KR101907992B1 - Structure Diagnostic Rebound Hardness Safety Position Indicator - Google Patents

Abstract

The present invention relates to a rebound hardness position marking device for structural safety diagnosis, which is used for estimating strength of a concrete structure based on an average value obtained by measuring a surface rebound hardness of the structure at multiple points. The rebound hardness position marking device includes: a plurality of marking pens (30) provided on a lower outer surface thereof with a latching sill (31) to draw a horizontal marking line (L1) and a vertical marking line (L2) on a hardness measurement surface (20); a pen holder (40) in which through-holes (41) through which the marking pen (30) is inserted are formed in series at a predetermined interval in a longitudinal direction; a pair of roller support plates (50) installed parallel to each other at both ends of the pen holder (40); bearings (60) installed on the roller support plates (50), respectively; a pair of parallel rotation shafts (61) having both ends supported by an inner ring of the bearing (60); a plurality of rollers (62) installed at both ends of the rotation shaft (61) to roll on the hardness measurement surface (20); a barrel (70) inserted through an upper end of the through-hole (41) to receive the marking pen (30); a preload spring (71) installed inside the barrel (70) to press a pen point (32) of the marking pen (30) toward the hardness measurement surface (20); a cap (72) installed at an upper end of the barrel (70) to support an upper end of the preload spring (71); a pin hole (42) formed in the pen holder (40) in a horizontal direction while passing through the through-hole (41); a latching pin (43) inserted into the pin hole (42) and latched to the latching sill (31); a bracket (80) installed on the pen holder (40); and a handle 81 provided on the bracket (80).

Description

BACKGROUND OF THE INVENTION Field of the Invention [0001] The present invention relates to a rebound hardness position indicator

The present invention relates to a method of measuring the surface rebound hardness of a concrete structure and measuring the strength of a structure based on the average of the surface rebound hardness of the concrete structure. The present invention relates to a rebound hardness position display device for safety diagnosis of a structure.

In general, the rebound hardness test is a non-destructive method for estimating the compressive strength of concrete. When a hardened concrete surface is hit by a schmidt hammer, there is a specific correlation between the measured rebound hardness and the compressive strength of the concrete It is based on experimental data that there is a relationship.

The measurement principle of the rebound hardness measurement is such that the plunger 1 having a hemispherical tip at its tip end is impacted on the surface of the concrete 2 by the elastic force of the spring to measure the compressive strength of the concrete from the hardness of the measured concrete surface .

In this case, the rebound degree is proportional to the elastic modulus of concrete, and since the strength of concrete is related to the modulus of elasticity, the compressive strength can be estimated by using the relational hardness and compressive strength relationship.

That is, when the leading end of the test hammer, which is called the plunger 1, is hit toward the surface of the concrete 2 in FIGS. 1 (A) and 1 (B), the concrete 2 is impregnated 3). When the concrete surface is struck with a constant energy by the rebound hardness tester, the height (rebound height or rebound hardness) of the test hammer rises again, the hardness of the concrete (brinell hardness) and the strength of the concrete are related to each other .

According to this, the rebound height is lowered as the depth of the indentation (3), which is the depth of the concrete caused by the impact, increases, and the rebound height becomes lower and the hardness becomes smaller as the depth of the rebound increases. The rebound height becomes higher and the hardness becomes larger .

In the rebound hardness test using the Schmidt hammer, there is a variation in the measurement value depending on the presence of the projected aggregate, the distance from the rebar and the roughness of the impact surface. To reduce the error of the measurement, about 20 impact points Is measured in the form of a lattice, and the average of the remaining values is obtained by excluding the data with a large error, and the rebound of the concrete is calculated.

In this case, in order to display the measurement point on the measuring surface of the concrete in a lattice shape, a pattern paper such as a template is adhered to the concrete surface and then displayed with a pen. However, since a large number of circles must be displayed manually, the operation speed is slow and inconvenient .

In order to improve such inconvenience, in Korean Patent Registration No. 10-1229305 (hereinafter referred to as " Prior Art 1 "), a plurality of points on a plane are shot at a time using a plurality of stamp pens arranged in a lattice form It has been proposed to display it. However, in the prior art 1 as described above, there is a problem in that when the hardness measurement surface is bent, a stamp pen is formed which can not contact the surface, and the display point is missed because the shock pens are not individually provided in each stamp pen.

Japanese Patent Application No. 10-1410338 (hereinafter referred to as " Prior Art 2 ") proposes to display a measurement point by rolling a stamp roller supplied with ink from an ink container built in a handle to a curved surface or a plane measurement surface.

However, in the related arts 1 and 2, since the stamp pen and the stamp roller are left exposed to the air when not in use, the ink is easily dried and the life is shortened.

