JP7570071B2 - Adjustment set - Google Patents

Description

This disclosure relates to an adjustment set used for a jig that temporarily fixes the erection pieces when joining a new steel column to the upper end of an existing steel column.

Conventionally, when joining a new steel column to the upper end of an existing steel column, erection pieces are provided at the upper end of the existing steel column spaced apart in the circumferential direction in order to align and temporarily fasten them together, and erection pieces are provided at the lower end of the new steel column spaced apart in the circumferential direction. First, the erection pieces of the existing steel column and the new steel column are aligned and temporarily fastened together, and then the existing steel column and the new steel column are joined by welding. After welding, the erection pieces are generally melted down.

An example of a system used to temporarily fasten the erection piece of an existing steel column and the corresponding erection piece of a newly installed steel column located above it is disclosed in Patent Document 1. The system set disclosed in Patent Document 1 includes an erection jig, which is an adjustment jig, and a drive unit attached to the top of the erection jig. The erection jig includes a slit into which the erection piece of the existing steel column is inserted, a slit into which the erection piece of the newly installed steel column is inserted, an adjustment bolt in the vertical direction (Z-axis direction), a fall prevention bolt, a misalignment adjustment bolt, a fine adjustment cam, and an adjustment wedge. The drive unit is placed on a drive unit loading platform attached to the top of the erection jig. The drive unit includes a motor, a reducer, a rotating shaft, and a universal shaft to rotate the adjustment bolt. The drive unit is placed on the platform so that the universal shaft extends downward from the rectangular hole of the drive unit platform attached to the top of the erection jig. This allows the universal shaft extending downward from the rectangular hole of the platform to be fitted into the head of the adjustment bolt of the erection jig. A control device such as a personal computer is electrically connected to this drive unit. The control device is equipped with a program that inputs measurement data, rotates the motor the required number of times in a direction that reduces the difference between the measurement data and the reference value, and outputs a control signal to rotate the Z-axis adjustment bolt. In the system configured in this way, the Z-axis adjustment bolt of the erection jig attached to the erection piece of the existing steel column and the erection piece of the new steel column is rotated the required number of times via the universal shaft to adjust the new steel column to the reference value.

JP 2016-121438 A

As mentioned above, the drive unit of the system of Patent Document 1 is equipped with a motor, a reducer, etc., and is generally heavy. Therefore, it is not easy to place the drive unit on the drive unit carrier attached to the top of the erection jig, i.e., the adjustment jig, so that the universal shaft extends from the square hole of the carrier and fits into the head of the adjustment bolt. The object of this disclosure is to provide a configuration that improves the attachment of the drive unit that drives the adjustment bolt of the adjustment jig that temporarily fixes the erection pieces of new steel columns when joining them to the upper ends of existing steel columns.

One aspect of the present disclosure is
An attachment part provided with a guide part and detachably provided on the upper part of an adjustment jig that temporarily fixes the erection piece of an existing steel column and the erection piece of a new steel column provided on the upper part of the existing steel column;
An adjustment set is provided, which includes a drive unit attached to the mounting portion, the drive unit having a shaft portion that can be engaged with the adjustment bolt of the adjustment jig so as to rotate the adjustment bolt, and a guided portion that can be guided by the guide portion.

Preferably, the mounting portion has an opening that is open in a first direction and a second direction that intersects the first direction, and the guide portion and the guided portion are configured such that when the guided portion is guided along the guide portion to mount the drive unit to the mounting portion so that the shaft portion extends in the first direction, the shaft portion enters the opening in the second direction.

Preferably, the opening is a generally U-shaped groove.

Preferably, the drive device includes a shaft support portion that supports the shaft portion, and the shaft support portion includes an advance/retract mechanism that allows the shaft portion to advance/retract in the axial direction of the shaft support portion.

Preferably, the advance/retract mechanism includes a biasing member that biases the shaft portion to protrude from the shaft support portion, and a rotation restricting portion that restricts rotation of the shaft portion around the axis of the shaft support portion.

Preferably, the advance/retract mechanism further includes an engagement portion that engages with the shaft portion when the shaft portion is in a retracted position within the shaft support portion.

Preferably, when the shaft portion is in the retracted position within the shaft support portion, the shaft portion is rotatable about the axis of the shaft support portion and is engageable with the engagement portion.

According to the above aspect of the present disclosure, the above configuration allows the drive unit to be easily attached to the adjustment jig by guiding the guided portion of the drive unit along the guide portion of the mounting portion.

