JP4344765B2 - Handrail attachment device and handrail attachment method - Google Patents

Description

  The present invention relates to a handrail attachment device and a handrail attachment method, and more particularly, to a handrail attachment device and a handrail attachment method that are easy to attach and do not generate rust or cracks in a handrail attachment base.

  Various construction examples have been proposed for handrails provided on the verandas, balconies, and corridors in the dwellings of concrete buildings. For example, an anchor nut is inserted into a fixing hole drilled in the fence installation part, and an adhesive filler such as epoxy resin is injected and fixed, while a fence supporting member that is fastened to the anchor nut via a bolt and a nut is fixed to the fence. By attaching the adhesive filler into the inside of the fence post from the injection hole provided on the lower end side of the fence post until the fence support member is embedded inside the lower end of the post by screwing or fitting, the fence post There is a method of fixing the lower end of the frame to the fence installation part (see Patent Document 1).

  However, in such a method, if the adhesive filler that fixes the anchor nut to the fixing hole of the fence installation part does not harden, the following work such as setting the fence support member to the anchor nut and making the fence post upright is performed. I can't. In addition, the troublesome work of setting the fence support member to the anchor nut using bolts and nuts takes time and effort, and it has a large diameter for the high-strength struts. This was a factor in delaying the work schedule.

  In order to avoid such a problem, conventionally, when a PC member for a handrail is manufactured, a metal support for fixing a handrail support is fixed, and a sleep or an open cone hole for installation is provided. However, in such a method, a metal anchor bar or an opening molding form may interfere with the structural bar of the PC member. In such a case, it is necessary to cut or move the reinforcing bars. Further, the movement of the reinforcing bars often causes insufficient covering of the reinforcing bars or causes fine cracks during transportation, and shrinkage cracks and rust of the opening repair mortar often become claims after several years.

  Also, the handrails with balconies, corridors, etc., had a structure corresponding to a driving force of 150 kg / m or 300 kg / m from the inside of the occupants. In many cases, it is necessary to cope with it, and the strength is also required. Therefore, it is necessary to drive a large-diameter opening or a large plate, and durability becomes a problem more and more.

  Especially in recent high-rise houses, the balconies of the residential part are often constructed using precast concrete members, and the handrails attached to the nose of the balconies are also higher wind resistance than before because of the high-rise houses. And weather resistance is required.

JP 2007-31976

A method in which PC members are prepared in advance in a PC factory and assembled on site is effective in improving workability on a construction site.
However, once inside the PC factory, a PC member with a hole for inserting an anchor bar was created as a fence installation member, and then the anchor bar was inserted into the hole at the construction site. In the method of injecting cement grout into the gaps between the muscles and filling the anchor muscles, there are the following problems.
That is, when the cement grout dries, it shrinks, creating a gap in the hole for inserting the anchor muscle, and water or the like penetrates into the gap, thereby causing rust in the anchor muscle or cracking in the PC member. There is a problem that damage occurs.

  The present invention solves this point and avoids operations such as drilling anchor muscles and cutting structural muscles by simultaneously fixing anchor rails for attaching handrails in a PC solidification operation in a PC factory. There is no need for temporary inserts or anchor bolts when mounting temporary handrails, and there is no need for plastering work at the construction site, and it is necessary to realize a handrail mounting device and handrail mounting method that can shorten the handrail mounting period. And

In order to solve the above-mentioned problem, a handrail attachment device according to the present invention partially protrudes from the precast concrete block at a position not intersecting with the precast concrete block constituting the base of the fence installation portion and the structural reinforcement of the precast concrete block. An anchor bar having an outer surface of a single unit or a plurality of bundles that are integrally standing in a state and coated with an epoxy resin coating, a hollow cylindrical aluminum main handrail post having a cement grout injection hole, A hollow tubular reinforcing pipe having a cement grout injection hole that is fitted inside the main handrail support pillar and reinforces the main handrail support pillar, and has an inner diameter larger than the anchor bar diameter. The handrail is fitted with the reinforcing pipe so that the reinforcing pipe inserts the protruding portion of the anchor bar. With installing struts, the present設手sliding upright, in order to protect from alkali corrosion by cement grout injected into said hollow tubular portion from the injection hole, it constituted by an epoxy resin film coating the inner wall It is characterized by.

