PROBLEM TO BE SOLVED: To provide a locking device having a structure for inhibiting the rotation of a door of a pet circle, and improving assemblability while inhibiting an increase in the number of components.SOLUTION: There is no need to separately provide a member for assembling a control knob 40 to a door 30 because the control knob 40 is assembled into an accommodating recess 32 of the door 30 in a pet circle. The control knob 40 has a lever part 44 and a first pawl part 46 inserted into a first regulating hole 34B of the accommodating recess 32, and an engagement hook 48 constituted so as to be elastically deformable, and the engagement hook 48 is formed with a second pawl part 50 to be inserted into a second regulating hole 34C of the accommodating recess 32 so as to facilitate assembling the control knob 40 to the door 30. Since a first regulation surface 34B1 of the first regulating hole 34B is arranged closer to an opening side of the accommodating recess 32 than a second regulation surface 34C1 of the second regulating hole 34C, the lever part 44 and the first pawl part 46 can be easily inserted into the first regulating hole 34B.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2020,JPO&INPIT【課題】ペットサークルの扉の回転を阻止するための構造で、部品点数の増加を抑制しつつ組付性を向上する旋錠装置の提供。【解決手段】ペットサークルでは、操作ノブ４０が、扉３０の収容凹部３２内に組付けられているため、操作ノブ４０を扉３０に組付けるための部材を、別途設ける必要がなくなる。また、操作ノブ４０は、収容凹部３２の第１規制孔３４Ｂ内に挿入されるレバー部４４及び第１爪部４６と、弾性変形可能に構成された係合フック４８と、を有し、係合フック４８に、収容凹部３２の第２規制孔３４Ｃ内に挿入される第２爪部５０が形成されているため、操作ノブ４０を扉３０に容易に組付けることができる。しかも、第１規制孔３４Ｂの第１規制面３４Ｂ１が、第２規制孔３４Ｃの第２規制面３４Ｃ１よりも収容凹部３２の開口側に配置されているため、レバー部４４及び第１爪部４６を第１規制孔３４Ｂ内に容易に挿入させることができる。【選択図】図１