FIG. 1 is a diagram for explaining an example of an automated construction method for steel frame construction. FIG. 2 is a diagram for explaining a method of installing the total station in FIG. 1 . FIG. 1 is a diagram for explaining the installation of the erection set to a steel column, where (a) shows the installed state of the erection piece, and (b) shows the installed state of the erection jig, which is an adjustment jig. A diagram showing a erection set attached to a steel column. 5 is a cross-sectional view taken along line VV in FIG. 4. FIG. 2 is a perspective view of an adjustment set according to one embodiment. 6A to 6C show the steps of attaching the adjustment set to the erection set of FIG. 3, where (a) shows the attachment of the mounting part, (b) shows the attachment of the drive unit to the mounting part, and (c) shows the fitting of the shaft part of the drive unit to the erection jig. FIG. 13 shows an adjustment set attached to a steel column. 13 is a view showing the drive unit and the mounting portion with the cover member removed. FIG. 1A is a cross-sectional view of the shaft support portion, FIG. 1B is a view of its end face, and FIG. 1C is a cross-sectional view taken along line XC-XC in FIG. 1A and 1B are views of a shaft portion, in which FIG. 1A is a front view of a shaft member, and FIG. FIG. 1 is a perspective view of a drive unit on a mounting portion. 1B is an enlarged cross-sectional view taken along line XIIIB-XIIIB in FIG. 1A showing a driving device with a shaft portion in a protruding state; FIG. 1B is a partial cross-sectional view; and FIG. 1A and 1B are diagrams showing a state in which a shaft portion of a drive unit is in a retracted position, in which (a) is a partial cross-sectional view, and (b) is an enlarged cross-sectional view taken along line XIVB-XIVB in (a). 11 is a perspective view showing the drive device being attached to or detached from the mounting portion. FIG. 5A and 5B are diagrams showing the guiding relationship between a guided portion of the drive device and a guiding portion of the mounting portion, in which (a) is a diagram when guiding starts, and (b) is a diagram when guiding is completed.

Embodiments of the present disclosure will be described below with reference to the accompanying drawings. Identical parts (or configurations) are given the same reference numerals, and their names and functions are also the same. Therefore, detailed descriptions thereof will not be repeated.

First, an example of an automated construction method for steel frame construction using an adjustment set S according to an embodiment of the present disclosure will be briefly described. As shown in FIG. 1, a total station (TS) 2 is attached to the top of a steel frame column 1. Then, this total station 2 is used to sight two or more known points Pa and Pb, calculate the position of the total station 2, and measure the position of the steel frame column 1. Then, based on the data, a control device, for example, a mobile computer C shown in FIG. 1, drives a drive device 12 of the adjustment set S (described later), to automatically plumb the steel frame column 1 within the reference value. The total station 2, which is the object to be suspended, is one of surveying instruments, and is a combination of an optical distance meter that measures distance and a theodolite that measures angle, allowing the angle and distance to be observed simultaneously. The total station 2 also has a built-in microcomputer function and an LCD screen, and can automatically store surveying results and can communicate with the control device to send and receive data.

An example of the application of the adjustment set S in this automated steel frame construction method is explained in more detail below. First, the preliminary steps of setting up the adjustment set S are explained.

As shown in Figure 2(a), a total station fixing jig (hereinafter referred to as TS fixing jig) 3, which always keeps the suspended object vertical with a loading platform 3a, is removably attached to the upper part 1a, which is one end of the newly constructed steel column 1, which is the object to be erected. As shown in Figure 2, the TS fixing jig 3 is removably attached to the beam end member 1b on the upper part 1a side of the newly constructed steel column 1 by a support 3b using a joint means such as a three-dimensional clamp (not shown). This TS fixing jig 3 is repurposed as a steel column that serves as the reference for the upper floors, for example, once the erection work for each floor is completed. As described in Patent Document 1, the TS fixing jig 3 is configured to include a metal pipe platform 3a, a hanging member (not shown) that suspends the platform 3a, a base (not shown) that supports the hanging member so that it can rotate in the front-rear and left-right directions, a joint member (not shown) that supports the base so that it can rotate in the front-rear and left-right directions, and an inverted J-shaped support 3b that supports the joint member. The TS fixing jig 3 is also provided with a permanent magnet 3c, which is a magnetic attraction means that fixes the platform 3a, which is suspended from the support 3b of the TS fixing jig 3 fixed to the steel column 1 side, so that the platform 3a on which the total station 2 is placed does not move when the steel column 1 is erected in the vertical direction. The permanent magnet 3c is fixed to the support 3b via a pipe joint or the like.