Here, the reinforcing pipe may be subjected to rust prevention treatment.
The auxiliary pipe may be prismatic.

  In order to solve the above-mentioned problems, the handrail mounting method of the present invention is an anchor bar coated with an epoxy resin film in which a single piece or a plurality of bundles are bundled at a position not intersecting with the structural bar of the precast concrete block constituting the base of the fence installation part. A curing step of projecting and fixing, and a reinforcing pipe insertion step of inserting a hollow cylindrical reinforcing pipe whose inner and outer surfaces are rust-proofed into the inside of a hollow cylindrical main handrail support, and A fence installation part laying process in which the precast concrete block is laid at an installation position as a base of the fence installation part at a construction site, a temporary handrail fastening process for fastening a temporary handrail to the protruding anchor bar, and the temporary handrail. While dismantling and removing the main handrail fastening, install the main handrail post so that the reinforcing pipe is extrapolated to the protruding anchor bar and fasten the main handrail And degree, the a Tateiri adjusting step of adjusting the denominated insertion of the 設手 sliding, characterized in that a fixing step of fixing by injecting cement grout from the injection hole in the present 設手 sliding supporting columns.

  The present invention avoids operations such as drilling anchor bars and cutting structural bars by fixing anchor bars for attaching handrails at the same time as the precast concrete block, and installing temporary inserts and anchor bolts when installing temporary handrails. It is possible to realize a handrail attachment device and a handrail attachment method that can be made unnecessary, eliminate the need for plastering work at a construction site, and shorten the handrail attachment work period.

Hereinafter, the present invention will be described in detail with reference to the drawings.
FIG. 1 is a longitudinal sectional view of an embodiment of the handrail attachment device of the present invention.
In FIG. 1, a precast concrete block 10 is a block that forms a base of a fence installation portion by laying in combination, and has a built-in structural reinforcement 14 that prevents the concrete from falling off and maintains strength. In addition, an anchor bar 11 on which an epoxy resin coating conforming to JSCE-E102 (2003), which performs a rust-proof and anti-corrosion function, is applied at a predetermined position not intersecting with the structural bar 14 of the PC block 10, is one of the The part is provided so as to protrude by a predetermined length. The diameter of the anchor muscle 11 is determined by the required strength, but is set to a value of about 28 mm to 32 mm, for example.

This PC block 10 is manufactured in a PC factory, and when the PC block 10 is solidified, the anchor muscle 11 is solidified including the anchor muscle 11 so that the anchor muscle 11 does not intersect with the structural muscle 14. It is possible to configure so that it is not necessary to cut off.
The PC block 10 in which the anchor bars 11 are driven is manufactured in the PC factory and is transported to the construction site. Since transport is performed in this situation, the PC block 10 is not burdened and can be transported safely.

FIG. 2 is a horizontal cross-sectional view taken along the line AA of FIG. 1 showing a state in which the reinforcing pipe 12 is coupled and aligned with the handrail support column 13. 2A shows a case where the reinforcing pipe 12A is a cylinder, and FIG. 2B shows a case where the reinforcing pipe 12B is a prism.
The reinforcing pipe 12 may be either a cylindrical pipe or a square pipe as long as it has good coupling and alignment with the handrail support column 13. The reinforcing pipe 12 is made of steel and is electroplated for rust prevention. The thickness of the reinforcing pipe 12 is, for example, about 2.3 mm to 4.5 mm.