Korean Patent Registration No. 10-1229305 Korean Patent Registration No. 10-1410338

SUMMARY OF THE INVENTION The present invention has been made in order to solve the problems as described above, and its object is to provide a liquid crystal display device capable of displaying clear lines on a curved surface, preventing ink from drying, The present invention provides a rebound hardness position display device for safety diagnosis of a structure, which can adjust the inclination of a line, measure the length of a line drawn on a hardness measuring surface in real time, and can easily grasp an end point of a line.

In order to accomplish the object of the present invention, there is provided a rebound hardness position display device for safety diagnosis of structures, comprising: a plurality of marking pens having horizontal marking lines and vertical marking lines drawn on a hardness measurement surface, A penholder in which through holes through which the marking pen is inserted are formed in series with a predetermined interval being formed along the longitudinal direction; A pair of roller supporting plates installed parallel to each other at both ends of the pen holder; A bearing mounted on the roller support plate, respectively; A pair of parallel shafts supporting both ends of the inner ring of the bearing; A plurality of rollers provided at both ends of the rotating shaft for rolling the hardness measuring surface; A barrel inserted into the top of the through hole to receive the marking pen; A preload spring installed inside the barrel and pressing the pen tip of the marking pen toward the hardness measuring surface; A cap provided at an upper end of the barrel to support an upper end of the preload spring; A pin hole formed in the penholder in a horizontal direction and passing through the through hole; An engaging pin inserted into the pin hole and engaged with the engaging jaw; A bracket attached to the pen holder; And a handle mounted on the bracket.

The present invention relates to a tap hole formed at both ends of a pen holder, A vertical slot formed in the roller support plate so as to be aligned with the center of the tap hole; And a hinge bolt coupled to the tapped hole through the vertical slot to secure the roller support plate to the penholder.

The present invention relates to an upper bending plate formed horizontally at an upper end of a roller supporting plate; A lower bending plate horizontally formed at a lower end of the roller supporting plate; A pair of tilting bolts installed at a distance from each other in the upper bending plate and pressing the upper surface of the pen holder; And a lifting bolt installed in a direction opposite to the tilting bolt at the center of the lower bending plate and pressing the bottom surface of the pen holder.

The present invention relates to an adjustment plate installed on a penholder; A transparent plate which is horizontally formed on the lower end of the adjustment plate and is in close contact with the hardness measurement surface at a constant interval so as to be viewed through the horizontal marking line and the vertical marking line; And a reference line formed on the transmission plate so as to be perpendicular to the traveling direction of the roller.

The present invention relates to a spacer comprising: a spacer interposed between a regulating plate and a penholder; A slot formed in the adjustment plate to avoid interference of the engagement pin; And a semicircular groove formed at the lower end of the bracket and the spacer, respectively, in order to avoid interference of the latching pin.

The present invention relates to an iron plate having a rectangular tab shape and having a predetermined thickness, provided on a bottom surface of a pen holder; A pen lid covering the bottom of the marking pen and pen tip exposed on the underside of the penholder; A flange formed at the top of the pen lid; And a rectangular magnet rubber packing having a constant thickness and being adhered to the flange and adsorbed to the steel plate.

The present invention relates to a rotating slit provided on a rotating shaft. A photo interrupter for outputting a pulse signal while repeating light shielding and transmission by a rotating slit; A display unit for displaying a travel distance of the roller; A reset switch for initializing a travel distance output to the display unit; A setting switch for storing the driving distance outputted to the display unit as a target distance; A down switch for initially outputting a target distance to the display unit and switching to a countdown mode; A piezoelectric buzzer for outputting an end tone; And counts the pulse signal input from the photointerruption to calculate the travel distance of the roller. When a signal is input from the reset switch, the screen of the display unit is cleared and the travel distance according to the pulse signal is output. When a signal from the down switch is inputted, the target distance is subtracted from the target distance and outputted to the display unit. When the travel distance displayed on the display unit reaches the zero state, And a control unit for outputting the end tone through the buzzer.

As described above, according to the present invention, when the engaging pin 43 is separated from the pin hole 42, the marking pen 30 protrudes outward due to the repulsive force of the preload spring 71, And the barrel 70 can be easily separated from each other.

Since the marking pen 30 is individually moved by the preload spring 71 provided on each marking pen 30, even when the hardness measuring surface 20 is curved, the clear marking lines L1 and There is an effect that the vertical marking line L2 can be displayed without breaking.

It is possible to arbitrarily adjust the height of the pen holder 40 and the marking pen 30 by raising or lowering the tilting bolts 55 and 56 and the lifting bolts 57. [

It is possible to prevent the pen holder 40 from being displaced from the center by the vertical slot 51 and the hinge bolt 52 formed on the roller supporting plate 50. [

The inclination of the pen holder 40 and the marking pen 30 can be arbitrarily adjusted by rotating the pair of tilting bolts 55 and 56 in directions opposite to each other.

