JP7495693B2 - Water stop joint - Google Patents

Description

The present invention relates to a waterproof joint for waterproofing bolt fixing holes in the framework of a building and panel holes in its front panel.

In buildings, condominiums, and other structures, large-scale repair work needs to be carried out roughly every 10 to 15 years to maintain the architectural performance. During this time, the exterior may need to be cleaned or painted, which requires the installation of temporary construction scaffolding around the building or the use of a crane to suspend a gondola carrying workers.

Patent Document 1 discloses that a bolt fixing hole made of a nut-shaped fastener is formed in the structure, a scaffolding bolt is fixed by screwing it into the bolt fixing hole, and the scaffolding is assembled using the scaffolding bolt as a foothold.

JP 2009-24340 A

However, in some buildings, a front panel made of dry tile panels or the like is attached to the front of the structure at intervals of several centimeters. In such cases, it is possible to use the bolt fixing holes to set up scaffolding, but the front panel gets in the way and prevents adequate waterproofing of the bolt fixing holes after the scaffolding bolts are removed. If this waterproofing is not carried out completely, the nuts in the bolt fixing holes may have deteriorated due to corrosion or other reasons at the time of the next repair work, and the bolt fixing holes used previously may not be usable.

The object of the present invention is to solve the above-mentioned problems and provide a waterproof joint that can easily and reliably waterproof bolt fixing holes, etc., after removing scaffolding bolts in a building by arranging a front panel on the surface of the building frame.

The waterproof joint of the present invention, which is intended to achieve the above-mentioned object, is a waterproof joint made of a metal bolt that is placed between a bolt fixing hole and a panel hole in the front panel of a building structure, in which a front panel is placed at a distance from the front panel of the building structure, an anchor is embedded in the bolt fixing hole in the building structure, and a panel hole is drilled in the front panel of the building structure in front of the bolt fixing hole. The metal bolt has an external thread at its tip that screws into the internal thread of the anchor, and a first annular waterproof rubber made of synthetic rubber that fits into the bolt fixing hole of the building structure is inserted into the tip of the metal bolt, and a second annular waterproof rubber made of synthetic rubber that fits into the panel hole of the front panel is inserted into the rear end of the metal bolt.

The waterproof joint of the present invention prevents water from entering the bolt fixing holes of the structure and the panel holes of the front panel after construction, and maintains the usable state of the anchors 3 embedded in the bolt fixing holes, making it easy to use the bolt fixing holes and panel holes during the next construction work.

13 is an explanatory diagram of the bolt fixing holes in the main body and the panel holes in the front panel. FIG. 1 is a cross-sectional view of a state in which a scaffolding bolt is attached to a bolt fixing hole, etc. This is an oblique view of a watertight joint and an attached covering member. A cross-sectional view of the watertight joint and the covering member in use.

The present invention will now be described in detail with reference to the illustrated embodiments.
1 is an explanatory diagram showing a state in which a bolt fixing hole 1 for fixing a scaffolding bolt is formed in a skeleton B, and a panel hole 2 is drilled in a front panel P arranged at a distance from the front of the skeleton B. The front panel P is fixed to the skeleton B by a mounting bracket.

During repair work, a drill is used to drill a panel hole 2, for example 24 mm in diameter, into the front panel P from the outside, and then a bottomed bolt fixing hole 1, for example 18 mm in diameter, into the structure B behind it. From a work standpoint, the size of the panel hole 2 in the front panel P is made larger than the bolt fixing hole 1 in the structure B.

A cylindrical anchor 3 made of metal and having an internal thread 3a is inserted into the bolt fixing hole 1. A knurled groove is engraved on the outer periphery of this anchor 3 to prevent it from slipping out of the bolt fixing hole 1, and several slits 3b are formed in the tip of the anchor 3 in the longitudinal direction. Furthermore, a metallic cone member 4 with a tapered shape with a larger diameter at the tip is fitted into the anchor 3 on the slit 3b side.