In an aluminum handrail processing factory, hollow cylindrical reinforcing pipes 12A and 12B (reinforcing pipes 12) excellent in coupling and alignment with the main handrail support pillars 13 are provided inside the hollow cylindrical main handrail support pillars 13. Insert and join. As shown in the figure, a plurality of ring-shaped members that are partially cut off are provided on the inner periphery of the main handrail support column 13, and the main handrail support column 13 connects the reinforcing pipes 12 </ b> A and 12 </ b> B with these members. It is designed to be inserted. Thus, the strength of the permanent handrail support 13 can be reinforced by inserting the reinforcing pipe 12 into the permanent handrail support 13.
As described above, the reinforcement pipe 12 is inserted into the permanent handrail support 13 in the aluminum handrail processing factory, and the permanent handrail support 13 into which the reinforcement pipe 12 is inserted is transported to the construction site.
As described above, the reinforcing pipe 12 and the handrail support column 13 are merely fitted and inserted in the aluminum handrail processing factory, and the cutting work for dimension adjustment is not performed at the construction site. Metal facets of the reinforcing pipe 12 and the handrail post 13 are not generated. Therefore, when the cement grout is injected into the main handrail support column 13, it is possible to prevent the occurrence of problems due to the facet reacting with the cement.

  At the construction site, after the PC block 10 that has been brought in is laid at a predetermined construction position, a temporary handrail post (not shown) is fastened thereto, and a horizontal member is attached to the temporary handrail post to adjust the position as a temporary handrail. Do.

At the time of finishing work with other parts proceeding, the temporary handrail is removed, and the projecting portion of the anchor bar 11 is covered with the main handrail post 13 into which the reinforcing pipe 12 is already inserted. At this time, the protruding portion of the anchor bar 11 is inserted into the hollow cylindrical reinforcing pipe 12.
After erection adjustment, cement grout is injected and fixed from the injection hole 15 provided in the handrail support column 13.

  The handrail support column 13 is formed of an aluminum alloy, and a colored epoxy coating treatment is applied to the inner surface thereof for alkali and electric corrosion resistance treatment. This coating is colored in order to facilitate visual inspection of the coating.

  When the handrail support column 13 is erected, the handrail unit formed of an aluminum alloy is incorporated in the same manner as the main handrail support column 13 to perform the adjustment.

  The handrail support column 13 and the handrail unit are manufactured in advance at an aluminum handrail processing factory and are carried into a construction site.

  After completion of the erection adjustment, a cement grout agent having an appropriate expansion property is injected into the main handrail support column 13 through the injection hole 15 formed in the aluminum handrail processing factory. In accordance with the position of the injection hole 15, the opening 16 is also provided in the reinforcing pipe 12, so that the cement grout agent is between the main handrail column 13 and the reinforcing pipe 12 and between the reinforcing pipe 12 and the anchor bar 11. Are also filled to secure these members.

  The cement grout is used in which the quality is controlled by measuring the fluidity and strength of the combined water, cement, and admixture in small portions and periodically testing their fluidity and strength.

FIG. 3 shows a top view and a longitudinal sectional view of the PC block 20 provided with a plurality of anchor bars 21 to 24 according to the second embodiment of the present invention.
In this embodiment, the anchor bars 21 to 24 coated with four epoxy resins having two different diameters are bundled and used (in the figure, the anchor bars 21 and 24 have the same diameter, and 22 and 23 have the same diameter), The handrail anchor muscle is configured.

  By using a plurality of anchor muscles 21 to 24 in this way, it is possible to maintain the overall strength, and it is relatively easy to select the position where the anchor muscles 21 to 24 are erected while avoiding the structural muscle 25. There is.

  The number of anchor muscles is not limited to four. For example, two or more anchor muscles may be used. The reinforcing pipe for inserting the bundle of anchor bars may be a cylindrical pipe, a prismatic pipe, or a rectangular section pipe.

Next, a method for attaching the handrail attachment device of the present invention described above will be described.
First, in a PC concrete factory, concrete is poured into a formwork and hardened to solidify the PC blocks 10 and 20. At this time, the structural bars 14 and 25 for maintaining the strength are cast inside the concrete, but the epoxy is coated with an epoxy resin film serving as an axis of the handrail anchor bar at a position not intersecting with the structural bars 14 and 25. The anchor bars 11, 21 to 24 are erected and the concrete is simultaneously hardened (hardening process).

  The reinforcing pipe 12 is manufactured in an aluminum handrail processing factory in accordance with the overall diameter and length of the standing anchor bars 11, 21 to 24. Cutting of the reinforcing pipe 12 is all performed in an aluminum handrail processing factory.

