Column base alignment device

Abstract

The present invention provides a column base alignment device that allows for easy alignment of the column base relative to the foundation without the need for a plumb bob, and the device itself. [Solution] The column base alignment device 1 is used to align the column base B with respect to the column base foundation F1 when fixing the column base B to the column base foundation F1. The column base alignment device 1 comprises an upper wall 2 attached to a base plate B2 provided at the lower end of the column base B, a vertical wall 3 connected to the upper wall 2 and facing the side wall of the base plate B2, and a lower wall 4 connected to the lower part of the vertical wall 3 and facing the upper surface of the column base foundation F1. The vertical wall 3 has a vertical slit 33 that allows visualization of the misalignment of the vertical wall 3 with respect to a marking line B3 drawn on the side wall of the base plate B2 and extending in the vertical direction, and the lower wall 4 has a lower slit 44 that allows visualization of the misalignment of the lower wall 4 with respect to a ground marking line F3 drawn on the column base foundation F1 and extending in the front-rear direction.

Description

Technical Field

[0001] The present invention relates to a column base alignment tool, and particularly to a column base alignment tool used for aligning a column base with respect to a foundation.

Background Art

[0002] The lower end of a column is called a column base and is firmly fixed to a foundation, which is a substructure, to support a building. Conventionally, a method called "exposed type" that fixes a column base to a foundation by connecting an anchor bolt embedded in the foundation and a base plate fixed to the column base has become widespread. To explain the fixing method of the exposed type column base, the base plate is formed with assembly holes through which the anchor bolts can be inserted, and the column base is assembled to the foundation through the base plate by inserting the anchor bolts into the assembly holes and fastening them. At this time, in order to fix the column base at an accurate position, a positioning operation of the column base is required.

[0003] Generally, when performing a positioning operation of a construction member, a positioning jig called a "hanging down" is used. The hanging down has a thread and a reverse conical weight attached to the tip of the thread. By attaching the base end of the thread to the column base and visually checking the positional deviation between the tip of the weight and the ground ink drawn on the foundation, the alignment operation of the column base can be performed. Patent Document 1 and Patent Document 2 describe that the hanging down is used in the alignment operation of a construction member.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0005] As described in Patent Documents 1 and 2, a plumb bob can be used to easily position a construction member located above relative to a marking line drawn below. However, when using a plumb bob to position the base of a column relative to a foundation, the following problems have been pointed out. Specifically, since the alignment of the base of a column relative to a foundation is an outdoor task, the swinging of the plumb bob's weight due to wind can reduce work efficiency.

[0006] The present invention has been made in view of the above-mentioned problems, and the object of the present invention is to provide a column base alignment device that can easily align a column base with respect to a foundation without using a plumb bob. [Means for solving the problem]

[0007] The aforementioned problem is solved by providing a column base alignment device used to align a column base with respect to a foundation when fixing the column base to the foundation, comprising: a mounting portion attached to a base plate provided at the lower end of the column base; a vertical wall connected to the mounting portion and facing the side wall of the base plate; and a lower wall connected to the lower part of the vertical wall and facing the upper surface of the foundation, wherein the vertical wall has a marking line measurement portion that allows visual confirmation of the misalignment of the vertical wall with respect to marking lines drawn on the side wall of the base plate and extending in the vertical direction, and the lower wall has a ground mark measurement portion that allows visual confirmation of the misalignment of the lower wall with respect to ground marks drawn on the foundation and extending in the front-rear direction.

[0008] According to the above configuration, the column base alignment device comprises a mounting part that is attached to the base plate, a vertical wall facing the side wall of the base plate, and a lower wall facing the top surface of the foundation. The vertical wall has a marking line measurement section that allows for visual confirmation of misalignment of the marking line, and the lower wall has a ground mark measurement section that allows for visual confirmation of misalignment of the ground mark. Therefore, by attaching the column base alignment device to the base plate, it becomes possible to easily align the column base with the foundation without using a plumb bob.

[0009] Furthermore, the mounting portion may be an upper wall that can be placed on the upper surface of the base plate. According to the above configuration, the column base alignment device can be attached to the base plate by simply placing the upper wall on the top surface of the base plate, making it possible to easily align the column base with the foundation without using a plumb bob.

[0010] Furthermore, the upper wall may have a magnet that adheres to the upper surface of the base plate. With the above configuration, the column base alignment device can be attracted to the base plate by the magnetic force of the magnet, making it possible to prevent the column base alignment device from shifting position during the alignment process.

[0011] Furthermore, the marking line measurement section may have an elongated hole extending in the vertical direction and an expanding section located at the upper end of the elongated hole that widens to the left and right as it extends upward, while the ground mark measurement section may have an elongated hole extending in the front-to-back direction. With the above configuration, the misalignment of the vertical wall relative to the marking line can be accurately visualized through the elongated hole in the marking line estimation section, and the marking line can be quickly identified through the expanding section, allowing the column base alignment device to be easily attached to the column base in the correct position. Furthermore, since the misalignment of the lower wall relative to the ground mark can be accurately visualized through the elongated hole in the ground mark estimation section, it is possible to easily align the column base with the foundation without using a plumb bob.

