Tape measure fixture for steel tower installation inspection

Abstract

To provide a tape measure fixture for steel tower installation inspection capable of easily ensuring necessary measurement accuracy even when a basic steel material for supporting leg parts of a steel tower is installed on an inclination surface, in addition to improving accuracy of measuring a predetermined distance and work efficiency, in steel tower installation inspection.SOLUTION: A tape measure fixture 1 comprises: an axial rod 2 arranged along a longitudinal direction of a basic steel material; fixing members 3, 4 that fix the axial rod 2 to the basic steel material; a locking part 6 that is provided at the beginning end of a tape measure, and locks the beginning end into a locking region of the axial rod 2; and a fastening member 5 arranged above the locking part 6, and detachably attached to the first screw part.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a measuring tape fixture for fixing the starting end of a measuring tape to a structure, and particularly to a measuring tape fixture for fixing the starting end of a measuring tape used in tower installation inspection to a predetermined position of a foundation steel material.

Background Art

[0002] Conventionally, when installing foundation steel materials during tower construction, a predetermined distance has been measured with a measuring tape for the foundation steel materials that support the four legs of the tower. First, these distances will be described with reference to FIG. 7. FIG. 7 is an explanatory diagram of the distances measured in tower installation inspection. As shown in FIG. 7, when installing the foundation steel materials of a tower having a center 50, four foundation steel materials 51 to 54 are respectively erected in the openings 55a of four liner plates 55 embedded in the ground G. After that, a tower installation inspection is carried out to check whether the installation positions of the foundation steel materials 51 to 54 match the design positions. This tower installation inspection is performed by measuring the predetermined distance between the apexes 51b to 54b formed on the foundation steel materials 51 to 54. Note that the foundation steel material 51 is L-shaped, and the outer peripheral surfaces 51a, 51a intersect at an angle of approximately 90 degrees with each other, and an outer corner portion 51K having an apex 51b is formed. The foundation steel materials 52 to 54 are also L-shaped like the foundation steel material 51, and outer peripheral surfaces 52a to 54a on two sides and outer corner portions 52K to  54K having apexes 52b to 54b are respectively formed.

[0003] The above-mentioned predetermined distances are the opposite side oblique distances D1 from apex 51b to apex 52b, the opposite side oblique distance D2 from apex 52b to apex 53b, the opposite side oblique distance D3 from apex 53b to apex 54b, the opposite side oblique distance D4 from apex 54b to apex 51b, the diagonal oblique distance D5 from apex 51b to apex 53b, and the diagonal oblique distance D6 from apex 52b to apex 54b. Therefore, after aligning the starting end (scale value is zero) of the measuring tape with any of the apexes 51b to 54b, the scale value of the measuring tape corresponding to the apexes 51b to 54b that match the opposite side oblique distances D1 to D4 and the diagonal oblique distances D5, D6 is read as each measured value.

[0004] However, the base steel materials 51 to 54 are arranged substantially at the center of the opening 55a of the liner plate 55, and the opposite-side diagonal distances D1 to D4 and the diagonal diagonal distances D5 and D6 are usually lengths that cannot be measured by a single operator. Therefore, for the measurement work, one operator holds the starting end of the measuring tape so as not to move it, and the other operator reads the scale value while pulling the measuring tape in a state where it is not bent. However, in such a measurement method, there is a risk that the position of the starting end of the measuring tape will shift by pulling the measuring tape. In this case, there is a problem that the opposite-side diagonal distances D1 to D4 and the diagonal diagonal distances D5 and D6 cannot be measured accurately.

[0005] In addition, since the two operators wear fall prevention devices and perform the measurement while paying sufficient attention not to fall into the opening 55a of the liner plate 55, the burden and time required for the work become large. Therefore, in the conventional tower installation inspection, in addition to requiring two operators, there is also a problem that the work efficiency is not good because the burden on the work is large. Therefore, in recent years, technologies for improving the measurement accuracy of a predetermined distance and work efficiency have been developed, and inventions related thereto have already been disclosed.

