Repair structure for support pillars of parking lot roofs and method for repairing support pillars of parking lot roofs

Abstract

This invention provides a repair structure for support columns of a parking lot roof that allows for repair of both the outer and inner surfaces of the support columns, thereby restoring the columns to sufficient strength. [Solution] A support column repair structure 7 in which damage to a metal support column 3 that supports a parking lot roof has been repaired, wherein the support column 3 has an open cross-sectional shape perpendicular to the height direction of the support column 3. At the location where the damage occurred in the height direction of the support column 3, metal reinforcing plates 22A and 22B are attached to at least the entire or substantially entire sides of both sides in the thickness direction of the support column component (flange portion 8, web portion 9).

Description

Technical Field

[0001] The present invention relates to a column repair structure for a parking lot roof that repairs columns with an open cross-sectional shape using attachment plates, and a method for repairing columns of a parking lot roof.

Background Art

[0002] In a parking lot for parking automobiles, a carport as described in Patent Document 1 may be installed. This carport includes a plurality of columns erected in the parking lot and a parking lot roof supported by these columns. The columns disclosed in Patent Document 1 are arranged at positions surrounding the parking space and are fixed to the ground with foundation concrete. As materials for columns for such a parking lot roof, generally, for good appearance, members with a closed cross-sectional shape such as round pipe materials with a circular cross-sectional shape perpendicular to the height direction of the column or square pipe materials with a square cross-sectional shape are used.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, if the columns for the parking lot roof are members with a closed cross-sectional shape, for example, when damage such as deformation occurs to the columns due to contact or collision with a car when the car enters or exits the parking lot, even if repairs can be made to the outside of the columns, it is difficult to repair the inside. Therefore, it is difficult to restore the columns to have sufficient strength.

[0005] The object of the present invention is to provide a support column repair structure for a parking lot roof and a support column repair method that allows for the repair of both the outer and inner surfaces of the support column, thereby restoring the support column to sufficient strength. [Means for solving the problem]

[0006] To achieve this objective, the support column repair structure for a parking lot roof according to the present invention is a support column repair structure in which damage to a metal support column supporting a parking lot roof is repaired, wherein the support column has an open cross-sectional shape perpendicular to the height direction of the support column, and a metal reinforcing plate is attached to at least the entire or substantially entire sides of both sides in the thickness direction of the support column component at the position where the damage occurred in the height direction of the support column.

[0007] The present invention relates to a support column repair structure for a parking lot roof, wherein the splice plate is made of the same metal material as the support column or a material with the same strength as or greater than the strength of the metal material, and the total area of ​​the cross-section of the splice plate perpendicular to the height direction of the support column may be greater than the area of ​​the cross-section of the support column perpendicular to the height direction at the location where the damage occurred to the support column.

[0008] The present invention relates to a support column repair structure for a parking lot roof, wherein the open cross-sectional shape of the support column has a bent portion that is bent at a right angle, and the reinforcing plate attached to the inside of the bent portion has a bent portion that coincides with the bent portion, and the angle of the bent portion provided on the reinforcing plate before it is attached to the support column is greater than the right angle, so that a load is applied from the reinforcing plate to the bent portion of the support column to make the angle of the bent portion greater than the right angle.

[0009] The present invention relates to a support column repair structure for a parking lot roof, wherein the splice plate is attached to the support column by bolts and nuts, and the splice plate may have a hole formed in it for inserting the shaft portion of the bolt before being attached to the support column.

[0010] In the present invention, in the support column repair structure for the roof of the parking lot, the splice plate is attached to the support column by bolts and nuts, and the bolts may be bolts with circular heads.

[0011] In the present invention, in the support column repair structure for the roof of the parking lot, the head of the bolt may be countersunk.

[0012] The present invention relates to a method for repairing support columns for a parking lot roof, which is a method for repairing damage to metal support columns that support a parking lot roof, wherein the support column has an open cross-sectional shape perpendicular to the height direction of the support column, and this open cross-sectional shape has a bent portion that is bent at a right angle, and the work of attaching a metal splice plate to the entire or substantially entire side surface in the thickness direction of the support column component at the location where the damage has occurred in the height direction of the support column, and the work of attaching the splice plate to the portion of the support column including the bent portion of the support column is characterized by including the steps of: manufacturing the splice plate that is to be placed inside the bent portion of the splice plate by providing the splice plate with a bent portion that has an angle greater than the right angle; and aligning the bent portion of the support column with the bent portion of the splice plate and attaching the splice plate to the inside of the bent portion of the support column, thereby applying a load from the splice plate to the bent portion of the support column to make the angle of the bent portion greater than the right angle.

[0013] The present invention relates to a method for repairing damage to a support column of a parking lot roof, wherein the support column has an open cross-sectional shape perpendicular to the height direction of the support column, and the method involves attaching a metal splice plate to the entire or substantially entire thickness direction of both sides of the support column component at the location where the damage occurs in the height direction of the support column, and the attachment work is characterized by including the steps of: making a hole in the splice plate for inserting the shaft portion of a bolt; fixing the splice plate placed on the support column in a position relative to the support column, then using the hole as a guide hole for a drilling tool to make a hole in the support column for inserting the shaft portion of the bolt; and inserting the shaft portion of the bolt through the hole in the splice plate and the hole in the support column, and screwing a nut onto the end of the shaft portion.

[0014] The present invention relates to a method for repairing the support columns of a parking lot roof, wherein the open cross-sectional shape includes a bent portion that is bent at a right angle, and the immobilization of the splice plate placed on the support column may be carried out by bringing the end of the splice plate into contact with the support column component that forms the bent portion.

