JPH044181U

JPH044181U -

Info

Publication number: JPH044181U
Application number: JP4558890U
Authority: JP
Priority date: 1990-04-27
Filing date: 1990-04-27
Publication date: 1992-01-14

Description

[Brief explanation of the drawing]

第１図乃至第７図は本考案の実施例を示し、第
１図はブツシユの斜視図、第２図は軸受部の斜視
図、第３図乃至第５図は第１図のブツシユの正面
図、部分断面側面図、および平面図、第６図はブ
ツシユを嵌合した状態のシリンダ先端部の断面図
、第７図は第６図のＡ−Ａ線断面図、第８図は従
来の閉鎖装置の断面側面図、そして、第９図は閉
鎖装置を適用した引違い戸の部分正面図である。１……シリンダ、３……ピストン軸、７……鉄
片、８……磁石片、９……軸受部、１２……ブツ
シユ、１３……ブツシユの軸受孔、１７……突起
、１８……凹部。 Figures 1 to 7 show an embodiment of the present invention, Figure 1 is a perspective view of the bushing, Figure 2 is a perspective view of the bearing section, and Figures 3 to 5 are front views of the bushing in Figure 1. Figure 6 is a cross-sectional view of the tip of the cylinder with the bush fitted, Figure 7 is a cross-sectional view taken along the line A-A in Figure 6, and Figure 8 is a conventional FIG. 9 is a cross-sectional side view of the closing device, and a partial front view of a sliding door to which the closing device is applied. DESCRIPTION OF SYMBOLS 1... Cylinder, 3... Piston shaft, 7... Iron piece, 8... Magnet piece, 9... Bearing part, 12... Bush, 13... Bush bearing hole, 17... Projection, 18... Recessed part .

Claims

[Scope of Claim for Utility Model Registration] (1) A sliding door is provided with the ability to always move in the closing direction, an air cylinder is attached to the upper stile or door frame, or a lintel, etc., and the air cylinder is A sliding door closing device in which a piece of iron or a magnet is attached to the tip of a piston shaft of a cylinder, and a piece of magnet or iron is arranged at a location facing the tip of the piston shaft, which is attached to the tip of the cylinder. The bearing hole of the bushing that fits into the bearing part is larger than the outer diameter of the piston shaft and is eccentrically provided above, and when the lower peripheral surface of the piston shaft is in contact with the lower peripheral surface of the bearing hole, A structure of a bearing portion of a piston shaft in a sliding door closing device, characterized in that the axis of the piston shaft is located approximately at the center of the cylinder. (2) Projections are provided at opposing positions on the outer periphery of the rear end of the bushing, and the projections fit into recesses formed at opposing positions on the bottom of the rear end of the bearing so that the fitting position can be changed. Claim 1 characterized in that:
The structure of the bearing portion of the piston shaft in the sliding door closing device described above.