JP6391538B2 - Repair method of fixed support in fall prevention handrail - Google Patents

Description

  The present invention relates to a method for repairing a fixed column in a fall prevention handrail.

  A fall-preventing handrail fixed to a housing such as a veranda or a balconi has a structure in which an enclosure member composed of a headboard, a lattice material, or the like is attached to a fixed support whose lower portion is embedded in the housing. The fixed column is an important member for ensuring the strength of the fall-preventing handrail, but its deterioration is inevitable due to long-term use.

  Japanese Patent Application Laid-Open No. H10-228561 discloses a technique for using an existing fixed support as a method for regenerating a fall prevention handrail. That is, it is disclosed that the existing supporting column 1 is covered with the fixed auxiliary supporting column 5 and further the new supporting column 6 is covered. In addition, an auxiliary arm 16 is separately provided for the column 6. Japanese Patent Application Laid-Open No. H10-228688 discloses a method in which the existing support column 2 is covered with a new support column 2A and fixed.

JP 57-174574 A JP 58-44146 A

  By the way, some of the above-mentioned fixed struts are configured by covering the outer surface of a cylindrical core member made of iron-based metal with a strut body made of aluminum-based metal. In such fixed struts having an internal / external double structure, while the core material ensures a sufficient strength, the external appearance of the strut body is good and has been used for a long time.

  However, in the fixed support with the core material covered with the support body as described above, electrolytic corrosion occurs due to rain water or condensed water that has entered between the core material and the support body. This will cause corrosion of the main column body. In particular, when corrosion progresses, the rust generated on the outer surface of the core material leaks to the outside through the fine holes formed when the pillar body is corroded, causing a deterioration phenomenon that significantly impairs the appearance of the pillar body. It tends to occur. Of course, the column main body is processed to be hard to be deteriorated by anodizing on the outer surface. However, since it is difficult to anodize the inner surface, the above-described deterioration phenomenon occurs.

  In the fixed strut composed of the core material and the strut body as described above, when rust appears on the outer surface of the strut body, a fall-preventing handrail is applied by the method described in Patent Document 1 or Patent Document 2. It is possible to play. However, in this case, it is not preferable from the point of appearance of the fall-preventing handrail after repair because a new fixed column is put on the existing fixed column or a separate auxiliary column is provided for the fixed column. In addition, the problem of rust that has risen from the outer surface of the column main body in the existing fixed column is not fundamentally solved. In addition, the fixed post after repair must be thicker than before repair, and it is difficult to attach the existing enclosure member to the fixed post after repair, and the enclosure member that is hardly damaged is also discarded.

  The present invention has been made in view of the circumstances as described above, and its purpose is to fix an existing fixed column composed of a core material and a column main body so as not to cause a problem in appearance and an existing enclosure member. It is an object of the present invention to provide a method for repairing a fixed column in a fall-preventing handrail that can be easily repaired while being reusable.

  In order to achieve the above object, in the present invention, basically, the core material is not so much deteriorated even in a deteriorated state in which rust has emerged on the outer surface of the column main body in the fixed column. Focusing on the fact that it still often has sufficient strength, this core material is used effectively for repair.

Specifically, the following solution is adopted in the present invention. That is,
In a fall-preventing handrail in which a fixed support column is configured by covering the outer surface of a cylindrical core member made of iron-based metal with a support column body made of aluminum-based metal, and at least the lower part of the core member is embedded in the housing A method for repairing a fixed column,
A strut body removing step for removing the strut body from the core;
After the strut body removal step, a rust prevention step for performing a rust prevention treatment on the outer surface and the inner surface of the core material,
After the rust prevention step, a mounting step of covering the core material with a new prop body,
Have
Rust prevention treatment of the inner surface of the core material in the rust prevention step,
An injection step of injecting a rust conversion agent into the core material;
A storage step of storing the rust conversion agent in the core material and changing red rust on the inner surface of the core material to black rust,
A discharging step of discharging the rust conversion agent stored in the core material to the outside of the core material;
have,
It is like that.

  According to the above solution, the repaired fixed support post is prevented from proceeding with subsequent rust by rust prevention treatment on the inner and outer surfaces of the core material. In addition, the structure of the fixed column after the repair is hardly changed from that before the repair, and the appearance of the exterior is greatly improved by the new column main body exposed to the outside. In addition, unlike the conventional repair method, the repaired fixed strut can be repaired so that it has almost the same thickness as that before repair, so that it is easy to attach the existing enclosure member to the fixed strut after repair. Of course, there is no need to provide a separate auxiliary strut for the fixed strut, excavate the existing core material, or embed a new core material, which is also preferable in terms of easy repair.

