KR102631276B1 - Portable tape measure that can be used for safety inspection and diagnosis - Google Patents

Abstract

The present invention relates to a portable tape measure that can be used during safety inspection and diagnosis to measure the length and width of cracks. A portable tape measure that can be used for safety inspection and diagnosis according to an embodiment of the present invention includes a tape main body in which a blade for measuring length or distance with a scale marked on it is wound and pulled out, a main body holder portion in which the tape main body is seated and fixed, and the main body. A holder support part extending forward in the direction in which the blade is withdrawn from the tape measure body seated on the holder part, and a holder support part through which the blade passes, is installed to be rotatable up and down on the holder support part to force the blade according to the direction of rotation. It includes a vertical switching head part that bends upward or downward to change the pulling direction of the blade to upper or lower.

Description

Portable tape measure that can be used for safety inspection and diagnosis}

The present invention relates to a portable tape measure that can be used during safety inspection and diagnosis to measure the length and width of cracks.

In general, when a certain period of time has passed or problems such as cracks occur in a building, safety inspections and diagnosis are performed to determine the safety of the building.

Because the safety of buildings is most closely related to cracks, safety diagnosis and inspections focus on inspecting areas where cracks occur.

When measuring a crack, the length, width, depth, etc. of the crack are measured. When measuring this crack, a portable tape measure is often used. The tape measure for use during safety diagnosis is Korean Patent Publication No. 10-2019725. (Notice dated September 9, 2019) “Tape measure for structural safety diagnosis” has been disclosed.

The conventional structural safety diagnosis tape measure described above includes a known tape measure built into a case with a graduated ruler wound on a roll (not shown), a hole drilled in a hanger formed on one side of the ruler, and located at the 0 scale of the ruler; A measuring string is connected to the hole, and a conductor is connected to the other end of the measuring string. The conductor is attached to a magnet formed on one side of the case of the tape measure, and the measuring string is attached at one end to an axis formed in the center of the inside of the conductor. It is intended to provide a tape measure for structural safety diagnosis that is configured to be connected to the other end of the fixed coil spring. The effect of the present invention is to allow both a string tape and a steel tape measure to be used, and the advantages of a steel tape measure and a string tape measure. By allowing all of them to be utilized, it can be usefully used to measure length for safety diagnosis, and the length of a crack formed on a curved surface or the length of a curved object can be easily and conveniently measured. A string tape and an iron tape can be used in conjunction with each other. It was possible to compensate for the shortcomings of the iron tape and the shortcomings of the string tape.

However, the conventional structure safety diagnosis tape measure is fixed in only one direction, so it is not only difficult to adjust the direction of the tape measure in places where it is difficult to fix the tape measure or change its location, but also to check the graduations of the tape measure. There was a problem in that when moving the hook on the object to be measured, the hook easily came off and had to be measured again.

In addition, the conventional structural safety diagnosis tape measure had a problem in that it was difficult to measure crack widths smaller than the minimum unit of the scale indicated on the tape measure.

The present invention was created to solve the above-mentioned problems, and the problem to be solved by the present invention is to install a vertical switching head in front of where the blade is drawn out, and in the vertical switching head part, a left and right switching head that rotates in the vertical switching head part. By installing it, you can easily measure the object to be measured by changing the drawing direction of the blade in various directions with respect to the tape measure body, and also prevent the hook on the object to be measured from being separated when the position of the tape measure body changes, thereby maintaining the hook. The purpose is to provide a portable tape measure that can be used for safety inspection and diagnosis, eliminating the inconvenience of having to hang the measurement object again.