Next, the total station 2 is placed on the platform 3a of the TS fixing jig 3, and the total station 2 is suspended from the steel column 1. The steel column 1 is then hoisted by a lifting device (not shown) such as a tower crane, and carried to a specified position in the building under construction, as shown in FIG. 1, above the existing steel column 1c in this case. During this process, the total station 2 is supported by the TS fixing jig 3 as shown in FIG. 2(a) to (c) in order, and is installed at a position higher than the capital of the newly installed steel column 1 (see FIG. 1 and FIG. 2(c)). This ensures sufficient visibility when the total station 2 is sighted at two or more known points to calculate the position of the total station 2.

Next, the erection set 4 shown in Fig. 3(a) and (b) is attached to the installed steel column 1. This erection set 4 includes erection pieces 5a and 5b and an erection jig 6, which is an adjustment jig attached to these. As shown in Fig. 3(a), the erection pieces 5a and 5b are fixed to the upper and lower joints between the newly installed steel column 1 and the previous section, i.e., the existing steel column 1c. An erection piece 5a or 5b is provided on each of the four faces of the steel column 1 or 1c. Here, one set of erection pieces 5a or 5b is provided on each face, but multiple sets of erection pieces 5a or 5b may be provided on each face.

As shown in FIG. 3(b), a set of erection pieces 5a and 5b is fitted with an adjustment jig, an erection jig 6 (for example, an commercially available jig called Erection Ace (registered trademark)). The erection jig 6 includes an adjustment bolt 6a in the vertical direction (Z-axis direction), an anti-tip bolt 6b, a misalignment adjustment bolt 6c, a fine adjustment cam 6d, and an adjustment wedge 6e, which are screwed into corresponding screw holes in the jig body 6z. Furthermore, the erection jig 6 includes a first slit 6f in which the erection piece 5a of the newly installed steel column 1 is inserted, and a second slit 6g in which the erection piece 5b of the existing steel column 1 is inserted, which are provided in the jig body 6z. In general, after inserting the erection piece 5a of the steel column 1 into the first slit 6f, the erection piece 5b of the steel column 1c is inserted into the second slit 6g. During this process, the erection pieces 5a and 5b are clamped by the misalignment adjustment bolt 6c extending in the left-right direction, and the misalignment of the steel column 1 relative to the steel column 1c, for example, the misalignment in the left-right direction, can be adjusted. In addition, the erection pieces 5a and 5b can be tightened together by the fall prevention bolt 6b extending upward at the bottom of the erection jig 6. In this way, the erection set 4 equipped with the erection pieces 5a and 5b and the erection jig 6 is attached to each surface of the steel columns 1 and 1c as shown in Figures 4 and 5. In addition, as shown in Figure 4, the adjustment bolt 6a acts on the fine adjustment cam 6d on the adjustment wedge 6e, making it possible to adjust the inclination of the steel column 1 relative to the steel column 1c (see arrows A1 and A2 in Figure 4).

Figure 6 shows an oblique view of the adjustment set S that is attached to the top of the erection set 4. The adjustment set S includes an attachment portion 10 and a drive unit 12.

The adjustment set S will be described in detail later, so here, the adjustment set S will be briefly described. As shown in FIG. 7(a), the mounting part 10 of the adjustment set S is detachably attached to the upper part of the erection jig 6 of the erection set 4. The mounting part 10 includes a base part 14 and a support frame 16 on the underside of the base part 14. The support frame 16 has a shape according to the configuration of the erection jig 6 and the shape of the erection piece 5a so as to accommodate the upper part of the erection jig 6 and a part of the erection piece 5a inside. The support frame 16 is placed on the erection jig 6 so as to accommodate the upper part of the erection jig 6 inside, and thus the mounting part 10 is provided on the upper part of the erection jig 6. Note that a fastening member such as a bolt (not shown) may be provided on the side of the support frame 16, and the support frame 16 may be fixed to the erection jig 6 with this bolt. Then, as shown in FIG. 7(b), the drive unit 12 is attached to this mounting part 10.