It is possible to prevent the insert bolt 86 provided on the handle 81 from interfering with the barrel 70 by the spacer 100 positioned between the pen holder 40 and the adjustment plate 90. [

The bracket 80 and the semicircular grooves 88 and 102 formed in the spacer 100 and the elongated hole 93 formed in the adjustment plate 90 secure the engaging pin 43 protruding to the rear surface of the pen holder 40 from the bracket 80 And the spacer 100 and the adjustment plate 90. In addition,

There is an effect that the perpendicular angle between the horizontal marking line L1 and the vertical marking line L2 can be conveniently adjusted by the reference line 92 formed on the transparent plate 91. [

The height of the transmission plate 91 can be freely adjusted by the adjustment plate 90 formed on the transmission plate 91.

The rollers 62 on both the left and right sides are simultaneously rotated by the rotating shaft 61 supported by the bearing 60 so that the straight running of the roller 62 can be maintained.

Since the pen lid 300 covering the pen tip 32 of the marking pen 30 is provided, it is possible to prevent the pen tip 32 from being exposed to the air to dry during storage.

Since the pen lid 300 is easily attached to or separated from the bottom surface of the pen holder 40 by the rubber magnet packing 304 adsorbed to the iron plate 302, the use is facilitated.

Since the travel distance of the roller 62 is displayed in real time via the display unit 208 by the photointerrupt 204 and the control unit 200, the line marking line L1 and the vertical marking line L2 are drawn There is an effect that can be done more accurately.

And the target distance is stored in the display unit 208 by the setting switch SW2 so that the target distance is displayed on the display unit 208 by the countdown in accordance with the travel distance. It is possible to conveniently check the end point of the terminal.

Since the control unit 200 outputs the end tone through the piezoelectric buzzer 202 when the travel distance of the roller 62 and the stored target distance coincide with each other, the end point of the line drawing can be more conveniently confirmed have.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a view for schematically explaining a general rebound hardness measurement method; FIG.
Fig. 2 is an exploded perspective view
Fig. 3 is an exploded perspective view of Fig. 2,
4 is a front perspective view
5 is a bottom perspective view
6 is a rear perspective view
7 is a rear view
Figure 8 is a side view
9 is a view showing marking of a vertical line on a concrete wall surface by the rebound hardness position display device according to the present invention
10 is a view showing the marking of the horizontal line on the hardness measurement surface by the rebound hardness position display device according to the present invention
11 is a sectional view taken along the line A-A 'in Fig. 9
12 is a sectional view taken along the line B-B 'in Fig. 10
13 is a cross-sectional view taken along line C-C '
Fig. 14 is a sectional view showing adjustment of the height of the marking pen from the state of Fig. 13
Fig. 15 is a sectional view showing adjustment of the inclination of the marking pen from the state of Fig. 13
16 is a front view showing that a measurement line is marked on the hardness measurement surface by the rebound hardness position display device according to the present invention
17 is a side sectional view showing the pen lid according to the present invention
18 is an exploded perspective view showing a pen lid according to the present invention.
19 is a circuit configuration diagram according to the present invention

Hereinafter, embodiments according to the present invention will be described in detail with reference to the accompanying drawings.

As shown in FIGS. 2 to 19, the present invention is characterized in that a horizontal marking line L1 and a vertical marking line L2 are drawn on a hardness measuring surface 20, and a plurality of Marking pen 30; And a penholder 40 in which through holes 41 through which the marking pen 30 is inserted are formed in series at regular intervals along the longitudinal direction.

The hardness measuring surface 20 is a concrete surface and the horizontal marking line L1 and the vertical marking line L2 are displayed so as to cross each other in a lattice as shown in FIG. The hardness can be measured with the intersection of the points L2 and L2 as the rupture points.

Since the marking pen 30 is made of concrete for drawing a line on a rough surface such as a concrete surface, the pen tip 32 can be made porous, and five marking pens 30 can be used, Are arranged in a line at regular intervals and provided on the pen holder 40, five straight lines can be displayed on the hardness measurement surface 20 at a time.

The penholder 40 may be formed in the form of a square bar, for example, and may be formed of an aluminum alloy or a titanium alloy for weight reduction.

The through hole 41 is formed with a jaw (not shown) on the inner peripheral surface of the through hole 41 so that the barrel 70 can be inserted into the through hole 41 at a predetermined depth as shown in FIGS. 11 and 12 And the through hole 41 is formed in the pen holder 40 so that the marking pen 30 is positioned vertically.

The present invention comprises a pair of roller supporting plates (50) installed parallel to each other at both ends of a penholder (40); A bearing 60 installed on the roller support plate 50, respectively; A pair of parallel shafts 61, both ends of which are supported by the inner ring of the bearing 60; And a plurality of rollers 62 installed at both ends of the rotating shaft 61 to roll the hardness measuring surface 20.