When the anchor 3 with the cone member 4 provisionally fitted to its tip is driven into the bolt fixing hole 1 using a driving tool, the cone member 4 fits into the anchor 3, causing the diameter of the tip of the anchor 3 to expand due to the slit 3b, and the anchor 3 is fixed tightly in the bolt fixing hole 1. In order to fit the annular waterproof rubber described below, it is preferable to insert the anchor 3 10 mm or more deeper than the entrance of the bolt fixing hole 1. Furthermore, if adhesive is filled around the anchor 3, the anchor 3 will be even more firmly fixed in the bolt fixing hole 1.

When assembling the scaffolding, as shown in Figure 2, a scaffolding bolt 5 with a diameter of, for example, 12 mm, length of approximately 40 cm, and external thread 5a at the tip is inserted into this bolt fixing hole 1 through panel hole 2 in front panel P, and the external thread 5a at the tip is screwed into the internal thread 3a of anchor 3, whereby the scaffolding bolt 5 is firmly fixed to the structure B.

In this way, multiple scaffolding bolts 5 are attached in sequence from the bottom to the top of the structure B, and scaffolding boards are placed between the scaffolding bolts 5 on the outside of the front panel P to form an accessway, allowing workers to carry out their work.

After repair work is completed and the scaffolding bolts 5 are removed, it is necessary to take measures such as waterproofing the bolt fixing holes 1 in the structure B and the panel holes 2 in the front panel P. If this is not done, the appearance will be poor, soil and sand will become clogged, corrosion will occur, and the bolt fixing holes 1 etc. will not be able to be reused for the next repair work.

Figure 3 is a perspective view of the watertight joint 10 and the attached facing member 21 used for this purpose, which is a tool for closing the bolt fixing hole 1 and the panel hole 2 after repair work. The watertight joint 10 is made of a metal bolt, preferably made of stainless steel, with a diameter of 12 mm and a length of about 100 mm, and has an external thread 11 engraved along its entire length that screws into the internal thread 3a of the anchor 3 shown in Figure 1. In addition, the rear end surface of the watertight joint 10 is formed with a rotation action hole consisting of a hexagonal hole 12 into which a hexagonal wrench fits.

A first annular waterproof rubber 13 made of synthetic rubber or the like is inserted inside the external thread 11 at the tip of the waterstop joint 10, and a similarly annular second annular waterproof rubber 14 is inserted at the rear end of the waterstop joint 10. The outer diameter of the first annular waterproof rubber 13 corresponds to the diameter 18 mm of the bolt fixing hole 1 of the body B, and the outer diameter of the second annular waterproof rubber 14 corresponds to the diameter 24 mm of the panel hole 2 of the front panel P, and the outer diameter of the first annular waterproof rubber 13 is smaller than the outer diameter of the second annular waterproof rubber 14.

A mounting member 21 is also used as an accessory. This mounting member 21 covers the panel hole 2 of the front panel P after construction, and is fixed to the hexagonal hole 12 at the rear of the mounting member 21 after the watertight joint 10 is attached. An insertion pin 21b that has radial elasticity, such as a slit, protrudes forward on the inside of the circular outer surface 21a of the mounting member 21 and is inserted into the hexagonal hole 12. The outer surface 21a of the mounting member 21 has the same diameter as the panel hole 2 so that it can fit into the panel hole 2 of the front panel P, and the color and pattern of the outer surface 21a are the same as the front panel P.

When using this waterproof joint 10, the waterproof joint 10 is adjusted in advance, for example by cutting off the tip, to the length from the surface of the front panel P to the internal thread 3a of the anchor 3. The first annular waterproof rubber 13 is inserted into the tip of the waterproof joint 10, and the second annular waterproof rubber 14 is inserted into the rear end. In this case, since the external thread 11 is engraved over the entire length of the waterproof joint 10, the first and second annular waterproof rubbers 13, 14 do not move on the waterproof joint 10.

