Changed the outer frame fixing screws of the opening door series.

Utility aluminum doors that cater to a wide range of needs.

This is a flush door that meets a wide range of needs, from large doors for the entry and exit of machinery from inspection openings to air-tight doors for super clean rooms that require strict airtight performance for the entry and exit of people and goods. The DR30 is a slim and lightweight aluminum flush door suitable for inspection openings and doors for people, commonly referred to as "man doors," using latch-type locks. The DR34 is a slim and lightweight aluminum flush door that allows for the integration of electric locks using a dedicated outer frame, and it can also accommodate interlock and access control systems. Its frame has a small profile and dimensions, giving it a neat appearance. There are the "DR30," which uses latch-type locks, and the "DR34," which enables the integration of electric locks with a dedicated outer frame. The DR40 is a versatile aluminum flush door that accommodates a wide range of sizes, from large doors for the entry and exit of machinery from inspection openings to those requiring high airtightness for super clean rooms. It meets airtight performance grade A-4 with both four-sided and three-sided frames.

• Hardware Doors, Handles and Locks
• Aluminum alloy door

It is a standard machine hatch.

A detachable machine hatch that allows for an opening size that is difficult to achieve with a door. Some work is required for detachment, so infrequent opening and closing is a condition. Additionally, the internal aluminum frame of the TH40 is sturdier and can accommodate larger sizes compared to the TH30. When the height dimension increases, it is recommended to use a plus bar to increase the engagement with the outer frame. ◇TH40◇ The TH40 can accommodate a large size with an effective height dimension of 4500mm. Multiple machine hatches can be removed one by one and then put back in place. The three-sided frame specification is affected by unevenness in the floor, so it is necessary to ensure a level floor. The four-sided frame specification, which emphasizes airtightness, tends to have the lower frame obstructing, so it is common to make the lower frame detachable. Additionally, when the height dimension increases, it is recommended to use a plus bar to increase the engagement with the outer frame. ◇TH30◇ The TH30 can accommodate an effective height dimension of up to 3000mm. The basic functions are the same as the TH40. Some work is required for detachment, so infrequent opening and closing is a condition.

• Special function opening
• others

No unevenness, easy to manage hygiene! Detachable panel flat type.

Flat-type removable machine hatch with minimized protrusions ◇THF40◇ Windows and doors installed on the walls of clean rooms need to eliminate protrusions that could obstruct airflow as much as possible. This is a flat-type removable machine hatch that reduces the number of tightening handles and grips for each panel. Additionally, even for tall machine hatches, no ladder or similar equipment is required for the removal and installation process. ◇THF50◇ Typical removable machine hatches have exposed tightening handles and grips to secure the removable panels. In clean rooms, dust and debris can accumulate on these hardware protrusions, and the protrusions can disrupt airflow within the clean room, potentially affecting product quality. The full flat-type removable machine hatch "THF50" features a design that minimizes surface protrusions to the utmost, meeting the highest JIS airtightness performance grade, A-4. It is the ultimate removable machine hatch for clean rooms, ideal for industrial clean rooms (ICR) in semiconductor and precision manufacturing, as well as for bio clean rooms (BCR) that consider GMP and HACCP standards.

• Interior/Interior Doors
• Special function opening
• Interior construction

Outstanding visibility and stylish! A machine hatch with excellent display effects.

It is ideal when expecting display effects with a detachable machine hatch. Even for the installation of large windows, which can often look awkward with panel types, TK offers a smart see-through type. By assembling transparent resin panels within the frame, a smart see-through type machine hatch is achieved.

• Synthetic Resin Plywood
• Special function opening
• others

The size and specifications are completely customizable! A stylish framed door.

This is a lightweight frame door that can accommodate from the inspection opening to the large door for the entry and exit of machinery. There are options that can use the Gremon mechanism and electric locks. You can choose between two types: one with a middle rail that separates the upper and lower panels, and one without a middle rail. This lightweight frame door is suitable for inspection openings and doors for human entry and exit, commonly referred to as "man doors." There are two models available: "DK30," which uses a latch-type lock, and "DK34," which allows for the integration of an electric lock using a dedicated resin cassette and a dedicated outer frame. You can choose between the middle rail version that separates the upper and lower panels and the version without a middle rail. The DK40 is an aluminum frame door specifically designed for large doors for the entry and exit of machinery. By increasing the vertical frame size, it allows for the installation of the Gremon mechanism and electric locks, achieving a larger frame door. It can also be used when you want to secure a large window in a large door.

• Aluminum alloy door
• others

Our company will be exhibiting at the "Green Cross Exhibition 2026 in Sapporo." Duration: September 16 (Wednesday) to 18 (Friday), 2026 - 16th (Wednesday) 10:00 AM to 5:00 PM - 17th (Thursday) 9:00 AM to 5:00 PM - 18th (Friday) 9:00 AM to 3:00 PM Venue: Sapporo City Sports Exchange Facility Tsudome (Sapporo City, Hokkaido) We look forward to your visit.

Japan is one of the top 10 countries in the world with frequent earthquakes. The 2020 White Paper on Land, Infrastructure, Transport and Tourism has also reported an increase in the probability of major earthquakes occurring. Regarding the Nankai Trough earthquake, the probability of an earthquake with a magnitude of 8 to 9 occurring within the next 30 years is estimated to be 70 to 80%. At Hotron, we recommend the introduction of seismic devices for earthquake countermeasures in buildings and equipment. The seismic device 'HK-2' is a product that automatically performs various controls that have been pre-set when it detects strong shaking equivalent to a seismic intensity of 5 lower or higher. For example, it can automatically execute actions such as: "Open automatic doors and gates to secure evacuation routes and access for emergency vehicles" "Transmit signals to the control room and stop facility equipment" "Unlock the keys to locked lockers" "Automatically play voice guidance" For more details, please download the materials or contact us.

We have introduced Majesta Fragrance to a nightclub in Yokosuka City, Kanagawa Prefecture, creating a fragrant atmosphere throughout the floor. The model we have introduced is the "MF-02S," which costs 8,800 yen per month (tax included). The scent you have chosen this time is "Sabon," a high-quality soap fragrance reminiscent of luxury hotel amenities. Its clean and transparent refreshing scent spreads throughout the entire floor, warmly welcoming customers who visit. By introducing scent design to the nightclub, we can enhance the extraordinary experience and create a memorable space that lingers not only visually but also through "scent." Majesta Fragrance offers a rental service for commercial aroma diffusers, and we also provide a free trial installation. If you are interested in scent design, please feel free to contact us.

In the July 8, 2026 issue of Air Conditioning Times, we featured "Flex Chamber" and "SS Premier" in a duct special.

SS Premier has won an award at the 24th Environmental and Equipment Design Awards. This award is organized by the General Incorporated Association of Architectural Equipment Comprehensive Association and recognizes outstanding efforts in environmental and equipment design. We will continue to strive for further improvements in quality and technology.