JP2010014413A - Dimension measuring tool - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide dimension measuring tools capable of measuring a dimension between two points of a measuring object easily and accurately, even if an obstruction exists between the two points. <P>SOLUTION: Each dimension measuring tool 10 includes a fixed part 11 to be coaxially fixed by screwing to the threaded part 6a of a bolt 6 protruded from a first L angle 4, a cylindrical shaft 12 provided vertically in the fixed part 11 so as to be coaxial with the threaded part 6a, and erected so that its tip surface becomes higher than a height of a second L angle 5 attached to the first L angle 4, and radial grooves 13 provided in a tip surface of the shaft 12 to lock the claw 8b of a tape measure 8. The fixed part 11 is formed into the shape of a hexagonal nut, and has a tapped hole 11a screwed with the threaded part 6a of the bolt 6. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a dimension measuring jig.

  When replacing a structural member (such as a bolted L-angle material) in an existing structure such as a power transmission tower or the like, if there is no detailed drawing, an actual measurement survey of the structural member is performed on site. In such a case, it is required to accurately measure the position or the like of the bolt hole of the above-described component member (hereinafter, appropriately referred to as a measurement object) with a precision in millimeters using a tape measure or a convex.

  Below, based on FIGS. 5-7, the structural example of the conventional measuring object and the dimension measuring method are demonstrated concretely. FIG. 5 is a plan view showing an object to be measured, FIG. 6 is a side view showing a state of a conventional dimension measurement using a convex, and FIG. 7 is a state of a conventional dimension measurement using an L-shaped ruler and a convex. FIG.

  As shown in FIGS. 5 and 6, for example, a rectangular frame 1 constituting a part of a power transmission tower or the like includes four L-angle members 2, bolts and nuts (both shown in the figure) on corner members 3 arranged at four corners. (Not shown) or the like.

  In addition, the frame body 1 includes a crossed first L-angle member 4 and second L-angle member 5 in a diagonal shape, and is fixed to the four L-angle members 2 by bolts 6 and nuts 7. . Each of the intersecting portions of the first L-angle member 4 and the second L-angle member 5 is provided with a through hole and is fixed by a bolt 6 and a nut 7. The L angle member 2, the first L angle member 4 and the second L angle member 5 are steel members whose vertical cross section in the longitudinal direction is substantially L-shaped.

  There are cases where it is desired to replace the constituent members of such existing structures with new ones. For example, when the first L-angle material 4 is replaced with a new one, when there is no detailed drawing, the first L-angle material 4 is dimensionally measured on site, and a new member having the same dimension is obtained based on the measurement result. It is necessary to make it.

  That is, in order to produce a new member having the same dimensions as the first L-angle member 4, the total length of the first L-angle member 4 is measured and the positions of three through holes through which the bolts 6 are inserted are measured. In particular, it is necessary to accurately measure the distance (distance between the centers of the bolts 6 and 6) L between the through holes located at both ends.

  This measurement operation is usually performed by two operators using the convex 8 or often using the L-shaped ruler 9 and the convex 8 in combination.

  First, a measurement method performed using the convex 8 by two workers will be described with reference to FIG. That is, as shown in FIG. 6, one operator positions the claw portion 8b at the tip of the scale portion 8a with a dimension scale drawn from the convex 8 at the center of the screw portion 6a at one end, and the other operator Then, the distance L is measured by reading a dimension scale corresponding to the center position of the screw portion 6a at the other end.

  At this time, the second L angle material 5 is fixed to the central portion of the first L angle material 4, and the height of the second L angle material 5 with respect to the first L angle material 4 is Since the projecting height of the threaded portion 6a with respect to one L-angle member 4 is higher, if the scale portion 8a of the convex 8 is extended horizontally toward the other threaded portion 6a, it interferes with the second L-angle member 5. To do. Therefore, in order to avoid this interference, the distance L is measured while the scale portion 8a is bypassed above the second L-angle member 5.

