Title:
PIPE JOINT HAVING FALL PREVENTION MECHANISM OF LOCK PIN
Document Type and Number:
Japanese Patent JP2019049159
Kind Code:
A
Abstract:
To provide a pipe joint using a spring that prevents a thick, heavy, and tough lock pin from falling when break and cut of the spring is generated.SOLUTION: A pipe joint having a fall prevention mechanism of a lock pin 4 is an interior pipe 2 inserted into a hollow inner wall of a vertical pipe 1, engagement nails 41 provided at both ends of the lock pin 4 are inserted to couple upper and lower vertical pipes 1, the upper and lower vertical pipes 1 provided with a spring 5 pressing the engagement nails 41 of the lock pin 4 to maintain the engagement are coupled, the spring 5 has a cone shape, both lower side parts 52 of the spring press a pipe inner wall of the vertical pipes, a cone-shaped top part 51 presses the lock pin 4, one end of the lower side part 52 is provided with a U-shaped folding part 55 which is folded back to form a pressing part 56 and presses the lock pin 4, and an engagement fixing part 58 is provided at the end to engage a specific portion of the lock pin 4.SELECTED DRAWING: Figure 1
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Inventors:
TAKAMORI NORITOSHI
Application Number:
JP2017174440A
Publication Date:
March 28, 2019
Filing Date:
September 12, 2017
Export Citation:
Assignee:
SHINKO KK
International Classes:
E04G7/20
Domestic Patent References:
| JP2006233482A | 2006-09-07 | |||
| JPH07292958A | 1995-11-07 | |||
| JP2003003665A | 2003-01-08 |
Attorney, Agent or Firm:
Yohei Tagami