In addition, a width measuring groove is formed on the blade to measure the crack width, making it possible to easily measure the crack width, and by enlarging the width measurement groove through an enlarged viewing unit, safety inspection and diagnosis can accurately measure the crack width. The purpose is to provide a portable tape measure that can be used when

A portable tape measure that can be used during safety inspection and diagnosis according to an embodiment of the present invention to achieve the above-described task is a tape main body in which a blade for measuring length or distance is wound and drawn out with a scale displayed, and the tape main body is seated and fixed. a main body holder part, a holder support part extending forward in the direction in which the blade is withdrawn from the tape measure main body seated on the main holder part, and a holder support part through which the blade passes and is installed to be rotatable up and down in the holder support part in the direction of rotation. It includes a vertical switching head part that forcibly bends the blade upward or downward to change the pulling direction of the blade to the upper or lower direction.

It may include a left-right switching head that is rotatably coupled to the vertical switching head part so that the displayed scale of the blade is viewed left or right, and forcibly twists the blade to the left and right to withdraw it.

The blade may include a plurality of width measurement grooves spaced apart from each other along the longitudinal direction of the blade to measure the crack width.

The holder support unit may include an enlarged perspective unit that enlarges a portion of the blade passing through the holder support unit to enlarge and view the width measurement groove and the crack width.

According to the present invention, the direction in which the blade is drawn out can be changed in various ways by the up-down switching head part and the left-right switching head in the main body holder part where the tape measure main body is seated, so that the length or distance can be measured in various directions even with the tape main body fixed. This not only makes it possible to easily perform safety inspections and diagnosis, but also prevents the hook from coming off due to a change in the position of the tape body, eliminating the inconvenience of having to re-hook the hook to the object to be measured.

In addition, the width measurement grooves that measure the crack width are formed on the blade with different widths, so not only can the width of the crack be easily measured by matching the width measurement groove and the crack width, but the width measurement groove can also be enlarged and observed through an enlarged perspective unit. By doing so, the crack width can be accurately measured.

Figure 1 is a perspective view showing a portable tape measure that can be used for safety inspection and diagnosis according to an embodiment of the present invention.
Figure 2 is an enlarged perspective view of the up-down switching head part constituting a portable tape measure usable for safety inspection and diagnosis according to an embodiment of the present invention, showing the rotating state of the up-down switching head part and the left-right switching rotation part.
Figure 3 is a side cross-sectional view of a vertically switching head part constituting a portable tape measure that can be used for safety inspection and diagnosis according to an embodiment of the present invention.
Figure 4 is a front view showing the rotational state of the left and right switching head portion constituting a portable tape measure that can be used for safety inspection and diagnosis according to an embodiment of the present invention.
Figure 5 is a plan view showing a state in which crack width is measured through a width measurement groove formed on a blade constituting a portable tape measure that can be used for safety inspection and diagnosis according to an embodiment of the beam invention.

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

The portable tape measure 100, which can be used during safety inspection and diagnosis according to an embodiment of the present invention, can measure the length, width, distance, height, etc. of the object to be measured, and especially measures the length or width of a crack during safety diagnosis. You may.

As shown in FIG. 1, a portable tape measure 100 that can be used for safety inspection and diagnosis according to an embodiment of the present invention may include a tape measure body 110.

This tape body 110 has a blade 111 marked with a scale for measuring the length wound inside a roll, and at the end of the blade 111, a blade 111 is attached to the object to be measured to measure the length. A body clip may be installed to hang and secure the end.

A mainspring is installed in the tape measure body 110, and when the blade 111 is withdrawn, the mainspring is wound and the elastic force is measured. When the fixed blade 111 is released, the blade 111 is wound by the elastic force of the mainspring. As the roll rotates, the drawn blade 111 is wound around the roll and may be inserted into the tape measure main body 110.

The tape measure body 110 has a fixing mechanism that stops the rotation and re-winding of the roll by the mainspring while the blade 111 is pulled out, fixes the drawn-out state of the blade 111 so that it can be wound, or releases the fixation. Button 115 may be installed.

The fixing button 115 can press the blade 111 to prevent the roll from rotating due to the mainspring.

The fixing button 115 may be configured to fix the blade 111 by sliding, or by pressing, like a known tape measure.

As shown in FIG. 1, the portable tape measure 100 that can be used for safety inspection and diagnosis according to an embodiment of the present invention may include a main body holder portion 120.