[0012] Furthermore, the vertical wall comprises a vertical frame that forms the skeleton of the vertical wall and a vertical translucent wall made of a translucent material and attached to the vertical frame; the lower wall comprises a lower frame that forms the skeleton of the lower wall and a lower translucent wall made of a translucent material and attached to the lower frame; the marking line measurement section has a vertical reference line drawn extending vertically on the side surface of the vertical translucent wall facing the base plate; and the ground mark measurement section preferably has a lower reference line drawn extending in the front-to-back direction on either the upper or lower surface of the lower translucent wall and a scale drawn on the other surface. According to the above configuration, the column base alignment device has a translucent wall on which a vertical reference line is drawn. Therefore, the column base alignment device can be easily attached to the column base in the correct position. Furthermore, the column base alignment device has a translucent wall with a lower reference line and markings. Therefore, by attaching the column base alignment device to the column base and comparing the ground markings from above with the lower reference line and markings, it is possible to align the column base with the foundation while confirming that you are looking from directly above, thus enabling accurate alignment.

[0013] Furthermore, the vertical reference line comprises an upper vertical reference line drawn on the upper part of the vertical translucent wall and a lower vertical reference line drawn on the lower part of the vertical translucent wall, and the upper vertical reference line and the lower vertical reference line are drawn at equal positions in the left-right direction and spaced apart from each other in the vertical direction. With the above configuration, by confirming that the marking lines extend linearly in the vertical direction with respect to the upper vertical reference line and the lower reference line, it becomes possible to confirm that the column base alignment device is installed in the correct position relative to the column base.

[0014] Furthermore, the vertical frame and the vertical translucent wall may be made of different synthetic resin molded bodies, and the lower frame and the lower translucent wall may be made of different synthetic resin molded bodies. According to the above configuration, by combining a highly rigid synthetic resin molded body with a highly translucent synthetic resin molded body, it becomes possible to construct a column base alignment device with desired properties.

[0015] Also, the lower wall has a first lower wall connected to the lower end of the vertical wall, and a second lower wall connected to the vertical wall above the first lower wall, and the first lower wall and the second lower wall may be spaced apart from each other in the vertical direction. According to the above configuration, by comparing the floor ink on the floor ink measurement part of the first lower wall and the floor ink measurement part of the second lower wall, it is possible to align the column base with respect to the foundation while confirming that it is viewed from directly above, and accurate alignment is possible.

[0016] Also, the first lower wall has an extension portion that extends in a direction away from the vertical wall more than the second lower wall, and the floor ink measurement part may be provided on the extension portion. According to the above configuration, since the floor ink can be easily compared with the floor ink measurement part of the first lower wall and the floor ink measurement part of the second lower wall, it is possible to improve the workability of the column base alignment work.

Effect of the Invention

[0017] According to the alignment tool of the present invention, it is possible to easily align the column base with respect to the foundation without using lowering and swinging.

Brief Description of the Drawings

[0018] [Figure 1] It is a perspective view showing the state before assembling the column base to the foundation of the building. [Figure 2] It is a perspective view showing the state after assembling the column base to the foundation of the building. [Figure 3] It is a perspective view showing the state where the column base alignment tool and the position adjustment tool are attached after assembling the column base to the foundation of the building. [Figure 4] It is a perspective view of the column base alignment tool seen from obliquely forward. [Figure 5] It is a perspective view of the column base alignment tool seen from obliquely backward. [Figure 6] It is a front view of the column base alignment tool. [Figure 7]This is a top view of the column base alignment device. [Figure 8] This diagram shows the workflow for aligning the position of a column base using a column base alignment device. [Figure 9] This is a view from diagonally above showing the column base alignment device installed. [Figure 10] This is a view from diagonally above, showing the column bases aligned with the foundation. [Figure 11] This is a perspective view of the positioning jig. [Figure 12] This is a perspective view of the column base alignment device according to the second embodiment, viewed from an oblique front angle. [Figure 13] This is a front view of the column base alignment device according to the second embodiment. [Figure 14] This is a top view of the column base alignment device according to the second embodiment. [Figure 15] This is a perspective view of the column base alignment device according to the third embodiment, viewed from an oblique front angle. [Figure 16] This is a top view of the column base alignment device according to the third embodiment. [Modes for carrying out the invention]

[0019] Hereinafter, with reference to Figures 1 to 11, a column base alignment device 1 according to one embodiment of the present invention (hereinafter referred to as "this embodiment") will be described. However, the embodiments described below are merely examples to facilitate understanding of the present invention and do not limit the present invention. In other words, the present invention can be modified and improved without departing from its spirit, and of course, equivalents thereof are included in the present invention.

[0020] <Overview of Foundation F and Column Base B> First, we will describe the outline of the building's foundation F and the column base B fixed to the foundation F, referring to Figures 1 to 3. As shown in Figures 1 and 2, the foundation F consists of a column base foundation F1 to which the column base B is fixed, and a foundation beam F2 extending laterally from the column base foundation F1. The column base foundation F1 is a foundation structure that supports the column base B. Anchor bolts F1a and column support brackets F1b are embedded in the column base foundation F1. The anchor bolts F1a and column support brackets F1b are used to assemble the column base B to the column base foundation F1. Furthermore, ground markings F3 are drawn on the upper surface of the column base foundation F1 to indicate the fixing position of column base B. Specifically, four ground markings F3 are drawn extending in four directions from the center of the column base foundation F1. Ground markings F3 are used when aligning column base B with respect to the column base foundation F1. The method for aligning column base B will be described later. Foundation beam F2 connects the column base foundations F1 together and supports the building in conjunction with the column base foundations F1. The upper end of foundation beam F2 is located above the upper end of the column base foundations F1.