The driving device 12 is a device that rotates and drives the adjustment bolt 6a of the erection jig 6. The driving device 12 is equipped with a universal shaft 20, which is a shaft portion that can be fitted into the head of the adjustment bolt 6a. As shown in FIG. 6 and FIG. 7 (b) and (c), the universal shaft 20 extends downward from the main body portion 12B of the driving device 12. Therefore, when the driving device 12 is attached to the mounting portion 10, the universal shaft 20 is at least partially retracted into the driving device 20 as shown in FIG. 7 (b) so that the tip of the universal shaft 20 does not collide with the erection jig 6. After the driving device 12 is attached to the mounting portion 10, the universal shaft 20 is extended from the retracted position to a protruding state according to the arrow in FIG. 7 (b). As a result, as shown in FIG. 7 (c), the universal shaft 20 sufficiently protrudes from the driving device 12, and its tip portion 20b can be fitted into the bolt hole of the head of the adjustment bolt 6a of the erection jig 6. This adjustment set S is provided for each of the erection pieces 5a, 5b and erection jig 6 on the four sides of the steel columns 1, 1c (see FIG. 8). As in FIG. 4, in FIG. 8, the erection set 4 and adjustment set S on the back side (back side of the page) of the steel columns 1, 1c are hidden by the steel columns 1, 1c.

Figure 9 shows the drive unit 12 and the mounting part 10 with the cover member 12a removed. The drive unit 12 is equipped with a motor 22 for driving the universal shaft 20. The drive unit 12 is also equipped with a driver 24 for driving the motor 22. This driver 24 has a communication function and is electrically connected to a control unit. This control unit can be various computers, has a communication function, and can send an operation signal to the driver 24 of the drive unit 12. In this case, the control unit is the mobile computer C shown in Figure 1. The mobile computer C is programmed to output a control signal for rotating the motor 22 the required number of times in a direction that reduces the difference between the measurement data acquired from the total station 2 and the reference value. Therefore, the mobile computer C can rotate the adjustment bolt 6a, which is a screw means for finely adjusting the vertical direction of one or more erection jigs 6 of the four erection sets 4 provided on the steel column 1, 1c, the required number of times via the universal shaft 20, to adjust the steel column 1 to the reference value.

It is also possible to use the steel column 1 with the total station 2 as the column in the initial reference position, and use the total station 2 to measure the positions of other steel columns (not shown) to be installed afterwards, and to repeat the plumbing adjustment of the other steel columns. In a specific method of plumbing adjustment for the other steel columns, after the steel column 1 with the total station 2 is plumbed, a reflector prism (not shown) is detachably attached to the top of the other steel column, which is oriented to face the total station 2, before or after installation. This allows the position of the reflector prism in the other steel column to be plumbed, which is the target of the plumbing adjustment, to be measured by the total station, using the position of the total station 2 in the steel column 1 with the total station 2 as the reference point. Then, the other steel columns are plumbed using the erection set 4 and adjustment set S provided on the other steel columns, so that the error from the reference value falls within a predetermined range. This plumbing adjustment is the same as the adjustment method used for steel column 1 described above, so we will not repeat the explanation.

After that, for example, after all the steel columns on a certain floor have been plumbed, welding work is performed between steel column 1c and steel column 1 with the adjustment set S removed. After that, the erection jig 6 is removed and used elsewhere, and the erection pieces 5a, 5b of each steel column are cut and removed.

The mobile computer C also incorporates a program that outputs a control signal to drive the motor 22 for a skin-fitting process when the drive unit 12 is attached and the tip 20b of the universal shaft 20 is fitted to the head of the adjustment bolt 6a. The skin-fitting process is a process for removing play between the various gears of the drive unit 12 and between the tip 20b and the adjustment bolt 6a. The mobile computer C also incorporates a program that outputs a control signal to drive the motor 22 for a process for loosening the fit between the head and tip 20b of the adjustment bolt 6a when the drive unit 12 is removed. Even if the universal shaft 20 is fitted to the head of the adjustment bolt 6a so that it bites into it due to the operation of the drive unit 12, the motor of the side drive unit 12 may be operated to move the adjustment bolt 6a in the opposite direction to the tightening direction, for example, by a predetermined amount, so that the drive unit 12 can be easily removed when removing the drive unit 12.

In this way, the adjustment set S according to this embodiment is used for the erection work of the steel columns 1, 1c. The configuration of the adjustment set S and its attachment to the erection set 4 are described in detail below.

