DE1869159U - CLAMPING AND SPREADING DEVICE FOR CONCRETE FORMWORKS. - Google Patents

Description

December 14, 1962 G / Z

Hans-Dieter Elaiss, 7 Stuttgart 13, Landhausstr.

Clamping and spreading device © *? for concrete formwork

The invention relates to one particularly for concrete pillars Od. The like. Suitable tensioning and spreading device, which consists of one between the two each other opposite formwork to be arranged, the distance between the same determining the plastic pipe with a preferably continuous thread thread worked into its inner wall as well as two tensioning screws exists that penetrate the formwork from the outside and into the one located in the plastic pipe Engage internal thread.

In the case of tensioning and spreading devices, the one denoted above The type of plastic pipe that determines the distance is generally cut to a certain length and yi / eist a strake that is just buckling as a result of the compressive stress acting on one end face prevents ". ITm now to reduce the specific axial pressure the contact surfaces opposite the

Sc3ialun.2en to enlarge it is customary on the free linden made of plastic Hohres Plastic cones that open outwards diverge and one the Burch'Gritt of the turnbuckles have an axial bore that enables it.

By using this on the two free üenden the Hohres v / ird to add lümststoffjiegel a sufficiently large investment is achieved and so that the specific Azialdruok is reduced, but is the use of this plastic handle is still insofar disadvantageous, ε-Is this still on the construction site specials need to be placed on the spacer tubes, There is also the advantage that a certain number of people -Lunstotofficegel get lost, which then veroleibanden horny the 3gann and Sprei device are worthless for at least as long as fcein. ^ rsats for the missing HunstetoffIcegel has been made. Ultimately, however, the Eohre are already in production cut to their predetermined length, hence the internal thread in general can be cut. But now the distances

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Arish of the formwork walls are different, is required There is a relatively large holding of different iter lengths.

These existing difficulties and components become according to the invention -Now eliminated thereby, dsS on the

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screw 8 screwed into the other end of the drill, by a simple and relatively easy aurehsufdhrenaes pulling the two-sided tensioning screws S can then see the [formwork tightly clamped, - "whether ei is guaranteed, ü.s.3 the InüeneD-stand, amk the light- -.; - 3ite .D alternate with the formwork boards 4 rjewsils is the same.

! So now. Even if the inlay surface formed by the end face 3 of the tube is sufficiently large and the tube 1 does not drill into the soft formwork 4 with its end faces 3, the thickness of the tube 1 and the purchaser of the inneagei7indes 2 are advantageously dimensioned in this way that the two end faces 3 of the Eohres at least three times as large as the cross section of the threaded hole 2 is.

Since the tube 1 is made of Suns material, while the tensioning screws 8 are made of all-metal, care must be taken to ensure that all of the threads 14 of the internal thread 2 are sufficiently strong as those exerted by the G-shaped 15 of the screw thread 10 receive axial pressure, this requirement is, for example, in the ^S: shown ig 4 G-estaltung of the thread formed as Eundgewinde, shown in section meet this is all I by..?

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Line 15 delimited the guerschni'ct ± § of the interior

vjan & uiig of the drill 1 worked out G-ewincle- ^ ans 14 at least double bo large "/ ie the through the line 13 delimited -cross-section 13 of the £ ur clamping screw 8 corresponding thread gang it 15

"Fig. 5 shows a cross-section, corresponding to Fig . 2, of an etvis.s other embodiment in which the same 'IViIe are stranded with the same Besugsseichen, here is always the otherwise general washer, , "jie them also in the 2ig. 1 and is gsseivt, a profiled sheet metal 20 is provided, which with its ailments ßciien'ieln 21 ablie.gt the Santhola 6 and its.;. at'celteil 22 is again the contact area for the screw head 15, which is designed as a hexagon in diesea 1-811. Due to this special profile of the hech 20 between the inner surface 23 of the middle part 22 and the outer surface of the hantholes 6, a channel-like space denoted by 24 remains, which enables a rivet to be inserted into a hole 26 machined in the neck 25 of the clamping screw 8 27, a cotter pin or the like can be inserted, which prevents any aziala 'displacement of the base plate 20 relative to the screw head 13 and then holds aas 31ech 2C in place. This fixation of the sheet metal 20 is significant in so far as the ilecn 20 can no longer be lost.

Both in the above-treated base up to oh 20 as well as in the otherwise customary underlay plate 11, the bore for the clamping screw 3 is advantageously eccentric, ie - au Serhalt- the horizontal öehv ^; arranged erpunk'oachse. By this Aaßnahue take the lilech 20 or the "untorlagscheioe 11 a limited vertical position -3in, in which a system on both the upper and the lower square timber 6 osw .. 7 is guaranteed.

Since, ^T 3ie explained previously v / iaräe, the slope of the Ge ^ inde ^ ength 14/15 with regard to the required self-healing some '.. · β3 nich "u can exceed and consequently the feed of the clamping screw β in one revolution is still relatively small, Fig. 5 shows an embodiment of the clamping screw 3, ie in which this feed is doubled. This is achieved by the clamping screw 8 not only having a thread corresponding to the internal thread 2 26, but additionally has an o-thread which acts in the opposite direction to this Sevvinde 28 and which is cut into the ornamental oak between the aforementioned thread 28 and the screw head 13, which is also seohskantfö'rnigen in this thread. This Se ^ inde 29 is still a spindle nut 50 is assigned, which rests on the outer surface of the washer 11 or on a sleeve serving the same purpose.

screw 3 given a turn, as a result of the sieve. the free 2nde of the clamping screw Ö by means of their Thread 23 screwed into the internal thread 2, so is at the same time the spindle nut 30 is sucked against the outer surface of the washer 11/20 and, as soon as also the pipe 1 rests with its end face 3 on the inside of the shuttering board 4, the geivanschve ϊ-e stiele amen der.-JehalungsDretter 4 over the. iiantiiölser and 7 causes.