[0006] Patent Document 1 discloses an invention related to an end attachment tool for a measuring tape that can improve the construction accuracy level at a construction site and can be measured by one person under the name of "end attachment tool for a measuring tape". The invention disclosed in Patent Document 1 includes a main body portion that is detachably attached to a temporary form for placing concrete, an attachment portion for the starting end of the measuring tape, and is movable with respect to the main body portion and can be fixed at the moving position. It is characterized by comprising an adjustment member capable of positioning the attachment portion corresponding to a reference position indicated by a water line above the temporary form. In the invention having the above configuration, the leading end portion of the measuring tape can be accurately and easily attached to the reference position. In addition, the measuring tape with the leading end portion attached can be fully stretched by the measurer at other measurement target positions, and the dimensions between the measurement target positions can be accurately and easily measured by one measurer.

Prior Art Documents

Patent Documents

[0007]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0008] However, in the invention disclosed in Patent Document 1, when attaching and detaching the main body portion to / from a temporary frame or the like, adjustment is required to slide a total of six tightening rods, so there is a possibility that the attachment and detachment operation will be time-consuming. In addition, considering applying the invention disclosed in Patent Document 1 to distance measurement with a foundation steel material that supports the leg portion of a steel tower, there is a possibility that the required measurement accuracy cannot be easily ensured. This is because the foundation steel material is often installed on an inclined surface inclined with respect to the horizontal direction (that is, the upper edge of the foundation steel material is inclined with respect to the horizontal direction). Assuming that the upper surface of a temporary frame or the like is such an inclined surface, if the adjustment of the tightening rod is not performed more accurately, it is considered that the main body portion cannot be mounted parallel to the upper surface of the temporary frame or the like, or the main body portion may fall off from the temporary frame or the like. In addition, since the attachment portion for locking the leading end portion of the measuring tape is a split groove opened upward, if the main body portion is inclined, it is considered that the leading end portion is likely to come off from the attachment portion. In this case, not only is it necessary to repeat the measurement, but there is also a possibility that the measurement becomes impossible.

[0009] The present invention has been made to address such conventional circumstances, and in tower installation inspection, in addition to improving the measurement accuracy at a predetermined distance and work efficiency, even when the foundation steel material supporting the legs of the tower is installed on an inclined surface, it is an object of the present invention to provide a tape measure fixing tool for tower installation inspection that can easily ensure the required measurement accuracy.

Means for Solving the Problems

[0010] To achieve the above object, a first invention is a tape measure fixing tool for tower installation inspection that fixes the starting end of a tape measure used in tower installation inspection to the foundation steel material that supports the legs of the tower, and includes a shaft rod arranged along the longitudinal direction of the foundation steel material, a fixing member that fixes the shaft rod to the foundation steel material, and a locking portion provided at the starting end of the tape measure that locks this starting end to the upper end of the shaft rod. In the invention having such a configuration, the shaft rod may be a cylinder, a prism, or may have an L-shaped cross section, and its material may be a magnetic body that can adsorb a magnet or a non-magnetic body. Also, as the fixing member, a magnet that adsorbs the shaft rod to the foundation steel material, a shaft rod mounted along the longitudinal direction of the foundation steel material, and a belt-like member that winds the shaft rod and the foundation steel material together can be considered. Further, as the locking portion provided at the starting end of the tape measure, an annular member that locks to the upper end of the shaft rod, or when the shaft rod is a magnetic body, a magnet that adsorbs to the upper end of the shaft rod can be considered.

[0011] In the invention having the above configuration, when the locking portion is locked to the upper end of the shaft rod, the distance between a specific point of the locking portion and a specific point of the foundation steel material (for example, the vertex of the outer corner portion existing on the outer peripheral surface of the foundation steel material) is invariant. Also, the distance between a specific point of the locking portion and the zero point where the scale value of the tape measure becomes zero is invariant. Therefore, when the locking portion is locked to the upper end of the shaft rod, if the zero point of the tape measure coincides with the vertex of one outer corner portion, the scale value of the tape measure that coincides with the vertex of the other outer corner portion becomes the opposite side diagonal distance or the diagonal diagonal distance. Note that since the distance between a specific point of the locking portion and the zero point of the tape measure is invariant, the zero point may be set anywhere on the locking portion or the tape measure.

[0012] Further, in the invention having the above configuration, even when the other end of the measuring tape is pulled during measurement, since the starting end is locked to the upper end of the shaft rod via the locking portion, the position of the zero point of the measuring tape is prevented from shifting.