[0021] Column base B is an exposed column base. Specifically, column base B has a column B1 and a base plate B2 at the lower end of column B1. Column B1 is a square steel pipe, but is not limited to this. Column B1 may also be a circular steel pipe. The base plate B2 is a plate-like body fixed to the lower end of the column B1 by welding. The base plate B2 is provided with an assembly hole B2a and an assembly frame (not shown). The assembly hole B2a penetrates the base plate B2 vertically and has a hole diameter larger than the diameter of the anchor bolt F1a embedded in the column base foundation F1. The assembly frame is provided in the center of the lower surface of the base plate B2 and has a shape corresponding to the column support F1b (shear fitting) embedded in the column base foundation F1. Therefore, as will be explained below, the column base B can be fixed to the column base foundation F1 via the base plate B2.

[0022] Four marking lines B3 are drawn on the top surface B2c and side surface B2d of base plate B2. Specifically, marking lines B3 extend vertically from the center of side surface B2d of base plate B2. Marking lines B3 are used when aligning column base B with respect to column base foundation F1. The method for aligning column base B will be described later.

[0023] When fixing column base B to column base foundation F1, column base B is first suspended from above and lowered over column base foundation F1. Then, column support F1b is assembled to the assembly frame, and anchor bolts F1a are inserted through assembly holes B2a and fastened with fastening nuts F1c, thereby allowing column base B to be assembled to column base foundation F1. Here, the diameter of the assembly hole B2a is larger than the diameter of the anchor bolt F1a. As a result, column base B may be assembled in a position that is horizontally off-center relative to column base foundation F1. More specifically, it may be assembled in a position different from the correct position where the four ground markings F3 drawn on column base foundation F1 and the four marking lines B3 drawn on base plate B2 overlap vertically.

[0024] Traditionally, a plumb bob was suspended from the marking line B3, and the positional relationship between the tip of the plumb bob and the ground mark F3 was observed to confirm whether the column base B was properly assembled to the column base foundation F1. However, as mentioned above, the alignment work for the column base B is performed outdoors. As a result, the plumb bob is swayed by the wind, leading to decreased work efficiency and increased labor costs.

[0025] As shown in Figure 3, by attaching the column base alignment device 1 to the base plate B2, it becomes possible to visually check the misalignment of the marking line B3 relative to the ground mark F3 without being affected by wind, even when working outdoors. This makes it possible to easily align the column base B with the column base foundation F1 without using a plumb bob. Details of the column base alignment device 1 will be described later with reference to Figures 4 to 7. Furthermore, a position adjustment jig 10 is installed between the foundation beam F2 and the base plate B2. The position adjustment jig 10 is used to adjust the column base B to the correct position if it is found that the column base B has been assembled in a position different from the correct position via the column base alignment device 1. Details of the position adjustment jig 10 will be described later with reference to Figure 11. Once the column base B is properly positioned relative to the column base foundation F1, grout material (not shown) is injected between the column base foundation F1 and the column base B to fix the column base B to the column base foundation F1.

[0026] <Column base alignment device 1> Next, the column base alignment device 1 will be described with reference to Figures 4 to 7. Figure 4 is a perspective view of the column base alignment device 1 from the front at an angle, Figure 5 is a perspective view of the column base alignment device 1 from the rear at an angle, and Figures 6 and 7 are the front view and top view of the column base alignment device 1, respectively. The column base alignment device 1 is made of resin and is integrally molded using additive manufacturing technology with a 3D printer. A 3D printer can form a three-dimensional structure by using three-dimensional model data that shows the desired three-dimensional shape and stacking multiple layers made of resin material. By molding the column base alignment device 1 with a 3D printer, it is possible to reduce the weight and cost of the column base alignment device 1.

[0027] The column base alignment device 1 comprises an upper wall 2 and a lower wall 4 that extend horizontally at the upper and lower ends, and a vertical wall 3 that extends vertically between the upper wall 2 and the lower wall 4 and connects them. The upper wall 2, the vertical wall 3, and the lower wall 4 are plate-like bodies.

[0028] The upper wall 2 has an upper surface 21 and a lower surface 22, and a magnet 23 is attached to the lower surface 22 (see Figure 5). Therefore, when the upper wall 2 is placed on the upper surface B2c of the base plate B2 provided at the lower end of the column base B, the magnetic force of the magnet 23 attracts the base plate B2 and attaches it to the base plate B2. Furthermore, it is possible to suppress the reduction in workability due to the effects of wind during the alignment work of the column base B which is performed outdoors. The upper wall 2 corresponds to the mounting part of the present invention.