This main body holder part 120 can be detachably coupled to the tape measure main body 110, and a receiving space into which the tape measure main body 110 can be inserted or fitted can be formed in the main body holder part 120.

In the embodiment, the main body holder part 120 has side walls 121 built on both sides of the bottom part 123, and the tape measure main body 110 is seated in the accommodation space formed between the side wall part 121 and the bottom part 123. Although it is formed as such, the main body holder portion 120 may be configured to partially insert the tape measure body 110 or to surround the outer surface of the tape measure main body 110.

The tape measure main body 110, which is seated on the main body holder part 120, can be seated so that the blade 111 is pulled out between the two side wall parts 121, and between the two side wall parts 121 of the main body holder part 120. A clip groove may be formed into which the body clip, which is installed on the tape measure body 110 and can be held by the worker, is inserted so that it is not exposed to the outside, or the body clip may be combined in a way that it hangs over the side wall.

The side walls 121 on both sides of the main body holder part 120 are provided to prevent the tape measure body 110 from being separated from the main body holder part 120 by covering the upper exposed part of the tape measure body 110 seated in the receiving space. A fixing band 125 may be installed.

The fixing band 125 is implemented in the form of a band having elasticity connecting the side walls 121 on both sides, or is implemented as a Velcro tape, so that either arm Velcro or male Velcro is formed in the form of a band, so that both side wall parts ( 121), and another Velcro may be installed on the other of the two side wall portions 121 to be fixed by combining the arm Velcro and the male Velcro.

In addition, the bottom portion 123 of the main body holder portion 120 is formed by placing the vertical switching head portion 130, which will be described below, in a straight line with the blade 111. ) may be formed at a preset height so that the lower end is level with the ground, or the support may be formed to protrude from the lower part of the bottom part 123 so as to be at a level parallel to the vertical switching head part 130.

In addition, a holder pad (not shown) may be installed on the bottom of the bottom 123 of the main body holder part 120 to prevent the main body holder part 120 from sliding on the floor where the length is to be measured and changing the measurement position. , the holder pad may be implemented as an elastic rubber or gel-type jelly pad.

As shown in Figures 1 and 2, the portable tape measure 100 that can be used for safety inspection and diagnosis according to an embodiment of the present invention may include a holder support portion 127.

This holder support portion 127 can support the vertically switching head portion 130, which will be described below, in the main body holder portion 120.

The holder support portion 127 may be formed by extending from the main body holder portion 120 in the direction in which the blade 111 is withdrawn from the tape measure main body 110, and the main body holder portion 120 is provided at each side wall portion 121 on both sides. By extending by a preset length, the vertical switching head part 130 can be positioned at a distance in front of the tape measure main body 110 where the blade 111 is pulled out.

The main body holder portion 120 may be rotatably coupled to the end of the holder support portion 127.

Here, the holder support portion 127 also performs the function of supporting the vertical switching head portion 130, which will be described below, but the holder support portion 127 blocks the entry of fingers, etc. on both sides of the blade 111, thereby blocking the blade ( When 111) is inserted while being wound by the elastic force of the mainspring, it may perform a safety function to prevent accidents caused by cuts on the blade 111.

As shown in FIGS. 2 and 3, the portable tape measure 100 that can be used for safety inspection and diagnosis according to an embodiment of the present invention may include a vertically switching head portion 130.

This vertical switching head part 130 is installed on the holder support part 127 and can bend the blade 111 upward or downward to change the direction in which the blade 111 is drawn out to the upper or lower side.

The vertical switching head part 130 is installed to be rotatable up and down on the holder support part 127 and the blade 111 passes through the center, so that the blade 111 moves as the vertical switching head part 130 rotates. The direction in which the blade 111 is drawn relative to the tape measure body 110 can be changed by bending upward or downward.