[0013] A second invention is the first invention, wherein the base steel material is square with an outer corner on its outer peripheral surface, the shaft rod has a notch formed by cutting its outer peripheral surface along the longitudinal direction of the shaft rod, and the notch is characterized in that an inner corner portion that can be arranged to coincide with the outer corner portion is formed. In the invention having such a configuration, in addition to the action of the first invention, by arranging the inner corner portion of the notch to coincide with the vertex of one outer corner portion of the base steel material, for example, in the case of a configuration where the vertex of the inner corner portion of the notch coincides with the zero point of the measuring tape, the scale value of the measuring tape that coincides with the vertex of the other outer corner portion becomes the opposite side diagonal distance or the diagonal diagonal distance. Further, since the notch is formed with an inner corner portion that can be arranged to coincide with the outer corner portion, the state where the shaft rod is in close contact with the base steel material is maintained regardless of the inclination of the base steel material with respect to the vertical direction.

[0014] A third invention is the second invention, wherein the fixing member is provided on the peripheral surface of the notch and is at least one of a magnet that adsorbs to the outer peripheral surface of the base steel material, the shaft rod, and a belt-like body wound around the base steel material. In the invention having such a configuration, in addition to the action of the second invention, the shaft rod is fixed to the base steel material by a magnet on its outer peripheral surface, and the shaft rod is fixed in a state of being bundled with the base steel material by the belt-like body. The material of the belt-like body is a flexible metal or synthetic resin. Therefore, by the fixing member, even when the other end of the measuring tape is pulled during measurement, the state where the shaft rod is in close contact with the base steel material is maintained more firmly.

[0015] A fourth invention is the third invention, wherein an insertion hole through which the belt-like body is inserted is provided penetrating along the short side direction of the shaft rod. In the invention with such a configuration, in addition to the operation of the third invention, since the strip is inserted into the insertion hole in the middle thereof and wound around the shaft rod and the base steel material, the strip is prevented from shifting up and down along the longitudinal direction of the shaft rod. Note that the number of insertion holes per shaft rod may be one or more and does not necessarily match the number of strips.

[0016] The fifth invention is characterized in that, in the first or second invention, a fastening member is provided above the locking portion locked to the upper end of the shaft rod and is detachably attached to the upper end of the shaft rod. The shaft rod is provided with a first threaded portion at the upper end, and the fastening member is provided with a second threaded portion that engages with the first threaded portion. In the invention with such a configuration, the fastening member may be annular or box-shaped with a recess. When the fastening member is annular, the second threaded portion is formed on the inner peripheral surface of the fastening member. When the fastening member is box-shaped, the second threaded portion is formed on the peripheral surface of the recess.

[0017] In the invention with the above configuration, in addition to the operation of the first or second invention, above the locking portion locked to the upper end of the shaft rod, by screwing the second threaded portion of the fastening member with the first threaded portion, the locking portion is prevented from coming off from the upper end of the shaft rod.

Effect of the Invention

[0018] According to the first invention, by providing the shaft rod and the locking portion that locks to the upper end of the shaft rod, even when pulling the other end of the measuring tape during measurement, the position of the zero point of the measuring tape is prevented from shifting. Therefore, the opposite side diagonal distance and the diagonal diagonal distance can be accurately measured. In addition, since the scale value can be read while the measuring tape is being pulled by only one operator, the working efficiency is good.

[0019] According to the second invention, in addition to the operation of the first invention, by arranging the inner corner part of the notch to coincide with one outer corner part of the base steel material, for example, in the case where the vertex of the inner corner part of the notch coincides with the zero point of the tape measure, the zero point of the tape measure can be easily positioned. Further, in this case, since the scale value of the tape measure that coincides with the vertex of the other outer corner part becomes the opposite side diagonal distance or the diagonal diagonal distance, these diagonal distances can be easily read.

[0020] According to the third invention, in addition to the operation of the second invention, since the state where the shaft rod is in close contact with the base steel material is more firmly maintained by the magnet and at least one of the belt-like bodies, for example, even when measuring the opposite side diagonal distance or the diagonal diagonal distance corresponding to the other outer corner part multiple times while arranging the shaft rod at one outer corner part, it is possible to prevent the zero point of the tape measure from shifting each time a measurement is taken. Therefore, according to the third invention, the working time can be shortened and the measurement accuracy can also be improved.

[0021] According to the fourth invention, in addition to the operation of the third invention, since the belt-like body is inserted into the insertion hole, the belt-like body does not shift up and down along the longitudinal direction of the shaft rod, so the posture of the shaft rod and the position with respect to the base steel material can be stably maintained.