First, the driving device 12 of the adjustment set S will be described. As shown in FIG. 9, the driving device 12 includes the universal shaft 20, the motor 22, and the driver 24, as well as a speed reduction mechanism 26 and a worm gear 28. The driver 24 is operated by an operating signal from the mobile computer C, which operates the motor 22. The motor 22 is a stepping motor here, but may be another type of motor. The rotational driving force from the motor 22 is reduced in speed by the speed reduction mechanism 26, which includes multiple gears, and transmitted to the worm (screw gear) 30 of the worm gear 28. The worm 30 is meshed with the worm wheel 32 of the worm gear 28. The axis of rotation of the worm wheel 32 extends in the up-down direction, i.e., approximately vertically, in the usage state of FIG. 7 and FIG. 8. A shaft support portion 34 is provided coaxially with the worm wheel 32.

Here, the shaft support portion 34 is composed of a substantially cylindrical member, and an axis 34a extending in the longitudinal direction can be determined. FIG. 10(a) is a cross-sectional view of the shaft support portion 34, taken along the axis 34a. FIG. 10(b) is a side view of only the right end portion of the shaft support portion 34 in FIG. 10(a). FIG. 10(c) is a cross-sectional view of the shaft support portion 34 at a position along the line XC-XC of the shaft support portion 34 in FIG. 10(a). The right end portion of the shaft support portion 34 in FIG. 10(a) is formed with a step 34s, and is a portion that is inserted into the inside of the rotating shaft portion 32b that extends along the rotation axis 32a of the worm wheel 32. The shaft support portion 34 is joined to the rotating shaft portion 32b of the worm wheel 32 by welding. As a result, one end of the shaft support portion 34 on the worm wheel 32 side is closed. Since the shaft support portion 34 is provided coaxially with the worm wheel 32, the rotation axis 32a of the worm wheel 32 coincides with the axis 34a of the shaft support portion 34. The shaft support portion 34 includes a left portion (hereinafter, rotation restricting portion) 34c in FIG. 10(a) having an inner wall surface 34b with a hexagonal cross section, and a right portion (hereinafter, rotation allowing portion) 34d in FIG. 10(a) having an engagement structure. The rotation allowing portion 34d has a shape in which the inner wall surface 34b of the rotation restricting portion 34c is partially expanded radially outward, and allows the end of the universal shaft 20 with a hexagonal cross section, which will be described later, to rotate around the axis 34a of the shaft support portion 34. In the rotation allowing portion 34d, the universal shaft 20 can rotate around the axis of the shaft support portion 34 by an angle θ. The angle θ is 30° here, but is not limited to this angle. The step 34e between the rotation restricting portion 34c and the rotation allowing portion 34d corresponds to the engagement portion.

11 shows the universal shaft 20, which is a shaft portion. FIGS. 11(a) and (b) are a front view and a right side view of the universal shaft 20. The universal shaft 20 is a substantially rod-shaped member extending in the longitudinal direction, and has an axis 20a extending in the longitudinal direction. The universal shaft 20 is formed symmetrically, and both ends 20b, 20c have the same shape. The ends 20b, 20c of the universal shaft 20 are substantially spherical, and have a regular hexagonal shape when viewed from the axis 20a direction as shown in FIG. 11(b), and are dimensioned to a size and shape that can just pass through the inner wall surface 34b of the shaft support portion 34. Therefore, when either of the ends 20b, 20c of the universal shaft 20 is in the rotation restriction portion 34c of the shaft support portion 34, the universal shaft 20 cannot substantially rotate around the axis 34a of the shaft support portion 34. In addition, the rotation restricting portion 34c of the shaft support portion 34 is provided with screw holes 34p, 34q as shown in Figures 10(a) and 10(c). The screw holes 34p, 34q are formed on one imaginary plane perpendicular to the axis 34a and are provided on the diagonal of the axis 34a. In particular, the screw holes 34p, 34q are provided at the corners of the hexagonal cross section of the inner wall surface 34b. Screw members 40, 42 are screwed into the screw holes 34p, 34q so as to protrude from the inner wall surface 34b of the shaft support portion 34 toward the axis 34a (see Figures 13(a) and 14(a)). By providing these screw members 40, 42, both ends 20b, 20c of the universal shaft 20 cannot pass through the rotation restricting portion 34c of the shaft support portion 34. In other words, the middle part 20d between the two ends 20b, 20c of the universal shaft 20 is formed with a smaller cross-sectional area than the two ends 20b, 20c so that the shaft support part 34 can move in the direction of its axis 34a without being restricted by the screw members 40, 42, and is configured here as a part with a circular cross-section.

