GB1470511A - Self-locking device for telescopic props - Google Patents

Self-locking device for telescopic props

Info

Publication number
GB1470511A
GB1470511A GB24373A GB24373A GB1470511A GB 1470511 A GB1470511 A GB 1470511A GB 24373 A GB24373 A GB 24373A GB 24373 A GB24373 A GB 24373A GB 1470511 A GB1470511 A GB 1470511A
Authority
GB
United Kingdom
Prior art keywords
inner section
section
cage
prop
props
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.)
Expired
Application number
GB24373A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB24373A priority Critical patent/GB1470511A/en
Publication of GB1470511A publication Critical patent/GB1470511A/en
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
    • E21D15/14—Telescopic props
    • E21D15/28—Telescopic props with parts held relatively to each other by friction or gripping
    • E21D15/34—Telescopic props with parts held relatively to each other by friction or gripping by axially- moving balls, rollers, or the like
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G25/00—Shores or struts; Chocks
    • E04G25/04—Shores or struts; Chocks telescopic
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G25/00—Shores or struts; Chocks
    • E04G25/04—Shores or struts; Chocks telescopic
    • E04G25/06—Shores or struts; Chocks telescopic with parts held together by positive means
    • E04G25/065—Shores or struts; Chocks telescopic with parts held together by positive means by a threaded nut
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
    • E21D15/14—Telescopic props
    • E21D15/16—Telescopic props with parts held together by positive means, with or without relative sliding movement when the prop is subject to excessive pressure
    • E21D15/24—Telescopic props with parts held together by positive means, with or without relative sliding movement when the prop is subject to excessive pressure with axial screw-and-nut, rack-and-worm, or like mechanism
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B7/00—Connections of rods or tubes, e.g. of non-circular section, mutually, including resilient connections
    • F16B7/10—Telescoping systems
    • F16B7/14—Telescoping systems locking in intermediate non-discrete positions
    • F16B7/1454—Telescoping systems locking in intermediate non-discrete positions with a clamp locking the telescoping members by swinging a handle provided with a locking cam

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Architecture (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Civil Engineering (AREA)
  • Mutual Connection Of Rods And Tubes (AREA)

Abstract

1470511 Clamps; props A T JOHN and J H MOXHAM 2 April 1974 [2 Jan 1973 26 Feb 1973] 243/73 and 9266/73 Headings E1E and E2B A self-locking device for attachment to the top of the lower outer section of a telescopic prop to retain the upper inner section in any extended position includes an annular housing 5 with a tapered counter bore 7 accommodating a cage 19 supporting locking balls 9 which allow free upward movement of the inner section 3 (suitably a length of scaffolding tube) but which become jammed between the surface of the counterbore and the inner section 3 to prevent downward movement of the latter. The cage is connected to a pivoted lever 21 which can be depressed to lift the cage and permit lowering of the inner section 3. The housing is supported for rotation about its axis by a sleeve 11 which threadingly engages an adapter 15 secured in the top of the outer section and permits fine adjustment of the prop and release thereof from engagement with a load. The outer section of the prop is preferably of square cross-section and has sockets for receiving the ends of struts used to interconnect adjacent props. The inner section 3 may also carry an axially adjustable head member including a screw extending into the inner section and engaging the top of the latter via a nut. In an alternative embodiment, the cage is integral with cover 8 which is slidable upwards to release the balls.
GB24373A 1974-04-02 1974-04-02 Self-locking device for telescopic props Expired GB1470511A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB24373A GB1470511A (en) 1974-04-02 1974-04-02 Self-locking device for telescopic props

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB24373A GB1470511A (en) 1974-04-02 1974-04-02 Self-locking device for telescopic props

Publications (1)

Publication Number Publication Date
GB1470511A true GB1470511A (en) 1977-04-14

Family

ID=9700958

Family Applications (1)

Application Number Title Priority Date Filing Date
GB24373A Expired GB1470511A (en) 1974-04-02 1974-04-02 Self-locking device for telescopic props

Country Status (1)

Country Link
GB (1) GB1470511A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2487938A1 (en) * 1980-07-31 1982-02-05 Powondra Dipl Ing Franz FORCE TRANSMISSION ELEMENT
CN102619540A (en) * 2012-04-26 2012-08-01 山西东华机械有限公司 Hydraulic support placing machine turntable device
CN106285737A (en) * 2016-11-03 2017-01-04 江苏中矿立兴能源科技有限公司 A kind of mechanical compressible individual prop of adjustable constant-resistance
CN109944615A (en) * 2019-04-18 2019-06-28 东北大学 A kind of underground supporting manually ore pillar and erection method
CN114135139A (en) * 2021-12-02 2022-03-04 黄栋 Existing building in-situ protection device for underground space development of historical block

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2487938A1 (en) * 1980-07-31 1982-02-05 Powondra Dipl Ing Franz FORCE TRANSMISSION ELEMENT
CN102619540A (en) * 2012-04-26 2012-08-01 山西东华机械有限公司 Hydraulic support placing machine turntable device
CN102619540B (en) * 2012-04-26 2014-06-18 山西东华机械有限公司 Hydraulic support placing machine turntable device
CN106285737A (en) * 2016-11-03 2017-01-04 江苏中矿立兴能源科技有限公司 A kind of mechanical compressible individual prop of adjustable constant-resistance
CN109944615A (en) * 2019-04-18 2019-06-28 东北大学 A kind of underground supporting manually ore pillar and erection method
CN114135139A (en) * 2021-12-02 2022-03-04 黄栋 Existing building in-situ protection device for underground space development of historical block

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee