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Pipe frame processing process

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process 01

  • Final processing is done in our own factory to maintain high quality.

  • We use pipes manufactured at domestic partner factories and apply our own safety standards to materials.

  • Designed based on human body data and usage evaluation, pursuing strength, safety, and ease of use.

  • We select the most suitable parts and, if necessary, develop original parts.

  • We only use products that have passed testing at our own company or a third-party testing institution.

  • We keep all kinds of pipe frames in stock at all times, enabling us to respond to repairs quickly.

  • Returned items are always inspected and improvements are made.

  • We use robot welding to achieve a uniform, high-precision finish.

Urethane foam bonding process

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process 02
  • To ensure a comfortable sitting posture, urethane foam is used as the cushioning material.
  • The hardness and shape of each part is designed, and comfort and durability are evaluated.
  • The bonding process is a time-consuming process, but an important one that supports comfort and quality.
  • The cushion structure developed through industry-academia collaboration has been patented (Patent No. 5886157).
  • All finished by hand to ensure quality within standards.

Side fabric cover production and meter inspection process

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Process 03
  • We create patterns and adjust the final specifications in-house.
  • Sewing is done in-house, sourced domestically and overseas, and needle inspections are always carried out twice before delivery.
  • If a foreign object is detected, it is discarded and the inspection results are recorded.
  • The first inspection is done at the sewing site, and the second is done at our own factory.
  • All work is done by hand to ensure quality within standards.

Assembly and packaging process

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process 04
  • Attach the side fabric cover and parts to the main body to complete.
  • We thoroughly visually inspect each part and product and do not use defective products.
  • Check that the reclining and rotation functions work.
  • Dirt and lint are also removed through visual inspection.
  • Packed in plastic bags and cardboard, labeled and shipped.
  • Although the work is mainly done by hand, we maintain high quality within the standards.

Direct EC site External site

Yamazaki Co., Ltd.

439-1 Toguchi, Sakado City, Saitama Prefecture, 350-0276

Telephone number 049-281-3388

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Copyright(C) 2025 Yamazaki Co., Ltd.

Keirin
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