Based on FIG. 12, the attachment of the universal shaft 20 to the shaft support portion 34 joined to the worm wheel 32 will be described. First, a spring member 44 is inserted as an elastic member into the shaft support portion 34. The spring member 44 is a biasing member. In this state, the universal shaft 20 is inserted. The length of the universal shaft 20 in the longitudinal direction, i.e., in the direction of the axis 20a, is longer than the length of the shaft support portion 34 in the direction of the axis 34a. Then, while the protruding end portion 20b of the universal shaft 20 is protruding, the screw members 40, 42 are screwed into the screw holes 34p, 34q of the shaft support portion 34. As a result, the universal shaft 20 is held by the shaft support portion 34, and the tip portion 20b is biased by the spring member 44 in the protruding direction.

Figure 13 shows the universal shaft 20 in a protruding state. The protruding state is a state in which the universal shaft 20 protrudes further than the retracted position shown in Figure 14, and one end 20c of the universal shaft 20 is located within the rotation restriction portion 34c of the shaft support portion 34. Figure 13(a) is a cross-sectional view of a part of the drive unit 12 around the axis 34a of the shaft support portion 34, showing the universal shaft 20 in a protruding state. Figure 13(b) is a cross-sectional view along line XIIIB-XIIIB in Figure 13(a), showing the universal shaft 20 in a position aligned with the inner wall surface 34b of the rotation restriction portion 34c, which has a hexagonal cross section. When the universal shaft 20 is in a protruding state, the end 20c of the universal shaft 20 in the shaft support portion 34 is located in the rotation restriction portion 34c. Therefore, the universal shaft 20 cannot rotate around the axis 34a of the shaft support portion 34. Therefore, when the other end 20b of the universal shaft 20 is fitted into the bolt hole of the head of the adjustment bolt 6a of the erection jig 6, the rotational driving force from the motor 22 can be appropriately transmitted to the adjustment bolt 6a. When the universal shaft 20 is in a protruding state, the end 20c of the universal shaft 20 receives the biasing force of the spring member 44 at the rotation restriction portion 34c. Therefore, when the universal shaft 20 is in a protruding state and the end 20b is fitted into the adjustment bolt 6a, the end 20c of the universal shaft 20 is positioned at a position in the rotation restriction portion 34c determined by the relative positional relationship between the adjustment bolt 6a and the drive unit 12 (hereinafter, the fitting position). In this way, the fitting position of the end 20c of the universal shaft 20 can vary in the direction of the axis 34a of the rotation restriction portion 34c of the shaft support portion 34.

Figure 14 shows the universal shaft 20 engaged in a retracted position in the shaft support 34. Figure 14(a) is a cross-sectional view of a portion of the drive unit 12 around the axis 34a of the shaft support 34, showing the universal shaft 20 in the retracted position. Figure 14(b) is a cross-sectional view along line XIVB-XIVB in Figure 14(a), showing the end 20c of the universal shaft 20 positioned in the rotation allowance portion 34d and engaged with the step portion 34e, which is the engagement portion. When the universal shaft 20 is engaged in the retracted position, the end 20c of the universal shaft 20 in the shaft support 34 is positioned in the rotation allowance portion 34d. Then, from a state in which the end 20c can advance and retreat through the rotation restriction portion 34c, the universal shaft 20 is rotated by a predetermined angle in a predetermined direction around the axis 34a of the shaft support 34 (see Figure 14(b)). Here, since the end 20c has a hexagonal shape, the predetermined angle is 30° as described above. Therefore, when the drive unit 12 is attached, the more the end 20b of the universal shaft 20 is separated from the head of the adjustment bolt 6a of the erection jig 6 by a predetermined distance or more, the more the universal shaft 20 is held in a recessed state within the shaft support portion 34.

Next, the mounting part 10 of the adjustment set S will be described. As described above, the mounting part 10 is detachably attached to the upper part of the erection jig 6 that temporarily fixes the erection piece 5b of the existing steel column 1c and the erection piece 5a of the new steel column 1 to be installed on the upper part of the existing steel column 1c. The mounting part 10 includes a base part 14 and a support frame 16 on the lower side of the base part 14. The support frame 16 has a substantially rectangular frame shape, with the upper end facing the base part 14 and closed here, and the lower end open. As shown in FIG. 15, the support frame 16 includes U-shaped grooves 16a, 16b and elongated grooves 16c, 16d so as to accommodate the upper part of the erection jig 6 and a part of the erection piece 5a inside. These grooves 16a, 16b, 16c, and 16d can be designed to have various shapes, and may be designed according to the shape and size of the upper part of the erection jig 6 and the erection piece 5a. The support frame 16 is placed on the upper part of the erection jig 6 so as to accommodate the upper part of the erection jig 6 therein, and the mounting part 10 is thereby provided on the upper part of the erection jig 6. At this time, the support frame 16 is designed to have a certain degree of stability, and may be fixed to the erection jig 6 using, for example, bolts (not shown) as described above.