[0015] (1) In the above invention, the support column may be made of steel, aluminum alloy, stainless steel, or other metal. (2) Furthermore, in the above invention, the open cross-sectional shape of the support column may be H-shaped, I-shaped, T-shaped, grooved, or grooved with a lip (C-shaped). That is, if the support column is made of steel, the support column may be H-shaped steel, I-shaped steel, T-shaped steel, channel steel, or channel steel with a lip (C-shaped steel). [Effects of the Invention]

[0016] According to the support column repair structure for parking lot roofs of the present invention, since the support column has an open cross-sectional shape perpendicular to the height direction of the support column, metal reinforcing plates can be attached to at least the entire or substantially entire sides of both sides in the thickness direction of the support column component. Therefore, it is possible to repair both the outside and inside of the support column with reinforcing plates, thereby restoring the strength of the support column to a sufficient level. In other words, even if damage occurs to a part of the support column due to deformation, etc., and this damage results in a loss of strength in the support column due to plastic deformation, etc., reinforcing plates can be attached to both sides of the entire or nearly entire thickness of the support column component. These reinforcing plates can adequately compensate for the loss of strength, and the support column can be given sufficient strength.

[0017] According to a method for repairing the support columns of a parking lot roof, in which a reinforcing plate having a bend greater than a right angle is attached to the inside of the bend of the support column so that the bend coincides with the bend of the support column, a load is applied from the reinforcing plate to the bend of the support column that makes the angle of this bend greater than a right angle. This load acts as a resistance force against deformation in the support column that reduces the angle of the bend of the support column, and therefore, such deformation can be effectively prevented from occurring in the support column.

[0018] According to a method for repairing support columns of a parking lot roof, in which a hole formed in the reinforcing plate is used as a guide hole for a drilling tool to create a hole in the support column, the work of creating a hole in the support column for inserting the shaft of a bolt can be easily performed. Furthermore, the process of creating holes in the support column for inserting the bolt shafts is carried out after the reinforcing plates placed on the support column are fixed in place relative to the column, thus allowing the holes to be made in the precise, predetermined positions on the support column. [Brief explanation of the drawing]

[0019] [Figure 1] Figure 1 is a perspective view of a carport to which the support column repair structure for parking lot roofs according to the present invention has been applied. [Figure 2] Figure 2 is a perspective view showing a magnified view of the main part. [Figure 3]Figure 3 is a cross-sectional view of the column repair structure. [Figure 4] Figure 4 is a cross-sectional view of the column. [Figure 5] Figure 5 is an exploded perspective view of the column repair structure. [Figure 6] Figure 6 is a front view of the flat attachment plate. [Figure 7] Figure 7 shows a groove-shaped attachment plate. (A) of the figure is a plan view and (B) of the figure is a side view. [Figure 8] Figure 8 is a cross-sectional view for comparing the cross-sectional areas of the column and the attachment plate. [Figure 9] Figure 9 is a flowchart for explaining the method of repairing the columns of the parking lot roof. [Figure 10] Figure 10 is a cross-sectional view for explaining the process of forming holes in the column. (A) of the figure shows the process of drilling holes in the flange portion, and (B) of the figure shows the process of drilling holes in the web portion. [Figure 11] Figure 11 is a cross-sectional view for explaining the process of attaching the attachment plate to the column. (A) of the figure shows the process of attaching the groove-shaped attachment plate to the web portion of the column, and (B) of the figure shows the process of attaching the flat attachment plate. [Figure 12] Figure 12 is a cross-sectional view of the column repair structure showing a modified example of the groove-shaped attachment plate. [Figure 13] Figure 13 is a cross-sectional view of the attachment plate showing a modified example of the groove-shaped attachment plate. [Figure 14] Figure 14 is a perspective view of the column repair structure showing a modified example of the bolt for attaching the attachment plate to the column. [Figure 15] Figure 15 shows a modified example of the bolt. (A) of the figure is a perspective view showing a bolt with a circular head, and (B) of the figure is a cross-sectional view showing a state where the attachment plate and the column are fastened using the bolt. [Figure 16] Figure 16 shows a modified example of the bolt. (A) of the figure is a perspective view showing a bolt with a circular head formed in a dish shape, and (B) of the figure is a cross-sectional view showing a state where the attachment plate and the column are fastened using the bolt.

Embodiments for Carrying Out the Invention

[0020] Hereinafter, an embodiment of the support column repair structure and support column repair method for a parking lot roof according to the present invention will be described in detail with reference to Figures 1 to 11. In this embodiment, an example of a support column repair structure and support column repair method for a carport equipped with support columns and a parking lot roof will be described.

[0021] (Description of carport) The carport 1 shown in Figure 1 consists of multiple support columns 3 erected in a parking lot 2 where cars (not shown) are parked, and a roof 4 for the parking lot supported by these support columns 3. The support columns 3 are fixed to a foundation concrete 6 embedded in the ground 5 and extend upward from the ground 5, and are positioned to surround the parking lot 2. The carport 1 shown in Figure 1 has support columns 3 at four locations: on both the left and right sides of the entrance side of the parking lot 2, and on both the left and right sides of the rear side.

[0022] Of the four support columns 3 shown in Figure 1, the two support columns 3 located on the entrance side of the carport 1 are to which the support column repair structure 7 according to the present invention is applied. The support column repair structure 7 will be described later. (Explanation of the support posts) The support column 3 has an open cross-sectional shape perpendicular to the height direction of the support column 3, and can be made of steel, aluminum alloy, stainless steel, or other metals. The open cross-sectional shape of the support column 3 may be H-shaped, I-shaped, T-shaped, grooved, or grooved with a lip (C-shaped). If the support column 3 is made of steel, it may be an H-shaped steel, an I-shaped steel, a T-shaped steel, a channel steel, or a channel steel with a lip (C-shaped steel).

[0023] The support column 3 used in this embodiment, as shown in Figure 4, has an H-shape, where the cross-sectional shape perpendicular to the height direction of the support column 3 is an open cross-sectional shape, and is made of an H-shaped steel consisting of two flange portions 8, 8 and a web portion 9 connecting the widthwise centers of these flange portions 8. These flange portions 8 and web portion 9 constitute the support column component 10. The point where the flange portion 8 and the web portion 9 are connected is the bent portion 11 of the support column 3, and the angle α between the flange portion 8 and the web portion 9 at this bent portion 11 is a right angle (90 degrees). The support column 3, which has an H-shaped cross-section, has four bent portions 11. As shown in Figure 1, the support column 3 is installed with its flange portion 8 extending in both the left-right and up-down directions of the carport 1.

