DE1251242B - Long adjustable three-part civil engineering strut by screw adjustment - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY

GERMAN

PATENT OFFICE

EDITORIAL

Int. Cl .:

E02d

German class: 84 c-17/08

Number: 1 251 242

File number: J 25796 V / 84 c

Filing date: May 9, 1964

Opening day: September 28, 1967

The invention relates to a three-part civil engineering strut with adjustable length by screw adjustment asymmetrical head plates arranged on the front ends of the mutually displaceable parts with adjustment angles.

The known civil engineering struts of this type are designed like a turnbuckle; a middle one, to be attached An actuating handle designed spindle protrudes at both ends into the end of the strut parts equipped with the head plates. The adjustment angles are formed by rigid bends in the head plates. The handling of appropriate struts is difficult. The rigid adjustment angles do not allow that regardless of the existing belt rails the trench lining can always be reached with certainty, aligning the strut axis with the belt rails.

In the case of other struts, which are primarily only to be used in building construction, it is already known to provide a cross tube at the upper end of the length-adjustable strut and to guide side supports on this in a pivotable and displaceable manner. The relevant struts are not suitable as civil engineering struts to support the belt rails of trench linings , let alone that they would allow easy handling for this purpose.

The object of the present invention is to design a generic civil engineering strut so that it can also be installed by a single person, and it allows the strut axis to align with the belt rails of the trench lining.

This is achieved according to the invention in that the civil strut at one end in itself known teleskopartigerweise is roughly adjustable and the adjustment angle can be displaced in parallel backward tightening retaining screws are attached to the head plates.

An advantageous embodiment here according to the invention is that the adjustment angle in Longitudinal slots are displaceable in parallel.

A further advantageous design is given according to the invention in that each adjustment angle is fluted concentrically on the middle section from its end face.

With this configuration, a civil engineering strut is created with a favorable design, which because of the easy handling can be installed by a single person, and it does so in addition enables the strut axis to be aligned with the belt rails of the trench lining.

Adjustable in length by screw adjustment
three-part civil engineering strut

Applicant:

Friedrich Ischebeck,

Ennepetal-Altenvoerde, Loher Str. 51-69

For installation, the civil engineering strut, preferably with the head plate facing the thread adjustment, is first placed on one belt rail. The adjustment angle prevents it from falling.

This civil engineering strut resting on one end is then roughly adjustable telescopically at the other The end is pulled out until the adjustment bracket on the associated head plate matches the opposite Belt rail overlaps. This extended position is indicated by the coarse adjustment in on secured in a known manner provided plug-in pin. The plug-in pin is used by the Adjustment angles outgoing non-rotatable support

_ Transfer the center tube. The thread fine adjustment can then be used to further increase the length to be used. If this has reached a certain clamping position, it can be determined whether the Strut axis is aligned centrally on the belt rails. If this is not the case, the Retaining screws that are accessible from the rear are easily loosened and taking advantage of the parallel displaceability the adjustment angle an alignment of the strut can be made. After that the retaining screws dressed again. The full intended clamping force can then be achieved by further thread adjustment the strut to be exercised. The asymmetrically arranged head plates bring a large Possibility to adjust the adjustment angle without this possibly impairing the stability Way too far over the top plates. The adjustability of the adjustment angle the intended longitudinal slots is constructive and in view of the robust requirements of Advantage. The groove of the adjustment angle on the middle section, in turn, provides a great adjustment option cheap against.

The subject matter of the invention is illustrated in the drawing using an exemplary embodiment. It shows

A b b. 1 shows a side view of a civil engineering strut designed according to the invention in the working position,

Claims (3)

A b b. 2 shows a view towards an end section of the civil engineering strut, A b b. 3 a view like A b b. 2, but when using a wider belt rail, and Fig. 4 shows a section along the line AB in Fig. 1. The civil strut has the central tube 1 and the two telescopically displaceable support tubes 2 and 3. A pair of socket pins 4 allows the coarse adjustment of the civil strut in its Longitudinal direction; In order to achieve an additional fine adjustment, the support tube 3 has an external thread 3 ′ over a sufficient section, into which an adjusting nut 5, which is arranged on the central tube 1 and cannot be lost, engages. The adjusting nut 5 is provided with corresponding handles 6 for its actuation. The support tubes 2 and 3 protruding from the central tube 1 are equipped with head plates 7 at their outwardly directed front ends. Each head plate 7 is cut to a rectangular shape. They are preferably fastened by welding, specifically in such a way that the head plate 7 projects to different extents on two opposite sides over the strut axis x-x. Measured from the strut axis, this results in a shorter head plate flap of length α and a longer head plate flap of length b. Each head plate 7 has the same through holes 8 at its four corners. These serve for the detachable fastening of an adjustment bracket 9. The adjustment bracket 9 can be braced against the head plate 7 from the rear by means of two retaining screws 10. Countersunk head screws are preferably used as retaining screws 10, which have a square part so that they cannot be rotated. The through holes 8 are also formed correspondingly square. The adjustment bracket 9 has on its one bracket leg 9 'parallel longitudinal slots 11. These allow, after loosening the retaining screw nuts 10 ', to move the adjustment bracket 9 in the direction of the double arrow y (A b b. 2 and 3). The other leg 9 ″ of the adjustment bracket 9 is used to support the civil strut on the belt edge. The displaceability of the adjustment bracket 9 creates the possibility of a precise alignment of the support strut axis xx on the axis xx of the belt 12. In the present case, a double T-rail serves as Belt 12. As the application example shows, the belt axis xx runs through the web 12 'of this rail. The double T-rail can now be of different sizes according to the requirements resulting from practice, so that the limited mobility of the adjustment angle 9 to Achieving an equiaxed position is not sufficient. For example, a double T-rail with a relatively small leg 12 ″, as shown in A b b. 2 is shown, the adjustment bracket 9 is screwed to the shorter head plate flap. When using a wider rail with naturally larger legs, the adjustment bracket 9 is attached to the head plate flap which extends further over the strut axis and has the length b (cf. A b b 3). The angled leg 9 'has a concentric groove 13 in its middle section starting from its end face 9' ". Because one of the socket pins of socket pin pair 4 penetrates both middle tube 1 and thus support tube 2, the two are fixed to one another in a non-rotatable manner The corresponding corrective alignment of the opposite adjustment bracket 9 is possible because its support tube 3 can be rotated with respect to the main tube 1. Patent claims: 1. Three-part civil engineering strut, adjustable in length by screw adjustment, with on the front ends of the mutually displaceable parts arranged with asymmetrical head plates Adjustment angles, characterized that the civil strut is roughly adjustable at one end in a telescopic manner known per se and the adjustment bracket (9) can be moved in parallel by being tightened from the rear Retaining screws (10) are attached to the head plates (7). 2. civil engineering strut according to claim 1, characterized in that the adjustment bracket (9) in longitudinal slots (11) are displaceable in parallel. 3. civil strut according to claim 1, characterized in that each adjustment angle on the Middle section is fluted concentrically from its end face (9 '"). Considered publications:
German utility model No. 1 785 409;
British Patent No. 225,065;
U.S. Patent No. 597,738. 1 sheet of drawings