The vertical switching head part 130 may be located between the holder supports 127 located on both sides, and the blade 111 enters the vertical switching head part 130 when the vertical switching head part 130 rotates up and down. The direction in which the tape body 110 is located on both sides of the vertical switching head part 130 so that the height is located below the blade 111 when rotating downward and is located above the blade 111 when rotating upward. A head support portion 131 that extends and is rotationally coupled to the holder support portion 127 may be formed.

In addition, a hinge pin 133 is formed to protrude in a direction facing each other on one of the holder support portion 127 and the head support portion 131 coupled to rotate with each other, and a hinge hole into which the hinge pin 133 is inserted is formed on the other one. (128) is formed so that the hinge pin 133 is fitted into the hinge hole 128, so that the vertical switching head part 130 can rotate up and down in the holder support part 127.

In addition, an upper and lower fixing protrusion 129 is formed on one of the head support portion 131 and the holder support portion 127 coupled to rotate with each other, and an upper and lower protrusion groove 135 into which the head fixing protrusion is inserted is formed on the other. The upper and lower fixing protrusions 129 may be formed in an eccentric position with respect to the hinge pin 133.

And the vertical projection groove 135 is the portion where the upper and lower fixing projections 129 are located and the upper and lower switching head portion with respect to the blade 111 when the vertical switching head portion 130 is rotated vertically upward with respect to the blade 111. When (130) is rotated vertically downward, the upper and lower projection grooves 135 are formed in the portion where the upper and lower fixing projections 129 are located, so that the vertical switching head portion 130 is rotated upward or downward on the holder support portion 127. It can be fixed in the ordered state.

Here, the vertical switching head portion 130 is described as being vertically upward and downward, but the upper and lower fixing protrusions 129 are moved upward or downward in the form of a diagonal line at a certain angle according to the upper and lower protrusion grooves 135 to which the tape measure body is fixed. Of course, the blade 111 can be drawn out in an inclined form with respect to (110).

Although not shown in the drawing, the blade 111 is inserted to the side with the tape measure body 110 seated on the main body holder 120 on the side of the vertical switching head 130 and the left and right switching head 140. In order to insert into the hole 141, a cut groove is formed that is cut in the horizontal direction and communicates with the outlet hole 141, or the up and down switching head part 130 and the left and right switching head 140 are formed around the outlet hole 141. After inserting the blade 111 into the drawing hole 141 by dividing it into upper and lower parts, the bisected upper and lower switching head part 130 and the left and right switching head part 140 are overlapped and fixed to form the upper and lower switching head part 130 and the left and right switching head part 130. The blade 111 can be installed by inserting it into the head 140.

As shown in FIGS. 2 to 4, the portable tape measure 100 that can be used for safety inspection and diagnosis according to an embodiment of the present invention may include a left and right switching head 140.

This left and right switching head 140 is installed to be rotatable left and right around the vertical switching head part 130, and the scale displayed on the blade 111 is based on the tape measure main body 110. The blade 111 can be guided to be pulled out by twisting the blade 111 to the left or right so that it can be seen from the left or right.

An outlet hole 141 through which the blade 111 penetrates and is drawn out may be formed in the left and right switching head 140, and the outlet hole 141 may be formed in a shape corresponding to the cross section of the blade 111.

The left and right switching head 140 can be inserted and fitted into the center of the up and down switching head part 130, and the left and right switching head 140 is in a state in which the left and right switching head 140 is rotated in the up and down switching head part 130. Left and right fixing protrusions 137 and left and right protrusion grooves 147 for fixation may be formed.

The left and right fixing protrusions 137 and the left and right protruding grooves 147 are formed on one of the left and right switching head 140 and the up and down switching head part 130, and the left and right protruding grooves 147 are formed on the other. ) is formed, and the left and right protruding grooves 147 are located at the position where the left and right switching head 140 is rotated 90° to the left in the vertical switching head part 130 and the left and right switching head 140 in the vertical switching head part 130. It is formed in a position rotated 90° to the right, and can be fixed in the vertical switching head part 130 with the left and right switching head 140 rotated 90° to the left or right.

At this time, the left and right fixing protrusions 137 and the left and right protruding grooves 147 are formed on the opposite periphery of the left and right switching head 140 and the up and down switching head part 130, and the left and right switching head 140 is a vertical switching head part ( 130), and a head flange part 143 is formed around the end of the left and right switching head 140, and between the head flange part 143 and the vertical switching head part 130, a left and right switching head ( A close contact spring 145 is installed to closely support 140) by elastic force in the direction in which the vertical switching head part 130 is located.

In this way, the left and right switching head 140 is in close contact with the up and down switching head part 130 by elastic force by the adhesion spring 145, so when the left and right switching head 140 is rotated in the up and down switching head part 130, the vertical switching head 140 As the left and right switching head 140 slides forward in the unit 130 and compresses the adhesion spring 145, the left and right fixing protrusions 137 are separated from the left and right protruding grooves 147, and the left and right fixing protrusions 137 are separated from the left and right protruding grooves 147, As the left and right fixing protrusions 137 are inserted into the protrusion grooves 147, the left and right switching head 140 can be fixed to the rear, which is the position of the up and down switching head unit 130, by the elastic force of the adhesion spring 145. .

As shown in FIG. 5, the portable tape measure 100 that can be used for safety inspection and diagnosis according to an embodiment of the present invention may include a width measurement groove 117.

This width measuring groove 117 can measure the width of the crack groove formed by the crack.

The width measurement groove 117 may be formed in the blade 111, and a plurality of width measurement grooves 117 may be formed to penetrate the blade 111 to have different widths along the longitudinal direction of the blade 111. You can.

At this time, a plurality of width measuring grooves 117 having different widths may be formed on the blade 111 so that the width gradually increases or becomes smaller as the blade 111 is pulled out.

The width of the crack can be measured by finding the width measuring groove 117 whose width matches the crack width.

At this time, the width measurement groove 117 having the largest width among the width measurement grooves 117 may be formed to have a width equal to or smaller than the minimum scale indicated on the blade 111.

For example, when the minimum scale of the blade 111 is 1 mm, the plurality of width measurement grooves 117 are formed to have different widths in units of 0.1 mm, which is smaller than 1 mm, so that the width can be measured by the blade 111. It is also possible to measure difficult crack widths.

Of course, when measuring the crack width, the crack width can be measured by pulling out the blade 111 wound on the blade 111 and finding the crack width to match the width measurement groove 117 formed on the blade 111. The width of the width measurement groove 117 is displayed next to the width measurement groove 117. If you find the width measurement groove 117 that matches the crack width, you can measure the crack width by reading the size of the width displayed next to it.

The portable tape measure 100 that can be used for safety inspection and diagnosis according to an embodiment of the present invention may include an enlarged viewing unit 150.

This enlarged perspective unit 150 can magnify the blade 111 to measure the crack width or to read the scale measuring the length.

The enlarged perspective unit 150 may be installed in a form that connects the upper part of the holder support unit 127 on one side to allow an enlarged view of the portion of the blade 111 passing through the pair of holder support units 127. The part 150 is formed as a transparent body with a convex top, like a convex lens, so that the crack groove can be viewed by enlarging it through the width measurement groove 117, or by enlarging the scale displayed on the blade 111.

Let us explain the actions and effects of each component described above.

The portable tape measure 100, which can be used for safety inspection and diagnosis according to an embodiment of the present invention, has a tape measure main body 110 from which a blade 111 having a scale for measuring the length is drawn out, on both side walls of the main body holder portion 120. It is placed between (121).

The main body holder part 120 has side walls 121 on both sides of the bottom 123, and a fixing band 125 is installed at the top of both side walls 121, so that the tape measure main body ( After inserting 110), the tape measure main body 110 is fixed to the main body holder part 120 by the fixing band 125.

On both side walls 121 of the main body holder 120, holder supports 127 are formed to extend horizontally in the direction in which the blade 111 is pulled out, and the holder support portion 127 has the upper or lower side of the drawn blade 111. A vertical switching head unit 130 is installed to change the up and down direction so that it is drawn out.