[0029] The vertical wall 3 is connected to the upper wall 2 and extends vertically, having a front surface 31 and a rear surface 32. When the upper wall 2 is attached to the base plate B2, the vertical wall 3 faces the side surface B2d of the base plate B2. At this time, the rear surface 32 becomes the opposing surface facing the side surface B2d of the base plate B2.

[0030] Furthermore, the vertical wall 3 has a vertical slit 33 extending in the vertical direction, and an expanding portion 34 located at the upper end of the vertical slit 33, which widens to the left and right as it extends upward. The vertical slit 33 extends from the upper end to the lower end of the vertical wall 3 and is a through-hole that penetrates the vertical wall 3 in the front-rear direction. The vertical slit 33 serves as a viewing window for visualizing the amount of misalignment of the marking line B3 drawn on the side surface B2d of the base plate B2 through the vertical wall 3. By visualizing the misalignment of the marking line F3 through the vertical slit 33, the worker can confirm that the column base alignment device 1 is properly installed relative to the column base B.

[0031] The vertical slit 33 has dimensions that allow the misalignment of the marking line B3 to be visually observed. Specifically, it is preferable that the length of the vertical slit 33 be longer than the marking line B3. This allows the worker to visually observe the misalignment between the marking line F3 and the ground mark F3 drawn below the marking line F3 through the vertical slit 33 when viewing the column base alignment device 1 from diagonally above (see Figures 9 and 10). Furthermore, it is preferable that the vertical slit 33 has a width of two to three times the thickness of the scribed line B3 (see Figure 10). If the width of the vertical slit 33 is narrower than the thickness of the scribed line B3, it will not be possible to check for misalignment of the scribed line B3. Also, if the width of the vertical slit 33 is sufficiently large compared to the thickness of the scribed line B3, it will be difficult to determine whether the scribed line B3 is deviated in the left-right direction relative to the vertical slit 33. The vertical slit 33 corresponds to the elongated hole and scribed line estimation section of the present invention.

[0032] The expanding portion 34 is positioned to straddle the front end of the upper wall 2 and the upper end of the vertical wall 3. In other words, the expanding portion 34 penetrates the upper wall 2 in the vertical direction, forming a notch 24 in the upper wall 2, and also penetrates the vertical wall 3 in the front-rear direction. The lower end of the expanding section 34 has the same width as the vertical slit 33, and becomes wider towards the top, with the upper end having a width approximately 10 times the thickness of the marking line F3 (see Figure 10). This allows the worker to easily place and attach the column base alignment device 1 to the base plate B2 while confirming the position of the marking line B3. The expanding section 34 corresponds to the marking line estimation section of the present invention.

[0033] The lower wall 4 is connected to the lower part (lower end) of the vertical wall 3. The lower wall 4 has an upper surface 41 and a lower surface 42. When the upper wall 2 is attached to the base plate B2, the lower wall 4 faces the upper surface of the column base foundation F1. At this time, the lower surface 42 becomes the opposing surface facing the column base foundation F1.

[0034] Furthermore, the lower wall 4 has a lower slit 44 extending in the front-rear direction, and a lower reference line 45 drawn on the upper surface 41 and the front surface 43. The lower slit 44 extends from the front end to the rear end of the lower wall 4 and is a through-hole that penetrates the lower wall 4 in the vertical direction. The lower slit 44 serves as a viewing window for visually checking the amount of displacement of the ground mark F3 drawn on the upper surface of the column base foundation F1 through the lower wall 4. By checking the displacement of the ground mark F3 through the lower slit 44, the worker can confirm that the column base alignment device 1 is in the correct position relative to the column base foundation F1, and thereby confirm that the column base B is properly aligned with the column base foundation F1.

[0035] The lower slit 44 has dimensions that allow for visual confirmation of any misalignment of the ground mark F3. Specifically, the lower slit 44 has dimensions that allow a worker viewing the column base alignment device 1 and the column base foundation F1 from above to visually confirm that the first lower reference line 451 and the second lower reference line 452 drawn before and after the lower slit 44, and the ground mark F3, extend in a straight line (see Figure 10). The length of the lower slit 44 is 10 millimeters, but is not limited to this. Furthermore, it is preferable that the lower slit 44 has a width of two to three times the thickness of the ground mark F3. If the width of the lower slit 44 is narrower than the thickness of the ground mark F3, it will not be possible to confirm the positional deviation of the ground mark F3. Also, if the width of the lower slit 44 is sufficiently larger than the thickness of the ground mark F3, it will be difficult to determine whether or not the ground mark F3 is deviated in the left-right direction relative to the lower slit 44. The lower slit 44 and the lower reference line 45 correspond to the ground mark measurement section of the present invention.

[0036] <Method for aligning column base B using column base alignment device 1> Next, we will explain how to align column base B with column base foundation F1. Figure 8 shows the workflow for aligning column base B with column base foundation F1. As shown in Figure 8, column base B is first assembled to column base foundation F1 (step S10). Specifically, a worker lifts column base B using a lifting machine and lowers it onto column base foundation F1. The worker then assembles the column support F1b of column base foundation F1 to the assembly frame provided at the lower end of base plate B2, and inserts anchor bolts F1a through assembly holes B2a and fastens them with fastening nuts F1c. This completes the assembly of column base B to column base foundation F1.

