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  1. Home
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  3. 庄司歯車エンジニアリング
  4. We will provide an explanatory booklet: Why does it stop? The secret of the new self-locking deceleration mechanism 'shoji-lock'
CATALOG
  • Jun 12, 2013
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Jun 12, 2013

We will provide an explanatory booklet: Why does it stop? The secret of the new self-locking deceleration mechanism 'shoji-lock'

庄司歯車エンジニアリング 庄司歯車エンジニアリング
A completely new inline reducer that self-locks despite being a spur gear instead of a worm gear. Why does it self-lock? What is the internal structure like? We often get asked these questions. While showing a demo unit or a cut model can help people understand, such opportunities are rare. Therefore, we created a simple explanatory document. Please take a look at this, and if you're interested, feel free to check out our specific products and contact us.
Inline reducer for ingot lifting device.
Inline reducer for ingot lifting device.
Stainless steel winch (with lock release function) for clean rooms
Stainless steel winch (with lock release function) for clean rooms
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Jack 50KN manual/electric rack jack with self-locking function

A jack that can lift a load of 50 kN with a light manual operating force (input shaft torque of approximately 11 Nm). This is an application product of the new self-locking mechanism (Shoji Lock).

This is a jack developed for component maintenance. It is a manual jack with a high-efficiency self-locking mechanism utilizing spur gears, featuring the Shoji lock. The main body weighs 36 kg and is made of aluminum, designed with a focus on lightweight and manual operability. It has two input shafts (high/low), allowing for easy switching between quickly turning the handle when there is no load and applying force when there is a load, simply by changing the insertion of the handle. It can be widely used for work in areas without power, as well as for disaster preparedness and energy-saving measures. It can also be used electrically.

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[Stainless Steel Specification] Small Manual Self-Locking Winch 50kg

A stainless steel type of winch with a compact, lightweight, and sleek appearance has been introduced, featuring a self-locking function that can hold the load even when the operator's hands are off during operation.

The compact and lightweight winch "S-Winch," equipped with the already well-received new self-locking mechanism (Shoji-Lock), now comes in a rust-resistant stainless steel type. Due to high demand for compatibility with clean rooms, we have prepared a model with a maximum rope pulling force of 50 kgf. It achieves a compact and lightweight design with a sleek appearance, allowing for space-saving. It can rotate in both forward and reverse directions and locks in place when stopped. It can be widely used as a disaster response and energy-saving measure without the need for a power source. Additionally, since it is not a ratchet type, it can be used in various locations and operates very quietly, making it suitable for nighttime work and hospitals. Being made entirely of stainless steel, it can be used not only in clean rooms but also in marine and ship-related applications.

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Best-selling small winch: Manual self-locking winch 50kg

It is safe because the luggage will not fall even if you take your hands off the handle during operation. Furthermore, the main unit is compact and lightweight, allowing for space-saving.

The "S-Winch," a compact and lightweight winch equipped with a new self-locking mechanism (Shoji-Lock), is the best-selling model with a maximum rope pulling force of 50 kgf. It achieves a compact and lightweight design with a sleek appearance, allowing for space-saving. It can rotate in both forward and reverse directions and locks in place when stopped. It can be widely used in areas without power, as well as for disaster preparedness and energy-saving measures. Additionally, since it is not a ratchet, it operates very quietly, making it suitable for nighttime work and environments such as hospitals and stage equipment.

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Small winch manual/electric type self-locking winch 100kg

While winding up the load, it is safe as it does not fall even if the movement stops. No brakes are needed, so it can be wound up with an electric screwdriver. It is ideal for work in places without power.

The "S-Winch" is a compact and lightweight winch equipped with a new self-locking mechanism (Shoji-Lock). It is available in both manual and electric types, capable of handling a maximum rope pulling force of 100 kgf. It achieves a compact and lightweight design with a neat appearance, allowing for space-saving. It can rotate in both forward and reverse directions and holds the load when the movement is stopped. This enables operation with an electric screwdriver, making it suitable for use in areas where a large power supply is not available, as well as for disaster preparedness and energy-saving measures.

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Jack, rack type (without screws), manual with self-locking function, 50 kgf.