The base 14 is a flat plate-like part. Here, the base 14 is configured with two members, namely, a base main body 50 and a width adjustment part 52. The support frame 16 is fixed to the base main body 50 by welding or the like. The base main body 50 is flat. The width adjustment part 52 is an elongated member. The width adjustment part 52 is a planar shape from which the base main body 50 extends, and is provided so that the distance between the width adjustment part 52 and the base main body 50 can be adjusted. The width adjustment part 52 is supported by a fulcrum member 54, and is provided so as to be rotatable around the fulcrum relative to the base main body 50. The position of the width adjustment part 52 relative to the base main body 50 can be adjusted by adjusting the amount to which the screw member 55, which is provided to pass through a hole provided in the width adjustment part 52, is screwed into the screw hole of the base main body 50.

The table main body 50 has an opening 56 that opens in a first direction D1 and a second direction D2 that intersects with the first direction D1. When in use as shown in FIG. 8, the first direction D1 is the up-down direction, and the second direction D2 is the left-right direction or the depth direction, and is preferably substantially horizontal. Note that the third direction D3 that is perpendicular to the first direction D1 and the second direction D2 is substantially horizontal when in use as shown in FIG. 8, and is referred to as the width direction here. The opening 56 is a substantially U-shaped groove here, but may have other shapes. The opening 56 is configured to allow the aforementioned rotating shaft 32b, shaft support 34, and universal shaft 20 of the drive unit 12 to enter.

As shown in FIG. 16, the base body 50 and the width adjustment part 52 in the base part 14 of the mounting part 10 are provided with a guide part 58. The guide part 58 here has three roller members 60, 62, 64. These roller members 60, 62, 64 have rollers 60b, 62b, 64b that can rotate around axes 60a, 62a, 64a, respectively. The first roller member 60 is provided on the base body 50. The second roller member 62 and the third roller member 64 are provided on the width adjustment part 52 and positioned apart in the second direction. In addition, these roller members are provided alternately, and here, in the second direction D2, the third roller member 64, the first roller member 60, and the second roller member 62 are arranged so as to be shifted from the front side in this order. In this state, the axis 60a of the first roller member 60, the axis 62a of the second roller member 62, and the axis 64a of the third roller member 64 each extend in the first direction D1. In addition, a stopper member 66 is provided on one end of the base body 50 in the second direction D2, i.e., on the opposite side to the open portion 56. These roller members 60, 62, 64 and stopper member 66 are provided on the surface of the base portion 14 of the mounting portion 10 opposite the support frame 16.

The guided portion 70 corresponding to the guide portion 58 of the mounting portion 10 is provided on the drive device 12. The guided portion 70 is a portion that enables guidance by the guide portion 58, and here includes two rail members 72, 74. As shown in FIG. 15, the two rail members 72, 74 are provided on the drive device 12 so as to extend in the second direction D2, apart from each other, particularly parallel to each other here. The rail members 72, 74 have grooves 72a, 74a formed on their outer sides, through which the rollers 60b, 62b, 64b of the roller members 60, 62, 64 can run. However, the rail members 72, 74 may have grooves 72a, 74a formed on their inner sides, through which the rollers 60b, 62b, 64b of the roller members 60, 62, 64 can run.

The guiding of the guided portion 70 of the drive unit 12 by the guide portion 58 of the mounting portion 10 will be described with reference to FIG. 16. In FIG. 16, only the rail members 72, 74 of the guided portion 70 of the drive unit 12 are shown. In FIG. 16(a), the screw member 55 is first loosened to widen the gap between the base body portion 50 and the width adjustment portion 52 in the base portion 14 to some extent. In this state, the user grasps the handles 12c, 12d on both sides of the body portion 12B of the drive unit 12, advances the drive unit 12 to the mounting portion 10 in the second direction, places the rail members 72, 74 of the guided portion 70 on one end of the base portion 14, and advances the drive unit 12 in the second direction D2 along the guide portion 58. As a result, the guided portion 70 is guided along the guide portion 58, and the universal shaft 20 of the drive unit 12 enters the open portion 56 in the second direction D2. The guide portion 58 guides the guided portion 70 until the drive unit 12 hits the stopper member 66. Then, when the drive unit 12 is placed on the mounting portion 10, the screw member 55 is tightened to narrow the gap between the base body portion 50 and the width adjustment portion 52 in the base portion 14, as shown in FIG. 16(b), and the drive unit 12 is fixed to the mounting portion 10.

