Sealing hole construction technology

■Overview of Ceiling Space Fire Alarm Device 1. It consists of a mounting frame and a cover, with the ceiling finishing material fitted into the cover and a stand combined with the mounting frame, forming a ceiling space fire alarm device. 2. The ceiling space fire alarm device is attached to the ceiling finishing material, and a wireless linked fire alarm unit is mounted on the top of the stand, while the main unit is attached to the cover, allowing for the detection of fires in both the ceiling space and the room simultaneously. 3. A fire alarm can be mounted on the top of the stand, and an additional buzzer can be attached to the cover, with the devices connected by signal wires. 4. A fire alarm unit can be mounted on the top of the stand, and the main unit can be attached to the cover. A hole is drilled from the room into the ceiling finishing material, and the ceiling space fire alarm device is fitted into that hole, allowing for easy and aesthetically pleasing installation without discomfort. 5. Fire testing and inspection of the main unit attached to the cover and the ceiling space unit mounted on the top of the stand can be easily performed from inside the room. 6. For example, if a fire occurs in the ceiling space of a residence, the ceiling space fire alarm (subunit) detects the fire and triggers an alarm, while the fire alarm (main unit) in the cover also sounds an alarm inside the room. This allows for early detection of fires in the ceiling space.

■Overview of the Joint Inspection Opening 1. It consists of a mounting frame and a cover, with the ceiling finishing material fitted into the cover. The mounting frame is attached to the ceiling finishing material, and a stand is combined with the supporting material of the mounting frame, with a joint box mounted on top of the stand. 3. A hole is made in the ceiling finishing material from indoors, and the main body is fitted and installed into that hole. It can be installed neatly and easily without any discomfort. 4. It is installed on the ceiling surface at the connection (joint) location of the electrical wires in the ceiling space from indoors. 5. The cover is opened to connect the electrical wires in the ceiling space. Once the cover is closed, the installation is complete. Additionally, the cover can be opened for confirmation and inspection of the connection points. Connection replacement work can also be performed. 6. By providing a joint inspection opening in the ceiling, it allows for the inspection of electrical wire connections (joints) and connection points from indoors. Moreover, it enables connection replacement work for miswiring or connection failures without damaging the ceiling finishing material. 7. By periodically inspecting the connection points of the electrical wires in the ceiling space, it is possible to prevent equipment damage and fires caused by abnormal heat due to overload or connection failures.

■Overview of the Sealing Unit 1. It consists of a mounting frame and a cover, with the cover fitted with ceiling finishing materials. The mounting frame can be attached to a sealing hole (round cable entry point) in the ceiling finishing materials, and the cover is equipped with wiring devices and various sensors. 2. A hole is made in the ceiling finishing material from inside the room, and the sealing hole is fitted and installed into that hole. The ceiling finishing material with a hole is then fitted into the cover, wiring devices are attached to the cover, and the cover is finally attached to the main body. 3. The cover of the sealing hole is opened, and a cable catcher or arm is inserted through the hole into the ceiling space. Wires are then routed from inside the room to the ceiling space and connected to the wiring devices attached to the cover. 4. For example, a cable catcher (structured like a fishing rod) is inserted from one sealing hole into the ceiling space and extended. A wire is then hooked onto the tip from the other sealing hole, and by pulling the cable catcher back, the wire is routed into the ceiling space and connected to the wiring devices attached to the cover. 5. In this way, the entry, wiring, and installation of devices in the ceiling space can be completed collectively after the ceiling work is finished.

■Overview of the Ceiling Stand 1. It consists of a mounting frame and a lid, with the lid fitted with ceiling finishing material. The mounting frame can be attached to the ceiling finishing material, and the stand is combined with the supporting material of the mounting frame (inspection port with detector bracket). 2. A hole is drilled into the ceiling finishing material from indoors, and the finishing material is fitted into that hole. Additionally, the ceiling finishing material with a hole drilled in the lid is fitted, and the lid is attached to the main body to complete the installation. 3. The necessary number of holes is drilled into the ceiling finishing material from indoors. A cable catcher (structured like a fishing rod) is inserted through one of the holes into the ceiling space and extended, while a wire is hooked onto the tip from the other hole, allowing the cable catcher to be pulled back, thus wiring the electrical wire into the ceiling space. 4. The wired electrical wire is connected (wired) to the fire detector mounted on the ceiling stand indoors. 5. The ceiling stand is fitted and installed from indoors into the hole made in the ceiling finishing material. The ceiling finishing material with a hole drilled in the ceiling stand lid is fitted, and the lid is attached to the main body to complete the installation. 6. The lid of the ceiling stand is opened, and a fire test device is inserted into the hole in the lid, allowing for fire testing, operational confirmation, and inspection of the ceiling space fire detector from indoors.