Faster and more efficient compared to screw jacks. It can be operated quickly and lightly by hand, has a compact design, and can hold loads without the need for a stopper, making it highly safe.

Unlike conventional screw jacks, this rack-type jack features an overwhelmingly fast rise and fall speed due to its high efficiency, making it easy to operate. It is also equipped with a unique self-locking mechanism that allows it to hold loads without brakes or stoppers, making it a groundbreaking jack. With a rated thrust load of 50 kgf, it can be operated manually with ease, advancing exactly 4 mm per rotation, which also makes it a round-number linear jack. Its significant advancement makes it a highly versatile rack jack and linear actuator. (For more details, please refer to catalog frame number SLM-050-4.0) *For more information, please visit our official website or feel free to contact us.

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Jack, rack type (without screws), manual self-locking function, 100 kgf.

Faster and more efficient compared to screw jacks. It can be operated quickly and lightly by hand, has a compact design, and can hold loads without the need for a stopper, making it highly safe.

Unlike conventional screw jacks, this rack-type jack features an overwhelmingly fast ascent and descent speed due to its high efficiency, making it easy to operate. It is also equipped with a unique self-locking mechanism that allows it to hold loads without brakes or stoppers, making it a revolutionary jack. The rated thrust load is 100 kgf, and it can be easily operated manually, advancing 3.2 mm per rotation, making it a highly versatile rack jack and linear actuator. (For more details, please refer to catalog frame number SLM-100-3.2) *For more information, please visit our official website or feel free to contact us.

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Jack, rack type (without screws), manual self-locking function, 200 kgf.

Faster and more efficient compared to screw jacks. It can be operated quickly and easily by hand, has a compact design, and can hold loads without the need for a stopper, making it highly safe.

Unlike conventional screw jacks, this rack-type jack features an overwhelmingly fast ascent and descent speed due to its high efficiency, making it easy to operate. It is also equipped with a unique self-locking mechanism that allows it to hold loads without brakes or stoppers, making it a revolutionary jack. With a rated thrust load of 200 kgf, it can be operated easily by hand, advancing exactly 3 mm per rotation, which also allows it to function as a round-number linear jack. Its significant advancement makes it a highly versatile rack jack and linear actuator. (For more details, please refer to catalog frame number SLM-200-3.0.) *For more information, please visit our official website or feel free to contact us.

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Jack, rack type / no screws used, self-locking electric/manual 100 kg

Compared to screw jacks, this is a hybrid type that can be operated with commercially available electric tools due to its high speed and efficiency, and it can also be operated manually by attaching a handle.

Unlike conventional screw jacks, this rack-type jack features an overwhelmingly fast ascent and descent speed, characterized by its lightweight operability due to high efficiency. Therefore, it can be operated quickly with common electric tools (drivers/drills). Additionally, it is equipped with a unique self-locking mechanism that allows it to hold loads without brakes or stoppers, making it a revolutionary jack. Moreover, it boasts excellent strength and durability while being designed to be lightweight and compact. It also employs an omnidirectional actuator that can accommodate upward, downward, and lateral movements. It is well-suited for rack-type electric cylinders and has a rated thrust load of 100 kgf. *For more details, please visit the official website or feel free to contact us.*

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Jack, rack type / no screws used, self-locking electric/manual, 200 kg

Compared to screw jacks, this is a hybrid type that can be operated with commercially available electric tools due to its high speed and efficiency, and can also be operated manually with a handle attached.

Unlike conventional screw jacks, this rack-type jack features an overwhelmingly fast rise and fall speed due to its high efficiency, making it easy to operate. As a result, it can be operated quickly with common electric tools (drivers/drills). Equipped with a unique self-locking mechanism, this revolutionary jack can hold loads without brakes or stoppers. It is not only strong and durable but also designed to be lightweight and compact. Additionally, it employs an omnidirectional actuator that can accommodate upward, downward, and lateral movements. It is also ideal for rack-type electric cylinders, with a rated thrust load of 200 kgf and a reduction ratio of 63. *For more details, please visit our official website or feel free to contact us.