  A preferred mode based on the above solution is as follows.

  After the strut body removing step, before performing a rust prevention treatment of the inner surface of the core material in the rust prevention step, a filling step of filling a filler in at least a lower portion embedded in the housing of the core material is further performed. Have. In this case, since the rust conversion agent is not stored in the lower part of the core material, the amount of rust conversion agent used in the injection step can be reduced by that amount, and the rust conversion agent can be easily discharged in the discharge step. Is preferable.

A hole forming step of forming a lower through hole at a position in the vicinity of the upper part of the lower part of the core material before the injection step after the support body removing step;
A hole closing step of closing the lower through hole with a plug member after the hole forming step and before the injection step;
Have
In the discharging step, the plug member is removed from the lower through hole, and the rust conversion agent in the core is discharged from the lower through hole to the outside.
Can be. In this case, since the rust conversion agent can be discharged from the core material to the outside using the lower through-hole, the rust conversion agent can be discharged more easily.

  In addition to this, in the filling step, the core material can be filled with the filler until reaching the lower edge of the lower through hole. In this case, the amount of rust conversion agent injected (stored) in the core material can be reduced as much as possible, and the rust conversion agent does not accumulate below the lower through hole in the core material, so the rust conversion agent is discharged. Is even easier.

Before the rust prevention step, the enclosure member previously attached to the fixed column is removed,
The removed enclosure member is attached to the fixed column repaired in the mounting step.
Can be. In this case, it is preferable to reproduce the fall prevention handrail as a whole at low cost.

  According to the present invention, it is possible to easily repair the fixed support column while preventing the appearance problem and reusing the existing enclosure member.

The figure which shows an example of the fall prevention handrail containing the fixed support | pillar used as the object repaired by this invention. The partial cross section side which looked at the fixed support | pillar part in the fall prevention handrail shown in FIG. 1 from the side. The partial cross section side view which shows the state which removed enclosure members, such as a headboard, from the state of FIG. The partial cross section side view which shows the state which removed the support | pillar main body from the state of FIG. The partial cross section side view which shows a mode when a lower through-hole is formed and it fills with a filler from the state of FIG. The partial cross-sectional side view which shows the state which covers a lower through-hole and inject | pours a rust conversion agent into a core material from the state of FIG. The partial cross-section side view which shows the state which covered the new support | pillar main body after discharging the rust conversion agent through the lower through-hole from the state of FIG. X8-X8 line equivalent sectional drawing of FIG. The partial cross section side view which shows the state which attached the old enclosure member removed from the state of FIG. 7 with respect to the fixed pillar repaired. The partial cross section side view which shows the state which covered the lower part of the fixed support | pillar after repair with the cover member. The figure which shows simply the repair method example in this invention chronologically.

  In FIG. 1, a fall-preventing handrail A is installed on a casing 1 such as a balconi. The fall-preventing handrail A includes a plurality of fixed columns 10 whose lower portions are embedded in the frame 1 and a surrounding member 20 attached to the fixed column 10. The enclosure member 20 is disposed on the adjacent fixed column 10, and is composed of a headboard 21 and a lattice material 22 in this embodiment. The headboard 21 is stretched over the upper end portion of the adjacent fixed column 10 and is fixed to the fixed column 10 by a fixture. In addition, the lattice material 22 is disposed between the adjacent fixed columns 10 at a position below the headboard 21 and is fixed to the fixed columns 10 by a fixture. In the present embodiment, the lattice member 22 is used for the enclosing member 20, but a panel member may be used instead of the lattice member 22, or the lattice member and the panel member may be used in combination. Further, the enclosure member 20 may be formed by integrally forming the cap 21 and the lattice material 22 or the like.

  As shown in FIG. 2, the fixed column 10 is composed of a core material 11 and a column body 12. The core material 11 is formed in a cylindrical shape from an iron-based metal (in this embodiment, a square tube having a substantially square cross section). The column main body 12 is formed in a cylindrical shape (in this embodiment, a rectangular tube having a substantially square cross section corresponding to the shape of the core material 11) with an aluminum-based metal.

  In the present embodiment, the upper end portion of the core material 11 reaches the position of the substantially central portion in the vertical direction in the column main body 12, and the lower portion of the core material 11 is inserted deeply into the mounting hole 1 a of the housing 1. . On the other hand, the column main body 12 has its lower part slightly inserted into the mounting hole 1 a, but its lower end is positioned above the lower end of the core 11. In addition, the relationship between the length of the core material 11 and the column main body 12 is not particularly limited, for example, the upper end portion of the core material 11 reaches the upper end portion in the column main body 12.