[0037] Next, the worker attaches the column base alignment device 1 to the base plate B2 of the column base B (step S11). Specifically, while checking the marking line B3 drawn on the side surface B2d of the base plate B2, the worker places the column base alignment device 1 on the upper surface B2c of the base plate B2 so that the marking line B3 is located at the left-right center of the vertical slit 33. At this time, the magnet 23 provided on the lower surface 22 of the upper wall 2 is attracted to the base plate B2. As a result, the column base alignment device 1 is firmly attached to the column base foundation F1, and it is possible to suppress the reduction in work efficiency caused by the displacement of the column base alignment device 1 relative to the column base B due to the effects of wind.

[0038] Figure 9 shows the column base alignment device 1 attached to the base plate B2. As shown in Figure 9, the column base alignment device 1 is installed so that the marking line B3 drawn on the base plate B2 is located at the center in the left-right direction of the vertical slit 33 of the vertical wall 3.

[0039] Next, the worker confirms the positional deviation of column base B relative to column base foundation F1 (step S12). Specifically, the worker confirms the positional deviation of column base B relative to column base foundation F1 by comparing the ground mark F3 drawn on column base foundation F1 with the lower slit 44 or lower reference line 45 of lower wall 4. In Figure 9, the ground mark F3 is deviated to the right from the worker's perspective from the lower slit 44 or lower reference line 45 of the lower wall 4.

[0040] Next, the worker operates the position adjustment jig 10 to adjust the position of column base B relative to column base foundation F1 (step S13). Specifically, based on the position deviation confirmed in step S12, the worker adjusts column base B so that it is in the correct position relative to column base foundation F1.

[0041] As shown in Figure 3, a position adjustment jig 10 is installed between the foundation beam F2 and the base plate B2. More specifically, the position adjustment jig 10 is interposed between the side surface of the foundation beam F2 and the side surface B2d of the base plate B2. By manipulating the position adjustment jig 10 to change its length, the worker can adjust the distance between the foundation beam F2 and the base plate B2, thereby enabling the column base B to be positioned correctly relative to the column base foundation F1.

[0042] Figure 11 is a perspective view of the position adjustment jig 10. As shown in Figure 11, the position adjustment jig 10 mainly consists of a horizontal support section 11, a vertical support section 12, and a position adjustment section 13. The horizontal support section 11 and the vertical support section 12 are made of steel angle material. The horizontal support section 11 abuts against the upper surface of the foundation beam F2, and the vertical support section 12 abuts against the side surface of the foundation beam F2, allowing them to work together to support the position adjustment jig 10.

[0043] The position adjustment section 13 includes an extension member 13a extending horizontally from the lower end of the vertical support section 12, and a position adjustment bolt 13c that screws into a threaded hole 13b formed on the inside of the extension member 13a and protrudes from the tip side of the extension member 13a. The extension member 13a is a tall nut with a threaded hole 13b formed therein, and is fixed to the vertical support section 12 by welding. The position adjustment bolt 13c is screwed into the threaded hole 13b. Therefore, the operator can change the amount of protrusion from the tip of the extension member 13a by rotating the head of the position adjustment bolt 13c.

[0044] The position adjustment jig 10, configured as described above, is installed between the foundation beam F2 and the base plate B2, as shown in Figure 3. The worker adjusts the position of the column base B relative to the column base foundation F1 by rotating the head of the position adjustment bolt 13c to change the amount of protrusion of the position adjustment bolt 13c, based on the position deviation of the column base B confirmed in step S13.

[0045] Figure 10 shows the state in which the column base B is aligned with the column base foundation F1. As shown in Figure 10, when the position of the column base B is adjusted by the position adjustment jig 10, when a worker looks at the column base alignment device 1 from directly above, they can confirm that the ground mark F3 is located in the center of the lower slit 44 in the left-right direction, and that the ground mark F3 and the lower reference line 45 are aligned in a straight line.

[0046] With the above steps completed, the alignment of column base B with respect to column base foundation F1 is finished. By using the column base alignment tool 1, the worker can easily align column base B with foundation F without using a plumb bob.

[0047] The above-described embodiment of the column base alignment device 1 is merely an example to facilitate understanding of the present invention and does not limit the present invention. In the embodiment described above, it was explained that a vertical slit 33 is formed in the vertical wall 3 and a lower slit 44 is formed in the lower wall 4, but the invention is not limited to this. It is sufficient that the amount of displacement between the marking line B3 drawn on the base plate B2 and the ground mark F3 drawn on the column base foundation F1 can be visually confirmed, and the vertical wall 3 and the lower wall 4 may be translucent.

[0048] <Second Embodiment> Next, a column base alignment device 1A according to the second embodiment will be described with reference to Figures 12 to 14. In the column base alignment device 1A according to the second embodiment, the amount of misalignment between the scribe line B3 and the ground mark F3 can be visually confirmed through a translucent member. Figure 12 is a perspective view of the column base alignment device 1A seen from the front at an oblique angle, and Figures 13 and 14 are a front view and a top view of the column base alignment device 1A, respectively.