The roller support plate 50 can be formed by using a metal plate having a predetermined thickness. The roller support plate 50 is formed so as to be symmetrical in the front-rear direction and the left-right direction, and can be used for the left side and the right side.

The roller support plate 50 is formed with circular holes 50a and 50b for inserting the outer ring of the bearing 60 and has a circular hole 50a and 50b which are formed on the close contact surface when inserting the outer ring of the bearing 60 into the circular holes 50a and 50b. Thereby preventing the bearing 60 from being detached from the roller supporting plate 50 by injecting an adhesive or by press-fitting.

For example, the rotary shaft 61 may be formed as a hollow shaft to reduce weight, and it is possible to prevent the inner ring of the bearing 60 from moving in the axial direction by heat shrinking, press fitting, adhesion, or the like.

It is possible to apply the anaerobic adhesive agent to the hole formed at the center of the roller 62 and insert the rotary shaft 61 into the hole formed at the center of the roller 62 to prevent the roller 62 from being detached from the rotary shaft 61 have.

A hard rubber layer may be formed on the outer circumferential surface of the roller 62 to prevent the roller 62 from slipping when the hardness measuring surface 20 is squeezed.

A barrel (70) inserted into an upper end of a through hole (41) to receive a marking pen (30); A preload spring 71 installed inside the barrel 70 and pressing the pen tip 32 of the marking pen 30 toward the hardness measurement surface 20; A cap 72 installed at the upper end of the barrel 70 to support the upper end of the preload spring 71; A pin hole 42 formed in the pen holder 40 in the horizontal direction and passing through the through hole 41; And a retaining pin 43 which is inserted into the pin hole 42 and caught in the retaining jaw 31.

For example, the barrel 70 may be formed of a transparent material so that the barrel 70 can be seen through the inside of the barrel 70. The lower end of the barrel 70 may be press-fitted into the through hole 41 or fixed thereto by adhesion.

The preload spring 71 may be composed of, for example, a compression coil spring formed by spirally winding a spring steel wire, and is positioned between the upper end of the marking pen 30 and the lower end of the stopper 72 in a compressed state.

The stopper 72 can be inserted into the hole at the upper end of the barrel 70 and joined or fixed by screwing.

The pin holes 42 may be formed parallel to each other, for example, per one of the through holes 41. The pin holes 42 are formed from the front surface to the rear surface of the pen holder 40, and the engaging pins 43 have a U- It is bent and bent downward at the center so as to be able to be pulled by pulling the finger when the engaging pin 43 is separated from the pin hole 42. [

The present invention relates to a bracket (80) provided on a pen holder (40); And a handle 81 provided on the bracket 80. [

A screw hole 45 is formed from the rear surface of the pen holder 40 toward the front and a fastening hole 83 whose center is aligned with the screw hole 45 is formed in the bracket 80, (80) perpendicular to the rear surface of the pen holder (40).

A slot 82 is formed in the bracket 80 in a vertical direction so that the height of the knob 81 can be adjusted and the insert bolt 86 provided in the knob 81 is inserted into the slot 82, 86 are engaged with the nuts 85 and tightened, the knob 81 is fixed to the bracket 80.

The present invention is characterized by a tap hole (44) formed at both ends of a pen holder (40); A vertical slot 51 formed in the roller support plate 50 so as to be centered with the tapped hole 44; And a hinge bolt 52 coupled to the tapped hole 44 through the vertical slot 51 to secure the roller support plate 50 to the penholder 40.

The tapped holes 44 formed on the right and left sides of the pen holder 40 are formed concentrically and the height of the roller support plate 50 can be freely adjusted by the vertical slots 51. [

The present invention comprises an upper bending plate (53) formed horizontally at an upper end of a roller supporting plate (50); A lower bending plate 54 formed horizontally at a lower end of the roller supporting plate 50; A pair of tilting bolts 55 and 56 provided at a distance from each other in the upper bent plate 53 and pressing the upper surface of the penholder 40; And a lifting bolt 57 installed in a direction facing the tilting bolts 55 and 56 at the center of the lower folding plate 54 and pressing the bottom surface of the penholder 40.

The upper bending plate 53 and the lower bending plate 54 are formed with threaded holes 53a and 53b and 54a for coupling the tilting bolts 55 and 56 and the lifting bolt 57 respectively.

As shown in Figures 13 to 15, when the penholder 40 is moved between the tilting bolts 55 and 56 and the lifting bolt 57 by the pair of tilting bolts 55 and 56 and one lifting bolt 57, And the hinge bolt 52 is lifted or rotated along the vertical slot 51 while the hinge bolt 52 is loosened to prevent the pen holder 40 from being displaced from the center And the roller support plate 50 is fixed to the pen holder 40 when the hinge bolt 52 is tightened tightly.