[0022] According to the fifth invention, in addition to the operation of the first or second invention, by screwing the second screw part of the fastening member with the first screw part, the locking part is prevented from coming off from the upper end of the shaft rod. Therefore, even if the base steel material and the shaft rod are inclined with respect to the vertical direction, the locking part does not come off from the upper end of the shaft rod. Thus, there is no need to re-measure, and the measurement can be completed smoothly.

Brief Description of the Drawings

[0023]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Mode for Carrying Out the Invention

Embodiment

[0024] The tape measure fixture for tower installation inspection according to the embodiment of the present invention will be described in detail with reference to Figs. 1 to 6. Fig. 1 is a plan view showing the configuration of the tape measure fixture for tower installation inspection according to the embodiment. For the components shown in Fig. 7, the same reference numerals are given in Fig. 1, and the description thereof is omitted. As shown in Fig. 1, the tape measure fixture 1 for tower installation inspection according to the embodiment (hereinafter referred to as the tape measure fixture 1) is for fixing the starting end of the tape measure used in the tower installation inspection to the foundation steel materials 51 to 54 (see Fig. 7) that support the legs of the tower. This tape measure fixture 1 includes a shaft rod 2, two fixing members 3, two fixing members 4, a fastening member 5, and a locking portion 6. Among these, first, the configuration of the fixing member 4 will be described. The fixing member 4 is a belt-like body wound around the shaft rod 2 and the foundation steel materials 51 to 54 in order to fix the shaft rod 2 to the foundation steel materials 51 to 54. Specifically, this fixing member 4 is a flexible stainless steel band, and its ends 4a, 4a are connected or separated at desired locations by a buckle 4b (see Figs. 5(d) and 5(f)).

[0025] Next, the configuration of the shaft rod 2 will be described with reference to FIGS. 2 and 3(a). FIG. 2(a) is a plan view of the shaft rod constituting the tape fixing tool for tower installation inspection according to the embodiment, and FIG. 2(b) is a view taken in the direction of arrow A in FIG. 2(a). FIG. 3(a) is a cross-sectional view taken in the direction of B-B in FIG. 1(a). For the components shown in FIGS. 1 and 7, the same reference numerals are given in FIGS. 2 and 3(a), and the description thereof will be omitted. As shown in FIGS. 2(a) and 2(b), the shaft rod 2 is a non-magnetic metal rod having a substantially cylindrical shape, and is arranged along the longitudinal direction of the base steel materials 51 to 54 (see FIG. 7). The shaft rod 2 has a first screw portion 7 at its upper end 2a, and a notch portion 8 from the lower end 2b to the vicinity of the lower edge of the first screw portion 7. Further, between the lower edge of the first screw portion 7 and the notch portion 8, there is provided a cylindrical locking region 9 where the locking portion 6 is locked.

[0026] The notch portion 8 is formed by cutting the outer peripheral surface 2c of the shaft rod 2 along its longitudinal direction (Y direction). The notch portion 8 includes opposing peripheral surfaces 8a, 8a and an inner corner portion 8b that is the intersection of the peripheral surfaces 8a, 8a. Since the angles of the outer corner portions 51K to 54K of the base steel materials 51 to 54 are all approximately 90 degrees, as shown in FIG. 3(a), the peripheral surfaces 8a, 8a are inclined at approximately 90 degrees to each other. Therefore, the peripheral surfaces 8a, 8a can be in close contact with the outer peripheral surfaces 51a to 54a of the base steel materials 51 to 54. And the inner corner portion 8b can be arranged to coincide with the vertices 51b to 54b of the outer corner portions 51K to 54K.

[0027] Furthermore, fixing members 3, 3 for fixing the shaft rod 2 to the base steel materials 51 to 54 are respectively provided on a part of the peripheral surfaces 8a, 8a of the notch portion 8. Specifically, the fixing members 3, 3 are long plate-shaped magnets that adsorb to the outer peripheral surfaces 51a to 54a of the base steel materials 51 to 54, and are respectively embedded in the peripheral surfaces 8a, 8a so as to be flush with the peripheral surfaces 8a, 8a.

