JP2009168660A - Drill hole measuring device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily measure the depth and shape of a formed hole to appropriately perform succeeding construction of an anchor bolt or the like. <P>SOLUTION: The device includes a gauge 102 of a predetermined length having a scale 102a to be inserted to an anchor hole to measure the depth of the anchor hole; a hollow holding part 101 which movably holds the gauge 102; and a plurality of positioning members 105 provided on the holding part 101 and having an energizing force protruding in the width direction of the anchor hole in a state where it is inserted to the anchor hole. The depth of the anchor hole can be measured by observing the scale 102a according to the protruding quantity of the gauge 102 from the holding part 101. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a drilling measuring instrument for measuring a drilling state of an anchor hole drilled when an anchor bolt is provided on concrete or the like, and in particular, an anchor hole necessary for stably pressing and fixing an anchor bolt to an anchor hole. The present invention relates to a perforation measuring instrument capable of accurately measuring the depth and shape of the piercing.

  Conventionally, anchor bolts are used when various members are provided on a concrete wall surface by post-construction. At this time, an anchor hole is first drilled in a concrete wall surface with a drill or the like, and an anchor bolt is inserted into the anchor hole and is fixed with a hammer or the like. The anchor bolt is adapted to be locked and fixed to the anchor hole by expanding the end portion inside the anchor hole due to the driving force. In order to measure whether this locking and fixing state is appropriate, the depth of the anchor hole was measured using a ruler, a scale or the like. Further, a depth measuring device that measures the expanded state of the anchor bolt expanded portion provided in the anchor hole is disclosed (for example, see Patent Document 1 below).

Japanese Patent Laid-Open No. 7-286802

  However, it is difficult to make the depth and shape of the anchor hole drilled by the drill uniform, and the expanded portion of the anchor bolt may not be properly locked and fixed depending on the formation state of the anchor hole. In some cases, poor construction occurred. Even if trying to measure the depth of the anchor hole with a ruler or scale, if the aperture diameter of the anchor hole is small, the ruler or scale could not be inserted, and even when inserted, the depth from the bottom of the hole could not be measured accurately .

  FIG. 6 is a cross-sectional view showing an example of the formation state of the anchor hole. The anchor hole 501 drilled with a drill or the like has a wall portion 501a and has a predetermined depth and shape, but the hole bottom portion 501b is formed in a substantially conical shape. Inclined portions 501c and 501d are provided between the hole bottom portion 501b and the wall portion 501a, respectively. The depth and shape at this time are not made uniform by the operation of the drill, and in the illustrated example, the hole bottom portion 501b is deformed and the deepest position is eccentric from the center of the anchor hole 501. At this time, there is an eccentricity amount d, and the inclined portions 501c and 501d are in an untargeted state.

  FIG. 7 is a diagram illustrating an insertion state of the anchor bolt, and FIG. 8 is a diagram illustrating a driving state of the anchor bolt. The anchor bolt 601 is inserted into the anchor hole 501 shown in FIG. 6 as shown in FIG. 7, and the anchor bolt 601 is driven with a hammer or the like as shown in FIG. At this time, since the hole bottom portion 501b of the anchor hole 501 is eccentric, the center position of the hole bottom portion 501b is not located at the center position of the end (tip) 601a of the anchor bolt 601 and one inclined portion 501c. The end 601a does not reach a sufficiently deep position.

  As a result, the widened portion 602 that should open outward cannot be opened sufficiently by the conical inclined portion 601b, and the locking portion 602a cannot be sufficiently bitten into the wall portion 501a of the anchor hole 501. . And even if the anchor bolt 601 is driven further, the expanded portion 602 remains in a state where it is not sufficiently opened, so that the anchor bolt 601 cannot be reliably locked and fixed in the anchor hole 501 in a stable state.