The present invention relates to an adjusting plate (90) installed on a penholder (40); A transmission plate 91 horizontally formed at the lower end of the adjustment plate 90 and approaching the hardness measurement surface 20 at regular intervals and viewed through the horizontal marking line L1 and the vertical marking line L2; And a reference line 92 formed in the transmission plate 91 so as to be perpendicular to the traveling direction of the roller 62.

The adjustment plate 90 and the transmission plate 91 can be formed using a transparent thermoplastic synthetic resin plate having a constant thickness and the boundary between the adjustment plate 90 and the transmission plate 91 is heated and then bent .

The reference line 92 formed on the transmission plate 91 is formed by linearly forming the V groove 94 on the bottom surface of the transmission plate 91 as shown in an enlarged view of FIG. 12, It can be formed by injecting ink.

The present invention comprises a spacer (100) interposed between an adjustment plate (90) and a penholder (40); An elongated hole 93 formed in the adjustment plate 90 to avoid interference of the engagement pin 43; And a semicircular groove 88 (102) formed at the lower end of the bracket 80 and the spacer 100 to avoid the interference of the latching pin 43.

The spacer 100 prevents the tip of the insert bolt 86 provided on the handle 81 from interfering with the barrel 70 and can be formed of a metal plate or a plastic plate having a constant thickness.

The fastening holes 95 and the fastening holes 104 are formed in the adjusting plate 90 and the spacer 100 so as to be coincident with the screw holes 45 formed in the pen holder 40, Thereby allowing the bolt 87 to pass through.

The present invention is characterized in that a rectangular plate-shaped iron plate 302 provided on the bottom surface of the pen holder 40 and having a constant thickness; A pen lid 300 covering the lower portion of the marking pen 30 exposed at the bottom of the pen holder 40 and the pen tip 32; A flange 306 formed at the top of the pen lid 300; Shaped rubber magnet packing 304 adhered to the flange 306 and adsorbed to the iron plate 302 and having a constant thickness.

18, the pen lid 300 may be formed in the form of a rectangular box with an open top, and the steel plate 302 and the rubber magnet packing 304 are formed into a rectangular shape having a constant thickness .

The steel plate 302 is adhered to the bottom surface of the pen holder 40 and the rubber magnet packing 304 can be adhered to the top surface of the flange 306 formed on the top of the pen lid 300.

The present invention is characterized in that it comprises a rotating slit (206) provided on a rotating shaft (61); A photo interrupter 204 for outputting a pulse signal while repeating light shielding and transmission by the rotating slit 206; And a display unit 208 for displaying the travel distance of the roller 62. [

19, the rotating slit 206 may be formed by forming a groove in the periphery of the disk, and the rotating slit 206 may be provided on the rotating shaft 61 so that the roller 62 So that the rotating slit 206 is rotated together with the rotating shaft 61.

The photo interrupt 204 may be configured such that the light emitting element and the light receiving element are built so as to face each other with a distance therebetween. By using the L-shaped angle 205 as shown in FIG. 19, And the rotary slit 206 is positioned in the central groove of the photo interrupt 204. [

The present invention includes a reset switch (SW1) for initializing the travel distance output to the display unit (208); A setting switch SW2 for storing the driving distance output to the display unit 208 as a target distance; A down switch SW3 for initially outputting a target distance to the display unit 208 and switching to a countdown mode; And a piezoelectric buzzer 202 for outputting a termination sound.

The reset switch SW1, the setting switch SW2 and the down switch SW3 connected to the input port of the control unit 200 are connected to the power source through the pull-up resistors R1 (R2) and R3 When the reset switch SW1, the setting switch SW2 and the down switch SW3 are pressed, a low level potential is input to the input port of the control unit 200, and the reset switch SW1, the setting switch SW2, When the down switch SW3 is released, a high level potential is input to the input port of the control unit 200. [

The piezoelectric buzzer 202 can be configured to be active or passive, and is audibly informed by being driven by the control unit.

The present invention counts the pulse signal input from the photo interrupt 204 and calculates the travel distance of the roller 62. When a signal is inputted from the reset switch SW1, the screen of the display unit 208 is cleared, When the signal from the setting switch SW2 is inputted, the driving distance outputted to the display unit 208 is stored as the target distance, and when the signal is inputted from the down switch SW3, And a control unit 200 for outputting a stop sound through the piezoelectric buzzer 202 when the travel distance displayed on the display unit 208 reaches the zero state, .

The control unit 200 may include an on-chip or on-board microcontroller having a program memory (EEPROM), a data memory (RAM), an arithmetic processing unit, an input / output port, a counter, a timer,

The controller 200, the display unit 208, the photo interrupt 204, and the piezoelectric buzzer 202 may be configured to receive power from a power supply unit (not shown) comprising a battery and a constant voltage circuit. A power switch (not shown) may be added so that power can be supplied or cut off as needed.