[0028] The shaft rod 2 is provided with insertion holes 2d, 2d through which the stainless steel bands, which are the fixing members 4, 4, pass along the short side direction (X direction) of the shaft rod 2. Among these, the upper insertion hole 2d is formed near the first screw portion 7, and the lower insertion hole 2d is formed near the lower end 2b.

[0029] Next, the fastening member will be described with reference to FIG. 3(b). FIG. 3(b) is a side view of the fastening member that constitutes the tape measure fixing tool for tower installation inspection according to the embodiment. Regarding the components shown in FIGS. 1, 2, 3(a), and 7, the same reference numerals are given in FIG. 3(b) as well, and the description thereof is omitted. The fastening member 5 is disposed above the locking portion 6 that is locked to the upper end 2a of the shaft rod 2, and is a member that is attached to and detached from the upper end 2a of the shaft rod 2 (see FIG. 1). Specifically, as shown in FIG. 3(b), the fastening member 5 is annular and includes a second screw portion 10 that engages with the first screw portion 7 of the shaft rod 2 on its inner peripheral surface. Also, the outer peripheral surface 5a of the fastening member 5 is semi-circular in side view. This is to prevent the outer peripheral surface 5a from interfering with the peripheral surface 6c of the annular member 6a (see FIG. 4).

[0030] Subsequently, the locking portion will be described with reference to FIG. 4. FIG. 4(a) is a plan view of the locking portion that constitutes the tape measure fixing tool for tower installation inspection according to the embodiment, and FIG. 4(b) is a side view showing the usage state of the locking portion. Regarding the components shown in FIGS. 1 to 3, and 7, the same reference numerals are given in FIG. 4 as well, and the description thereof is omitted. The locking portion 6 is provided at the start end 60a of the tape measure 60, and is a member that locks the start end 60a to the upper end 2a of the shaft rod 2. Specifically, as shown in FIG. 4(a), the locking portion 6 includes an annular member 6a in the shape of a ring and an attachment member 6b formed integrally with the annular member 6a. This attachment member 6b sandwiches and fixes the start end 60a. Also, the zero point at which the scale value of the tape measure 60 becomes zero is the center point C6 of the annular member 6a. Therefore, the scale value of the tape measure 60 at the position where it contacts the attachment member 6b is d. Specifically, d is 3 cm.

[0031] Also, as shown in Fig. 4(b), the annular member 6a has a circular peripheral surface 6c in a longitudinal section orthogonal to its diameter direction. This is to prevent interference between the peripheral surface 6c and the outer peripheral surface 5a of the fastening member 5, and also to prevent interference between the peripheral surface 6c and the outer peripheral surface of the locking region 9.

[0032] Therefore, after the annular member 6a of the locking portion 6 is fitted into the locking region 9 of the shaft rod 2, the second screw portion 10 of the fastening member 5 is screwed onto the first screw portion 7 of the shaft rod 2 above this annular member 6a, thereby preventing the locking portion 6 from coming off the first screw portion 7. Note that the inner diameter of the annular member 6a is configured to be larger than the diameter of the locking region 9 to such an extent that it does not rub against the outer peripheral surface of the locking region 9, and the thickness of the annular member 6a is smaller than the height along the Y direction of the locking region 9. This is for accurately measuring the opposite-side oblique distances D1 to D4 and the diagonal oblique distances D5 and D6 even when the base steel materials 51 to 54 are erected on inclined surfaces inclined with respect to the horizontal direction.

[0033] Also, the center point C6 of the annular member 6a substantially coincides with a virtual straight line obtained by extending the inner corner portion 8b of the notch 8 in the direction of the first screw portion 7. Note that the inner corner portion 8b is arranged to coincide with the vertices 51b to 54b of the outer corner portions 51K to 54K, and the opposite-side oblique distances D1 to D4 and the diagonal oblique distances D5 and D6 are the distances between the vertices 51b to 54b. Therefore, the reading values of the tape measure 60 from the center point C6 of the annular member 6a directly become the opposite-side oblique distances D1 to D4 and the diagonal oblique distances D5 and D6.

[0034] Next, the procedure for using the tape measure fixture will be described with reference to Fig. 5. Figs. 5(a) to 5(f) are external views for explaining the procedure for using the tape measure fixture for tower installation inspection according to the embodiment. Among these, Figs. 5(a), 5(c), and 5(e) are side views when the shaft rod is arranged along the base steel material, and Figs. 5(b), 5(d), and 5(f) are enlarged views in the direction of arrow C of the tape measure fixture for tower installation inspection corresponding to Figs. 5(a), 5(c), and 5(e), respectively. Note that the components shown in Figs. 1 to 4 and Fig. 7 are given the same reference numerals in Fig. 5, and their descriptions are omitted.

