JPS63726U

JPS63726U -

Info

Publication number: JPS63726U
Application number: JP9495386U
Authority: JP
Priority date: 1986-06-20
Filing date: 1986-06-20
Publication date: 1988-01-06

Description

[Brief explanation of the drawing]

第１図および第２図は本考案に係る一実施例の
全体構成を示し、第１図は断面図、第２図は側面
図であり、第３図は本考案の変形例を示す要部断
面図である。また、第４図は従来のネジ締めユニ
ツトの全体構成を示す断面図である。１……ハウジング部材、２……スリーブ孔、６
……ピストン部材、８……ビツト部材、１４……
ビツト、１８……ガイド部材、２４……前方ピス
トン部、２５……後方ピストン部、２６……連結
部材、２８……スプリング、２９……係止ピン、
３０……係合孔。 1 and 2 show the overall configuration of an embodiment of the present invention, FIG. 1 is a sectional view, FIG. 2 is a side view, and FIG. 3 is a main part showing a modification of the present invention. FIG. Further, FIG. 4 is a sectional view showing the overall structure of a conventional screw fastening unit. 1...Housing member, 2...Sleeve hole, 6
... Piston member, 8 ... Bit member, 14 ...
Bit, 18... Guide member, 24... Front piston part, 25... Rear piston part, 26... Connection member, 28... Spring, 29... Locking pin,
30...Engagement hole.

Claims

[Scope of utility model registration request]

A housing member having a sleeve hole extending in the axial direction, a piston member disposed within the housing member and slidably inserted into the sleeve hole in the front-rear direction, and a bit attached to the piston member and having a bit at the tip. and a guide member disposed in front of the housing member to guide the bit to a predetermined fastening portion, the piston member comprising:
It consists of a front piston part, a rear piston part, and a connecting member that connects both piston parts with a spring, and an engagement hole in the front piston part that engages with a locking pin fixed to the tip of the housing member. is provided, and when the screw is fastened, after the piston member is pushed out by air pressure to the engagement position between the engagement hole and the locking pin at the tip of the housing member, only the bit member is pushed out by the biasing force of the spring. 1. A screw tightening unit characterized in that screw tightening is performed by pushing out a screw held by the guide member by pushing it out under the guidance of a guide member.