EP1238757A3 - Pneumatic screwdriver with screwing depth limitation - Google Patents

Pneumatic screwdriver with screwing depth limitation Download PDF

Info

Publication number
EP1238757A3
EP1238757A3 EP02004959A EP02004959A EP1238757A3 EP 1238757 A3 EP1238757 A3 EP 1238757A3 EP 02004959 A EP02004959 A EP 02004959A EP 02004959 A EP02004959 A EP 02004959A EP 1238757 A3 EP1238757 A3 EP 1238757A3
Authority
EP
European Patent Office
Prior art keywords
air
chamber
valve
screwdriver
valve chamber
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP02004959A
Other languages
German (de)
French (fr)
Other versions
EP1238757B1 (en
EP1238757A2 (en
Inventor
Hiroshi Tanaka
Junichi Tamura
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Max Co Ltd
Original Assignee
Max Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Max Co Ltd filed Critical Max Co Ltd
Publication of EP1238757A2 publication Critical patent/EP1238757A2/en
Publication of EP1238757A3 publication Critical patent/EP1238757A3/en
Application granted granted Critical
Publication of EP1238757B1 publication Critical patent/EP1238757B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25C—HAND-HELD NAILING OR STAPLING TOOLS; MANUALLY OPERATED PORTABLE STAPLING TOOLS
    • B25C7/00—Accessories for nailing or stapling tools, e.g. supports
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B23/00—Details of, or accessories for, spanners, wrenches, screwdrivers
    • B25B23/0064—Means for adjusting screwing depth
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B21/00—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose
    • B25B21/02—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose with means for imparting impact to screwdriver blade or nut socket
    • B25B21/023—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose with means for imparting impact to screwdriver blade or nut socket for imparting an axial impact, e.g. for self-tapping screws

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)

Abstract

An automatic stop device for a screwdriver stops the rotation of the air motor of the screwdriver if the desired screwing depht is reached. A screw feed device (15) of the screwdriver comprises a pneumatic cylinder (3). In an air passage (41) formed in the pneumatic cylinder, a valve chamber (47) is formed in order to operate an air exhaust valve (35) to communicate the pilot air chamber (23a) with the open air. An air exhaust hole (46) for exhausting compressed air from the air passage (41) is formed in the valve chamber (47). A timer chamber (50) is formed in the upstream of the valve chamber (47) in the air passage (41). A pressure within the valve chamber (47) increases and the air exhaust valve (35) operates upon the pressure increase and the stop valve (22) is actuated to close by discharging the compressed air from the pilot air chamber (23a) of the stop valve (22), when the piston reaches a position near the lower dead point and the compressed air flows from the air passage (41) to the valve chamber (47) via the timer chamber (50) and the air exhaust hole (46) is closed in synchronism with the operation of the contact arm (18).
EP02004959A 2001-03-05 2002-03-05 Pneumatic screwdriver with screwing depth limitation Expired - Lifetime EP1238757B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2001060812A JP4457509B2 (en) 2001-03-05 2001-03-05 Automatic stop device for screw driving machine
JP2001060812 2001-03-05

Publications (3)

Publication Number Publication Date
EP1238757A2 EP1238757A2 (en) 2002-09-11
EP1238757A3 true EP1238757A3 (en) 2005-03-16
EP1238757B1 EP1238757B1 (en) 2008-07-23

Family

ID=18920188

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02004959A Expired - Lifetime EP1238757B1 (en) 2001-03-05 2002-03-05 Pneumatic screwdriver with screwing depth limitation

Country Status (4)

Country Link
EP (1) EP1238757B1 (en)
JP (1) JP4457509B2 (en)
KR (1) KR100558495B1 (en)
DE (1) DE60227734D1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005014901B4 (en) * 2005-04-01 2012-09-13 Lorenz Stöger Pneumatic bolting system and method for controlling a screwing operation
CN113090801B (en) * 2021-05-12 2022-06-03 盐城市精工阀门有限公司 Valve capable of being automatically closed
CN113090800B (en) * 2021-05-12 2022-05-31 浙江伟山机械有限公司 Mechanical valve with automatic flow-off function

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3732934A (en) * 1969-08-28 1973-05-15 Aro Corp Fluid-driven tool with built-in work control mechanism
EP0967052A2 (en) * 1998-06-24 1999-12-29 Max Co., Ltd. Automatic stop device for screw striking machine

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3373622B2 (en) * 1993-10-26 2003-02-04 松下電工株式会社 Impact wrench
JP3264157B2 (en) * 1995-12-01 2002-03-11 日立工機株式会社 Rotary impact tool

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3732934A (en) * 1969-08-28 1973-05-15 Aro Corp Fluid-driven tool with built-in work control mechanism
EP0967052A2 (en) * 1998-06-24 1999-12-29 Max Co., Ltd. Automatic stop device for screw striking machine

Also Published As

Publication number Publication date
DE60227734D1 (en) 2008-09-04
KR20020071468A (en) 2002-09-12
JP4457509B2 (en) 2010-04-28
EP1238757B1 (en) 2008-07-23
EP1238757A2 (en) 2002-09-11
JP2002264032A (en) 2002-09-18
KR100558495B1 (en) 2006-03-07

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