US3722846A - Connecting means - Google Patents

Connecting means Download PDF

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Publication number
US3722846A
US3722846A US00112308A US3722846DA US3722846A US 3722846 A US3722846 A US 3722846A US 00112308 A US00112308 A US 00112308A US 3722846D A US3722846D A US 3722846DA US 3722846 A US3722846 A US 3722846A
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US
United States
Prior art keywords
cap
ball
support
support member
support cap
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 - Lifetime
Application number
US00112308A
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English (en)
Inventor
W Albrecht
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.)
Kloeckner Werke AG
Original Assignee
Kloeckner Werke AG
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 Kloeckner Werke AG filed Critical Kloeckner Werke AG
Application granted granted Critical
Publication of US3722846A publication Critical patent/US3722846A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • E21D15/50—Component parts or details of props
    • E21D15/54—Details of the ends of props
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D17/00—Caps for supporting mine roofs
    • E21D17/10—Details of mine caps for engaging the tops of pit-props, with or without retaining-plates; Retaining-plates

Definitions

  • ABSTRACT Means for establishing a connection between a support cap and a prop head for pit props of the type used in the mining industry comprising a bar or the like supporting an upper bed such as a hanging wall or roof of the mine, and the pit prop constituting a hydraulic cylinder with its ram, or prop head, bracing against the support cap, the connecting means comprising a securing element fixed to the outer free end of the ram and releasably fixed to the support cap.
  • the invention relates to a means for establishing a connection between a support cap and a ram of a pit prop as used in the mining industry, these instrumentalities being used to support such as a coal face or a mine wall or root, with the prop comprising, essentially a hydraulic cylinder used with a base or runner which rests on the floor, or lower bed or foot wall of the mine, and a support cap or horizontal bar, which supports an upper bed or hanging wall or roof of the mine, the hydraulic cylinder being disposed between the runner and support cap to receive the load, the whole being known in the mining industry as a hydraulically driven chock system.
  • connection between the ball head of the ram and the support cap is effected by segments engaging below the ball head and fixed'to the cap as by screws.
  • the swivelling of the cap relative to the ball head causes the segments to strike towards the ball head. Because of the strong lever action the screws which connect the segments with the cap are sheared off, frequently causing accidents.
  • Another construction known in the art uses a bolt or a tension pin as connecting means between the cap and the ball head of the ram or prop, which is driven transversely through the ball head in the longitudinal direction of the cap. Swivelling of the cap is possible not only around the axis of the bolt (i.e., transversely in the longitudinal direction of the cap), but also around the longitudinal axis of the cap due to the usual trumpet-shaped bore for the bolt in the ball head of the prop. Because of this additional swivelling movement around the longitudinal axis of the cap the bolt strikes the wall of the'trumpet-shaped bore in the ball head with the strong forces produced effecting a deformation of the bolt. In addition, this construction does not allow removal or replacement of the deformed bolt.
  • An object of the invention is to provide a construction which permits easy replacement of the securing element, even if this element is damaged or deformed.
  • the securing element engages in at least one support member which is detachably fixed at the support cap.
  • the support member projects into a hollow section of the support cap, with the arms of the support member being fixed to a lower section of the hollow section of the support cap.
  • the usual bolt or wire rope may be provided as the securing element, with the securing element being engaged in'a groove or bore of the support member.
  • the securing element is provided on both sides of the prop with end caps, which are supported by a projection of the support member.
  • the support member is constructed as a circular part, extending around the axis of the ram or prop, with the groove or bore which serves to install the securing element extending in a longitudinal direction relative to the support cap hollow section.
  • angular shoulders are provided on both sides, the free arms of which are parallel to the lower section of the support cap and are detachably fixed thereto.
  • the free arms of the support member each pass between a pair of spaced, parallel ears which-depend from the lower section of the support cap, the ears having aligned openings to accept locking pins which are disposed below and, preferably, make frictional contact with the free arms.
  • An advantage of the present invention is that, if the securing element is deformed, it can easily be removed by removing the locking pins, whereupon the ram or prop with the support member and the securing element may be driven down, so that it is possible to remove and replace the securing element in a convenient position.
  • the support member may be constructed of two separate parts which, however, requires a corresponding reinforcement of the fastening means between the free arms and lower section of the support cap.
  • FIG. 1 is a longitudinal cross sectional view taken through a support cap incorporating connecting means embodying a preferred form of the invention
  • FIG. 2 is a cross sectional view taken on line 11-11 of FIG. 1, with the ball cap and support cap omitted;
  • FIGS. 3 and 4 are views similar to FIGS. 1 and 2 of another form of the invention.
  • FIG. 5 is a view similar to FIGS. 1 and 3 of still another form of the invention.
  • a horizontally disposed support cap is in the form of a bar or the like having a hollow section with spaced parallel upper and lower walls I and 9 respectively.
  • a ball cap element 2 which extends between the upper and lower walls is fixed to the lower surface of upper wall 1 and is provided with a ball cup or recess 3 centrally of its downwardly facing upper wall in which a ball head 4 of the ram of a hydraulic cylinder or prop 5 is receivable, the ram passing through a provided opening in lower wall 9 of the support cap.
  • the ball head 4 and support cap are connected by an annular support member 6 which is disposed immediately below ball cap element 2 and sleeves the ball head, the support member being provided, with a groove 7, (FIGS. 1 and 2), or a bore 7a (FIGS. 3 and 4), which extends along the longitudinal axis of the support cap.
  • the groove 7 and bore 7a are adapted to receive a securing element 8 in the form of a pin or bolt which passes through oppositely facing bell-shaped openings provided in the upper end of the ball head.
  • Support member 6 is provided with a pair of depending arms 13, one at each end of the support member so as to be disposed along the longitudinal axis of support cap, the arms passing downwardly and outwardly through the provided opening in lower wall 9 of the support cap.
  • arms 13 are bent upwardly so as to be disposed immediately below and in parallel relation to lower wall 9 of the support cap.
  • Pairs of depending ears 10 are provided on lower wall 9 and are so disposed that the lower free ends of arms 13 pass therebetween.
  • a bolt or locking pin 12 which passes through aligned openings 11 in cars 10 below the lower free ends of arms 13 serves to clamp the support member 6 to the support cap.
  • Each bolt or locking pin 12 is preferably in frictional contact with the lower free ends of arms 13.
  • securing element 8 is constituted by a wire rope having end caps 14 supported by projections 15 and 16 at each end of support member 6.
  • the support cap can be removed from its engagement with the prop or cylinder 5 by removal of bolts or locking pins 12, whereupon the ram or ball head of the cylinder may be driven down and securing element 8 easily removed and replaced as necessary.
  • Means for establishing a secured connection for an apertured ball head of a mining pit prop comprising:
  • a hollow support cap defined by spaced walls
  • a ball cap element positioned between the walls of the support cap and having a ball cup for receiving a ball head of the pit prop
  • a securing pin being receivable in the groove of the LII support member and extendable through the aperture of the ball head of the pit prop
  • the support member having a pair of depending arms each extending through and outwardly of the support cap and being pinned to one of the walls of the support cap.
  • Means for establishing a secured connection for an apertured ball head of a mining pit prop comprising:
  • a hollow support cap defined by spaced walls
  • a ball cap element positioned between the walls of a support cap and having a ball cup for receiving the ball head of the pit prop
  • Means or estaqflishing a secured connection for an apertured ball head of a mining pit prop comprising:
  • a hollow support cap defined by spaced walls
  • a ball cap element positioned between the walls of the support cap and having a ball cup for receiving the ball head of the prop
  • a securing pin being receivable in the groove of the support member and extendable through the aperture of the ball head of the pit prop
  • the support member having a pair of depending arms extending outwardly of the support cap
  • means for releasably fixing the arms to a wall of the support cap comprising pairs of cars depending from the support cap wall with each arm passing between one pair of ears and a pin passing between the ears of each pair in frictional contact, with the arms.