Meanwhile, on both sides of the vertical switching head part 130, a head support part 131 is formed to protrude and is rotatably coupled to the holder support part 127 in the direction in which the tape measure body 110 is located, and the head support part 131 and The holder support portion 127 is coupled to each other by a hinge pin 133 and a hinge hole 128 and is rotatably installed so that the front of the vertically switching head portion 130 faces upward or downward in the holder support portion 127.

At this time, between the holder support part 127 and the head support part 131, there are upper and lower fixing protrusions 129 and upper and lower fixing protrusions 129 for fixing the front of the vertical switching head part 130 in an upward or downward state. Upper and lower protruding grooves 135 to be inserted are formed.

In addition, the left and right switching head 140 is installed in the vertical switching head unit 130 to be rotatable around the center of the vertical switching head unit 130 so that the scale can be viewed from the left and right by twisting the blade 111 to the left or right. .

In addition, the left and right switching head 140 is supported by a close contact spring 145 so as to be supported by elastic force in the direction in which the tape measure body 110 is located in the up and down switching head part 130, and the left and right switching head 140 and the upper and lower Left and right fixing protrusions 137 for fixing the left and right switching head 140 in a rotated state and left and right protrusion grooves 147 into which the left and right fixing protrusions 137 are inserted are formed on the surfaces of the switching head unit 130 facing each other. .

In addition, the blade 111 is inserted into the left-right switching head 140, and an outlet hole 141 is formed through the left-right switching head 140 to forcibly rotate the blade 111 to the left or right when rotating the left-right switching head 140. .

The blade 111 is formed with a plurality of spaced apart width measurement grooves 117 having different widths along the longitudinal direction of the blade 111 for measuring the crack width, and at the slope between the pair of holder supports 127. An enlarged perspective unit 150 is configured to magnify the width measurement groove 117 to measure the crack width by aligning the width measurement groove 117 and the crack groove with each other.

The portable tape measure 100 that can be used for safety inspection and diagnosis according to the embodiment of the present invention configured as described above uses the upper and lower switching head portion 130 when measuring the height from the top to the bottom or from the bottom to the top through the blade 111. The vertical switching head part 130 is rotated on the holder support part 127 so that the front side faces upward or downward.

When the vertical switching head unit 130 rotates, the blade 111 over the left and right switching head 140 is forcibly bent upward or downward, and the direction in which the blade 111 is drawn from the tape measure main body 110 is upward. Alternatively, the blade 111 is pulled out upward or downward even if it is not rotated in the downward direction.

As an example of measuring by pulling out the blade 111 in the vertical direction while the tape measure body 110 is fixed in this way, when measuring the height difference between the upper and lower parts of the tape measure main body 110 at a certain height, the tape measure is fixedly installed. In this state, it is difficult to rotate the tape measure body 110 so that the blade 111 outlet of the tape measure body 110 faces the upper or lower side, so the blade 111 is forcibly drawn out by rotating the vertical switching head part 130. Elevation differences can be easily measured by turning the direction upward or downward.

Of course, even if the tape main body 110 is not rotated through the vertical switching head part 130 in a state in which the blade 111 of the tape main body 110 is drawn downward or upward, the distance or length in the left and right directions can also be measured.

In addition, when measuring the length or distance of an object to be measured located diagonally through the blade 111, if the blade 111 of the tape measure body 110 does not maintain the direction in which it is drawn, the hook 113 may fall on the object to be measured. At this time, the tape main body 110 is maintained in a horizontal state, and the angle at which the blade 111 is drawn out is set to a preset angle through the vertical switching head part 130, and then the length of the object to be measured is set. Or you can measure distance.

In addition, when it is difficult to measure with the tape main body 110 standing perpendicular to the side wall 121 because the gap between objects to be measured, such as the side wall 121, is narrow, the tape main body 110 is placed parallel to the side wall 121. In this state, the left and right switching head 140 is rotated in the up and down switching head part 130 so that the scale can be easily checked or the hook 113 can be hung on the object to be measured.