  Note that the claw portion 8b of the convex 8 is formed by bending a metal piece so that the cross section is substantially L-shaped. Therefore, if the measurement object has a corner portion, the claw portion 8b is hooked on the corner portion, and stable measurement without positional deviation is possible.

  For this reason, one operator does not place the claw portion 8b at the center of the screw portion 6a at one end as described above, but hooks the claw portion 8b on the outer peripheral edge portion of the screw portion 6a and measures the screw portion from the measured value. It is also possible to measure the interval L by subtracting the radius of 6a.

  Next, based on FIG. 7, the measuring method performed by two workers using the L-shaped ruler 9 and the convex 8 in combination will be described. That is, as shown in FIG. 7, each worker positions the corner portion of the L-shaped ruler 9 at the center of the screw portion 6a so that the vertical piece of the L-shaped ruler 9 extends perpendicularly to the axial direction of the screw portion 6a. To be located. FIG. 7 shows a state in which the vertical piece of the L-shaped ruler 9 does not extend perpendicularly to the axial direction of the screw portion 6a.

  Then, in a state where the posture of the L-shaped ruler 9 is maintained, the worker places the claw portion 8b of the convex 8 on the upper end portion of the vertical piece of the L-shaped ruler 9 positioned on one side, and the other worker However, the distance L is measured by reading the dimension scale corresponding to the upper end portion of the vertical piece of the L-shaped ruler 9 located at the other end.

As a related technique, a measure for working at a high place is known (see, for example, Patent Document 1). In other words, the conventional high-altitude work measure is used when two workers measure the length, dimensions, etc. of a measurement object at a high work site such as a transmission tower or construction site. , Consisting of a long scale band with a scale and a case body that encloses and stores the scale band, and a gripping part is provided at the tip of the scale band, and a zero scale is attached from a position at a predetermined interval between the tips. It is composed.
JP 2007-278947 A

  As described above, the measurement method performed using the convex 8 has the following problems. That is, as shown in FIG. 6, the height of the second L-angle material 5 with respect to the first L-angle material 4 is higher than the protruding height of the screw portion 6 a with respect to the first L-angle material 4. If the scale portion 8a of the convex 8 is extended horizontally toward the other screw portion 6a, it interferes with the second L-angle member 5.

  Therefore, in order to avoid this interference, the distance L is measured while the scale portion 8a is bypassed above the second L-angle member 5. For this reason, the measurement value becomes larger than the true value, and there is a problem that an accurate measurement value cannot be obtained.

  Further, as shown in FIG. 7, when the measurement is performed using the L-shaped ruler 9, the L-shaped ruler 9 corresponds to the threaded portion 6 a of the bolt 6 as indicated by the solid line or the broken line in the drawing. There is a high possibility that the vertical piece of the L-shaped ruler 9 does not extend perpendicularly to the axial direction of the screw portion 6a.

  For this reason, the measured value is smaller than the true value (see the L-shaped ruler 9 shown by a solid line in FIG. 7) or the measured value is larger than the true value (the L-shaped ruler 9 shown by a broken line in FIG. 7). There is a problem that accurate measurement values cannot be obtained.

  Further, even when the conventional high-altitude work measure according to Patent Document 1 is used, the measurement procedure is the same as that when the convex 8 is used, and the first L-angle material 4 is measured at the time of measurement. Since interference with the L-angle material 5 of 2 cannot be avoided, the same problem as described above has been caused.

  In particular, when an existing component such as a power transmission tower is an object to be measured, when replacing a new component manufactured based on the measurement result with an existing component, power transmission is performed for a predetermined time to ensure safety. Measures such as stopping are necessary.

  For this reason, if a new component member is not produced based on an accurate measurement result, the replacement operation with the existing component member cannot be performed. Forced to re-create.

  Furthermore, measures such as stopping power transmission are required again when installing a newly reconstructed component. As described above, it has been required to obtain an accurate measurement value with respect to an existing component member by a single measurement operation.

