Widely adopted in automobile factories: self-locking reducers, winches, and jacks.
Winches, rack jacks, and reducers that hold loads without brakes are widely adopted in automobile factories, with the key factors being lightweight, compact design, and space-saving!
We have developed a number of applied products featuring a unique load-holding function with a deceleration mechanism (shoji-lock), which have been well received by our customers. <Features of shoji-lock products> - 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 no brakes are needed, and loads can be held at the desired position. - Compared to worm gear reducers with the same self-locking function, our products are highly efficient. Additionally, while worms have input and output axes that are orthogonal, our input and output shafts are aligned in a straight line (in-line), making them significantly more compact, space-saving, and lightweight. - Unlike ratchets or one-way clutches, loads can be held at any position where motion is stopped, regardless of the direction of rotation. Furthermore, there is no ratchet noise, making them suitable for use in quiet environments. - They feature a basic sealed structure (IP65) and are maintenance-free. - We offer a range of applied products, including gear reducers, winches, and linear actuators (rack jacks), that leverage this self-locking mechanism. - Stainless steel versions are also available for each model, suitable for clean room applications. *For more details, please feel free to contact us.
basic information
<Inline Reducer = SRM/SRE Series> - Suitable for various tasks as it can hold the workpiece during tilting and reversing. - Higher efficiency compared to worm reducers. - Compact design and lightweight achieved as the input and output shafts are aligned (inline), unlike bulky worms. - Selection based on output torque; detailed lineup available in the catalog. <Winch = SWM/SWE Series> - Loads can be wound up with a handle, and the load is held when the handle is released, making it suitable for various tasks. - Unlike a ratchet, it can hold position in both forward and reverse rotation without the need to release the brake. - Available types that can be driven by commercially available electric tools (drill drivers). - Manual SWM models support loads of 50 to 100 kg. - Electric (tool) SWE models support loads of 50 to 300 kg. <Rack Jack = SLM/SLE Series, SLW> - Holds the load when a round rack rod (commercially available) is raised and stopped, suitable for various tasks. - Additional guide rods can be added in case buckling is a concern. - Manual SLM models support loads of 50 to 400 kg. - Electric SLE models support loads of 100 to 400 kg. - Some models can be connected in pairs for simultaneous operation (without intermediate shaft).
Price information
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Delivery Time
Model number/Brand name
SWM/SWE (winch) SRM/SRE (reducer) SLM/SLE/SLW (rack jack)
Applications/Examples of results
Usage: Used for tilting and inverting operations as factory jigs, adopted for the opening and closing parts of furnace lids, tilting parts of mixers, tilting parts of liquid containers, opening and closing of partitions, and operations in places without power (using drill drivers), positioning jigs. Track Record: Semiconductor-related, vacuum equipment manufacturers, food machinery, automotive factories, plant-related, various machinery manufacturers (mixing and powder), furnace-related, nuclear power-related, shipbuilding and marine-related, defense and military-related, conveying equipment, construction and housing-related, etc. "shoji-lock" to stop movement Not only does it transmit power, but it also assists in the basic operation of wanting to hold a load. On land: automotive manufacturing lines, semiconductor manufacturing equipment, plant-related, etc. At sea: for opening and closing ship gates, for raising underwater survey equipment, for raising and lowering the roofs of houseboats, etc. In the air: for high-altitude work devices, for power line repair work, for industrial unmanned aerial vehicles, etc. It is adopted in various situations and for various purposes. In particular, stainless steel products are widely used in the semiconductor sector. For more details, please refer to the catalog and website.
Detailed information
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SLW Series SLW for 100 kg: A specification that combines our winch and rack jack. The rack rod rises and falls by 11.5 mm per rotation, and of course, it holds the load even when the operation stops. Compact with multiple applications! A version for 300 kg can also be produced.
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SRM Series As shown in the image, it is used in tilting and inversion devices. It holds the load when tilted (self-locking) and is very compact, which has received positive feedback.
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Special Product Case 1 We handle a large number of all-stainless steel products required in clean rooms for semiconductors, medical devices, food machinery, and marine fields. The photo shows an electric tool winch mounted inside a buoy for underwater surveys. The input shaft is hexagonal, allowing it to be driven with commercially available sockets. By attaching a dedicated manual speed increaser on the opposite side of the input shaft, it becomes a hybrid type that can be manually wound up quickly.
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Case Study 2 of Special Products Even with inexpensive induction motors, there are many cases where they can self-lock without the need for brakes, or are used in combination with brake-equipped motors for double safety. The photo shows an aluminum construction (A7075, black anodized) for weight reduction and rust prevention.
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Special Product Case 3 Achievements with a semiconductor equipment manufacturer. It is possible to manufacture a specification where a belt is used to lift the load instead of a wire, made entirely of aluminum (A7075), as shown in the photo.
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Case Study 4 of Special Products Medical-related achievements. This type uses fine strings to lift loads instead of wires. The photo shows a steel product treated with electroless nickel, which can be finished more cheaply than all stainless steel or aluminum.
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Case Study of Special Products 5 Our lineup includes the SRM-005-11, a compact inline reducer made entirely of stainless steel. The input and output shafts are neither orthogonal nor offset; they are aligned in a straight line, yet it self-locks, making it very compact. It is particularly suitable for tilting devices and similar applications.
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Special Product Example 6 We have added guide rods to our SLM-050-4.0 small rack jack in our lineup, creating a twin shaft to address issues such as buckling. As shown in the photo, flanges can also be attached and manufactured at both ends. Please compare it to a cigarette. It is very compact.
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Case Study 7 of Special Products The SLM-D type responds to the request to "raise and lower two rack rods simultaneously" in the SLM series. By connecting two rack jacks with a connecting pipe, it is possible to synchronize the two rack rods. Of course, it comes with a load-holding function, and a quite compact design is achievable.
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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.