[0049] The column base alignment device 1A is made of resin and comprises a main frame 1Aa molded using additive manufacturing technology with a 3D printer, a vertical translucent wall 3Ab that fits into the main frame 1Aa, and a lower translucent wall 4Ab. The main frame 1Aa, the vertical translucent wall 3Ab, and the lower translucent wall 4Ab are molded bodies made of different materials. Specifically, the main frame 1Aa is a molded body made of ABS resin or carbon fiber reinforced plastic, which have excellent strength and durability, but is not limited to these. The strength of the main frame 1Aa may be improved by heat treatment after molding. On the other hand, the vertical light-transmitting wall 3Ab and the lower light-transmitting wall 4Ab are molded articles made of transparent acrylic resin, but are not limited to this. The vertical light-transmitting wall 3Ab and the lower light-transmitting wall 4Ab may also be molded articles made of transparent polycarbonate resin. The main frame 1Aa, the vertical light-transmitting wall 3Ab, and the lower light-transmitting wall 4Ab correspond to the synthetic resin molded articles of the present invention.

[0050] The main frame 1Aa comprises an upper wall 2A, a vertical frame 3Aa, and a lower frame 4Aa. The upper wall 2 and lower frame 4Aa are located at the upper and lower ends of the main frame 1Aa, and the vertical frame 3Aa extends vertically, connecting the upper wall 2 and the lower frame 4Aa. The upper wall 2A has an upper surface 21 and a lower surface 22, and an upper reference line 25A extending in the front-to-back direction is drawn on the upper surface 21. By visually checking from above whether the upper reference line 25A and the lower reference line 45A are aligned in a straight line, the worker can align the column base B with the column base foundation F1 while confirming that the column base alignment device 1A is viewed from directly above. On the other hand, a magnet 23 is attached to the lower surface 22.

[0051] Furthermore, the upper wall 2A has a fitting portion 26A into which the vertical translucent wall 3Ab can be fitted. The fitting portion 26A is a fitting groove formed on both the left and right sides on the front side of the upper wall 2A. The fitting portion 26A has a width approximately equal to the thickness of the vertical translucent wall 3Ab, and the two can be fitted together by inserting the vertical translucent wall 3Ab from above to below the upper wall 2A.

[0052] The vertical wall 3A mainly consists of a vertical frame 3Aa that forms the framework of the vertical wall 3A, and a vertical translucent wall 3Ab attached to the vertical frame 3Aa. The vertical light-transmitting wall 3Ab has a vertical slit 33A extending in the vertical direction, and an expanding portion 34 located at the upper end of the vertical slit 33A, which widens to the left and right as it extends upward. The vertical slit 33 is located above the vertical translucent wall 3Ab and penetrates the vertical translucent wall 3Ab in the front-to-back direction. The vertical frame 3Aa corresponds to the vertical frame body of the present invention.

[0053] The expansion section 34 is positioned to straddle the front end of the upper wall 2 and the upper end of the vertical translucent wall 3Ab. In other words, the expansion section 34 penetrates the upper wall 2 in the vertical direction, forming a notch 24 in the upper wall 2, and also penetrates the vertical wall 3 in the front-rear direction.

[0054] A vertical reference line 35A is drawn on the back surface 32 of the vertical translucent wall 3Ab. The vertical reference line 35A has an upper vertical reference line 35A1 drawn on the upper part of the vertical translucent wall 3Ab and a lower vertical reference line 35A2 drawn on the lower part. The upper vertical reference line 35A1 and the lower vertical reference line 35A2 are drawn at equal positions in the left-right direction, and are separated vertically. The vertical translucent wall 3Ab and the vertical reference line 35A serve as viewing windows for visualizing the amount of misalignment of the marking line B3 drawn on the side surface B2d of the base plate B2 through the vertical wall 3A. By confirming that the marking line F3 is aligned in a straight line with the upper vertical reference line 35A1 and the lower vertical reference line 35A2 through the vertical translucent wall 3Ab, the worker can confirm that the column base alignment device 1 is installed in the correct position relative to the column base B. The vertical translucent wall 3Ab and the vertical reference line 35A correspond to the marking line measurement section of the present invention.

[0055] The lower wall 4A mainly consists of a lower frame 4Aa that forms the framework of the lower wall 4A, and a lower translucent wall 4Ab attached to the lower frame 4Aa. The lower frame 4Aa has a fitting portion 47A into which the lower translucent wall 4Ab can be fitted. The fitting portion 47A is a fitting recess having a shape corresponding to the shape of the lower translucent wall 4Ab. The fitting portion 47A can be fitted by inserting the lower translucent wall 4Ab from above to below the lower wall 4A. The lower frame 4Aa corresponds to the lower frame body of the present invention.

[0056] A lower reference line 45A is drawn on the upper surface 41 of the lower translucent wall 4Ab. The lower reference line 45A is located in the center in the left-right direction and extends in the front-back direction between the front and rear ends of the lower translucent wall. Furthermore, a scale 46A is drawn on the lower surface 42 of the lower translucent wall 4Ab. The scale 46A is located in the center in the left-right direction, and 10 scale lines are drawn so as to be aligned in the left-right direction at 1-millimeter intervals. The lower translucent wall 4Ab, the lower reference line 45A, and the scale 46A serve as viewing windows for visually checking the amount of displacement of the ground mark F3 drawn on the upper surface of the column base foundation F1 through the lower wall 4A. By looking from above the column base alignment device 1 and comparing the centerlines of the lower reference line 45A and the scale 46, the worker can align the column base B with the column base foundation F1 while confirming that the column base alignment device 1 is being viewed from directly above (see Figure 14). The lower translucent wall 4Ab, the lower reference line 45A, and the scale 46 correspond to the ground mark measurement section of the present invention.