[0024] (Explanation of parking lot roofs) As shown in Figure 1, the parking lot roof 4, supported by the pillars 3, has a framework 14 that includes two purlins 12 attached to the upper ends of the pillars 3 and extending in the left-right direction of the carport 1, and a plurality of rafters 13 placed on top of these purlins 12 and extending in the front-rear direction of the carport 1. The purlins 12 are spanned between the upper ends of the left pillar 3 and the right pillar 3 of the carport 1. A plurality of roof panels 15 are installed on top of the rafters 13.

[0025] (Explanation of the support column repair structure) When driving a car into carport 1, the car body may accidentally come into contact with the support column 3. When the car body comes into contact with the support column 3, which has an H-shaped cross-section, the flange portion 8 is often dented and damaged. For example, as shown by the dashed line A in Figures 4 and 5, a part of the flange portion 8 of the support column 3 may deform. If the deformation of the support column 3 is large, although not shown in the figures, the flange portion 8 is repaired to be flat using a tool such as a hammer, and then the repair work using a metal splice plate, as described later, is performed. In Figure 5, the location where the damage occurred is indicated by reference numeral 21, and this location 21 is hatched downwards to the left. This location 21 undergoes work hardening as it is plastically deformed by contact with the car and then returns to its original shape. In other words, there is a loss of strength in the support column 3 after the repair.

[0026] By applying the parking lot roof support column repair structure 7 according to the present invention to the damaged location 21, the strength of the repaired portion can be restored to a sufficient level. In this embodiment, the support column repair structure 7 for a parking lot roof has a structure in which, as shown in Figure 3, a metal reinforcing plate 22 is attached to at least the entire or substantially entire thickness of both sides of the support column component 10 (flange portion 8 and web portion 9) at the position 21 in the height direction of the support column 3 where the damage occurred.

[0027] Even if deformation or other damage occurs only to a portion of the two flange portions 8 and web portion 9 of the support column 3, the reinforcing plate 22 is also placed on both sides in the thickness direction of all of these flange portions 8 and web portion 9. In the portions of the flange portion 8 to which the reinforcing plate 22 is attached and in the portions of the web portion 9 to which the reinforcing plate 22 is attached, multiple bolt insertion holes 23, 24 (see Figure 5) are drilled in each, respectively. Before the reinforcing plate 22 is attached to the support column 3 with bolts and nuts as described later. The holes 23, 24 in the support column 3 are formed by a worker (not shown) performing a drilling operation, for example, using a drill. The location of drilling the holes 23, 24 in the support column 3 will be described later.

[0028] The two sides in the thickness direction of the flange portion 8 to which the reinforcing plate 22 is attached are, as shown in Figure 4, the outer surface 8a located on the opposite side of the web portion 9 of the flange portion 8, and the inner surface 8b connected to the web portion 9 of the flange portion 8. The reinforcing plate 22 can also be formed to cover both end faces 8c in the width direction of the flange portion 8 (a direction perpendicular to the height direction of the support column 3 and also perpendicular to the web portion 9). The two sides in the thickness direction of the web portion 9 to which the reinforcing plate 22 is attached are one side 9a and the other side 9b of the web portion 9.

[0029] (Explanation of the support plate) The reinforcing plate 22 attached to the outer surface 8a of the flange portion 8 of the support column 3 is formed in the shape of a flat plate from a steel plate. Hereinafter, this reinforcing plate 22 will be referred to as the flat reinforcing plate 22A. The reinforcing plate 22 attached to the inner surface 8b of the flange portion 8 of the support column 3 also serves as the reinforcing plate 22 attached to the web portion 9 of the support column 3, and is formed from steel plate into a groove shape in cross-section. Hereinafter, this reinforcing plate 22 will be referred to as the groove-shaped reinforcing plate 22B. As shown in Figures 2 and 3, the flat reinforcing plate 22A is attached to the flange portion 8 by multiple bolts 25 and nuts 26. Multiple flat washers 27 and spring washers 28 are used in the fastening portion including the bolts 25 and nuts 26, as is well known in the conventional method.

[0030] As shown in Figure 6, the flat reinforcing plate 22A is a steel plate with a rectangular main surface. Before being attached to the support column 3, the flat reinforcing plate 22A has holes 29 formed in it for inserting the shaft portion 25a (see Figure 3) of the bolt 25. These holes 29 are formed at one end and the other end of the flat reinforcing plate 22A in the width direction, and are also formed at positions that are spaced at regular intervals along the longitudinal direction of the flat reinforcing plate 22A (the height direction of the support column 3). In this embodiment, the flat reinforcing plate 22A has eight holes 29 formed in it. Two holes 29, which are aligned in the width direction of the flat reinforcing plate 22A, are formed at a predetermined distance from, for example, the center of the reinforcing plate 22A in the width direction. These holes 29 are formed in advance at predetermined positions by machining during the manufacturing process of the flat reinforcing plate 22A.

[0031] As shown in Figures 7(A) and 7(B), the grooved reinforcing plate 22B is composed of two flange portions 31 and a web portion 32 connecting one end of these flange portions 31. Figure 7(A) is a plan view of the grooved reinforcing plate 22B as seen from the longitudinal direction, and Figure 7(B) is a side view of the grooved reinforcing plate 22B. This grooved reinforcing plate 22B can be made, for example, from a bent steel plate. This grooved reinforcing plate 22B and the aforementioned flat reinforcing plate 22A are made from the same metal material as the support column 3, or from a material with the same strength as or greater than this metal material. The flange portion 31 and web portion 32 of the groove-shaped reinforcing plate 22B, prior to being attached to the support column 3, each have multiple holes 33 and 34 for inserting bolts. These holes 33 and 34 are pre-formed at specified positions by machining during the manufacturing process of the groove-shaped reinforcing plate 22B.