  The core member 11 and the column main body 12 are integrated with the housing 1 by a mortar 2 filled in the mounting hole 1a. Moreover, the upper surface which the attachment hole 1a opened among the housings 1 is shown by the code | symbol 1b, and the drainage groove formed in the downward direction so that it may continue to the upper surface 1b is shown by the code | symbol 1c. Note that the lower end of the column main body 12 may not be embedded in the housing 1 (for example, the lower end of the column main body 12 is placed on the upper surface of the housing 1).

  Next, a method of repairing the fixed column 10 using the method of the present invention will be described. An example of the process is simply shown in FIG. Hereinafter, description will be made with reference to FIG.

  First, prior to the repair of the present invention, a strength test of the fall prevention handrail A is performed. In the present embodiment, a predetermined load is applied to the fixed column 10 and the cap 21 in the tilt direction, and the displacement amount of the fixed column 10 and the cap 21 in the tilt direction is measured. Step 1 is started after the strength of the fall prevention handrail A is confirmed.

  In step 1, the enclosure member 20 (headwood 21, lattice material 22) is removed from the fixed column 10. That is, the state shown in FIG. 2 (corresponding to the state shown in FIG. 1) is shifted to the state shown in FIG.

  In step 2, as a support body removing step, the support body 12 located above the upper surface 1 b of the housing 1 is removed from the core material 11. FIG. 4 shows the core material 11 in a state where the column main body 12 is removed.

  In step 3, the core 11 is subjected to a strength test. In the present embodiment, a predetermined load is applied to the core material 11 in the falling direction, and the amount of displacement of the core material 11 in the falling direction at this time is measured. When the amount of displacement of the core material 11 in the falling direction at this time is equal to or less than a predetermined amount, it is determined that the core material 11 has sufficient strength, and the process proceeds to step 4. When the amount of displacement of the core material 11 in the falling direction exceeds a predetermined amount, it is determined that the core material 11 does not have sufficient strength, and other repair methods (for example, the housing 1 from which the core material 11 is removed) A repair method for providing a bracket for supporting the new prop body is adopted.

  In step 4, as a hole forming step, in the core material 11 in which the lower part is embedded in the casing 1, in a position near the upper part of the lower part (in other words, a position near the upper part of the upper surface of the casing 1 around the core material 11) The lower through hole 30 penetrating in the thickness direction is formed by, for example, drilling (see FIG. 5).

  In Step 5, as a filling step, a filler such as mortar or epoxy resin is filled in at least a lower part of the core material 11 embedded in the housing 1 so as to serve as rust prevention and protection of the housing 1. The filled filler is indicated by reference numeral 31 in FIG. The filler 31 is filled in the core material 11 to a height near the lower edge of the lower through-hole 30 within a range that does not block the lower through-hole 30. In the present embodiment, the filler 31 is supplied into the core material 11 through the lower through-hole 30, but the filler 31 may be supplied into the core material 11 through the upper opening of the core material 11. Is possible.

  In step 6, as a hole closing step, the lower through hole 30 is closed by the plug member 32, for example. And the rust prevention process of the inner surface of the core material 11 is started as a rust prevention step. First, in step 7, after the filler 31 has hardened, as an injection step, a rust conversion agent 41 is injected into the core material 11 from above the core material 11 (in FIG. 6, the rust conversion agent 41 is for injection). (Shown in the container 40). The rust converting agent 41 is injected to a position as high as possible in the core material 11 (injected just before overflowing from the upper end opening of the core material 11). In step 8, as a storing step, red rust on the inner surface of the core material 11 is stored in the core material 11 until it becomes black rust. In this embodiment, a solution containing tannic acid is used as the rust conversion agent. However, any commercially available product may be used as long as it has a function of sufficiently blackening the red rust of the core material 11. Can do.

  In step 9, as a discharging step, the rust conversion agent 41 stored in the core material 11 is discharged to the outside of the core material 11. In the present embodiment, the plug member 32 is removed from the lower through hole 30, whereby the rust conversion agent 41 injected into the core material 11 is discharged from the lower through hole 30 to the outside by gravity (self-weight). Is done. And the rust prevention process of the inner surface of the core material 11 is complete | finished, and it transfers to the rust prevention process of the outer surface of the core material 11. FIG. In addition, the rust conversion agent 41 discharged | emitted from the lower through-hole 30 will be collect | recovered by a collection container, and will be processed as industrial waste.