When the drive unit 12 is attached to the mounting portion 10, the universal shaft 20 may be positioned in the retreated position as described with reference to FIG. 14. When the drive unit 12 is attached to the mounting portion 10, the universal shaft 20 may be rotated around its axis to release the engagement with the engagement portion, and may be in a protruding state as described with reference to FIG. 13. This allows the protruding tip 20b of the universal shaft 20 to be fitted into the adjustment bolt 6a of the erection jig 6 (see FIGS. 7(b) and (c)). The middle portion 20d of the universal shaft 20 is thinner than both ends 20b and 20c, and has a swing width from the axis 34a of the shaft support portion 34. Therefore, the tip 20b of the universal shaft 20 can be more easily fitted into the adjustment bolt 6a of the erection jig 6.

As described above, in the adjustment set S of the above embodiment, the mounting part 10 is provided with the guide part 58, and the drive unit 12 is provided with the guided part 70. Therefore, the drive unit 12 can be more easily placed on the mounting part 10 compared to the case where the drive unit is placed on the mounting part from the first direction D1.

Although the embodiments and their modifications according to the present disclosure have been described above, the present disclosure is not limited thereto. Various substitutions and modifications are possible without departing from the spirit and scope of the present disclosure as defined by the claims of this application.

1, 1c Steel column 2 Total station 3 Total station fixing jig (TS fixing jig)
4 Erection set 5a, 5b Erection piece 6 Erection jig (adjustment jig)
[0033] 6a Adjustment bolt 6b Anti-tip bolt 6c Misalignment adjustment bolt 6d Fine adjustment cam 6e Adjustment wedge 10 Mounting portion 12 Driving device 14 Base portion 16 Support frame 20 Universal shaft 22 Motor 28 Worm gear 30 Worm 32 Worm wheel 34 Shaft support portion 34c Rotation restricting portion 34d Rotation allowing portion 34d Step portion 34p, 34q Screw holes 40, 42 Screw member 50 Base main body portion 52 Width adjustment portion 54 Pivot member 56 Opening portion 58 Guide portion 60, 62, 64 Roller member 66 Stopper member 70 Guided portion 72, 74 Rail member S Adjustment set

Claims (7)

An attachment part provided with a guide part and detachably provided on the upper part of an adjustment jig that temporarily fixes the erection piece of an existing steel column and the erection piece of a new steel column provided on the upper part of the existing steel column;
An adjustment set comprising: a drive unit attached to the mounting portion, the drive unit having a shaft portion that can be engaged with the adjustment bolt of the adjustment jig so as to drive the adjustment bolt to rotate, and a guided portion that can be guided by the guide portion. the mounting portion has an opening portion that is open in a first direction and a second direction intersecting the first direction,
The guide portion and the guided portion are configured such that when the guided portion is guided along the guide portion to attach the drive device to the attachment portion so that the shaft portion extends in the first direction, the shaft portion enters the opening portion in the second direction.
The adjustment set according to claim 1 . The opening is a generally U-shaped groove.
The adjustment set according to claim 2. The drive device includes a shaft support portion that supports the shaft portion,
The shaft support portion includes an advancing/retracting mechanism that enables the shaft portion to be advanced and retreated in an axial direction of the shaft support portion.
An adjustment set according to any one of claims 1 to 3. The advance/retract mechanism includes:
a biasing member that biases the shaft portion so as to protrude from the shaft support portion;
a rotation restricting portion that restricts rotation of the shaft portion around the axis of the shaft support portion,
5. The adjustment set according to claim 4. the advance/retract mechanism further includes an engagement portion that engages with the shaft portion when the shaft portion is in a retracted position within the shaft support portion,
The adjustment set according to claim 4 or 5. When the shaft portion is in the retracted position within the shaft support portion, the shaft portion is rotatable about an axis of the shaft support portion and is engageable with the engagement portion.
The adjustment set according to claim 6.

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