[0032] As shown in Figure 3, the groove-shaped reinforcing plate 22B in this embodiment is configured to fit between the two flange portions 8 of the support column 3, and a bent portion 35 is provided at a location that coincides with the bent portion 11 of the support column 3. Figure 3 is a cross-sectional view when the support column 3, the flat reinforcing plate 22A, and the groove-shaped reinforcing plate 22B are cut by a virtual plane B perpendicular to the height direction of the support column 3 in Figure 2. The virtual plane B is hatched downwards to the left. The position of the virtual plane B in the height direction is the position 21 where the damage to the support column 3 occurred, and is a position that does not cross the bolt 25 that fixes the flat reinforcing plate 22A to the support column 3. Since the bent portion 35 of the groove-shaped reinforcing plate 22B coincides with the bent portion 11 of the support column 3 and is positioned on both sides in the thickness direction of the web portion 9, it is positioned inside the bent portion 11 of the support column 3.

[0033] As shown in Figures 3 and 5, the web portion 32 of the groove-shaped reinforcing plate 22B is superimposed on the web portion 9 of the support column 3, and together with the web portions 32 of other groove-shaped reinforcing plates 22B adjacent to the web portion 9, it is attached to the web portion 9 of the support column 3 by bolts 36 and nuts 37. Multiple flat washers 27 and spring washers 28 are also used in the fastening portion including the bolts 36 and nuts 37. The shaft portion 36a of the bolt 36 that attaches the web portion 32 of the groove-shaped reinforcing plate 22B to the support column 3 is passed through holes 34 formed in the web portions 32 of both reinforcing plates 22B and holes 24 formed in the web portion 9 of the support column 3.

[0034] The flange portion 31 of the groove-shaped reinforcing plate 22B is superimposed on the inner surface 8b of the flange portion 8 of the support column 3, and together with the flat plate-shaped reinforcing plate 22A superimposed on the outer surface 8a of the flange portion 8 of the support column 3, it is attached to the flange portion 8 of the support column 3 by bolts 25 and nuts 26. The shaft portion 25a of this bolt 25 passes through the hole 29 formed in the flat plate-shaped reinforcing plate 22A, the hole 23 formed in the flange portion 8 of the support column 3, and the hole 33 formed in the flange portion 31 of the groove-shaped reinforcing plate 22B. In other words, when the flat plate-shaped reinforcing plate 22A is superimposed on the flange portion 8 of the support column 3 with its widthwise center aligned, and the web portion 32 of the groove-shaped reinforcing plate 22B is superimposed on the web portion 9 of the support column 3, the hole 29 of the flat plate-shaped reinforcing plate 22A and the hole 33 formed in the flange portion 31 of the groove-shaped reinforcing plate 22B can be positioned on the same axis.

[0035] As shown in Figure 7(A), the angle β (the angle between the flange portion 31 and the web portion 32) of the bent portion 35 provided on the groove-shaped reinforcing plate 22B before it is attached to the support column 3 is greater than a right angle. In Figures 7(A) and (B), angle β is drawn larger than it actually is to make it easier to understand that angle β is greater than a right angle. Angle β is set to an angle at which the flange portion 31 can be elastically deformed relative to the web portion 32 when the groove-shaped reinforcing plate 22B is inserted inside the bent portion 11 of the support column 3, but does not undergo plastic deformation. By attaching the groove-shaped reinforcing plate 22B, formed in this manner, to the support column 3, an expanding load acts from the reinforcing plate 22B to the bent portion 11 of the support column 3, as indicated by the arrow F in Figure 3, which attempts to increase the angle of the bent portion 11 to more than 90 degrees.

[0036] By attaching the flat reinforcing plate 22A and the grooved reinforcing plate 22B to the support column 3, the location 21 where the damage to the support column 3 occurred is surrounded by the flat reinforcing plate 22A and the grooved reinforcing plate 22B, as shown in Figure 3. The total area of ​​the cross-sections of the flat reinforcing plate 22A and the grooved reinforcing plate 22B perpendicular to the height direction of the support column 3 is larger than the area of ​​the cross-section of the support column 3 perpendicular to the height direction at the location 21 where the damage to the support column 3 occurred. Note that the total cross-sectional area of ​​the flat reinforcing plate 22A and the grooved reinforcing plate 22B mentioned above is the total cross-sectional area of ​​the parts where holes 29, 33, and 34 for passing bolts 25 and 36 are not formed. The total area of ​​the cross-sections perpendicular to the height direction of the support column 3 for the flat reinforcing plate 22A and the grooved reinforcing plate 22B is the area of ​​the portion shown with a downward-sloping hatch in Figure 8. Furthermore, the area of ​​the cross-section perpendicular to the height direction of the support column 3 at the location 21 where the damage to the support column 3 occurred is the area of ​​the portion shown with a downward-sloping hatch in Figure 8, and this area is the area where the holes 23 and 24 for passing the bolts 25 and 36 are not formed.

[0037] (Explanation of how to repair the support pillars for a parking lot roof) Next, the method for repairing the support columns of a parking lot roof according to the present invention will be explained using the flowchart shown in Figure 9. As described above, the method for repairing the support columns of a parking lot roof according to the present invention is carried out by performing the installation of a splice plate shown in step S1 of Figure 9 on the support column 3 after the repair of flattening the flange portion 8 with a tool such as a hammer has been completed when the deformation of the support column 3 is large. The installation of the splice plate is the work of attaching the splice plate 22 to the support column 3 and includes a splice plate manufacturing process (step S2), a drilling process for the support column 3 (step S3), and a splice plate installation process (step S4).

[0038] The splice plate manufacturing process (step S2) is a process for manufacturing a splice plate 22 that conforms to the size of the location 21 where the support column 3 was damaged, and includes a manufacturing process for a flat splice plate 22A (step S2A) and a manufacturing process for a grooved splice plate 22B (step S2B). In the manufacturing process of the flat reinforcing plate 22A (step S2A), although not shown in the diagram, the flat reinforcing plate 22A is punched out from a steel plate which serves as the base material for the reinforcing plate 22A. During this punching process, holes 29 for inserting bolts are drilled (step S2Aa).

