Title:
UNLOCKING STRUCTURE OF JOINT LOCK
Document Type and Number:
Japanese Patent JP2023035511
Kind Code:
A
Abstract:
To provide an unlocking structure of a joint lock which can secure the aesthetic appearance of a door for inspection of a facility or the like, which does not require time and labor for opening the door, whose number of parts can be reduced, and which can be provided at low cost.SOLUTION: An engagement groove 8 is formed in the surface of a door 1 facing a joint 3 in the depth direction, and a key 10 is provided with a branch rod 13 branched in the midway in the axial direction of a key shaft 12. When the tip of the key shaft 12 is inserted into a keyhole 5 at the back of the joint 3 and rotated, a latch 6 of a lock body 4 attached to a door frame 2 retracts and separates from a latch receiving section 7 of the door 1, and the branch rod 13 engages with the engagement groove 8 and when the key 10 is pulled toward the front in such a state, the door 1 is pulled toward the front together with the key 10, and before the key shaft 12 is removed from the keyhole 5, the back side of the door 1 from the latch receiving section 7 reaches the position of the tip of the latch 6 and after the key shaft 12 is removed from the keyhole 5, the latch 6 protrudes to open the door 1.SELECTED DRAWING: Figure 7
Inventors:
NAKATSUKA SATOSHI
SUZUKI TAKESHI
SUZUKI TAKESHI
Application Number:
JP2021142414A
Publication Date:
March 13, 2023
Filing Date:
September 01, 2021
Export Citation:
Assignee:
SHIBUTANI KK
International Classes:
E05B19/00; E05B3/00; E05B65/06
Attorney, Agent or Firm:
Naoya Kamada
Bunji Kamata
Yaichiro Nakatani
Masaharu Okamoto
Bunji Kamata
Yaichiro Nakatani
Masaharu Okamoto