[0035] As shown in Figs. 5(a) and 5(b), as the first procedure for using the tape measure fixture 1, an operator (not shown) attaches the shaft rod 2 such that the notch 8 is along the outer corner 51K of the base steel material 51. At this time, the shaft rod 2 is attached at a height position where the locking region 9 slightly exceeds the upper edge 51c of the base steel material 51. Further, since the notch 8 is formed with an inner corner 8b that can be arranged to coincide with the outer corner 51K, the state where the shaft rod 2 is in close contact with the outer corner 51K is maintained regardless of the inclination angle of the base steel material 51 with respect to the vertical direction. Furthermore, as shown in Fig. 5(b), the inner corner 8b of the notch 8 coincides with the vertex 51b of the outer corner 51K.

[0036] The second procedure is that, as shown in Fig. 5(c), the operator inserts the fixing members 4, 4 into the two insertion holes 2d, 2d and winds them around the shaft rod 2 and the periphery of the base steel material 51, respectively. Also, as shown in Fig. 5(d), the wound fixing member 4 is tightened and fixed by the buckle 4b.

[0037] Then, the third procedure is that, as shown in Fig. 5(e), the operator locks the annular member 6a of the locking portion 6 to the locking region 9 of the shaft rod 2. After that, the fastening member 5 is screwed into the first screw portion 7. Thereby, the annular member 6a is held so as not to come off from the first screw portion 7. Further, as shown in Fig. 5(f), the center point C6 of the annular member 6a, which is the zero point of the tape measure 60, coincides with the apex 51b of the base steel material 51 and the inner corner 8b of the notch 8. In addition, when attaching the shaft rod 2 to the base steel materials 52 to 54, the above first to third procedures are also followed.

[0038] Furthermore, a method for measuring the target distance using the tape measure fixture will be described with reference to Fig. 6. Figs. 6(a) and 6(b) are a plan view and a side view, respectively, for explaining the measuring method using the tape measure fixture for tower installation inspection according to the embodiment. Note that the components shown in Figs. 1 to 5 and Fig. 7 are given the same reference numerals in Fig. 6, and the description thereof is omitted. A method for measuring the diagonal oblique distance D5 using the tape measure fixture 1 will be described. As shown in Figs. 6(a) and 6(b), to measure the diagonal oblique distance D5, after the operator locks the locking portion 6 to the locking region 9 (see Fig. 2) of the shaft rod 2 fixed to the base steel material 51 so as not to come off, according to the procedure described with reference to Fig. 5, while holding the other end 60b of the tape measure 60, the operator moves to the side of the base steel material 53 and reads the scale value of the other end 60b that coincides with the apex 53b. This read scale value is the diagonal oblique distance D5.

[0039] Here, since the locking portion 6 includes the annular member 6a and the inner diameter of this annular member 6a is larger than the diameter of the locking region 9, as shown in Fig. 6(a), the tape measure 60 can rotate in the Z1 and Z2 directions indicated by the arrows around the center point C6 (see Fig. 4(a)) of the annular member 6a. Also, as shown in Fig. 6(b), the base steel material 51 and the base steel material 53 are erected on the ground G inclined with respect to the horizontal direction. However, as described above, the inner diameter of the annular member 6a is configured to be larger than the diameter of the locking region 9, and the thickness of the annular member 6a is configured to be smaller than the height along the Y direction of the locking region 9. Therefore, the annular member 6a fitted into the locking region 9 can be inclined, and even when the inclination of the ground G is large, the tape measure 60 can be inclined to be equivalent to this inclination.

[0040] Next, to measure the opposite side diagonal distance D1, as shown in Fig. 6(a), while the locking part 6 is locked in the locking area 9, the operator rotates the tape measure 60 in the Z1 direction and reads the scale value of the other end 60b that coincides with the vertex 52b of the base steel material 52. After that, to measure the opposite side diagonal distance D4, while the locking part 6 is locked in the locking area 9, the operator rotates the tape measure 60 in the Z2 direction and reads the scale value of the other end 60b that coincides with the vertex 54b of the base steel material 54. Although not shown in the figure, after the operator moves the shaft rod 2 and the locking part 6 to the base steel material 52, the operator measures the diagonal distance D6 and the opposite side diagonal distance D2. Further, after the operator moves the shaft rod 2 and the locking part 6 to the base steel material 53, the operator measures the opposite side diagonal distance D3. Note that the above measurement method is an example, and the measurement order of the opposite side diagonal distances D1 to D4 and the diagonal distances D5 and D6 is not particularly limited.

