The Challenge of Redefining

　Our aim is “To provide a continuous high level of safety and security through our important security products backed by our technical capabilities of the whole company’s collective efforts, while spreading them all over the world.” Based on this intent, NejiLaw was established in 2009 as a manufacturer of high-performance and advanced joining technology with “L/R Neji” as its main product.
Screws have a history of over 2000 years. The basic functions of the screw structure include the movements of objects and power transmissions. In addition, screws have the function of fastening and joining things.
The application of screw fastening body is firmly established as the most widely used mechanical element of industrial products to this day. This screw fastening body, that is, screws are naturally required not to be loosened.
　However, conventional screws carry the fate of being loosened inevitably due to their spiral structure.
Therefore, NejiLaw decided to re-examine the conventional spiral structure itself that depends on the frictional force between the screw threads of the conventional male screw and female screw. Since the first invention of the screw fastening body that broke the spiral structure principle, we have repeated many years of trial and error, invention after invention and research after research. The development was extremely difficult. At that time, there wasn't even a lathe in the apartment so called “Laboratory”. The difficulties continued. Although we finally were able to load the lathe and start the turning process, the L/R Neji made by the lathe had the blade scraped off and the screw threads just fell apart. It was far from a dream come true to create the shape we wanted. However, if you give up, the dream ends there. No one on the development team gave up.
After carefully overcoming the challenges that emerged one after another, the team finally got to one finished and completed form. It was the moment when the idea” L/R Neji” renewing the history of screws in 2000 years that finally came true. It has been nearly 20 years since the first invention of L/R Neji.
　“L/R Neji” is composed of an epoch-making male screw that has a special three-dimensional screw thread that does not have a spiral structure, and two special female screws that are compatible with both the right-hand spiral structure and the left-hand spiral structure. With this structure, “L/R Neji” can be fastened without depending on the frictional force. Achieving this was a gift given by the research and development efforts of all members of NejiLaw, working night and day until completion.

From “Screw” to “Neji ”

In the process of developing “L/R Neji”, we have independently invented and developed all things related to manufacturing in order to overcome many difficulties. For instance, from manufacturing methods to manufacturing tools, devices and inspection machines to produce manufacturing tools, moreover, quality inspection methods for “L/R Neji” and inspection equipments. At last, we finally came to a conclusion that the optimum thread cross-sectional shape of “L/R Neji” was completely different from the conventional “Optimum thread angle = 60°". It was concluded that 70°was the strongest. This result was revolutionary and passed the bounds of common senses.
The in-house strength evaluation shown here is based on the question, “Under what condition makes the thread strength even stronger?" Therefore, hypotheses and tests were conducted hundreds and thousands of times repeatedly in tensile strength tests, tensile fatigue strength test, screw tightening test, torsional fatigue strength test and impact vibration screw looseness test etc. The results clearly proved that the “L/R Neji” had the same or higher strength compared to the conventional screws if the requirements were satisfied.
　Hiroshi Michiwaki, the inventor of “L/R Neji”, set a grand goal of "At first, promote the systematization of unified standards for“L/R Neji”" when NejiLaw was founded. In just 7 years from this concept, NejiLaw has completed the basis of “L/R Neji Standard”, a standard system equivalent to the “Screw Standard” that has been cultivated in its long history for more than 200 years since the Industrial Revolution. Since its founding in 2009, Michiwaki has aimed to build this unknown new standard system. From the concept of new (New), next era (Next), from Japan (Nippon), and Screws Law (Neji’s Law) system, the company is named NejiLaw, and the new standard system is named N standard. We started with the hope of spreading this new standard in the coming millennium.

Basic structure of “L/R Neji”
“L/R bolt”with its own three-dimensional structure, both right-hand thread nut and left-hand thread nut can be assembled.

“L/R Neji” “Permanent Lock Type”
Due to the ratchet structure engraved on the joint surface of the right-hand thread nut and the left-hand thread nut, we have achieved a fastening that does not loosen.

“L/R Neji” “Removable Lock Type”
Left-hand and right-hand thread nuts are integrated while being freely rotatable.
Not only do they stabilize at any position, but they can also be removed.

About “L/R Neji”

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