measuring pin ( Since the linear motion of 30) is converted into the rotational motion of the blowing fan 50 and transmitted, external air is pressured toward the measurement hole 15, and foreign substances remaining in the crack or around the crack can be removed to the outside of the crack. A crack width measuring device for structural safety diagnosis.
According to paragraph 1,
A crack width measuring device for structural safety diagnosis, characterized in that, with respect to the length of the inclined surface of 200 mm, the diameter of the inclined surface is increased by 0.1 mm at a position moved 2 mm upward from the bottom of the inclined surface.
delete delete The method of claim 1, wherein the main body case is:
a receiving portion in which the measuring pin is slidably stored;
An operating unit partitioned by the storage unit and the guide panel and housing the power transmission unit; and
A crack width measuring device for structural safety diagnosis, comprising a blowing part that extends from the operating part and in which the blowing fan is rotatably housed.

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