[0041] In the tape measure fixture 1 with the above configuration, when measuring the opposite side diagonal distances D1 to D4 and the diagonal distances D5 and D6, even if the operator pulls the other end 60b of the tape measure 60, the starting end 60a is locked in the locking area 9 of the shaft rod 2 via the locking part 6, so that the position of the zero point (the center point C6 of the annular member 6a) of the tape measure 60 is prevented from shifting.

[0042] Also, in the tape measure fixture 1, as shown in Figs. 5(a) and 5(b), after the shaft rod 2 is attached to the base steel materials 51 to 54 in the first procedure, since the shaft rod 2 is adsorbed to the outer corner parts 51K to 54K via the fixing members 3, 3 which are magnets, displacement or dropping of the shaft rod 2 does not occur.

[0043] Furthermore, as shown in Figs. 5(c) to 5(f), in the second procedure and later, the fixing members 4, 4 are wound around the shaft rod 2 and the base steel materials 51 to 54 at two locations near the upper end 2a and near the lower end 2b of the shaft rod 2. Therefore, even if the operator strongly pulls the other end 60b of the tape measure 60 during measurement, the lower end 2b of the shaft rod 2 is prevented from separating from the base steel materials 51 to 54, and the entire shaft rod 2 is prevented from coming off the base steel materials 51 to 54. Thus, in the tape measure fixture 1, the state in which the shaft rod 2 is in close contact with the base steel materials 51 to 54 is more firmly maintained by the fixing members 3 and 4.

[0044] In addition, the fixing members 4 and 4 are inserted into the insertion holes 2d and 2d in the middle and wound around the shaft rod 2 and the base steel materials 51 to 54, so that the fixing members 4 and 4 are prevented from shifting up and down along the Y direction of the shaft rod 2. Further, since the second screw portion 10 of the fastening member 5 is screwed into the first screw portion 7 of the shaft rod 2 above the annular member 6a of the locking portion 6, the locking portion 6 is prevented from coming off from the first screw portion 7. Therefore, even when the inclination degree of the base steel materials 51 to 54 with respect to the vertical direction is strong, the annular member 6a does not come off from the locking region 9.

[0045] As described above, according to the tape measure fixture 1, even when the operator pulls the other end 60b of the tape measure 60, the position of the zero point of the tape measure 60 is prevented from shifting. Therefore, the opposite side diagonal distances D1 to D4 and the diagonal diagonal distances D5 and D6 can be accurately measured. In addition, since only one operator can read the scale value while pulling the tape measure 60, the burden and time required for measurement are reduced, and the work efficiency is improved. Furthermore, since the starting end 60a of the tape measure 60 is locked to the shaft rod 2 attached to the base steel materials 51 to 54 by the locking portion 6, the operator does not need to hold the starting end 60a. Therefore, the risk of falling onto the liner plate 55 that occurred during this holding in the past is eliminated, and the safety of the operator is also improved.

[0046] In addition, according to the tape measure fixture 1, the center point C6 of the annular member 6a, which is the zero point of the tape measure 60, coincides with the vertices 51b to 54b of the outer corner portions 51K to 54K when the annular member 6a is locked in the locking region 9. Therefore, the zero point of the tape measure 60 can be easily positioned. Then, since the scale value of the measuring tape 60 that coincides with any of the vertices 51b to 54b where the shaft rod 2 is not fixed directly becomes the opposite-side diagonal distances D1 to D4 and the diagonal diagonal distances D5 and D6, there is no need to perform conversion after reading, and the diagonal distance to be obtained promptly can be obtained.

[0047] In addition, according to the measuring tape fixture 1, the state in which the shaft rod 2 is in close contact with the base steel materials 51 to 54 is more firmly maintained by the fixing members 3 and 4 when the shaft rod 2 is attached or when the measuring tape fixture 1 is used. Therefore, even when measuring the opposite-side diagonal distances D1 to D4 and the diagonal diagonal distances D5 and D6 multiple times, it is possible to prevent the zero point of the measuring tape 60 from shifting each time a measurement is taken. Therefore, according to the measuring tape fixture 1, it is possible to shorten the working time and improve the measurement accuracy.