  In addition, since measurements on power transmission towers and the like are often performed at high places, measurement work can be easily performed even when an obstacle (such as another L-angle material) exists between two points to be measured. It was requested.

  This invention is made in view of the above, Comprising: It is providing the dimension measuring jig which can measure a dimension easily and correctly, even if an obstruction exists between two points of a measuring object. Objective.

  In order to achieve the above-described object, (1) the present invention is a vertically extending portion of the fixing portion that is coaxially fixed to the screw portion of the bolt projecting from the measurement object, and that is coaxial with the screw portion. And a shaft portion erected so that the tip surface is higher than the height of other components attached to the object to be measured, and the tape measure provided on the tip surface of the shaft portion. And a groove portion for locking the claw portion serving as the base end of the scale.

  (2) In the invention of (1), it is preferable that a plurality of the groove portions are provided radially through the center of the shaft portion.

  (3) In the invention described in (1) or (2), it is preferable that the fixing portion is formed in a hexagonal nut shape and has a screw hole that is screwed into a screw portion of the bolt.

  According to the present invention, it is possible to provide a dimension measuring jig capable of easily and accurately measuring a dimension even when an obstacle exists between two points to be measured.

  Embodiments of the present invention will be described below in detail with reference to the drawings. In addition, this invention is not limited by this embodiment.

  FIG. 1 is a side view showing a state of dimension measurement using the dimension measuring jig according to the present embodiment, FIG. 2 is a perspective view showing the dimension measuring jig, and FIG. 3 is a side view showing the dimension measuring jig. FIG. 4 is a plan view showing the dimension measuring jig.

  As shown in FIGS. 1 to 4, the dimension measuring jig 10 includes a fixing portion 11 that is coaxially screwed and fixed to a screw portion 6 a of a bolt 6 protruding from the first L-angle material 4 (measurement object). And the second L-angle material 5 (other component member) that is suspended from the fixed portion 11 so as to be coaxial with the screw portion 6a and whose tip surface is attached to the first L-angle material 4. A columnar shaft portion 12 erected so as to be higher than the height, and a groove portion that is provided on the distal end surface of the shaft portion 12 and engages a claw portion 8b that is a base end of a dimensional scale of the convex (measurement tape) 8 13.

  2 to 4, the fixing portion 11 is formed in a hexagonal nut shape having the same dimensions as the head of the bolt 6 and the nut 7, and is screwed into the screw portion 6a of the bolt 6 (see FIG. 3). See).

  The first L-angle member 4 that is the object to be measured is fixed by the L-angle member 2, the bolt 6 and the nut 7. Usually, the tip of the screw portion 6a of the bolt 6 (the number of threads of the effective screw portion). Projecting from the first L-angle member 4. The dimension measuring jig 10 is configured such that the protruding screw portion 6a is screwed into the screw hole 11a of the fixing portion 11 so that it can be vertically and accurately mounted on the first L-angle material 4. is there.

  Further, the outer diameter of the fixing portion 11 is formed to be the same size as the head of the bolt 6 and the nut 7 so that a tool (such as a hexagon spanner) used for the bolt 6 and the nut 7 can also be used. is there.

  As shown in FIGS. 2 and 3, the shaft portion 12 is integrally suspended from the fixed portion 11. Further, the shaft portion 12 is formed to have substantially the same diameter as the screw portion 6 a of the bolt 6. Further, the front end surface (upper end surface) of the shaft portion 12 is a flat surface and is parallel to the bottom surface of the fixed portion 11. M16, M22, M24, etc. are often used as the diameter of the threaded portion 6a of the bolt 6.

  As shown in FIGS. 2 to 4, six groove portions 13 are provided radially through the center of the shaft portion 12. For example, a total of six groove portions 13 are provided at positions where the diameter of the shaft portion 12 is shifted by 30 degrees.