[0039] In the manufacturing process of the groove-shaped reinforcing plate 22B (step S2B), although not shown in the diagram, a flat plate that will become the groove-shaped reinforcing plate 22B is punched out from a steel plate that will serve as the base material for the reinforcing plate 22B. During this punching process, holes 33 and 34 for inserting bolts are drilled (step S2Ba). Subsequently, the punched flat plate is subjected to, for example, press processing to create bent portions 35 on both sides of the flat plate that are at an angle greater than a right angle (step S2Bb), thereby manufacturing the groove-shaped reinforcing plate 22B.

[0040] In the drilling process S3 for the support column 3, the process of forming a hole 23 in the flange portion 8 of the support column 3 (step S3A) and the process of forming a hole 24 in the web portion 9 of the support column 3 (step S3B) are performed. The process of forming a hole 23 in the flange portion 8 of the support column 3 (step S3A) is performed as shown in Figure 10(A), and the process of forming a hole 24 in the web portion 9 of the support column 3 (step S3B) is performed as shown in Figure 10(B). Figure 10(A) is a cross-sectional view of the support column 3 and a flat reinforcing plate 22A to illustrate the process of forming a hole 23 in the flange portion 8 of the support column 3, and Figure 10(B) is a cross-sectional view of the support column 3 and a groove-shaped reinforcing plate 22B to illustrate the process of forming a hole 24 in the web portion 9 of the support column 3.

[0041] As shown in Figure 10(A), the hole 23 in the flange portion 8 of the support column 3 is formed by placing a flat reinforcing plate 22A on the flange portion 8 of the support column 3, fixing the reinforcing plate 22A in place relative to the support column 3, and then using a hole-punching tool 41. The flat reinforcing plate 22A is positioned at the same height as the location 21 where the damage to the support column 3 occurred. To fix the reinforcing plate 22A in place relative to the support column 3, for example, by clamping the reinforcing plate 22A and the flange portion 8 of the support column 3 with a tool 42 such as a clamp.

[0042] The drilling tool 41 can be, for example, a drill. When drilling with the drilling tool 41, the hole 29 in the flat reinforcing plate 22A can be used as a guide hole for the drilling tool 41. The drilling of holes in the flange portion 8 of the support column 3 is performed by stacking flat reinforcing plates 22A on each of the two flange portions 8 to immobilize them, and using all the holes 29 provided in these reinforcing plates 22A as guide holes. The two flat reinforcing plates 22A are fixed to the support column 3 at the same height.

[0043] As shown in Figure 10(B), the holes 24 in the web portion 9 of the support column 3 are formed by overlapping a groove-shaped reinforcing plate 22B onto, for example, one side 9a of the web portion 9 of the support column 3, fixing the reinforcing plate 22B in place relative to the support column 3, and then using a hole-punching tool 41. In performing this operation, the holes 33 formed in the flange portion 31 of the groove-shaped reinforcing plate 22B are overlapped with the holes 23 formed in the flange portion 8 of the support column 3, and these holes are positioned on the same axis. The operation of overlapping the groove-shaped reinforcing plate 22B onto the web portion 9 of the support column 3 is performed by press-fitting the reinforcing plate 22B between the two flange portions 8 of the support column 3, since the angle of the bent portions 35 provided at both ends of the groove-shaped reinforcing plate 22B is greater than a right angle, thereby bending the flange portion 31 of the reinforcing plate 22B.

[0044] To immobilize the groove-shaped reinforcing plate 22B relative to the support column 3, the flange portion 8 of the support column 3 and the flange portion 31 of the groove-shaped reinforcing plate 22B can be clamped together using a tool 42, such as a clamp. The drilling tool 41 can be a drill, for example. Immobilizing the groove-shaped reinforcing plate 22B placed on the support column 3 can also be done without using a tool 42. That is, the end of the groove-shaped reinforcing plate 22B is pressed against the flange portion 8 (support column component 10) that forms the bent portion 11 of the support column 3, and the groove-shaped reinforcing plate 22B is fixed to the support column 3 by frictional resistance. The drilling operation in the web portion 9 of the support column 3 can also be performed by using all the holes 34 formed in the web portion 32 of the groove-shaped reinforcing plate 22B as guide holes for the drilling tool 41. After holes 23 and 24 are formed in the flange portion 8 and web portion 9 of the support column 3 in this manner, the splice plate attachment process (step S4) is carried out.

[0045] The reinforcing plate attachment process (step S4) can be carried out by, for example, attaching a groove-shaped reinforcing plate 22B to the support column 3 (step S4A) as shown in Figure 11(A), and attaching a flat plate-shaped reinforcing plate 22A to the support column 3 (step S4B) as shown in Figure 11(B). Figure 11(A) is a cross-sectional view of the main part illustrating the process of attaching the groove-shaped reinforcing plate 22B to the support column 3, and Figure 11(B) is a cross-sectional view of the main part illustrating the process of attaching the flat plate-shaped reinforcing plate 22A to the support column 3.

[0046] To attach the groove-shaped reinforcing plate 22B to the support column 3, first, as shown in Figure 11(A), the groove-shaped reinforcing plates 22B are placed on both sides of the web portion 9 of the support column 3. The groove-shaped reinforcing plate 22B that was placed on one side 9a of the web portion 9 during the hole-drilling process S3B of the web of the support column 3 can be used without being removed from the web portion 9. Therefore, in this process, a new groove-shaped reinforcing plate 22B is attached to the other side 9b of the web portion 9. In this new groove-shaped reinforcing plate 22B as well, the angles of the bent portions 35 provided at both ends are greater than right angles, so these bent portions 35 are press-fitted between the two flange portions 8 of the support column 3, and this reinforcing plate 22B is placed on the web portion 9. This new groove-shaped reinforcing plate 22B can also be positioned on the web portion 9 of the support column 3 in a fixed state in the direction of the two flange portions 8, by having both ends abut against the flange portions 8, which are part of the support column component 10 that form the bent portion 11 of the support column 3. In other words, this new groove-shaped reinforcing plate 22B can also be installed on the support column 3 in a fixed state without using tools 42 such as clamps.