When the left and right switching head 140 rotates, the portion of the blade 111 located between the left and right switching head 140 and the tape body 110 is forcibly rotated, and the blade moves in the direction in which the left and right switching head 140 rotates. (111) The energy is twisted.

When the blade 111 is pulled out in a state where the blade 111 is twisted in this way, the tape body 110 is pulled out while twisting the blade 111 to the left or right in a straight position, and the blade 111 is pulled out through the side facing the operator. The scale can be easily checked.

Of course, the blade 111 can be pulled out by twisting it to the left or right to check the scale, but it can also be pulled out by twisting it to the left or right to be caught by the hook 113.

Meanwhile, when measuring the crack width, the crack width can be measured by pulling out the blade 111 from the tape measure main body 110 and matching the width measurement groove 117 corresponding to the crack width formed on the blade 111.

At this time, measuring the crack width can be performed by enlarging the width measurement groove 117 through the enlarged perspective unit 150 installed on the holder support part 127.

Therefore, the portable tape measure 100 that can be used for safety inspection and diagnosis according to an embodiment of the present invention includes a vertical switching head portion 130 and a left and right switching head 140 at the front where the blade 111 of the tape measure body 110 is pulled out. ) is installed so that the length or distance can be easily measured by changing the drawing direction of the blade 111 to the top, bottom, left, and right without changing the position of the tape measure main body 110, as well as the length or distance of the blade 111. By moving the tape measure body 110 hung at the end, the hook 113 can be prevented from being easily separated from the object to be measured.

In addition, a width measuring groove 117 capable of measuring the crack width is formed on the blade 111, so that the crack width can be easily measured, and an enlarged viewing portion 150 is formed on the holder support portion 127, so that the blade ( The scale of 111) and the width measurement groove 117 can be easily enlarged and confirmed.

Although the embodiments of the present invention have been described above, the scope of the rights of the present invention is not limited thereto, and the embodiments of the present invention can be easily changed by those skilled in the art in the technical field to which the present invention belongs and are recognized as equivalent. Includes all changes and modifications to the extent permitted.

100: portable tape measure 110: tape measure body
111: blade 113: hook
115: fixing button 117: width measurement groove
120: main body holder part 121: side wall part
123: bottom 125: fixing band
127: Holder support 128: Hinge hole
129: Upper and lower fixing protrusions 130: Upper and lower switching head portion
131: head support 133: hinge pin
135: Upper and lower projection grooves 137: Left and right fixing projections
140: Left and right switching head 141: Drawout hole
143: Head flange part 145: Adhesion spring
147: Left and right projection grooves 150: Enlarged perspective section

Claims (4)

A tape measure body on which a blade measuring length or distance with graduations is wound and drawn out;
A main body holder portion on which the tape main body is seated and fixed,
A holder support portion extending forward in the direction in which the blade is withdrawn from the tape measure body seated on the main body holder portion,
A vertical switching head portion through which the blade passes and rotatable up and down on the holder support portion, forcibly bending the blade upward or downward depending on the direction of rotation to change the pulling direction of the blade to the upper or lower portion, and
During safety inspection and diagnosis, comprising a left and right switching head that is rotatably coupled to the up and down switching head part so that the displayed scale of the blade is shown to the left or right and forcibly twists the blade to the left and right to withdraw it. Portable tape measure available. delete According to paragraph 1,
The blade is
A portable tape measure that can be used for safety inspection and diagnosis, comprising a plurality of width measurement grooves spaced apart from each other at different widths along the longitudinal direction of the blade to measure the crack width. According to paragraph 3,
The holder support part
A portable tape measure that can be used for safety inspection and diagnosis, comprising an enlarged perspective unit that magnifies the portion of the blade passing through the holder support unit to enlarge and view the width measurement groove and the crack width.

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