  In order to prevent the above problem, it is necessary to accurately measure the depth of the anchor hole 501 and the shape of the hole bottom portion 501b. The above-mentioned Patent Document 1 measures the depth of the anchor bolt 601 after placement, and cannot accurately measure the depth of the hole bottom 501b of the anchor hole 501. In addition, since the anchor hole 501 has a narrow opening width (opening diameter) and it is difficult to see the inside, it has been difficult to visually grasp the shape of the hole bottom portion 501b. The above problem cannot be solved simply by measuring the entire depth of the anchor hole 501, and it is necessary to accurately form the depth D from the upper end positions of the inclined portions 501c and 501d shown in FIG. 8 to the hole bottom portion 501b. For this purpose, it is necessary to accurately measure the depth D, but this has not been possible in the past.

  Furthermore, in the technique described in Patent Document 1, it is understood that the anchor bolt 601 is driven while the shape of the hole bottom portion 501b of the anchor hole 501 is defective, and then the expanded state of the expanded portion is not appropriate. For this reason, the anchor bolt 601 that has been laid is wasted, and extra time is required to remove it.

  The present invention provides a drilling measuring instrument that can easily measure the depth and shape of the formed hole and can perform subsequent construction of anchor bolts and the like in order to eliminate the above-described problems caused by the prior art. The purpose is to do.

  In order to solve the above-described problems and achieve the object, a perforation measuring instrument according to the present invention includes a gauge of a predetermined length inserted into a formed hole and having a scale for measuring the depth of the hole, and the gauge. And a plurality of positioning members provided in the holding portion and having a biasing force protruding in the width direction of the hole in a state of being inserted into the hole. To do.

  Further, in the perforation measuring instrument according to the present invention, the plurality of positioning members each include a biasing member that applies a constant biasing force to the holding portion, and the holding portion is inserted into the hole, The holding portion and the gauge are positioned so as to be the center position of the hole.

  According to the present invention, it is possible to easily measure the depth of the hole formed simply by looking at the scale corresponding to the protruding amount of the gauge from the holding portion. Further, the shape of the hole can be obtained from the depth at each position by moving the holding portion in the width direction within the hole. Furthermore, if the urging member is configured to project the positioning member from the holding portion from the holding portion, the holding portion and the gauge can be positioned at the center position of the hole, and the depth at the center position of the hole can be measured.

  According to the perforation measuring instrument of the present invention, the depth and shape of the formed hole can be easily measured. Thereby, it is possible to prevent an excess or deficiency in the depth of the hole to be formed, and to perform an appropriate operation such as anchor bolts for the subsequent hole.

(Embodiment)
Exemplary embodiments of a perforation measuring instrument according to the present invention will be explained below in detail with reference to the accompanying drawings. FIG. 1 is a perspective view showing a perforation measuring instrument according to an embodiment of the present invention. This perforation measuring instrument 100 is roughly constituted by a holding part 101, a gauge 102 and a housing 103.

  The holding portion 101 is formed in a cylindrical shape having a predetermined length and a diameter, and is formed in a hollow shape in which a slide hole 101a penetrating vertically is formed in the center portion. The holding unit 101 is the main body of the perforation measuring instrument 100 and is held during measurement. A fixing tool 101 f such as a screw is provided on the upper portion of the holding portion 101. The fixing tool 101f is screwed into a screw hole 101b portion opened from the outside of the holding portion 101 toward the center slide hole 101a.

  A gauge 102 having a predetermined length longer than the length of the holding portion 101 is provided through the slide hole 101a. This gauge uses stainless steel or steel made of steel that does not bend and expand and contract. The illustrated slide hole 101a and gauge 102 have a small-diameter cross-sectional square shape, and the gauge 102 is configured not to rotate within the slide hole 101a. In addition, the cross-sectional shapes of the slide hole 101a and the gauge 102 may be other cross-sectional shapes such as a cylindrical shape. On the outer periphery of the gauge 102, for example, a scale 102a of a predetermined unit such as a combined use of mm and cm is formed.

  The scale 102a can be formed by marking the gauge 102 or by various methods such as printing with ink. By operating the fixing tool 101f, the position of the gauge 102 that is movable in the length direction of the holding portion 101 can be fixed and held. The scale 102a has various notation methods as will be described later.

