フリクション機構１１は、フランジ部９ａの一側部と第１取付部材８の側板８ｂとの間にヒンジシャフト９の円形軸部９ｄをその中心部軸方向に設けた円形挿通孔１３ａへ挿通させると共に、その縁部に設けた第１係止片１３ｂをフランジ部９ａに設けた第１係止部９ｇと係合させている第１フリクションプレート１３と、フランジ部９ａと第２取付部材１０との間にその中心部軸方向に設けた円形挿通孔１４ａへヒンジシャフト９の第２変形軸部９ｃを挿通させると共に、その縁部に設けた第２係止片１４ｂをフランジ部９ａに設けた第２係止部９ｈへ係止させた第２フリクションプレート１４と、第２取付部材１０の軸受部１０ａに設けたカム部１０ｃと接する側にカム部１５ｂを有し、互いのカム部１０ｃ、１５ｂを当接した状態でその中心部軸方向に設けた変形挿通孔１５ａへヒンジシャフト９の第２変形軸部９ｃを挿通させて当該ヒンジシャフト９と共に回転するように成したカム部材１５と、第２フリクションプレート１４に当接してその中心部軸方向に設けた挿通孔１６ａへヒンジシャフト９の第１変形軸部９ｂと第２変形軸部９ｃにかけて挿通させて設けた複数の皿バネ１６（或はスプリングワッシャー）と、この皿バネ１６に当接して、その変形取付孔１７ａをヒンジシャフト９の端部に嵌めてかしめて固定された固定ワッシャー１７とから成り、この固定ワッシャー１７をヒンジシャフト９の端部へ当該ヒンジシャフト９の端部をかしめて固定する圧力により、皿バネ１６を介してカム部材１５のカム部１５ｂが第２取付部材１０の軸受部１０ａに設けたカム部１０ｃに圧接し、第２フリクションプレート１４がフランジ部９ａと第２取付部材１０の軸受部１０ａとの間に圧接される構成である。尚、第１フリクションプレート１３はフランジ部９ａの他側面と第１取付部材８の側板８ｂとの間に圧接される。
The friction mechanism 11 inserts the circular shaft portion 9d of the hinge shaft 9 between the one side portion of the flange portion 9a and the side plate 8b of the first mounting member 8 into a circular insertion hole 13a provided in the central portion axial direction. The first friction plate 13 engaging the first locking piece 13b provided on the edge with the first locking portion 9g provided on the flange portion 9a, and the flange portion 9a and the second mounting member 10 A second deforming shaft portion 9c of the hinge shaft 9 is inserted into a circular insertion hole 14a provided in the center axial direction therebetween, and a second locking piece 14b provided on the edge thereof is provided in the flange portion 9a. The second friction plate 14 locked to the two locking portions 9h and the cam portion 15b on the side contacting the cam portion 10c provided on the bearing portion 10a of the second mounting member 10 have a cam portion 10c, 15b. In contact with The second deformation shaft portion 9c of the hinge shaft 9 is inserted into the deformation insertion hole 15a provided in the central axis direction so as to rotate with the hinge shaft 9 and the second friction plate 14 abuts. A plurality of disc springs 16 (or spring washers) provided to be inserted through the first deformation shaft portion 9b and the second deformation shaft portion 9c of the hinge shaft 9 into an insertion hole 16a provided in the center axis direction of the lever, It comprises a fixed washer 17 that abuts against the disc spring 16 and is fixed by crimping its deformation mounting hole 17a to the end of the hinge shaft 9, and this fixed washer 17 is connected to the end of the hinge shaft 9 by the hinge shaft 9 the pressure for securing an end of 9 by caulking, cam the cam portion 15b of the cam member 15 via the disc spring 16 is provided in the bearing portion 10a of the second mounting member 10 Pressed against the 10c, a structure in which the second friction plate 14 is pressed against between the bearing portion 10a of the flange portion 9a and the second mounting member 10. The first friction plate 13 is pressed between the other side surface of the flange portion 9 a and the side plate 8 b of the first mounting member 8.
次に、安定停止手段７について説明する。この安定停止手段７は、当該ヒンジシャフト９の第４変形軸部９ｆをその中心部軸方向に設けた変形挿通孔１８ａへ挿通させてヒンジシャフト９に回転を拘束されて取り付けられたテーパー部材１８と、このテーパー部材１８のテーパー外周部１８ｂにそのテーパー湾曲部１９ａを当接させて第１取付部材８の第１取付プレート部８ａ上にヒンジシャフト９の軸方向へスライド可能に設置された押圧部材１９と、第１取付部材８の取付板８ｃに設けた取付孔８ｇへＥリング２０を介して取り付けた支持ピン２１にその軸着孔２２ａを取り付けてヒンジシャフト９の軸方向左右へ揺動可能に取り付けられる共に、それ自身に設けた係合凹部２２ｂを押圧部材１９の係合凸部１９ｂと係合させて成る樹脂材質（又は熱可塑性樹脂）の揺動部材２２と、で構成されている。尚、テーパー部材１８と側板８ｂとの間にその中心部軸方向に設けた挿通孔２５ａへヒンジシャフト９の円形軸部９ｄを挿通させて介在させたものはスペーサー２５である。
Next, the stable stop means 7 will be described. The stable stopping means 7 is a taper member 18 attached to the hinge shaft 9 by restricting the rotation by inserting the fourth deformation shaft portion 9f of the hinge shaft 9 into a deformation insertion hole 18a provided in the axial direction of the central portion. And a taper outer peripheral portion 18b of the taper member 18 with its taper curved portion 19a abutting on the first mounting plate portion 8a of the first mounting member 8 so as to be slidable in the axial direction of the hinge shaft 9 a member 19, swinging mounting the shaft attachment hole 22a to the support pin 21 mounted through the E-ring 20 into the mounting hole 8g formed in the mounting plate 8c of the first mounting member 8 in the axial direction left and right hinge shaft 9 The oscillating member 22 made of a resin material (or thermoplastic resin), which is attached so as to be able to engage with the engaging convex portion 19b of the pressing member 19 with the engaging concave portion 22b provided on itself. , In is configured. A spacer 25 is formed by inserting the circular shaft portion 9d of the hinge shaft 9 through the insertion hole 25a provided in the axial direction of the central portion between the taper member 18 and the side plate 8b.