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庄司歯車エンジニアリング
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Hyper CLT flooring panel

Interest from major construction companies | NETIS registration "Hyper CLT flooring"

  • NEW
  • PRODUCT

Hyper CLT sheets are gaining attention from construction companies, including major general contractors, as a new civil engineering material utilizing wood CLT. The reasons for this interest go beyond just lightweight and workability. They are appreciated for their unique characteristics, such as suppression of summer glare and radiant heat, reduction of metallic sounds, and CO2 fixation, which can address multiple challenges including safety measures, environmental considerations, and neighborhood concerns. Additionally, the 5×10 sheet is relatively lightweight at about 230 kg, making it easy to install, remove, and relocate on-site. Furthermore, Hyper CLT sheets are registered under the Ministry of Land, Infrastructure, Transport and Tourism's NETIS technology "TH-250021-A." This makes them advantageous for proposing new technologies in public works projects. The new combination of wood, NETIS, civil engineering, and CLT is beginning to expand as an option considered even in large-scale sites.

Sep 26, 2026

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Hino Smart Cabinet

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The Hino Smart Cabinet provided by Nichinichi Shimizu Machinery Co., Ltd. is a material management solution that allows for the management of factory tools and consumables like a vending machine. This system automates inventory management and ordering processes, preventing the risk of production stoppages due to stockouts and significantly reducing the burden of inventory tasks. The cabinet comes in various types, such as drawer-type and spiral-type, allowing for the proper storage of drills, measuring instruments, protective gear, and more according to their intended use. Furthermore, the history management function through user authentication accurately tracks "who took out what and when," contributing to loss prevention and cost reduction. Operating 24/7 with no maintenance required, it is introduced as an efficient tool to promote the digital transformation (DX) of factories.

Sep 25, 2026

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A must-see for small and medium-sized enterprises! Why not utilize tax incentives for capital investment and streamline operations?

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  • PRODUCT

What is the Small and Medium Enterprise Management Enhancement Tax System? This tax system provides preferential treatment for small and medium-sized enterprises that acquire new equipment based on a management enhancement plan certified under the Small and Medium Enterprise Management Enhancement Act and utilize it for designated businesses. The benefits include immediate depreciation or a tax credit of 10% of the acquisition cost. [Application Deadline] Products acquired by March 31, 2027. Some of our products are also eligible for this tax system. We encourage you to take advantage of this opportunity and consider equipment investment.

Sep 25, 2026

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[Case Study] Expanding Business Opportunities with New DM Proposal! - A compact bag-making machine that allows for the creation of original envelopes with free design options -

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Would you like to differentiate yourself from other companies by creating impactful envelopes? Introducing the "Western Envelope Bagging Machine EM-800," which supports small lots and variable production. This product automatically performs scoring, gluing, and folding processes on paper that has been die-cut into the shape of an envelope after the design has been printed, allowing for the creation of envelopes. By printing before bagging rather than doing a follow-up print on the envelopes after bagging, you can freely design your envelopes. It enables the creation of small lots, a variety of products, and high-value-added envelopes. We also have case studies of customers who have introduced the Western Envelope Bagging Machine and expanded their business. Please take a look.

Sep 25, 2026

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[Case Study] Automating inspections to reduce work errors and downtime waste. A fast and reliable camera inspection system!

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  • PRODUCT

【For Mailing Service Providers】 〇 Address Inspection Device This device recognizes the address portion of envelopes and postcards, performs sequential number checks, matches with master data, and simultaneously retains image logs. When outsourcing mailing operations, it is essential to conduct inspections prior to shipping due to the handling of personal information and privacy-related data. In addition to offline inspections, inline inspections linked with pressure-sealed postcard creation machines and inserting and sealing machines are also possible. We can flexibly accommodate integration with other equipment! 【For Manufacturing and Logistics Industries】 〇 Product Verification Inspection Device This device helps prevent errors in products picked before packaging. It reads the barcodes on picking lists, captures images of the picked products, and performs verification. 【For Printing Industry】 〇 Print Surface Inspection Device This device reads printed materials with a camera and matches them with PDF data. It detects printing defects, printing errors, and stains. The equipment introduced here is just an example. We can also customize solutions to meet customer needs, including the development of transport equipment, paper feeding devices, robot integration, and connections with other companies' machines. If you have any other issues such as appearance inspection, character recognition, or label inspection, we are also open to new development requests. Please feel free to consult us for more details.

Sep 25, 2026

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