  In step 10, as the rust prevention treatment of the outer surface of the core material 11, first, the rust on the outer surface of the core material 11 is removed by a scraper, an electric grinder or the like. In step 11, a rust inhibitor is applied to the outer surface of the core material 11. As the rust preventive agent, an appropriate commercially available product can be used, but those having a function of converting red rust to black rust are preferable. In the present embodiment, a solution containing tannic acid is used as a rust inhibitor. In step 12, after curing and drying the rust inhibitor, a rust-preventing paint is further applied to the core material 11. At this time, by coating with a rust-preventing paint having insulating properties, when the core material 11 is covered with a new column main body, which will be described later, insulating properties are ensured and electrolytic corrosion can be prevented. By the rust prevention treatment as described above, the progress of red rust to the outer surface of the core material 11 is prevented as much as possible. And if the rust prevention process of the inner surface of the core material 11 and an outer surface is completed, it will transfer to a mounting step.

  In step 13, as an attachment step, the outer surface of the core material 11 is covered with the new column main body 12B (see FIG. 7). The new support body 12B is formed in a cylindrical shape from an aluminum-based metal. Moreover, the new support | pillar main body 12B is covered with the core material 11, and is fixed with fixing tools, such as a screw and a volt | bolt (not shown). In FIGS. 7 and 8 (the same applies to FIGS. 9 and 10 described later), the fixed support column repaired as described above is indicated by reference numeral 10B.

  As shown in FIG. 8, a plurality of protrusions 12a are integrally formed on the inner surface of the new column main body 12B at intervals in the circumferential direction. When the new column main body 12 </ b> B is placed on the outer surface of the core material 11, the protrusion 12 a comes into contact with the outer surface of the core material 11, and the new column main body 12 </ b> B is fitted to the core material 11. In the embodiment, the protrusion 12a has a substantially C-shaped cross section and is formed to extend over the entire length of the new column main body 12B in the vertical direction. A first gap α extending in the vertical direction is formed between the core member 11 (the outer surface) and the new column main body 12B (the inner surface) by the protrusion 12a. Water such as rainwater that has entered the new column main body 12B flows down the first gap α and is guided to the vicinity of the lower end of the new column main body 12B. Further, the water that flows down in the core material 11 and accumulates on the upper surface of the filler 31 flows out from the lower through hole 30 to the first gap α.

  The height of the upper end of the new column main body 12B substantially coincides with the upper end of the old column main body 12 before removal, but the second column main body 12B has a second gap between the lower end of the new column main body 12B and the upper surface 1b of the housing 1. The gap β is formed. As a result, the water flowing down the first gap α is discharged to the outside through the second gap β, which is preferable in preventing or suppressing the occurrence of rust itself. The upper surface 1b of the housing 1 is slightly inclined downward (toward the right side in FIG. 7) toward the building (not shown), and the water flowing out from the second gap β to the upper surface 1b is 1 drainage groove 1c.

  After step 13, in step 14, the enclosure member 20 removed in step 1 is attached to the repaired fixed column 10B, and the state after this attachment is shown in FIG. As described above, by reusing the enclosure member 20 together with the reuse of the core material 11, it is much cheaper than when these are replaced with new ones. If severe corrosion or destruction is observed in some of the surrounding members 20, it is possible to replace only the surrounding members 20 with new ones.

  As shown in FIG. 10, in the fixed column 10 </ b> B repaired by covering the second gap β formed between the lower end of the new column main body 12 </ b> B and the upper surface 1 b of the housing 1 with the cover member 60. It is also possible to make the exposed portion of the outer surface of the core material 11 invisible. In the cover member 60, a discharge hole 60a for discharging the water flowing out from the second gap β to the outside of the cover member 60 is formed in the side wall located on the lower side of the upper surface 1b. Further, the cover member 60 has, for example, a split structure, and is disposed so as to sandwich the repaired fixed column 10B from the left or right or front and rear.

  As described above, according to the embodiment of the present invention, unlike the conventional repair method, the repaired fixed column 10B can be repaired so that it has almost the same thickness as that before the repair. It is easy to attach the existing enclosure member 20, and the fall prevention handrail A as a whole can be repaired at low cost. Further, according to the embodiment of the present invention, there is no need to separately provide auxiliary struts for the fixed struts 10B, excavate the existing core material 11, or embed a new core material. Can be repaired easily.

  Note that the present invention is not limited to the above-described embodiment, and modifications and improvements can be made within a range in which the object of the present invention can be achieved. For example, the following cases are also included. The casing 1 that is a fixed object to which the fall prevention handrail A is attached includes an appropriate part such as a veranda, a staircase, a corridor, a roof, and the like as long as it is located at a place where the fall is a problem. As long as the core material 11 can store the rust conversion agent 41 therein, the cross-sectional shape thereof may be any shape such as a cylindrical shape or a polygonal cylindrical shape. In addition, it is preferable to use a new column main body 12B in which a first gap α is formed between the inner surface and the outer surface of the core material 11. When the first gap α is formed, a spacer made of an insulating member such as a hard synthetic resin may be additionally interposed between the core material 11 and the new column main body 12B.