  The length of the gauge 102 is longer than the length of the holding portion 101. For example, when the length of the holding portion 101 is 170 mm, the length of the gauge 102 is 250 mm. As a result, the upper end 102c and the lower end 102d of the gauge 102 can be exposed to a predetermined length above and below the holding unit 101, and the gauge 102 can be moved up and down with respect to the holding unit 101.

  A housing 103 formed integrally with the holding unit 101 is provided at the lower end of the holding unit 101. The housing 103 is formed in a substantially disk shape that is larger in diameter than the diameter of the holding portion 101, and is directed outward from the holding portion 101 from a plurality of locations in the circumferential direction (in the illustrated example, four locations at intervals of 90 degrees). A rod-shaped positioning member 105 (centering adjustment rod) is formed to protrude.

  FIG. 2 is a partial cross-sectional view showing the inside of the housing. A housing hole 103a for housing the positioning member 105 is formed inside the housing 103, and a biasing member 104 such as a spring is provided between the housing hole 103a and the rear end 105d of the positioning member 105. The member 104 biases the leading end 105a of the positioning member 105 in a direction in which it projects outward. By making the urging force (spring force) of the urging member 104 the same, the urging forces of the plurality of positioning members 105 protruding from the holding portion 101 can be made uniform.

  The housing 103 and the positioning member 105 are provided with locking pieces 103d and 105e, respectively, to prevent the positioning member 105 from falling off the housing 103. Then, the depth of the formed hole such as the anchor hole 501 described above can be measured using the lower surface 105f of the positioning member 105 as a reference.

(Measurement operation to measure by inserting the holding part into the anchor hole)
Next, an anchor hole measurement operation using the drilling measuring instrument having the above-described configuration will be described. For example, the length between the front ends 105a and 105a of the pair of positioning members 105 and 105 in the linear direction in a state where the positioning member 105 protrudes can be varied from about 15 to 22 mm. Correspondingly, in this case, the opening diameter (diameter) of the anchor hole 501 can be measured with various opening diameters having a range of 15 to 22 mm.

  FIG. 3 is a diagram illustrating an example of a measurement state of an anchor hole using a perforation measuring instrument. First, a case where the perforation measuring instrument 100 is inserted into the anchor hole 501 for measurement will be described.

  The holder 101 is inserted into the anchor hole 501 while the positioning member 105 is contracted. For example, the holding portion 101 of the perforation measuring instrument 100 is gripped, the holding portion 101 is inclined, and the two adjacent positioning members 105 are first inserted into the anchor holes 501 and then the other two positioning members 105 are contracted. Then, it is inserted into the anchor hole 501.

  Thereafter, the holder 101 is inserted into the anchor hole 501 while being held, and the four positioning members 105 are stopped at the position of the boundary between the hole 501a and the hole bottom 501b (the state shown in FIG. 3). If an attempt is made to insert beyond the stop position, a larger operating force is required, so that the state positioned at the illustrated position can be easily known. At this time, the urging forces of the four positioning members 105 are balanced, and the gauge 102 is positioned at a substantially central position in the anchor hole 501.

  In the state shown in FIG. 3, it cannot be determined from the outside whether the gauge 102 is located at the deepest hole bottom 501 b of the anchor hole 501. Accordingly, the operator then moves and operates the perforation measuring instrument 100 in each direction (diameter direction) in the anchor hole 501 (for example, four directions in which the positioning member 105 is provided). At this time, the fixed state of the gauge 102 by the fixing tool 101f is released, and the external gauge 102 is moved while being pushed from above so that the lower end 102d of the gauge 102 contacts the hole bottom 501b side.

  By this moving operation, it is possible to know the state in which the gauge 102 protrudes most downward with respect to the holding portion 101, and this state is a state in which the lower end 102d of the gauge 102 is in contact with the hole bottom portion 501b. Then, the fixture 101f is operated to fix and hold the protruding state of the gauge 102.