  That is, the dimension measuring jig 10 is configured such that when the claw portion 8b of the convex 8 is locked (hooked) to the groove portion 13 during measurement, six directions can be selected according to the direction in which the scale portion 8a is extended. Has been.

  Moreover, it is preferable that the width | variety of the groove part 13 is a grade which the nail | claw part 8b of the convex 8 fits with some play. The depth dimension of the groove 13 is preferably slightly larger than the protruding distance of the claw 8b of the convex 8.

  The dimension measuring jig 10 configured as described above may be made of metal or synthetic resin as long as a predetermined strength is ensured, and may be other materials. In the case where the object to be measured is a component of a power transmission tower, it is preferable that the dimension measuring jig 10 is made of a synthetic resin that is advantageous for weight reduction in view of the fact that the dimension measuring operation is performed at a high place.

  Next, a method for measuring the interval L in the first L-angle member 4 using the dimension measuring jig 10 will be described with reference to FIG.

  As described above, the original purpose is to accurately measure the distance L between the centers of the through holes of the first L-angle member 4 inserted through the screw portions 6a, 6a. Since the dimension measuring jig 10 is configured as described above, the distance between the centers of the shaft portions 12 and 12 is equal to the distance L between the centers of the screw portions 6a and 6a. Therefore, the said objective can be achieved by measuring the space | interval L between the centers of the axial parts 12 and 12. FIG.

  Therefore, first, the operator engages the two dimension measuring jigs by screwing the screw holes 11a of the fixing portion 11 to the tip portions of the two screw portions 6a protruding from both ends of the first L-angle member 4. The tool 10 is suspended from the first L-angle member 4.

  In order to increase the measurement accuracy, it is necessary to suspend the two dimension measurement jigs 10 with the same height. This can be easily realized by making the number of times of screwing the same when the fixing portions 11 of the two dimension measuring jigs 10 are screwed to the tip portions of the respective screw portions 6a.

  Next, the operator selects one that is orthogonal to the longitudinal direction of the first L-angle member 4 from the six groove portions 13 provided in the one dimension measuring jig 10 that is suspended. , Hook the claw 8b of the convex 8.

  Then, the scale portion 8 a of the convex 8 is extended toward the other dimension measuring jig 10 that is suspended, and the dimension scale of the scale section 8 a that is located at the center of the shaft portion 12 of the dimension measuring jig 10 is obtained. read. This measured value is the distance L between the centers of the through holes of the first L-angle member 4.

  At this time, the height of the tip surfaces (upper end surfaces) of the shaft portions 12 and 12 suspended from both ends of the first L-angle member 4 exceeds the height of the second L-angle member 5. The scale portion 8a and the second L-angle member 5 do not interfere with each other as in the prior art (see FIG. 6).

  Therefore, the operator can extend the scale portion 8a straight and horizontally between the dimension measuring jigs 10 and 10, and can accurately measure the scale portion 8a. Further, for the same reason, the L-shaped ruler 9 (see FIG. 7) that has been conventionally used for measurement becomes unnecessary.

  Moreover, since the claw part 8b of the convex 8 can be hooked on the groove part 13 of one dimension measuring jig 10, the operation of extending the scale part 8a of the convex 8 toward the other dimension measuring jig 10 is also easily performed. be able to. Therefore, if the distance L is about several meters, the worker can perform the measurement work alone.

  In addition, by using the dimension measuring jig 10 in the above manner, the position of the through hole for the bolt 6 opened at the intersection of the first L angle material 4 and the second L angle material 5 can be easily and accurately. Can be measured.

  As described above, according to the dimension measuring jig 10 according to this embodiment, the dimension can be easily and accurately measured even when an obstacle exists between two points to be measured.

  That is, the dimension measuring jig 10 can be easily screwed and fixed to the screw portion 6 a and can be set up vertically with respect to the first L-angle material 4. Then, by hooking the claw portion 8 b of the convex 8 to the groove portion 13, it can be easily positioned at the center of the shaft portion 12. In particular, in a power transmission tower, measurement work at a high place is required, so that the measurement work can be easily performed is very effective.