The travel distance by the control unit 200 is calculated by multiplying the rotation number of the roller 62 detected by the rotation slit 206 by the circumferential length of the roller 62. [

19, the unit of travel distance output to the display unit 208 may be expressed in meters or inches. The display unit 208 may be a character liquid crystal display, a dot liquid crystal display, a seventh segment light emitting device, or the like Can be configured.

Hereinafter, the operation according to the present invention will be described in detail with reference to the accompanying drawings.

For example, when the horizontal marking line L1 is drawn on the hardness measuring surface 20 having a vertical surface such as a concrete wall surface, as shown in Figs. 8 and 9, The pen holder 40 is linearly transported from the upper side to the lower side while the roller 62 is moved downward along the hardness measurement surface 20 when the handle 81 is pulled downward after the guide member 62 is brought into close contact with the hardness measurement surface 20 .

At this time, since the pen point 32 formed on the marking pen 30 is in contact with the hardness measuring surface 20 and a plurality of marking pens 30 are provided on the pen holder 40, A plurality of parallel horizontal marking lines L1 are formed on the hardness measuring surface 20. [

When five marking pens 30 are provided on the pen holder 40 as in the illustrated example, five lines of horizontal marking lines L1 can be displayed at a time.

When the roller 62 rolls along the hardness measurement surface 20, the rotary shaft 61 serves to cause the rollers 62 located at the left and right sides to rotate simultaneously, thereby helping the roller 62 to run straight, The bearing 60 acts to smoothly rotate the rotary shaft 61 and the roller 62. [

The preload spring 71 provided on the barrel 70 functions to press the pen tip 32 toward the hardness measurement surface 20 at a constant pressure and at the same time, the pen tip 32 is pressed against the curved hardness measurement surface 20, , It functions to form a sharp and non-breaking line by projecting and buffering action.

When the roller 62 is separated from the hardness measuring surface 20, the pen tip 32 is separated from the hardness measuring surface 20. At this time, the knob 81 is horizontally positioned as shown in FIG. 10, When the roller 62 is brought into close contact with the hardness measuring surface 20 and the handle 81 is pulled to the right while the reference line 92 formed on the horizontal marking line 91 is parallel to the horizontal marking line L1, A longitudinal marking line L2 perpendicular to the longitudinal direction mark L1 is displayed on the hardness measurement surface 20 and a grid line is displayed by the two horizontal marking lines L1 and the vertical marking lines L2.

In this state, when the hardness is measured by hitting the intersection point of the two horizontal marking lines L1 and the vertical marking lines L2, the hardness can be measured at a checkerboard ridge.

When the height of the knob 81 is to be adjusted, the nut 85 provided on the knob 81 can be lifted up and down along the slot 82 when the nut 85 is loosened. The handle 81 is fixed to the bracket 80 by tightly tightening the nut 85 that has been loosened.

If the transparent plate 91 is excessively moved away from the hardness measurement surface 20, the measurement accuracy is lowered. If the transparent plate 91 is too close to or brought into contact with the hardness measurement surface 20, the surface of the transparent plate 91 is scratched Or the frictional resistance may affect the straight running of the roller 62, the transmission plate 91 should be brought close to the hardness measurement surface 20 at an appropriate distance.

At this time, when the fixing bolt 87 is loosened, the adjusting plate 90 connected to the transmitting plate 91 can be vertically moved up and down. When the adjusting plate 90 is lifted and lowered, So that the adjustment plate 90 is not interfered with the fixing bolt 87.

When the height of the transmission plate 91 is appropriately adjusted by the adjustment plate 90 and then the fixing bolt 87 that has been loosened is tightened again, the transmission plate 91 is fixed.

When the marking pen 30 is replaced with a new one, the marking pen 30 must be detached from the penholder 40. At this time, as shown in FIGS. 2 and 3, the engaging pin 43 is pulled, The engaging of the marking pen 30 is released and the marking pen 30 protrudes out of the penholder 40 by the repulsive force of the preload spring 71 so that the marking pen 30 is pressed against the barrel 70 and the penholder 40).

Thereafter, when the new marking pen 30 is inserted into the barrel 70 through the through hole 41 formed in the pen holder 40 and then raised, the preload spring 71 is pressed. At this time, The engaging protrusion 31 formed on the marking pen 30 is caught by the engaging pin 43 to prevent the marking pen 30 from being detached from the penholder 40. [

When the pen tip 32 is left exposed in the air after use, the ink flowed out to the pen tip 32 is shortened to shorten the life of the pen tip 32. To prevent this, as shown in Figs. 17 and 18 The rubber magnet packing 304 attached to the flange 306 of the pen lid 300 is brought into close contact with the steel plate 302 adhered to the bottom surface of the pen holder 40 so that the rubber magnet packing 304 is magnetically attracted 302, the pen nib 32 is sealed by the pen lid 300.

