JPH01146010U

JPH01146010U -

Info

Publication number: JPH01146010U
Application number: JP4345988U
Authority: JP
Priority date: 1988-03-31
Filing date: 1988-03-31
Publication date: 1989-10-06

Description

【図面の簡単な説明】[Brief explanation of the drawing]

第１図〜第９図はこの考案の実施例に関し、第
１図及び第２図はそれぞれタツプスクリユーによ
る締め回し前及び螺着穴へのタツプスクリユーの
螺合中の状態において示す締付けねじの脱落防止
構造の断面図、第３図及び第４図はタツプスクリ
ユーを頭部側及び側方から示す図、第５図はタツ
プスクリユーを螺着穴に螺合させた後、螺着穴か
ら取り外した状態を示す断面図、第６図は一方の
被締付け部材からタツプスクリユーを取り外した
ときのタツプスクリユーの状態を示す断面図、第
７図はタツプスクリユーを外したときのタツプス
クリユーの傾斜を阻止する構造を示す断面図、第
８図はタツプスクリユーを外したときのタツプス
クリユーの傾斜を阻止する別の構造を示す断面図
、第９図ａないしｃは第８図の突出部の種々の例
を示す斜視図、第１０図及び第１１図は従来の締
付けねじの使用状況をそれぞれ締付けねじの締め
付け時及び取外し時において示す断面図である。１０，１２……被締付け部材、１６……螺着穴
、３０……タツプスクリユー（締付けねじ）、３
８……ねじ部、４０……円柱部、４２……対峙部
、４４……通過孔、４８……傾斜阻止孔、５０，
５０ａ，５０ｂ，５０ｃ……突出部。 Figures 1 to 9 relate to an embodiment of this invention, and Figures 1 and 2 show a tightening screw fall-off prevention structure shown before tightening with the tap screw and while the tap screw is being screwed into the screw hole, respectively. Figures 3 and 4 are cross-sectional views showing the tap screw from the head side and side, and Figure 5 is a cross-sectional view showing the tap screw screwed into the screw hole and then removed from the screw hole. Figure 6 is a cross-sectional view showing the state of the tap screw when the tap screw is removed from one of the members to be tightened, Figure 7 is a cross-sectional view showing the structure that prevents the tap screw from tilting when the tap screw is removed, and Figure 8 The figure is a sectional view showing another structure for preventing the tap screw from tilting when the tap screw is removed, FIGS. 9a to 9c are perspective views showing various examples of the protrusion shown in FIG. 8, and FIGS. The figure is a cross-sectional view showing how a conventional tightening screw is used when the tightening screw is tightened and when it is removed. 10, 12... Member to be tightened, 16... Screw hole, 30... Tap screw (tightening screw), 3
8... Threaded part, 40... Cylindrical part, 42... Opposing part, 44... Passing hole, 48... Inclination prevention hole, 50,
50a, 50b, 50c...Protrusion parts.

Claims

【実用新案登録請求の範囲】 (1) 締付けねじの軸部が先端側のねじ部とこれ
に続く円柱部とをもち、互いに締め付けられる２
個の被締付け部材が設けられ、一方の被締付け部
材には、前記ねじ部が螺着する螺着穴が形成され
、他方の被締付け部材は、前記螺着穴から離れた
位置において前記螺着穴に対峙する対峙部を有し
、この対峙部には、前記ねじ部が回転により通過
可能な通過孔が形成され、前記円柱部の径は前記
通過孔の径より小さいことを特徴とする締付けね
じの脱落防止構造。 (2) 前記締付けねじはタツプスクリユーである
ことを特徴とする請求項１記載の締付けねじの脱
落防止構造。 (3) 他方の被締付け部材は、前記ねじ部の径よ
り大きくて前記締付けねじの傾斜時に前記ねじ部
の先端部が周面に当接可能な傾斜阻止孔を、一方
の被締付け部材の前記螺着穴の開口面近傍におい
て、有していることを特徴とする請求項１又は２
記載の締付けねじの脱落防止構造。 (4) 他方の被締付け部材は、前記対峙部から前
記螺着穴の方へ突出し前記締付けねじの傾斜時に
前記ねじ部の先端が当接する突出部を有している
ことを特徴とする請求項１又は２記載の締付けね
じの脱落防止構造。[Claims for Utility Model Registration] (1) The shaft portion of the tightening screw has a threaded portion on the tip side and a cylindrical portion following this, which are tightened together.
A screw hole into which the threaded portion is screwed is formed in one of the fastened members, and a screw hole into which the screw portion is screwed is formed in one of the fastened members, and the other screw portion is formed in a position away from the screw hole. The tightening device has an opposing portion facing the hole, a passing hole through which the threaded portion can pass by rotation is formed in the opposing portion, and a diameter of the cylindrical portion is smaller than a diameter of the passing hole. Structure to prevent screws from falling off. (2) The tightening screw falling-off prevention structure according to claim 1, wherein the tightening screw is a tap screw. (3) The other member to be tightened has an inclination prevention hole that is larger in diameter than the threaded portion and allows the tip of the threaded portion to come into contact with the circumferential surface when the tightening screw is inclined. Claim 1 or 2, characterized in that it is provided near the opening surface of the screw hole.
Structure to prevent the mentioned tightening screws from falling off. (4) The other member to be tightened has a protruding part that protrudes from the opposing part toward the screw hole and comes into contact with the tip of the threaded part when the tightening screw is tilted. A structure to prevent the tightening screws described in 1 or 2 from falling off.