[0057] Therefore, by using the column base alignment device 1A, the worker can easily align the column base B with the foundation F without using a plumb bob, similar to the embodiment described above.

[0058] <Third Embodiment> Next, the column base alignment device 1B according to the third embodiment will be described with reference to Figures 15 and 16. Figure 15 is a perspective view of the column base alignment device 1B seen from the front at an oblique angle, and Figure 16 is a top view of the column base alignment device 1B. The column base alignment device 1B is made of resin and is integrally molded using additive manufacturing technology with a 3D printer.

[0059] The column base alignment device 1B mainly consists of an upper wall 2B, a vertical wall 3B, and a lower wall 4B. The lower wall 4B comprises a first lower wall 4Ba located at the lower end of the column base alignment device 1B, and a second lower wall 4Bb connected to the vertical wall 3B at a position above the first lower wall 4Ba. The upper wall 2B, the vertical wall 3B, the first lower wall 4Ba, and the second lower wall 4Bb are plate-like bodies.

[0060] The upper wall 2B has a notch 24 formed by an expanded section 34B, and an upper reference line 25B extending vertically is drawn in the notch 24. Therefore, the worker can easily attach the column base alignment device 1 to the base plate B2 while confirming that the upper reference line 25B drawn in the notch 24 and the marking line drawn on the column base B are aligned in a straight line.

[0061] The vertical wall 3B has a vertical slit 33B that extends in the vertical direction, and an expanding portion 34B located at the upper end of the vertical slit 33B that widens to the left and right as it extends upward. The vertical slit 33B extends from the upper end to the lower end of the vertical wall 3 and is a through-hole that penetrates the vertical wall 3 in the front-to-back direction. The vertical slit 33B serves as a viewing window for visualizing the amount of misalignment of the scribe line B3 drawn on the side surface B2d of the base plate B2 through the vertical wall 3B. The vertical slit 33B also has inclined surfaces 33B1 on both sides in the left-right direction, which incline forward as they approach the center in the left-right direction. Therefore, in alignment work of the column base B performed outdoors, it is possible to suppress the reduction in visibility of the scribe line B3 drawn on the base plate B2 due to sunlight irradiation.

[0062] The first lower wall 4Ba is connected to the lower end of the vertical wall 3. The first lower wall 4Ba has a first lower slit 44Ba extending in the front-rear direction, and a first lower reference line 45Ba and a scale 46Ba drawn on the upper surface 41 of the first lower wall 4Ba. The first lower slit 44Ba has larger dimensions than the second lower slit 44Bb, which will be described later. Therefore, the worker can check the positional misalignment of the ground mark F3 from above through the first lower slit 44Ba and the second lower slit 44Bb.

[0063] The first lower reference line 45Ba is drawn in the center of the first lower wall 4Ba in the left-right direction and extends between the front and rear ends of the first lower wall 4Ba. The scale marking 46Ba is drawn on a projection 48Ba that protrudes rearward from the second lower wall 4Bb (in the direction away from the vertical wall 3) (see Figure 16). The scale marking 46Ba is located in the center in the left-right direction, and 10 scale lines are drawn so that they are spaced 1 millimeter apart in the left-right direction.

[0064] The second lower wall 4Bb is connected to the vertical wall 3 at a position above the first lower wall 4Ba. The second lower wall 4Bb has a second lower slit 44Bb extending in the front-rear direction and a second lower reference line 45Bb drawn on its upper surface. The second lower slit 44Bb is located above the first lower slit 44Ba. Therefore, workers can confirm the amount of displacement of the ground mark F3 drawn on the upper surface of the column base foundation F1 via the first lower wall 4Ba and the second lower wall 4Bb. The second lower reference line 45Bb is drawn in the center of the second lower wall 4Bb in the left-right direction and extends between the front and rear ends of the second lower wall 4Bb.

[0065] As shown in Figure 16, the protruding portion 48Ba of the first lower wall 4Ba protrudes further back than the rear end of the second lower wall 4Bb (the end in the direction away from the vertical wall 3). Therefore, the worker can view the column base alignment device 1B from directly above and confirm that the second lower reference line 45Bb, the scale 46Ba, and the ground mark F3 are aligned in a straight line. This makes it possible to align the column base B with respect to the column base foundation F1 while confirming that the column base alignment device 1 is in the appropriate position relative to the column base foundation F1.

[0066] In the embodiment described above, it was explained that the scale 46Ba is drawn on the first lower wall 4Ba and the second lower reference line 45Bb is drawn on the second lower wall 4Bb, but this is not limited to this. The scale 46Ba may be drawn on the second lower wall 4Bb and the second lower reference line 45Bb may be drawn on the first lower wall 4Ba. Even in such a case, the worker can look at the column base alignment device 1B from directly above and confirm that the second lower reference line 45Bb, the scale 46Ba, and the ground mark F3 are aligned in a straight line. As a result, the worker can align the column base B with the column base foundation F1 while confirming from above whether the ground mark F3 is aligned in a straight line with the scale 46Ba, the first lower reference line 45Ba, and the second lower reference line 45Bb.