The reinforcing pipe 12 is made of steel and is subjected to electroplating treatment for rust prevention. Or the epoxy resin coating may be given.
And in the aluminum handrail processing factory, this reinforcement pipe 12 is inserted inside the hollow cylinder-shaped main handrail support 13 (reinforcing pipe insertion step).

  The handrail support column 13 into which the PC blocks 10 and 20 and the reinforcing pipe 12 manufactured in this way are inserted is carried into the construction site.

At the site, the PC blocks 10 and 20 are laid at predetermined positions (fence installation section laying process).
Thereafter, the temporary handrail support column is attached to the PC blocks 10 and 20, the horizontal member is attached to the temporary handrail support column, and the temporary handrail is fastened (temporary handrail fastening step).

After that, as the construction work progresses, the installation of the main handrail starts.
While removing the temporary handrail, the anchor bar 11 protruding in the vertical direction is inserted into the main handrail post 13 having the reinforcement pipe 12 inserted therein, and an aluminum handrail unit is further incorporated (main handrail fastening step). . At this time, the protruding anchor bar 11 is inserted into the reinforcing pipe 12.
The reinforcing pipe 12, the handrail support column 13 and the aluminum handrail unit are manufactured at an aluminum handrail processing factory. The reinforcing pipe 12 is inserted into the main handrail support 13 at an aluminum handrail processing factory.
In this way, in order to avoid processing the aluminum profile at the construction site, processing such as cutting is performed as much as possible in the aluminum handrail processing factory, and a coating film is applied to the edge and inside of the processing part such as cutting The treatment prevents the aluminum and cement from reacting and causing problems.

  After the fastening of the main handrail is completed, the erection is adjusted (erection adjustment process), and then cement grout having an adhesive filling function is injected from the injection hole 15 formed in the main handrail support column 13. Due to the hardening of the grout, the inside of the handrail support column 13 is fixed (fixing step).

  Since the present invention is configured as described above, when manufacturing handrail base members such as balconies and corridors in a PC factory, anchor bars coated with an epoxy resin having a cross-sectional area corresponding to the required strength are used. It can be used alone or in bundles with high precision and used as an anchor for attaching a temporary handrail post, and then used as an anchor for attaching an aluminum post for permanent installation.

  At this time, there is no opening in the PC block, no cutting of the structural streaks, the anchor bars coated with epoxy resin powder are accurately driven into the specified position as handrail anchor bars, and the PC block is transported to the construction site without damage can do.

Since the inside of the aluminum column (the main handrail column 13) is treated with an epoxy resin coating as a measure against alkali and electric corrosion resistance, the inside of the aluminum column is not affected by the alkalinity of the cement grout agent.
Further, the reinforcing pipe is subjected to rust-proof electroplating.
Furthermore, the anchor bars are also coated with epoxy resin to prevent rust and electric corrosion.

  For this reason, after the aluminum support is installed and adjusted, a cement grout agent having an appropriate expansibility is poured from the minute injection hole, and the aluminum support can be tightly connected to the PC block via the epoxy resin-coated reinforcing bar.

further,
(1) A handrail can be completed with a high-quality PC block without giving any defects to the PC block.
(2) Tightening with cement grout can be done safely.
(3) Temporary inserts, anchor bolts, and the like are not required for mounting the temporary handrail.
(4) No plastering work is required at the construction site.
(5) There are advantages such as shortening the handrail installation period.

Next, the adjustment of the installation position of the main handrail support column 13 in the above-described installation adjustment process will be described in more detail.
FIG. 4 is a horizontal sectional view showing a relative position between the anchor bar 11 and the handrail support column 13 according to the embodiment of the present invention. Among these, (a) shows a case where a cylindrical reinforcing pipe 12A is used, and (b) shows a case where a prismatic reinforcing pipe 12B is used.
In both (a) and (b), the solid lines indicate the positions of the reinforcing pipe 12 and the permanent handrail support 13 before the installation adjustment, and the broken lines indicate the position after the installation adjustment in the diagonal direction of the permanent handrail support 13. Indicates the position.