[0047] After placing groove-shaped reinforcing plates 22B on both sides 9a and 9b of the web portion 9 of the support column 3 in this manner, the shaft portion 36a of a bolt 36 is inserted through the holes 34 provided in the web portions 32 of the two groove-shaped reinforcing plates 22B and the hole 24 provided in the web portion 9 of the support column 3, and a nut 37 is screwed onto the end of the shaft portion 36a to fasten the bolt 36 and nut 37 (step S4Aa). That is, the bent portion 11 of the support column 3 and the bent portion 35 of the groove-shaped reinforcing plate 22B are aligned, and the reinforcing plate 22B is attached to the inside of the bent portion 11 of the support column 3. By attaching the two groove-shaped reinforcing plates 22B to the support column 3 in this manner, an expanding load F can be applied from the reinforcing plates 22B to each of the bent portions 11 of the support column 3 to make the angle of these bent portions 11 greater than a right angle (step S4Ab).

[0048] To attach the flat reinforcing plate 22A to the support column 3, as shown in Figure 11(B), the flat reinforcing plate 22A is placed on top of the flange portion 8 of the support column 3. Then, the shaft portion 25a of the bolt 25 is inserted through the hole 29 provided in the reinforcing plate 22A, the hole 23 provided in the flange portion 8, and the hole 33 provided in the flange portion 31 of the groove-shaped reinforcing plate 22B. A nut 26 is then screwed onto the end of the shaft portion 25a to fasten the bolt 25 and nut 26 together (step S4Ba). By attaching the groove-shaped reinforcing plate 22B and the flat reinforcing plate 22A to the support column 3 in this manner, all steps of the repair method for the support column of the parking lot roof are completed.

[0049] After the flat reinforcing plate 22A and the grooved reinforcing plate 22B are placed on both sides in the thickness direction of the web portion 9 and each flange portion 8 of the support column 3 and attached to the support column 3 with bolts 25, 36 and nuts 26, 37, the two grooved reinforcing plates 22B placed on both sides in the thickness direction of the web portion 9 have both ends formed in advance as bent portions 35 at an angle greater than a right angle, and are therefore press-fitted between the two flange portions 8.

[0050] Therefore, an expanding load F (see Figure 3) acts on the flange portion 8, which is part of the support column structure 10, causing the angle between the flange portion 8 and the web portion 9 to be 90 degrees or more. As a result, this expanding load F acts as a resistance force against deformation in the support column 3 that reduces the angle of the bent portion 11 of the support column 3 due to contact with a vehicle or the like, and thus effectively prevents such deformation from occurring in the support column 3.

[0051] (Explanation of the effects according to the embodiment) In the support column repair structure 7 for a parking lot roof according to this embodiment, the support column 3 has an open cross-sectional shape perpendicular to the height direction of the support column 3, so that metal reinforcing plates 22 can be attached to at least the entire or substantially entire sides of both sides in the thickness direction of the support column component 10. Therefore, it is possible to repair both the outside and inside of the support column 3 with reinforcing plates 22, thereby restoring the strength of the support column 3 to a sufficient level. In other words, even if damage occurs to a part of the support column 3 due to deformation, etc., and this damage causes a loss of strength in the support column 3 due to plastic deformation, etc., since reinforcing plates 22 can be attached to both sides in the thickness direction of the entire or substantially entire support column component 10, these reinforcing plates 22 can sufficiently compensate for the loss of strength, and the support column 3 can be given sufficient strength.

[0052] The flat reinforcing plate 22A and the grooved reinforcing plate 22B in this embodiment are made of the same metal material as the support column 3, or a material with the same strength as or greater than the strength of this metal material. The total area of ​​the cross-sections of these reinforcing plates 22A and 22B perpendicular to the height direction of the support column 3 is larger than the area of ​​the cross-section perpendicular to the height direction of the support column 3 at the location 21 where the damage to the support column 3 occurred. Therefore, the support column 3 can be given greater strength than before the damage occurred.

[0053] Furthermore, in this embodiment, even if damage such as deformation of the support column 3 occurs only to a part of the two flange portions 8 and web portion 9, the reinforcing plates 22 are also placed on both sides in the thickness direction of all of these flange portions 8 and web portion 9. Therefore, even if a part of the support column 3 experiences strength loss due to plastic deformation or the like due to damage, by attaching the flat reinforcing plate 22A and the grooved reinforcing plate 22B, which are reinforcing members, to both sides in the thickness direction of the entire or substantially entire support column 3, the strength loss can be sufficiently compensated by these reinforcing plates 22A and 22B, and sufficient strength can be provided to the support column 3.

[0054] The open cross-sectional shape of the support column 3 in this embodiment includes a bent portion 11 that is bent at a right angle. The groove-shaped reinforcing plate 22B attached to the inside of this bent portion 11 has a bent portion 35 provided at a location that coincides with the bent portion 11 of the support column 3. Because the angle of the bent portion 35 provided on the groove-shaped reinforcing plate 22B before it is attached to the support column 3 is greater than a right angle, a load (expansion load F) acts from the reinforcing plate 22B to the bent portion 11 of the support column 3 to make the angle of this bent portion 11 greater than a right angle. This load acts as a resistance force against deformation in the support column 3 that reduces the angle of the bent portion 11 of the support column 3, and thus effectively prevents such deformation from occurring in the support column 3.

[0055] In this embodiment, the flat reinforcing plate 22A and the grooved reinforcing plate 22B are attached to the support column 3 by bolts 25, 36 and nuts 26, 37. Before being attached to the support column 3, the flat reinforcing plate 22A and the grooved reinforcing plate 22B have holes 29, 33, and 34 formed in them for inserting the shafts 25a and 36a of the bolts 25 and 36. Therefore, the process of forming holes 23 and 24 in the support column 3 for passing the shafts 25a and 36a of the bolts 25 and 36 can be carried out by using the pre-made holes 29 and 34 in the flat reinforcing plate 22A and the grooved reinforcing plate 22B as guide holes for the drilling tool 41, thus allowing the holes 23 and 24 in the support column 3 to be drilled in the correct position easily.