Next, a synthetic resin sealing tape (not shown) is wrapped around the tip of the waterproof joint 10 to prevent loosening and to make it waterproof, and then waterproof putty 15 is applied to the tip side of the first annular waterproof rubber 13. As shown in Figure 4, the tip of the waterproof joint 10 together with the first annular waterproof rubber 13 is fed into the bolt fixing hole 1 through the panel hole 2 in the front panel P.

In this state, when a hexagonal wrench is fitted into the hexagonal hole 12 at the rear end of the waterstop joint 10 and the waterstop joint 10 is rotated, the outer thread 11 together with the sealing tape screws into the inner thread 3a of the anchor 3, and the entrance of the bolt fixing hole 1 is sealed by the sealing tape, waterstop putty 15, and first annular waterproof rubber 13. At this time, as the waterstop joint 10 screws into place, the second annular waterproof rubber 14 at the rear end is inserted into the panel hole 2, and the second annular waterproof rubber 14 prevents the intrusion of rainwater, etc. into the panel hole 2.

Next, insert pin 21b of mounting member 21 into hexagonal hole 12 on the rear end surface of water stop joint 10 located inside panel hole 2, so that outer surface 21a is flush with front panel P. Insert pin 21b has radial elasticity, so it will not easily fall out of panel hole 2.

If the color of the outer surface 21a of the mounting member 21 is the same as that of the front panel P, the panel hole 2 cannot be seen unless observed up close, and the aesthetic appearance of the building is not marred. The diameter of the outer surface 21a of the mounting member 21 can be made larger than that of the panel hole 2 so that it also covers the periphery of the panel hole 2.

For the next large-scale repair work that requires scaffolding, the waterproof joint 10 and the facing member 21 that are suspended between the bolt fixing hole 1 and the panel hole 2 can be removed, and the scaffolding bolt 5 can be fixed to the bolt fixing hole 1 to construct the scaffolding.

In this way, the water stop joint 10 according to the present invention is used in a structure in which a front panel P is placed at a distance from the front of a structural body B, a bolt fixing hole 1 with an anchor 3 embedded in the structural body B, and a panel hole 2 drilled in the front panel P in front of the bolt fixing hole 1 are provided, and it prevents water from entering the bolt fixing hole 1 of the structural body B and the panel hole 2 of the front panel P after construction, and it maintains the usable state of the anchor 3 embedded in the wall of the structure, allowing the bolt fixing hole 1 and panel hole 2 to be used during the next construction work.

REFERENCE SIGNS LIST 1 Bolt fixing hole 2 Panel hole 3 Anchor 3a Internal thread 4 Cone member 5 Scaffold bolt 10 Watertight joint 11 External thread 13, 14 Annular waterproof rubber 21 Covering member 22 Insertion sleeve B Body P Front panel

Claims (4)

A watertight joint is provided in a building having a front panel spaced apart from the front of a structure, a bolt fixing hole with an anchor embedded in the structure, and a panel hole drilled in the front panel in front of the bolt fixing hole, the watertight joint being made of a metal bolt that is stretched between the bolt fixing hole and the panel hole,
A waterproof joint characterized in that the metal bolt has an external thread at its tip that screws into the internal thread of the anchor, a first annular waterproof rubber made of synthetic rubber that fits into the bolt fixing hole of the main body is inserted into the tip of the metal bolt, and a second annular waterproof rubber made of synthetic rubber that fits into a panel hole in the front panel is inserted into the rear end of the metal bolt. The water stop joint according to claim 1, characterized in that the rear end surface of the metal bolt has a rotation action hole for rotating the metal bolt. The watertight joint according to claim 2, characterized in that a surface member that closes the panel hole of the front panel is attached inside the rotation action hole of the metal bolt. The watertight joint according to claim 3, characterized in that the surface of the surface member is given the same color and pattern as the front panel.

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