  In the above-described embodiment, after the enclosure member 20 fixed to the fixed column 10 to be repaired is removed (see Step 1 and FIG. 3), the column body 12 is removed (see Step 2 and FIG. 4). It is also possible to remove the column main body 12 covering the core material 11 with the member 20 left around the fixed column 10, and then remove the surrounding member 10 to perform rust prevention treatment of the core material 11.

  The discharge of the rust conversion agent 41 injected into the core material 11 may be performed by suction using a pump or the like. In this case, the lower through hole 30 is provided for discharging the rust conversion agent 41. It does not have to be formed on the core material 11. Further, the core material 11 may not be filled with the filler 31, and the rust conversion agent 41 may be injected into the lower portion of the core material 11 to perform rust prevention treatment. The rust conversion agent 41 stored inside can be sucked up by a pump or the like.

  In the above-described embodiment, the rust prevention step of the core material 11 requires time for curing and drying the rust preventive agent applied to the outer surface of the core material 11. Therefore, the rust prevention process of the outer surface is performed after the rust prevention process of the inner surface. However, depending on the situation, it is possible to carry out the rust prevention treatment on the outer surface before the rust prevention treatment on the inner surface.

  An opening may be formed in the side wall of the new column main body 12B at a position corresponding to (aligning with) the lower through hole 30 of the core material 11. Thereby, when the water in the core material 11 flows out from the lower through-hole 30, it flows out to the outside also from the opening portion of the new column main body 12B, so that a more rust prevention effect can be expected.

  INDUSTRIAL APPLICATION This invention can be utilized for repair of the fixed support | pillar of the fall prevention handrail installed in the veranda, the staircase, the corridor, the rooftop.

A: Fall-preventing handrail 1: Housing (fixed object of fixed support)
DESCRIPTION OF SYMBOLS 1a: Mounting hole 1b: Upper surface 1c: Drainage groove 2: Mortar 10: Fixed support | pillar 10B: Repaired fixed support | pillar 11: Core material 12: Support | pillar main body (removal object)
12B: New prop body 20: Enclosure member 21: Kasagi 22: Lattice material 30: Lower through-hole 31: Filler (for the lower part of the core material)
32: Plug member (for covering the lower through hole)
41: Rust conversion agent (for inner surface of core material)
60: Cover member 60a: Discharge hole

Claims (5)

In a fall-preventing handrail in which a fixed support column is configured by covering the outer surface of a cylindrical core member made of iron-based metal with a support column body made of aluminum-based metal, and at least the lower part of the core member is embedded in the housing A method for repairing a fixed column,
A strut body removing step for removing the strut body from the core;
After the strut body removal step, a rust prevention step for performing a rust prevention treatment on the outer surface and inner surface of the core material,
After the rust prevention step, a mounting step of covering the core material with a new prop body,
Have
Rust prevention treatment of the inner surface of the core material in the rust prevention step,
An injection step of injecting a rust conversion agent into the core material;
A storage step of storing the rust conversion agent in the core material and changing red rust on the inner surface of the core material to black rust,
A discharging step of discharging the rust conversion agent stored in the core material to the outside of the core material;
have,
A method for repairing a fixed column in a fall-preventing handrail. In claim 1,
After the strut body removing step, before performing a rust prevention treatment of the inner surface of the core material in the rust prevention step, a filling step of filling a filler in at least a lower portion embedded in the housing of the core material is further performed. A method of repairing a fixed support in a fall-preventing handrail, characterized by comprising: In claim 2,
A hole forming step of forming a lower through hole at a position in the vicinity of the upper part of the lower part of the core material before the injection step after the support body removing step;
A hole closing step of closing the lower through hole with a plug member after the hole forming step and before the injection step;
Have
In the discharging step, the plug member is removed from the lower through hole, and the rust conversion agent in the core is discharged from the lower through hole to the outside.
A method for repairing a fixed column in a fall-preventing handrail. In claim 3,
In the filling step, the core material is filled with the filler until it reaches the vicinity of the lower edge of the lower through hole. In any one of Claims 1 thru | or 4,
Before the rust prevention step, the enclosure member previously attached to the fixed column is removed,
The removed enclosure member is attached to the fixed column repaired in the mounting step.
A method for repairing a fixed column in a fall-preventing handrail.

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