Classifications

• • 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
  • E04G25/08—Shores or struts; Chocks telescopic with parts held relatively to each other by friction or gripping
• • 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
  • B25B5/00—Clamps
  • B25B5/06—Arrangements for positively actuating jaws
  • B25B5/068—Arrangements for positively actuating jaws with at least one jaw sliding along a bar
• • E—FIXED CONSTRUCTIONS
  • E04—BUILDING
  • E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
  • E04H12/00—Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures
  • E04H12/18—Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures movable or with movable sections, e.g. rotatable or telescopic
  • E04H12/182—Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures movable or with movable sections, e.g. rotatable or telescopic telescopic

Definitions

• Telescopic device in particular spreading or supporting device or clamping device
• the invention relates to a telescopic device, in particular a spreading or supporting device or a clamping device according to the preamble of patent claim 1.
• a device of this type is known from US 3,373,473. A similar device is also known from US 5 101 215.
• This known device has the disadvantage that the telescopic movement of two rods can only be achieved via a relatively lengthy cranking process.
• the object of the invention is to design a device of the type mentioned at the outset, in particular with a view to lightweight designs, in such a way that the achievement of the telescopic movement is simplified.
• This object is achieved according to the invention by a telescopic device with the features of patent claim 1.
• Belt pretensioner is to be understood here as a device by means of which a belt can be ground and which does not oppose a hand-pulling of the belt in a position of the belt pretensioner, but which is able, for example, with a reciprocating movement use a lever to lash the belt over short distances and then fix the belt in this lashed position.
• FIG. 3 shows a section corresponding to FIG. 1 with a clamping device for the rods actuated by the belt tensioner in the clamped state
• FIG. 4 shows the embodiment of FIG. 3 with the clamping device open
• FIG. 5 shows a section corresponding to FIG. 3 with a clamping device in a further embodiment, 6 the clamping jaws and the rod against which they act, in section,
• FIG. 1 shows a telescopic device with an outer rod 5 in the form of a tube and an inner rod 6 which is inserted in it and also in the form of a tube.
• a belt 2 fastened to the outer rod, the belt running into the interior of the outer rod 5, around a deflection device 1, which has a deflection roller 26 attached to the inner or lower end of the inner rod 6, up again in the direction free End of the outer rod 5 and from there through a belt tensioner 36.
• the belt tensioner 36 can be of conventional design, for example a ratchet tensioner. This has a drum with a slot containing the drum axis 13, into which the belt can be inserted. In a position of the belt pretensioner lever 7, the belt can be pulled through the slot over considerable lengths by hand, whereby in the embodiment shown the inner rod 6 is lifted out of the outer rod 5 in a corresponding length. In the example shown, a pulley effect of 1: 2 occurs, which also acts in the sense of reducing the force required for manual pulling on the belt. As soon as the end position is reached or almost reached, for example under a formwork to be supported, the lever 7 is activated with a ratchet movement, as a result of which the belt, as can be seen in FIG. 1, is clamped on itself and closed over a short distance the generation of the required contact pressure can be tightened or lashed. After reaching the end position, the belt 7 is folded in this position by folding the lever 7 locked.
• a box 29 takes up excess belt length.
• the belt can be rolled up with a spring mechanism.
• a force indicator 21 known per se which spring-loads the fixed belt, simultaneously acts as an elastic buffer for accommodating any additional belt length, which can occur as a result of the belt being stretched under the action of the load.
• the deflection roller 26, as can be seen in comparison with FIG. 2, can be moved from the inner rod to the outer rod by means of a removable axle journal 30. If at the same time the attached end 20 of the belt 2 is attached to the inner rod 6 instead of to the outer rod 5, the subject device is suitable for clamping objects, because the two telescoping parts then act under the effect of a belt tightening 5 and 6 can be moved against each other.
• the shaft 27 is fixed in a slot of the inner rod 6 by means of a spring cam 31 and can be pulled out against the resistance of this spring cam with the deflection roller.
• the same clamping effect between the foot of the outer rod 5 and the foot of the inner rod 6 can be achieved if the inner rod is pushed downward through the outer rod (when viewed according to FIG. 2) and thus against the outer rod lies as in the combined FIGS. 2 and 2a.
• the belt is of course (as in Fig. 1) to hang on the outer rod.
• the outer rod also has a base part 4 made of rigid plates, which can rest on a floor via elastic support bodies 3.
• Fig. 3 shows an embodiment in which the belt tensioner 36 cooperates with a clamping device 8 with wedges 14 and 15, which in the closed position of the belt strammers (lever 7 towards the vertical position) are free from the belt tensioner and wedged between the inner and outer rods 6 and 5 under spring load and thus bring about a fixing of the position of the two rods to one another which is independent of the holding forces of the belt.
• the belt could then in principle be severed without this affecting the relative position of the two rods 5 and 6.
• the belt length compensating force measuring device 21 acts here between the deflection part 1 and the inner rod 6.
• FIG. 4 shows the clamping device 8 of FIG. 3 in the release position.
• FIG. 7 shows the device for the most common case of use, namely the spreading operation
• Fig. 8 shows an embodiment for clamping operation and a modification thereto (fastening and deflection of the belt as in FIG. 2 or FIG. 2a)
• FIG. 9 a two-strand arrangement for the clamping operation corresponding to FIG. 8.
• pulling hooks 41 can be provided on the foot plates, likewise on a head part or the inner rod of the embodiment of FIG. 2a.
• rod is to be understood in its most general form for this description.
• the parts 5 and 6 only have to be able to be pushed into one another, but do not have to have a round or circular cross section and can, in principle, also be complex in themselves. Rectangular tubes are preferred.

Landscapes

• Engineering & Computer Science (AREA)
• Architecture (AREA)
• Mechanical Engineering (AREA)
• Civil Engineering (AREA)
• Structural Engineering (AREA)
• Clamps And Clips (AREA)
• Buckles (AREA)
• Arc Welding In General (AREA)
• Load-Engaging Elements For Cranes (AREA)
• Road Paving Machines (AREA)

Applications Claiming Priority (3)

Publications (2)

Family

ID=7763212

Family Applications (1)

Country Status (5)

Families Citing this family (2)

Family Cites Families (8)

• 1995
  • 1995-05-30 DE DE19519797A patent/DE19519797A1/de not_active Ceased
• 1996
  • 1996-05-24 WO PCT/EP1996/002251 patent/WO1996038641A1/fr active IP Right Grant
  • 1996-05-24 DE DE59607685T patent/DE59607685D1/de not_active Expired - Fee Related
  • 1996-05-24 AU AU61229/96A patent/AU6122996A/en not_active Abandoned
  • 1996-05-24 EP EP96918631A patent/EP0828909B1/fr not_active Expired - Lifetime
  • 1996-05-24 AT AT96918631T patent/ATE205569T1/de not_active IP Right Cessation

Non-Patent Citations (1)

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