[0067] Furthermore, although the above-described embodiment was explained in which the upper wall 2 is attached to the base plate B2, the invention is not limited to this. A magnet may be provided on the back surface 32 of the vertical wall 3, and the column base alignment device 1 may be attached to the side surface B2d of the base plate B2 via the magnet. In this case, the magnet corresponds to the mounting part of the present invention. [Explanation of Symbols]

[0068] 1, 1A, 1B Column base alignment device 1Aa Main frame 2, 2A, 2B upper wall 21 Top side 22 Bottom side 23 Magnets 24 Notches 25A, 25B upper reference line 26A Mating part 3, 3A vertical wall 3Aa Vertical frame 3Ab Vertical translucent wall (marking line measurement area) 31 Front 32 Back 33, 33A, 33B Vertical slits (marking line measurement section) 33B1 Slope 34, 34B Expanded section (scribing line measurement section) 35A Vertical reference line (marking line measurement section) 35A1 Upper vertical reference line 35A2 Lower vertical reference line 4, 4A Lower wall 4Aa Lower frame 4Ab Lower translucent wall (ground marking measurement area) 41 Top side 42 Bottom surface 43 Front 44 Lower slit (ground marking measurement area) 45, 45A Lower reference line (ground marking measurement area) 451 First lower reference line 452 Second lower reference line 46A Scale (ground marking measurement section) 47A Mating part 4Ba First lower wall 44Ba First lower slit 45Ba first lower reference line 46Ba scale 48Ba protrusion 4Bb Second lower wall 44Bb Second lower slit 45Bb Second lower reference line 10 Position adjustment jig 11 Horizontal support 12 Vertical support 13 Position adjustment section 13a Extension member 13b Screw hole 13c Position adjustment bolt B Column base B1 pillar B2 Base Plate B2a Assembly hole B2c top surface B2d side view B3 Scribble lines F Foundation F1 column base foundation F1a Anchor Bolt F1b Column support F1c fastening nut F2 foundation beam F3 Ground Mark

Claims

1. A column base alignment device used to align the column base with respect to the foundation when fixing the column base to the foundation, A mounting portion attached to a base plate provided at the lower end of the column base, Connected to the aforementioned mounting portion, and a vertical wall facing the side wall of the base plate, It comprises a lower wall connected to the lower part of the vertical wall and facing the upper surface of the foundation, The vertical wall has a marking line measurement section that allows visual confirmation of the positional misalignment of the vertical wall with respect to marking lines drawn on the side wall of the base plate and extending in the vertical direction. The column base alignment device is characterized in that the lower wall has a ground marking measurement section that allows for visual confirmation of the positional misalignment of the lower wall with respect to a ground marking drawn on the foundation and extending in the front-to-back direction.

2. The column base alignment device according to claim 1, characterized in that the mounting portion is an upper wall that can be placed on the upper surface of the base plate.

3. The column base alignment device according to claim 2, characterized in that the upper wall has a magnet that adheres to the upper surface of the base plate.

4. The marking line measurement section has an elongated hole extending in the vertical direction, and an expanding section located at the upper end of the elongated hole that widens to the left and right as it extends upward. The column base alignment device according to claim 1, characterized in that the ground marking section has an elongated hole extending in the front-rear direction.

5. The aforementioned vertical wall comprises a vertical frame that forms the skeleton of the vertical wall, and a vertical translucent wall made of a translucent member that is attached to the vertical frame, The lower wall comprises a lower frame that forms the skeleton of the lower wall, and a lower translucent wall made of a translucent material and attached to the lower frame. The marking line measurement section has a vertical reference line drawn so as to extend vertically on the side surface of the vertical translucent wall facing the base plate, The column base alignment device according to claim 1, characterized in that the ground marking section has a lower reference line drawn on either the upper or lower surface of the lower translucent wall so as to extend in the front-to-back direction, and a scale drawn on the other surface.

6. The aforementioned vertical reference line comprises an upper vertical reference line drawn on the upper part of the vertical translucent wall and a lower vertical reference line drawn on the lower part of the vertical translucent wall. The column base alignment device according to claim 5, characterized in that the upper vertical reference line and the lower vertical reference line are drawn at equal positions in the left-right direction and are separated from each other in the vertical direction.

7. The vertical frame and the vertical translucent wall are synthetic resin molded bodies made of different materials. The column base alignment device according to claim 5, characterized in that the lower frame and the lower translucent wall are synthetic resin molded bodies made of different materials.

8. The lower wall comprises a first lower wall connected to the lower end of the vertical wall, and a second lower wall connected to the vertical wall above the first lower wall. The column base alignment device according to claim 1, characterized in that the first lower wall and the second lower wall are separated from each other in the vertical direction.

9. The column base alignment device according to claim 8, characterized in that the first lower wall has an extension portion that extends in a direction further away from the vertical wall than the second lower wall, and the ground marking measurement portion is provided on the extension portion.

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