[0048] Further, the fixing members 4 and 4 are inserted into the insertion holes 2d and 2d of the shaft rod 2, so that the fixing members 4 and 4 do not shift up and down along the Y direction of the shaft rod 2, and thus the posture of the shaft rod 2 and the position with respect to the base steel materials 51 to 54 can be stably maintained. Furthermore, since the fixing members 4 and 4 are flexible stainless steel bands, they are easy to handle and have high strength and are difficult to break during use.

[0049] Furthermore, the annular member 6a is sandwiched and held between the fastening member 5 and the base steel materials 51 to 54 when the fastening member 5 is screwed into the first screw portion 7. Therefore, even when the base steel materials 51 to 54 are installed on an inclined surface, the annular member 6a does not come off from the upper end 2a of the shaft rod 2. Therefore, according to the measuring tape fixture 1, there is no need to remeasure, and the measurement can be completed smoothly.

[0050] Note that the measuring tape fixture 1 according to the present invention is not limited to that shown in the embodiment. For example, one of the fixing member 3 and the fixing member 4 may be omitted. Also, the annular member 6a of the locking portion 6 does not necessarily have to be circular, and may be polygonal. Furthermore, the thickness of the belt-like body is not particularly limited, and may be sufficiently thin with respect to the height of the insertion hole 2d.

[0051] The present invention can be used as a tape measure fixing tool for tower installation inspection that fixes the starting end of a tape measure used in tower installation inspection to a foundation steel material that supports the legs of the tower.

Explanation of Signs

[0052] 1... Tape measure fixing tool 2... Shaft rod 2a... Upper end 2b... Lower end 2c... Outer peripheral surface 2d... Insertion hole 3, 4... Fixing members 4a... End portion 4b... Buckle 5... Fastening member 5a... Outer peripheral surface 6... Locking portion 6a... Annular member 6b... Mounting member 6c... Peripheral surface 7... First screw portion 8... Notch 8a... Peripheral surface 8b... Inner corner portion 9... Locking region 10... Second screw portion 50... Center 51 - 54... Foundation steel materials 51K - 54K... Outer corner portions 51a - 54b... Outer peripheral surfaces 51b - 54b... Vertices 51c... Upper edge 55... Liner plate 55a... Opening 60... Tape measure 60a... Starting end 60b... Other end D1 - D4... Opposite side diagonal distances D5, D6... Diagonal distances

Claims

1. A tape measure fixing tool for tower installation inspection, which fixes the starting end of a tape measure used for tower installation inspection to a foundation steel member that supports the leg of the tower, a shaft rod arranged along the longitudinal direction of the foundation steel member, a fixing member for fixing the shaft rod to the foundation steel member, and a locking portion provided at the starting end of the tape measure for locking the starting end to the upper end of the shaft rod. The tape measure fixing tool for tower installation inspection is characterized by comprising the above components.

2. The foundation steel member is square with an outer corner portion on its outer peripheral surface, the shaft rod is provided with a notch portion whose outer peripheral surface is cut out along the longitudinal direction of the shaft rod, and the tape measure fixing tool for tower installation inspection according to Claim 1 is characterized in that the notch portion is formed with an inner corner portion that can be arranged to coincide with the outer corner portion.

3. The fixing member is provided on the peripheral surface of the notch portion and is at least one of a magnet that adsorbs to the outer peripheral surface of the foundation steel member, and a belt-like body wound around the shaft rod and the foundation steel member. The tape measure fixing tool for tower installation inspection according to Claim 2 is characterized by this.

4. The tape measure fixing tool for tower installation inspection according to Claim 3 is characterized in that an insertion hole for inserting the belt-like body is provided through the shaft rod along the short direction of the shaft rod.

5. A retaining member is arranged above the locking portion locked to the upper end of the shaft rod and is detachable from the upper end of the shaft rod, the shaft rod is provided with a first threaded portion at the upper end, and the retaining member is provided with a second threaded portion that engages with the first threaded portion. The tape measure fixing tool for tower installation inspection according to Claim 1 or Claim 2 is characterized by this.

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