When adjusting the height and tilt of the marking pen 30, the elevating bolt 57 is lowered while the hinge bolt 52 is loosened as shown in FIG. 14, and then the tilting bolts 55 and 56 are all the same The penholder 40 and the marking pen 30 are lowered and the hinge bolt 52 is tightly tightened to fix the penholder 40 at a lowered height.

On the contrary, if the tilting bolts 55 and 56 are lifted up to the same distance with the hinge bolt 52 loosened and then the lifting bolt 57 is raised and tightly tightened, the pen holder 40 and the marking pen 30, And when the hinge bolt 52 is tightly tightened, the penholder 40 is fixed at the raised height.

When the marking pen 30 is to be tilted to one side, when the tilting bolts 55 and 56 are turned in directions opposite to each other with the hinge bolt 52 loosened as shown in FIG. 15, The marking pen 30 can be tilted in one direction and the inclination of the marking pen 30 is adjusted and then the hinge bolt 52 is rotated again When tightly tightened, the pen holder 40 is fixed to the roller supporting plate 50 while being inclined.

On the other hand, when the lengths of the horizontal marking line L1 and the vertical marking line L2 drawn on the hardness measuring surface 20 are measured in real time and visually confirmed, it is possible to accurately draw the line. In this case, When the roller 62 rolls along the hardness measurement surface 20 in a state where power is supplied from the power supply device (not shown) to the control unit 200, the display unit 208, the photointerrupt 204 and the piezoelectric buzzer 202 , The rotating slit 206 is rotated by the rotating shaft 61.

At this time, the light emitting element and the light receiving element built in the photo interrupter 204 are repeatedly shielded and transmitted by the rotating slit 206 to output a pulse signal. The controller 200 controls the pulse signal input from the photo interrupter 204 Calculates the number of revolutions of the roller 62, and then calculates the distance of travel based on the calculated number of revolutions and the circumferential length of the roller 62.

Then, the control unit 200 displays the driving distance through the display unit 208. The driving distance outputted to the display unit 208 in the initial state in which the power is applied is the distance from the driving distance of the roller 62 And displayed in a stepwise manner.

Since the end of the horizontal marking line L1 and the vertical marking line L2 can be easily grasped while confirming the travel distance of the roller 62 by the display unit 208, it is possible to draw an accurate length.

9, when the horizontal marking line L1 is displayed and then the reset switch SW1 is pressed, a low level potential is inputted to the input port of the control unit 200. At this time, the control unit 200 controls the display unit 208 , The display unit 208 can display the length of the vertical marking line L2 on the display unit 208 as shown in FIG.

When the setting switch SW2 is pressed when the running distance of the roller 62 outputted to the display unit 208 reaches the end point while displaying the horizontal marking line L1 for more convenient use, When the low level potential is input to the input port, the control unit 200 stores the driving distance output to the display unit 208 as a target distance in the built-in memory.

10, when the vertical marking line L2 is displayed on the hardness measuring surface 20, the controller 200 outputs the target distance stored in the initial screen of the display unit 208, 62 to count down the target distance and output the target distance.

At this time, when the running distance of the roller 62 coincides with the target distance and "0" is output to the display unit 208, the control unit 200 outputs a termination sound through the piezoelectric buzzer 202, do.

20: Hardness measurement plane L1: Horizontal marking line
L2: Vertical marking line 30: Marking pen
31: latching jaw 32: nib
40: Penholder 41: Through hole
42: pin hole 43: engaging pin
44: tapped hole 45: screw hole
50: roller supporting plate 50a, 50b: circular hole
51: vertical slot 52: hinge bolt
53: upper bending plate 54: lower bending plate
53a, 53b, 54a: screw holes 55, 56: tilting bolt
57: lifting bolt 60: bearing
61: rotating shaft 62: roller
70: Barrel 71: Preload spring
72: plug 80: bracket
81: handle 82: slot
83, 104: fastening hole 84: washer
85: Nut 86: Insert bolt
87: Fixing bolts 88,102: Semicircular groove
90: Adjustment plate 91: Transmission plate
92: Reference line 93: Slot
94: V-groove 95: fastening hole
100: spacer 200:
202: Piezoelectric buzzer 204: Photointerrupter
205: Angle 206: Rotating slit
208: Display unit SW1: Reset switch
SW2: Setting switch SW3: Down switch
R1, R2, R3: Pull-up resistor 300: Pen lid
302: steel plate 304: rubber magnet packing
306: Flange

Claims (7)

