Joints and connections – With adjunctive protector – broken parts retainer – repair,... – Holding means or protector functioning only during...
Patent
1984-06-01
1987-02-10
Kundrat, Andrew V.
Joints and connections
With adjunctive protector, broken parts retainer, repair,...
Holding means or protector functioning only during...
403187, 403252, 403255, F16B 708, F16B 900
Patent
active
046419837
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The invention concerns a clamping device for the separable connection of two profile section parts in accordance with the preamble to claim 1.
BACKGROUND OF THE INVENTION
A clamping device of this type is known, for example, from the Swiss Pat. No. 632 064. It is used for the assembly of frameworks consisting of vertical supports and horizontal beams. A clamping device is located at each end of a horizontal beam, the head of the retaining pin being introduced into a longitudinal groove in one of the horizontal beams. By means of the eccentric screw, the retaining pin is drawn inwards against the force of the spring in order to fix the beam onto the support.
The assembly of the clamping device is inconvenient because the retaining pin must be pressed into the bore of the insertion core and held until the eccentric screw is inserted. During the assembly of the framework, faulty handling can occur if the eccentric screw is rotated in the wrong direction so that its point releases the conical recess in the retaining pin and the latter is expelled from the insertion core by the spring.
SUMMARY OF THE INVENTION
The objective of the invention is to produce a clamping device, of the type mentioned at the beginning, in which these disadvantages are avoided. Such a clamping device has, in accordance with the invention, the features defined in the characterisation of Patent claim 1.
The retaining pin with snap-in connection to the insertion core can still be displaced axially to a limited extent. While the eccentric screw is being screwed out, the retaining pin is prevented from springing out by the snap retention. The snap retention also permits simple and convenient assembly because it is only necessary to press the retaining pin into the insertion core until its rear end engages. The eccentric screw is then inserted afterwards.
BRIEF DESCRIPTION OF THE DRAWINGS
FIGS. 1 and 2 show embodiments of the invention described in more detail below using the drawing, which in each Figure shows sections through a connection point of a framework.
DESCRIPTION OF THE PREFERRED EMBODIMENT
The framework shown in the figure has a vertical support 1 and a transverse beam 2 releasably connected to it. A plastic insertion core 3 having a longitudinal bore 4, which does not pass right through, and a transverse bore 5 is inserted in the end of the transverse beam 2 and held by means of a threaded bush 6 seated in the transverse bore 5. A retaining pin 7, supported so that it can be longitudinally displaced in the longitudinal bore 4 of the insertion core 3 and having a T-shaped retaining head 8, is pressed against a spring 9 which is in turn accommodated in the longitudinal bore 4 and is supported on an inner circular rib 17 of the bore wall.
A conical recess 10, which is penetrated eccentrically by the conical end 11 of a screw 12 guided in the threaded bush 6, is provided in the pin 7. An edge part 13 of the threaded bush 6 plugs into a corresponding opening 14 of the transverse beam 2 and so holds the insertion core 3 in its correct position. The bush 6 also has a bore 15 through which the pin 7 is led.
The support 1 is provided with four undercut longitudinal grooves 16, into which the retaining head 8 can be inserted, the retaining head 8 then engaging behind the grooves 16.
The retaining pin 7 has a rear extension in the form of a rod 18 whose end carries a widened partial piece 19. This partial piece 19 is provided on both sides with peripheral oblique surfaces 20, 21, the oblique surfaces forming an angle of 45.degree. with the longitudinal axis of the retaining pin. The insertion core 3 is also lengthened rearwards in the form of a rear port 22 with flexible wall parts 23, whose ends have inward protruding followers 24, forming part of snap retention means.
When assembling the clamping device, the insertion core 3 is first pressed into the horizontal beam 2 and fixed by means of the threaded bush 6. The springs 9 and the retaining pin 7 are now pushed into the longitudinal bore 4 of the inse
REFERENCES:
patent: 3672710 (1972-06-01), Kroopp
Kundrat Andrew V.
Syma Intercontinental AG
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