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Earth Drilling (AREA)
  • Emergency Lowering Means (AREA)
US00112308A 1970-02-11 1971-02-03 Connecting means Expired - Lifetime US3722846A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19702006088 DE2006088B2 (de) 1970-02-11 1970-02-11 Kappenhalterung fuer grubenstempel

Publications (1)

Publication Number Publication Date
US3722846A true US3722846A (en) 1973-03-27

Family

ID=5761928

Family Applications (1)

Application Number Title Priority Date Filing Date
US00112308A Expired - Lifetime US3722846A (en) 1970-02-11 1971-02-03 Connecting means

Country Status (5)

Country Link
US (1) US3722846A (enrdf_load_stackoverflow)
BE (1) BE761912A (enrdf_load_stackoverflow)
DE (1) DE2006088B2 (enrdf_load_stackoverflow)
FR (1) FR2078268A5 (enrdf_load_stackoverflow)
ZA (1) ZA71740B (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3782673A (en) * 1971-03-05 1974-01-01 Kloeckner Werke Ag Connecting means between a support cap and a prop head
US4004771A (en) * 1972-09-09 1977-01-25 Gewerkschaft Eisenhutte Westfalia Ball-and-socket type connections for use with mining apparatus

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2505925A1 (fr) * 1981-05-12 1982-11-19 Alsace Mines Potasse Dispositif mecanique de liaison entre tete ou pied d'etancon et embase ou chapeau des piles de soutenement

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3782673A (en) * 1971-03-05 1974-01-01 Kloeckner Werke Ag Connecting means between a support cap and a prop head
US4004771A (en) * 1972-09-09 1977-01-25 Gewerkschaft Eisenhutte Westfalia Ball-and-socket type connections for use with mining apparatus

Also Published As

Publication number Publication date
DE2006088A1 (de) 1971-08-19
BE761912A (fr) 1971-07-01
FR2078268A5 (enrdf_load_stackoverflow) 1971-11-05
DE2006088B2 (de) 1973-07-12
ZA71740B (en) 1971-10-27

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