After the above operation, the perforation measuring instrument 100 is taken out from the anchor hole 501, and the depth D (the boundary position between the wall portion 501a and the inclined portions 501c, 501d) of the anchor hole 501 is seen from the scale 102a of the gauge 102. To the bottom 501b of the hole) can be measured. And the depth is
“Depth D = Total length L1 of gauge 102—Full length L2 of holding portion 101—Length L3 of scale 102a of gauge 102 protruding upward from holding portion 101”
Can be calculated. Based on this depth D, the drilling depth by the drill can be known, and the excess or deficiency of the drilling depth can be eliminated.

  Further, if the scale 102a is configured such that the lower end 102d of the gauge 102 is set to “0” and the scale is engraved toward the top, the perforation measuring instrument 100 is taken out from the anchor hole 501, and if the scale 102a is directly read, the depth of the hole bottom 501b is determined. D can be measured.

  In addition, the state shown in FIG. 3, that is, the holding portion 101 is held and inserted into the anchor hole 501 and the four positioning members 105 are stopped at the boundary between the wall portion 501a and the hole bottom portion 501b. Let's consider the state of letting it go. At this time, since the plurality of positioning members 105 are projected by the biasing member 104 with the same biasing force, the holding portion 101 and the gauge 102 are positioned at the center position of the anchor hole 501.

  At this time, when the gauge 102 is in the state of protruding downward, it can be determined that the hole bottom portion 501b is formed at the center position of the anchor hole 501. Therefore, in the case of other states, that is, when the gauge 102 protrudes most downward when the perforation measuring instrument 100 is moved in the lateral direction inside the anchor hole 501, the center position of the anchor hole 501 is set. It can be determined that the hole bottom portion 501b is formed eccentrically.

  Further, since the amount of protrusion of the gauge 102 in the direction can be known by moving the drilling measuring instrument 100 in the lateral direction within the anchor hole 501, the formation state of the anchor hole 501, that is, the inclined portion 501c of the anchor hole 501 is known. , 501d can be known.

(About combined use of height correction member)
FIG. 4 is a view showing a height correction member attached to the anchor bolt. By measuring the depth and shape of the anchor hole 501 using the above-described drilling measuring instrument 100, the depth of the anchor hole 501 formed using a drill can be made appropriate. The height correction member 400 may be configured based on a single measurement result at 100.

  The height correction member 400 may be placed after the height correction member 400 is fixed to the end portion 601a of the anchor bolt 601 by adhesion or the like. At this time, the height correction member 400 has a width equal to or smaller than the width of the end portion 601a and has a height of the measured depth D. Accordingly, the end (lower end) of the height correction member 400 is in contact with the hole bottom 501b of the anchor hole 501. Therefore, if the height correction member 400 is provided, it is possible to perform an extra driving by the depth D, increase the degree of opening of the expanded portion 602 of the anchor bolt with respect to the anchor hole 501, and perform stable fixing. become.

(Measurement operation to measure by inserting only the gauge without inserting the main body into the anchor hole)
Next, the case where the measurement is performed by inserting only the gauge 102 without inserting the perforation measuring instrument 100 into the anchor hole 501 will be described. In this case, the positioning member 105 protrudes longer than the opening diameter (diameter) of the anchor hole 501. For example, when the opening diameter (diameter) of the anchor hole 501 has a range of 15 to 22 mm, the length between the distal ends 105a and 105a of the pair of positioning members 105 and 105 in the linear direction protrudes with a length exceeding 22 mm. It is configured as follows.

  FIG. 5 is a diagram illustrating another example of an anchor hole measurement state using a perforation measuring instrument. As shown in the figure, the positioning member 105 of the perforation measuring instrument 100 comes into contact with the opening of the anchor hole 501. Thereafter, the gauge 102 is protruded from the holding portion 101, and the lower end 102d of the gauge 102 is brought into contact with the hole bottom portion 501b. Thereby, the depth D0 of the anchor hole 501 (the depth from the opening to the hole bottom 501b) can be measured.

