庄司歯車エンジニアリング Official site

Increased number of adoptions: compact reduction gears, winches, and rack jacks capable of load retention.

Self-locking winches, rack jacks, and reducers are widely used in various devices and fixtures. The key factors are lightweight, smart, and compact!

We have developed numerous applied products equipped with a unique load-holding function (Shoji-lock) that have received positive feedback from our customers. (Patents obtained both domestically and internationally) <Shoji-lock Product Features> - When rotation is applied from the input side, the output side decelerates and transmits power, but rotation is not possible from the output side = self-locking function. This means that it can hold a load at the desired position without the need for brakes. - Compared to worm gear reducers with the same self-locking function, it is highly efficient. Additionally, while the worm has input and output axes that are perpendicular to each other, our design has the input and output shafts aligned in a straight line (in-line), making it quite compact and allowing for space-saving and weight reduction. - Unlike ratchets or one-way clutches, it can hold a load at any position when motion is stopped, regardless of the direction of rotation. Furthermore, there is no ratchet noise, making it suitable for use in quiet environments. - It features a basic sealed structure (IP65) and is maintenance-free. - We offer a variety of applied products, including gear reducers that utilize this self-locking mechanism, winches, and linear actuators (rack jacks). *For more details, please visit our official website or feel free to contact us.

Shoji Gear Engineering Co., Ltd. Official Website

basic information

<Inline Reducer = S Reducer> - Higher efficiency compared to worm reducers - Much more compact design and lightweight compared to large worm gears - Lineup of manual models compatible with SRM 5 to 100 kgm - Lineup of electric models compatible with SRE 3 to 50 kgm <Winch = S Winch> - Load is wound up with a handle and held in place when the handle is released - Unlike a ratchet, it can hold position in both forward and reverse rotation - Can be driven by commercially available electric tools (drill drivers) - Available in a type with a lock and release function for quick wire release - Lineup of manual models compatible with SWM loads of 50 to 300 kg - Lineup of electric (tool) models compatible with SWE loads of 50 to 300 kg - Motor built-in type SWP is also available <Rack Jack = S Linear Actuator> - Raises and lowers a round rack bar and holds the load in place - Additional guide rods can be added in case buckling is a concern - Lineup of manual models compatible with SLM loads of 50 to 200 kg - Lineup of electric models compatible with SLE loads of 100 to 800 kg

Price range

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Applications/Examples of results

Winches (hoisting machines) can be operated manually or with an electric screwdriver even in places without power, making them useful during disasters! (For example: transporting goods to upper floors of a building where the elevator is broken.) We also offer a rust-free stainless steel type! Gear reducers are widely adopted in factory lines as tilting and reversing devices and jigs. They are ideal for tasks performed in a tilted position! The inline design allows for a compact configuration. The "shoji-lock" that stops movement holds the load at the desired position with an absolute stop. It assists in this fundamental operation of not only transmitting power but also holding the load. On land... for automotive manufacturing lines, solar panel manufacturing lines, and nuclear power plants. At sea... for opening and closing ship steering control panels, for underwater survey retrieval, and for raising and lowering the roofs of houseboats. In the air... for maritime rescue, power line repair work, and high-rise building cleaning gondolas. They are used in various situations for a wide range of applications. In particular, stainless steel and aluminum products designed for clean rooms are widely adopted in the semiconductor industry. *For more details, please refer to our case studies and website.

Detailed information

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The load-holding function equipped reduction mechanism (shoji-lock) has been developed for application products such as winches and rack jacks since the early 2000s. Steady sales activities have borne fruit, and it has begun to be adopted for various applications. Unlike conventional worm reduction gears with self-locking functions where the input and output shafts are orthogonal, our design features them in a straight line (inline), allowing for a compact design and space-saving, which has received high praise and resulted in a diverse range of practical examples. (Patents have been obtained in Japan, the United States, the EU (Germany, France, the UK), China, South Korea, and Taiwan.) Furthermore, starting in April 2023, we launched a new overseas parts procurement business, beginning with Vietnam. Currently, a majority of our parts are procured overseas, and leveraging our achievements and network, we aim to assist companies struggling with cost reduction in parts procurement.