The! Ig. 7 finally shows an embodiment, by means of which the advance of the tensioning screw 8 itself cannot be frergrb'fier, but the required s-easant advance of this tensioning screw 8 can be reduced. .Su. For this purpose, instead of the spindle nut 30 provided for in the case of the execution form dealt with at a later date, there is a straight-line Yorgasehen designated 31, externally designed as a BooksLrant, which is pushed onto the shaft 32 of the screw 3. However, the bore 33 machined into the Hülco 31 is not arranged axially on its own longitudinal axis, but rather has a slight inclination with respect to its own longitudinal axis. If this sleeve 31 is now placed with its end face 34 on the outer surface of the washer 11, the bore 33 becomes tangled with respect to the longitudinal axis - the clamping screw S uad clamps on the flat surface of the shaft 52., - ". 'Ircl the clamping screw 8 now

further sucked in, so v / ira thereby the ElsLicKvirlning the Ixilae 32 enlarged.

The 3shaft 32 of the clamping screw 0 is beyond that

^ usrsehnitt for example, a vierfcantforalgen Schs.ft i> 2, and is'u the bore 33 of the sleeve 31 similar aiisge- "bildc-t, then the sleeve 51 awar on the shank 32 of the clamping screw 8 to be longitudinally displaceable, but torsionally still imaer connected to this washer; 3-axle 32. However, this means that the clamping screw 8 can also be given the required rotational movement by means of the externally seehsüantfoiTiigen sleeve 31 and thus the screw hole 13 may be omitted.

Claims (14)

hat s a η s 3 r il s ι: e 1. Clamping and spreading device for concrete sheaves, consisting of one between the two each other opposite formwork to be arranged, the distance between the same determining with a built into its interior, preferably continuous thread in both sides Tension bolts penetrating the formwork from outside intervene, characterized in that the 2 ear (1) inaccessible with its two end faces (3) on the opposite inner edge of the brace. 2. Yorrichtung nscii claim 1? characterized, that the !! ohr (1) ^ oncontinuously under equilateral ! production of a continuous, through, en G-ewindas (2) is divisible. 3. Yorrichtung according to claim 1 and 2, characterized by going nseiohnet, that the '/ and strength of the Hohres (1) and the diameter of the u-e ^ indabohrung (2) are dimensioned such that the two iFront surfaces (3) of the Echres (1) each "at least three times as large as the cross-section of the thread boring (2). 4 »device according to .Cnsprach 1 to 5, characterized in that the cylindrical edge surface of the ear (1) is smooth and / or flexible. 5. Apparatus according to claim 1 to 4, characterized in that that the tensioning screws (8) each have one Washer (11, 20) or the like. Is arranged that down with the associated clamping screw (8) cannot be released, but is rotatably connected. 6. Device according to claim 5> characterized, that the washer (20) through a Jliete (27) » a split pin, a, nut, a! spring, a by the ijaf v / as en or younger rolling of the thread (10) conditional deformation of the Sewindeschaxtes odor too one other preliminary bead-like deformation of the oCiiraubenhalses (25) od. The like. Against a loosening of the Screw (8) is secured. 7. Apparatus according to claim 5 and 6, characterized in that the washer (20) is deformed in such a way that its the formwork (S, 7) sugekehrten inner surface (23) and the outer surface of the formwork (6,7) is still sufficient large intermediate rim (24) for which the washer (20) securing iilen.:&nt (27) remains. 3. Vov'i / ichtung according to claim 5 to 7, characterized in that "that the hole machined in the washer (11, 20) for the screw shaft (8) is outside the center of gravity, is therefore arranged eccentrically. 9 «device ns oil claim. 1 to 8, characterized in that that the thread (2, 10) is designed as an external thread and its profile is designed in such a way that the cross-section (17) of the from the Innenwanäung "des Hohres (1) worked out (iewindegaüges (14) min— at least twice as large as the ^ u er section (19) of the zur Tensioning screw (S) belonging to the Ö-ewindeganges (15). 10. The device according to claim 1 cis 9> characterized in that in each of the clamping screws (6) a double thread (28,29) is cut, "d eat g ^- ewindegänge opposite one another and on the one hand the internal thread (2) of the Xlohres (1 ) and on the other hand to the thread of a .xiutter (30) or dgsL, which rests on the outside of the washer (11, 20) and serves as a ΰ-counter bearing. 11. The device according to claim T to 8, characterized in that an Alemoi sleeve (31) is pushed onto the formwork (6,7) protruding switch (p2) of the Bpanxic screw (8), the bore (33) of which relative to the longitudinal axis of the clamping screw (G) has a tendency that the sleeve (31) is tilted and festklemiiit on the ScLraubenschaft (32) once it engages the outer segment of the 3 _c halung (6,7). 12. The device according to claim 11, characterized in that the screw shaft (32) has a non-round tread and the axial recess (53) of the Elemmhu'lse (31) this profile is adapted. 13. Apparatus according to claim 11 and 12, characterized The locking sleeve (31) must also be used Screw shaft through hxaenter or Heilvi-irliung set ^ ird. 14. Sowing Yorriohtung. Claims 11 to 13, thereby geke ^ naeichnet, ü.a: -?> the Iilemmhülse (31) so designed isx, ctEß them in holes, beware, etc. intervenes, the εη of the clamping screw (S) are attached.