  In addition, since the second L-angle member 5 is not interfered with when the distance L is measured, the scale portion 8a can be extended straight and horizontally between the dimension measuring jigs 10 and 10, and the measurement can be performed accurately.

  Moreover, since the groove part 13 of the dimension measuring jig 10 is provided in a total of six at positions where the diameter of the shaft part 12 is shifted by 30 degrees, the claw part 8b of the convex 8 is locked to the groove part 13 during measurement ( 6 directions can be selected according to the direction in which the scale portion 8a is extended.

  Therefore, the operator can screw the fixing portion 11 into the screw portion 6a without worrying about the direction of the groove portion 13, and selects the groove portion 13 in an appropriate direction after the screwing is completed. Since it is sufficient to hook the eight claw portions 8b, workability is extremely good.

  In addition, in the said embodiment, although demonstrated as what integrally provides the axial part 12 in the fixing | fixed part 11, it is not limited to this, For example, the axial part 12 which has the screw part in the base end part is used as the fixing | fixed part 11. You may comprise so that the dimension measurement jig | tool 10 may be assembled by screwing in the screw hole provided in the upper surface side.

  Moreover, in the said embodiment, although demonstrated as what forms the fixing | fixed part 11 so that it can be screwed and fixed to the screw part 6a, if it can fix coaxially with the screw part 6a, it will not be limited to screwing.

  For example, instead of the screw hole 11a provided in the fixing part 11, a circular hole slightly larger than the diameter of the screw part 6a is provided, and the screw part 6a is fitted into the circular hole, whereby the fixing part 11 is screwed into the screw part 6a. It may be fixed to. In this case, it is preferable to provide a separate temporary fixing means or the like so that the fixing portion 11 does not rotate idle during measurement with the fixing portion 11 fitted.

  Moreover, in order to contribute to the weight reduction of the dimension measurement jig | tool 10, the axial part 12 is good also as a hollow structure not solid.

  Moreover, in the said embodiment, although the groove part 13 was demonstrated as providing six in the axial part 12, it is not limited to this, It can increase / decrease suitably.

  In addition, the dimension measuring jig 10 can be similarly applied not only to a measuring object made of an L-angle material but also to a steel pipe material or the like, and expects the same effect as described above. Can do.

It is a side view which shows the mode of the dimension measurement using the dimension measurement jig | tool which concerns on this embodiment. It is a perspective view which shows a dimension measurement jig | tool. It is a side view which shows a dimension measurement jig | tool. It is a top view which shows a dimension measurement jig | tool. It is a top view which shows a measuring object. It is a side view which shows the mode of the conventional dimension measurement using a convex. It is a side view which shows the mode of the conventional dimension measurement using an L-shaped ruler and a convex.

Explanation of symbols

4 First L-angle material (measurement object)
5 Second L-angle material (other components)
6 Bolt 6a Screw part 8 Convex
8a Scale part (dimension scale)
8b Claw part 10 Dimension measurement jig 11 Fixing part 11a Screw hole 12 Shaft part 13 Groove part

Claims (3)

A fixed part that is coaxially fixed to the threaded part of the bolt protruding from the measurement object;
A shaft portion erected on the fixed portion so as to be coaxial with the screw portion, and a shaft portion erected so that a tip end surface thereof is higher than a height of another component attached to the measurement object; ,
A groove portion that is provided on the distal end surface of the shaft portion and that locks a claw portion that is a base end of a dimensional scale of the tape measure; and
A dimension measuring jig characterized by comprising:   The dimension measuring jig according to claim 1, wherein a plurality of the groove portions are provided radially through the center of the shaft portion.   The dimension measuring jig according to claim 1, wherein the fixing portion is formed in a hexagonal nut shape and has a screw hole that engages with a screw portion of the bolt.

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