[0056] In this embodiment of the method for repairing the support columns of a parking lot roof, the work for attaching the flat reinforcing plate 22A and the groove-shaped reinforcing plate 22B to the support column 3 includes the step of manufacturing the groove-shaped reinforcing plate 22B, which is positioned on the inside of the bent portion 11, by providing a bent portion 35 in the reinforcing plate 22B that is at an angle greater than a right angle (step S2Bb), and the step of aligning the bent portion 11 of the support column 3 with the bent portion 35 of the groove-shaped reinforcing plate 22B and attaching the reinforcing plate 22B to the inside of the bent portion 11 of the support column 3, thereby applying a load (expansion load F) from the reinforcing plate 22B to the bent portion 11 of the support column 3 to make the angle of the bent portion 11 greater than a right angle (step S4Ab). Therefore, an expanding load F acts from the groove-shaped reinforcing plate 22B to the bent portion 11 of the support column 3, causing the angle of this bent portion 11 to be greater than a right angle. This expanding load F acts as a resistance force against deformation in the support column 3 that would reduce the angle of the bent portion 11 of the support column 3, and thus effectively prevents such deformation from occurring in the support column 3.

[0057] In this embodiment of the method for repairing the support columns of a parking lot roof, the work of attaching the reinforcing plate 22 to the support column 3 involves the steps of providing holes 29, 33, and 34 in the reinforcing plate 22 for inserting the shafts 25a and 36a of bolts 25 and 36 (steps S2Aa and S2Ba), and then fixing the reinforcing plates 22A and 22B that have been placed on the support column 3 in place, and then using the holes 29 and 34 in the reinforcing plates 22A and 22B as guide holes for the drilling tool 41, and then attaching the reinforcing plate 22A and 22B to the support column 3 The process includes the steps of creating holes 23 and 24 for inserting the shaft portions 25a and 36a of bolts 25 and 36 using a hole-punching tool 41 (steps S3A and S3B), and inserting the shaft portions 25a and 36a of bolts 25 and 36 through holes 29, 33 and 34 made in the reinforcing plates 22A and 22B and holes 23 and 24 made in the support column 3, and screwing nuts 26 and 37 onto the ends of these shaft portions 25a and 36a (steps S4Aa and S4Ba).

[0058] The holes 29 and 34 provided in the reinforcing plates 22A and 22B are used as guide holes for the drilling tool 41. When the drilling tool 41 is used to create holes 23 and 24 in the flange portions 8 and web portions 9 of the support column 3 for inserting the shaft portions 25a and 36a of the bolts 25 and 36, the reinforcing plates 22A and 22B are fixed in an immovable state to the flange portions 8 and web portions 9 by a tool 42 such as a clamp. This allows the drilling tool 41 to perform the work of creating holes 23 and 24 in each flange portion 8 and web portion 9 for inserting the shaft portions 25a and 36a of the bolts 25 and 36, as an accurate operation of creating holes in predetermined positions on the support column 3.

[0059] The open cross-sectional shape of the support column 3 in this embodiment includes a bent portion 11 that is bent at a right angle. To immobilize the groove-shaped reinforcing plate 22B placed on the support column 3, the end of the groove-shaped reinforcing plate 22B is brought into contact with the support column component 10 (flange portion 8) that forms the bent portion 11. Therefore, it becomes possible to immobilize the groove-shaped reinforcing plate 22B on the support column 3 without using a tool 42 to hold the groove-shaped reinforcing plate 22B in an immobile state.

[0060] (A variation of the support plate) The reinforcing plates 22, which are positioned on both sides in the thickness direction of the web portion 9 of the support column 3, can be formed as shown in Figures 12 and 13. In Figures 12 and 13, the same or equivalent members as those described in Figures 1 to 11 are denoted by the same reference numerals, and detailed explanations are omitted as appropriate.

[0061] As shown in Figure 12, the web portion 9 of the support column 3 is fitted with a groove-shaped reinforcing plate 22C, which has a shorter flange portion 31 (shallower groove) compared to the groove-shaped reinforcing plate 22B shown in Figure 7. As shown in Figure 13, in this reinforcing plate 22C as well, the bent portions 35 at both ends are bent at an angle β greater than a right angle. This angle β is also set so that when the groove-shaped reinforcing plate 22C is inserted inside the bent portion 11 of the support column 3, the flange portion 31 can be elastically deformed relative to the web portion 32, but does not undergo plastic deformation.

[0062] Furthermore, a flat reinforcing plate 22D, which is narrower in width than the flat reinforcing plate 22A attached to the outer surface 8a, is attached to the inner surface 8b of the flange portion 8 of the support column 3 together with the flat reinforcing plate 22A by bolts 25 and nuts 26. Even when using the groove-shaped reinforcing plate 22C shown in Figures 12 and 13, an expansion load F acts from the groove-shaped reinforcing plate 22C to the bent portion 11 of the support column 3, similar to when adopting the configuration shown in Figures 1 to 11, causing the angle of the bent portion 11 to be greater than a right angle. This expansion load F acts as a resistance force against deformation in the support column 3 that reduces the angle of the bent portion 11, and thus effectively prevents such deformation from occurring in the support column 3.

[0063] (A variation of the bolt) The bolts used to attach the flat reinforcing plate 22A and the grooved reinforcing plates 22B and 22C to the support column 3 are those shown in Figures 14 to 16. In these figures, the same reference numerals are used for members that are the same as or equivalent to those described in Figures 1 to 13, and detailed explanations are omitted as appropriate. The flat reinforcing plate 22A and the grooved reinforcing plate 22B shown in Figure 14 are attached to the support column 3 using bolts 52 with circular heads 51. As shown in Figures 15(A) and (B), these bolts 52 have a hexagonal socket 53 and a circular head 51. Figure 15(A) is a perspective view of the bolt 52 with a circular head 51, and Figure 15(B) is a cross-sectional view showing the reinforcing plate 22 and the support column 3 fastened together using the bolts 52. By using bolts 52 with a circular head 51, compared to using bolts with hexagonal heads (bolts 25, 36), clothing is less likely to get caught when car occupants pass near the repaired area in parking lot 2. This reduces the impact on people entering and exiting parking lot 2.