  Even in this measurement state, it cannot be determined from the outside whether the gauge 102 is positioned at the deepest hole bottom 501b of the anchor hole 501. Therefore, after that, the operator only has to move the perforation measuring instrument 100 in the lateral direction (diameter direction) inside the anchor hole 501. As a result, when the gauge 102 protrudes most downward with respect to the holding part 101, it can be seen that the hole bottom 501b is in contact with the lower end 102d of the gauge 102, and the fixture 101f is operated to operate the protruding state of the gauge 102. Can be taken out from the anchor hole 501, and the depth D0 of the anchor hole 501 can be measured by looking at the scale 102a of the gauge 102.

  If the scale 102a is configured such that the lower end 102d of the gauge 102 is set to “0” and the scale is engraved toward the top, the perforation measuring instrument 100 is taken out from the anchor hole 501, and if the scale 102a is read directly, the depth D0 of the anchor hole 501 is obtained. Can be measured.

  As another configuration example of the scale 102 a, when the lower end 102 d of the gauge 102 is positioned at the lower end 101 k of the holding part 101, the scale 102 a of the gauge 102 at the upper end 101 n of the holding part 101 is “0”. It may be engraved with the notation that the numerical value increases in the upper part. Thereby, the protruding amount of the gauge 102 that has advanced from the lower portion of the holding portion 101 to the anchor hole 501 becomes the protruding amount of the gauge 102 remaining on the upper portion of the holding portion 101. Thus, the depth D0 of the anchor hole 501 is read while the gauge 102 of the perforation measuring instrument 100 is still inserted into the anchor hole 501 simply by reading the scale 102a carved on the gauge 102 on the upper part of the holding portion 101. Can do.

  In the above configuration, the scale 102 a of the gauge 102 may not form the scale 102 a that is always hidden inside the holding portion 101. The urging member 104 is not limited to a spring, and a spring or an elastic body such as rubber may be used. Further, the tip 105a portion of the positioning member 105 may be inclined so that it can be easily inserted into the anchor hole 501.

  According to the embodiment described above, the depth and shape of the anchor hole can be measured. The depth is not limited to the entire depth of the anchor hole, and only the depth from the boundary position between the wall surface and the hypotenuse to the bottom of the hole can be measured. This makes it possible to obtain an appropriate depth when forming the anchor hole. Then, after that, the anchor bolt fixed in the anchor hole can be firmly fixed, and the efficiency and reliability of the entire anchor construction can be improved.

  By the way, in the above description, the measurement of the anchor hole has been described as an example. However, the depth and shape of various drill holes can be measured without being limited to the anchor hole.

  As described above, the drilling measuring instrument according to the present invention is useful for measurement for appropriately performing the drilling depth, and particularly when drilling various holes such as anchor holes such as concrete anchors with a drill or the like. Suitable for measurement.

It is a perspective view which shows the perforation measuring instrument by embodiment of this invention. It is a fragmentary sectional view showing the inside of a housing. It is a figure which shows an example of the measurement state of the anchor hole using the drilling measurement instrument. It is a figure which shows the height correction member attached to an anchor bolt. It is a figure which shows the other example of the measurement state of the anchor hole using a drilling measurement instrument. It is sectional drawing which shows an example of the formation state of an anchor hole. It is a figure which shows the insertion state of an anchor bolt. It is a figure which shows the driving | running state of an anchor bolt.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Perforation measuring instrument 101 Holding part 101a Slide hole 101f Fixing tool 102 Gauge 102a Scale 103 Housing 103a Housing hole 103d, 105e Locking piece 104 Energizing member 105 Positioning member 400 Height correction member 501 Anchor hole 501b Hole bottom part 601 Anchor bolt

Claims (2)

A gauge of a predetermined length inserted into the formed hole and having a scale for measuring the depth of the hole;
A hollow holding portion for holding the gauge movably,
A plurality of positioning members provided in the holding portion and having a biasing force protruding in the width direction of the hole in a state of being inserted into the hole;
A perforation measuring instrument comprising:   The plurality of positioning members each include a biasing member that applies a constant biasing force to the holding portion, and the holding portion and the gauge are positioned at the center of the hole in a state where the holding portion is inserted into the hole. The perforation measuring instrument according to claim 1, wherein positioning is performed so that

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