The diameter of the inner periphery of the reinforcing pipes 12 </ b> A and 12 </ b> B is slightly larger than the diameter of the anchor bar 11. Therefore, as shown in the figure, when the anchor bars 11 protruding from the reinforcing pipes 12A and 12B are inserted during the installation adjustment process, the outer peripheral surface of the anchor bars 11 and the inner peripheral surfaces of the reinforcing pipes 12A and 12B A space is formed between them.
For this reason, the handrail support column 13 can be moved in the horizontal direction while being inserted into the anchor bar 11, and fine position adjustment is possible.

  In addition, since the diagonal line of the reinforcing pipe 12B having a rectangular cross section is longer than the diameter of the reinforcing pipe 12A having a circular cross section, if the diameter of the anchor bar 11 is equal to or less than a predetermined length, La <Lb, Since Wa <Wb, when the reinforcing pipe 12B is used, the degree of freedom of the adjustment for the placement is higher and the adjustment becomes easier.

  As described above, the present invention can efficiently attach the handrail in a high-rise building, so that it can be widely used at the construction site of a high-rise building and widely used in a wide range of fields of the construction and construction industries. There is a possibility of being used.

It is a longitudinal cross-sectional view of one Embodiment of the handrail attachment apparatus of this invention. FIG. 2 is a horizontal sectional view showing a coupling and matching state between a reinforcing pipe and a main handrail support column in the embodiment shown in FIG. It is the upper side figure and longitudinal cross-sectional view of other embodiment of the handrail attachment apparatus of this invention. It is a horizontal sectional view showing the relative position of the anchor bar in the embodiment of the present invention and the support rail for a main handrail.

Explanation of symbols

10, 20 Precast concrete blocks 11, 21-24 Anchor bar 12 Reinforcement pipe 13 Permanent handrail column 14, 25 Structural bar 15 Injection hole 16 Opening

Claims (4)

A precast concrete block that constitutes the base of the fence installation part and a single unit or a plurality of bundles that are integrally installed with a part protruding from the precast concrete block at a position that does not intersect with the structural reinforcement of the precast concrete block Anchor bars coated with an epoxy resin coating on the outer surface , hollow cylindrical aluminum handrail struts having cement grout injection holes, and the main handrail struts fitted inside the handrail struts. A hollow cylindrical reinforcing pipe having a cement grout injection hole for reinforcing a handrail support pillar and having an inner diameter larger than the diameter of the anchor bar, the reinforcing pipe being a protruding portion of the anchor bar to interpolate so, with installing the設手sliding upright of the reinforcing pipe is fitted, the present設手sliding upright, the To protect against alkaline corrosion by cement grout injected into said hollow tubular portion from the entry apertures, handrail mounting apparatus characterized by configured by an epoxy resin film coating the inner wall.   The handrail attachment device according to claim 1, wherein the reinforcing pipe is subjected to a rust prevention treatment.   The handrail attachment device according to claim 1 or 2, wherein the auxiliary pipe has a prismatic shape. A curing step of projecting and fixing anchor bars coated with an epoxy resin film in which single or multiple bundles are bundled at positions that do not intersect with the structural bars of the precast concrete block constituting the base of the fence installation part;
Reinforcing pipe insertion step of inserting a hollow cylindrical reinforcing pipe whose inner and outer surfaces are rust-proofed into the inside of a hollow cylindrical main handrail support,
A fence installation part laying step of laying the precast concrete block at the construction site as a base of the fence installation part at a construction site;
A temporary handrail fastening step of fastening a temporary handrail to the protruding anchor bar;
A permanent handrail fastening step of fastening the permanent handrail by installing the permanent handrail support column so that the reinforcing pipe is extrapolated to the protruding anchor bars while dismantling and removing the temporary handrail;
An installation adjustment process for adjusting the installation of the main handrail,
A method of attaching a handrail, comprising: a fixing step of injecting cement grout from an injection hole in the main handrail support post and fixing the cement grout.

Images