A plurality of marking pens (30) having a horizontal marking line (L1) and a vertical marking line (L2) drawn on the hardness measuring surface (20) and a latching step (31) on a lower outer peripheral surface;
A penholder 40 having through holes 41 through which the marking pen 30 is inserted, the penholes 40 being formed in series at regular intervals along the longitudinal direction;
A pair of roller supporting plates 50 installed parallel to each other at both ends of the pen holder 40;
A bearing 60 installed on the roller support plate 50;
A pair of parallel shafts (61) having opposite ends supported by an inner ring of the bearing (60);
A plurality of rollers 62 installed at both ends of the rotating shaft 61 to roll the hardness measuring surface 20;
A barrel 70 inserted into an upper end of the through hole 41 to receive the marking pen 30;
A preload spring 71 installed inside the barrel 70 and pressing the pen tip 32 of the marking pen 30 toward the hardness measuring surface 20;
A cap 72 installed at an upper end of the barrel 70 to support the upper end of the preload spring 71;
A pin hole (42) formed horizontally in the pen holder (40) and passing through the through hole (41);
A locking pin 43 inserted into the pin hole 42 and engaged with the locking protrusion 31;
A bracket 80 installed on the pen holder 40;
A handle 81 installed on the bracket 80;
Wherein the rebound hardness position display device for safety diagnosis of a structure includes: The method according to claim 1,
A tab hole 44 formed at both ends of the pen holder 40;
A vertical slot 51 formed in the roller support plate 50 so as to be centered with the tapped hole 44;
A hinge bolt (52) coupled to the tapped hole (44) through the vertical slot (51) and fixing the roller support plate (50) to the penholder (40);
Wherein the rebound hardness position display device for safety diagnosis of a structure includes: The method of claim 2,
An upper bending plate 53 horizontally formed on an upper end of the roller supporting plate 50;
A lower bending plate 54 formed horizontally at a lower end of the roller supporting plate 50;
A pair of tilting bolts 55 and 56 provided at a distance from each other in the upper bent plate 53 and pressing the upper surface of the pen holder 40;
A lifting bolt (57) installed at a center of the lower bending plate (54) in a direction facing the tilting bolts (55) and (56) and pressing the bottom surface of the pen holder (40);
Wherein the rebound hardness position display device for safety diagnosis of a structure includes: The method according to claim 1,
An adjustment plate (90) installed on the pen holder (40);
A transparent plate 91 which is horizontally formed on the lower end of the adjustment plate 90 and which is adjacent to the hardness measurement surface 20 at regular intervals and is viewed through the horizontal marking line L1 and the vertical marking line L2, ;
A reference line 92 formed on the transmission plate 91 so as to be perpendicular to the traveling direction of the roller 62;
Wherein the rebound hardness position display device for safety diagnosis of a structure is characterized by comprising: The method of claim 4,
A spacer (100) interposed between the adjustment plate (90) and the pen holder (40);
A slot (93) formed in the adjustment plate (90) to avoid interference of the engagement pin (43);
A semicircular groove (88) (102) formed at the lower end of the bracket (80) and the spacer (100) to avoid the interference of the retaining pin (43);
Wherein the rebound hardness position display device for safety diagnosis of a structure is characterized by comprising: The method according to claim 1,
An iron plate 302 of a rectangular shape having a predetermined thickness and provided on the bottom surface of the pen holder 40;
A pen lid 300 covering the lower portion of the marking pen 30 exposed on the bottom surface of the penholder 40 and the pen point 32;
A flange (306) formed at the top of the pen lid (300);
Shaped rubber magnet packing 304 adhered to the flange 306 and adsorbed on the steel plate 302 and having a constant thickness;
Wherein the rebound hardness position display device for safety diagnosis of a structure is characterized by comprising: The method according to claim 1,
A rotating slit 206 provided on the rotating shaft 61;
A photo interrupter 204 for outputting a pulse signal while repeating light shielding and transmission by the rotating slit 206;
A display unit 208 for displaying the travel distance of the roller 62;
A reset switch (SW1) for initializing a travel distance output to the display unit (208);
A setting switch (SW2) for storing the traveling distance being output to the display unit (208) as a target distance;
A down switch SW3 for initially outputting a target distance to the display unit 208 and switching to a countdown mode;
A piezoelectric buzzer 202 for outputting an end tone;
The pulse counted by the photo interrupts 204 is counted to calculate the travel distance of the roller 62. When a signal is input from the reset switch SW1, the screen of the display unit 208 is cleared, When a signal is inputted from the setting switch SW2, the driving distance outputted to the display unit 208 is stored as a target distance. When a signal is inputted from the down switch SW3 And outputs a stop sound through the piezoelectric buzzer 202 when the travel distance displayed on the display unit 208 reaches a zero state, (200);
Wherein the rebound hardness position display device for safety diagnosis of a structure includes:

Images