[0064] Furthermore, in order to attach the flat reinforcing plate 22A and the grooved reinforcing plate 22B to the support column 3, bolts 55 having a hexagonal socket 53 and a round, countersunk head 54 can be used, as shown in Figures 16(A) and (B). Figure 16(A) is a perspective view of a bolt 55 with a countersunk head 54, and Figure 16(B) is a cross-sectional view showing the state in which the reinforcing plate 22 and the support column 3 are fastened using the bolt 55. When a countersunk bolt 55 is used for the head 54, as shown in Figure 16(B), a countersunk 56 is provided in the holes 29 and 34 of the reinforcing plates 22A, 22B, and 22C to accommodate the tapered portion 54a of the head 54. By using a bolt 55 with a countersunk head 54, the amount by which the head 54 protrudes from the surface of the support column 3 can be reduced compared to a bolt 52 with a circular head 51 shown in Figures 15(A) and (B). This further reduces the impact on people entering and exiting the parking lot 2. [Industrial applicability]

[0065] This invention can be used to repair the support columns that support the roof of a parking area in a simple garage such as a carport. [Explanation of symbols]

[0066] 1...Carport, 3...Support column, 4...Roof for parking lot, 7...Support column repair structure, 8...Flange section, 9...Web section, 10...Support column component, 11...Bend section, 21...Location where damage occurred, 22...Reinforcement plate, 22A...Flat reinforcement plate, 22B...Groove-shaped reinforcement plate, 23,24,29,33,34...Hole, 25,36,52,55...Bolt, 26,37...Nut, 51,54...Head, S2...Process for manufacturing the reinforcement plate, S2Aa,S2Ba...Process for making holes in the reinforcement plate, S3A,S3B...Process for making holes in the support column, S4Aa,S4Ba...Process for screwing in the nut, S4Ab...Process for applying load.

Claims

1. A support structure in which damage to metal support columns that support a parking lot roof has been repaired, The aforementioned support column has an open cross-sectional shape perpendicular to the height direction of the column. A repair structure for a support column of a parking lot roof, characterized in that, in the height direction of the support column, a metal reinforcing plate is attached to at least the entire or substantially entire thickness direction of both sides of the support column component at the location where the damage occurred.

2. In the support column repair structure for a parking lot roof described in claim 1, The aforementioned reinforcing plate is formed from the same metal material as the aforementioned support column, or from a material having the same strength as or greater than the strength of this metal material. A support column repair structure for a parking lot roof, characterized in that the total area of ​​the reinforcing plate perpendicular to the height direction of the support column is greater than the area of ​​the cross-section perpendicular to the height direction of the support column at the location where the damage occurred.

3. In the support column repair structure for a parking lot roof described in claim 1, The open cross-sectional shape of the support column has a bent portion that is bent at a right angle. The reinforcing plate attached to the inside of the bent portion has a bent portion provided at a location that coincides with the bent portion. A support column repair structure for a parking lot roof, characterized in that the angle of the bent portion provided on the reinforcing plate before it is attached to the support column is greater than the right angle, thereby causing a load to be applied from the reinforcing plate to the bent portion of the support column, thereby increasing the angle of the bent portion to greater than the right angle.

4. In the support column repair structure for a parking lot roof described in claim 1, The aforementioned reinforcing plate is attached to the support column by bolts and nuts. A support column repair structure for a parking lot roof, characterized in that the reinforcing plate, before being attached to the support column, has a hole formed in it for inserting the shaft portion of the bolt.

5. In the support column repair structure for a parking lot roof described in claim 1, The aforementioned reinforcing plate is attached to the support column by bolts and nuts. The aforementioned bolt is a bolt with a circular head, and is a support column repair structure for a parking lot roof.

6. In the support column repair structure for a parking lot roof described in claim 5, A support column repair structure for a parking lot roof, characterized in that the head of the bolt is countersunk.

7. A method for repairing damage to metal support columns that support a parking lot roof, The aforementioned support column has an open cross-sectional shape perpendicular to its height direction, and this open cross-sectional shape has a bent portion that is bent at a right angle. In the height direction of the support column, at the location where the damage has occurred, a metal reinforcing plate is attached to the entire or substantially entire thickness direction of both sides of the support column component. Of the aforementioned installation work, the work of attaching the reinforcing plate to the portion of the support column including the bent portion is, The process of manufacturing the reinforcing plate, which is positioned on the inside of the bent portion, by providing the reinforcing plate with a bent portion that has an angle greater than the right angle, The process involves aligning the bent portion of the support column with the bent portion of the reinforcing plate, and attaching the reinforcing plate to the inside of the bent portion of the support column, thereby applying a load from the reinforcing plate to the bent portion of the support column to make the angle of the bend greater than a right angle. A method for repairing the support pillars of a parking lot roof, characterized by including [a specific component].

8. A method for repairing damage to metal support columns that support a parking lot roof, The aforementioned support column has an open cross-sectional shape perpendicular to the height direction of the column. In the height direction of the support column, at the location where the damage has occurred, a metal reinforcing plate is attached to the entire or substantially entire thickness direction of both sides of the support column component. The aforementioned installation work, The process of providing a hole in the reinforcing plate for inserting the shaft portion of the bolt, The process involves immobilizing the reinforcing plate placed on the support column, then making the hole a guide hole for a drilling tool, and creating a hole in the support column using the drilling tool for inserting the shaft portion of the bolt, The process involves inserting the shaft portion of the bolt through the hole provided in the reinforcing plate and the hole provided in the support column, and screwing a nut onto the end of the shaft portion. A method for repairing the support pillars of a parking lot roof, characterized by including [a specific component].

9. In the method for repairing the support pillars of a parking lot roof according to claim 8, The aforementioned open cross-sectional shape includes a bent portion that is bent at a right angle. A method for repairing a support column for a parking lot roof, characterized in that the reinforcing plate placed on the support column is made immobile relative to the support column by bringing the end of the reinforcing plate into contact with the support column component forming the bent portion.

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