CONNECTION DEVICE

Abstract: The present invention relates to an arrangement (1) for a connection (2) designed to provide detachable connection of pairs of elements by means of a displaceable piston capable of actuation by spring force, which is capable of being accommodated internally within a cavity in a connection sleeve (8) with the retaining end of the piston and capable of being locked in the connection position by means of a locking screw that is capable of interacting with an inclined tensioning surface in the piston and with a gripping device projecting from said cavity on the connecting end of the piston facing outwards from the cavity in the aforementioned first element. A lock is present between the aforementioned sleeve and the piston to limit the projection of the piston from the internal cavity of the aforementioned sleeve.

Description: Connection device The present invention relates to a connection arrangement designed to provide detachable connection of pairs of elements by means of a displaceable piston capable of actuation by spring force, which is capable of being accommodated internally within a cavity in a connection sleeve with the retaining end of the piston and capable of being locked in the connection position by means of a locking screw that is capable of interacting with an inclined tensioning surface in the piston and with a gripping device projecting from said cavity on the connecting end of the piston facing outwards from the cavity in the aforementioned first element. The principal object of the preεent invention is to provide a connection which is capable of being assembled and then used without the risk of its constituent components working loose from one another in the connection. Said object is achieved by means of an arrangement in accordance with the present invention, which is characterized essentially in that a lock iε present between the aforementioned sleeve and the piston to limit the projection of the piston from the internal cavity of the aforementioned sleeve, which lock is arranged at a distance from the accommodating part of the locking screw in the sleeve of the connection selected in such a way that it essentially coincides with the distance between the tensioning surface and a gripping and interacting stop for the lock in the piston. The invention is described below with reference to the accompanying drawings, in which: Fig. 1 shows a plan view of a connection in the position ready for connection viewed from below; Figs. 1A and IB show end views of the connection; SUBSTITUTESHEET Fig. 2 shows a plan view of a connection in the position ready for connection viewed from the side; Fig. 3 shows a sectional view along the line III-III in Fig. 2; Fig. 4 shows a sectional view along the line IV-IV in Fig. 2; Fig. 5 shows a plan view of a connection in the position ready for connection viewed from above; Fig. 6 shows a sectional view of the connection along the line IV-IV in Fig. 5; Fig. 7 shows a sectional view of the connection in the connected position; Figs. 8-8C show a first illustrative embodiment of a locking piston; Fig. 9 shows a second illustrative embodiment of a locking piston; and Fig. 10 shows an accommodating body viewed in perspective. An arrangement l for a connection 2 designed to provide detachable connection of pairs of elements 3, 4 , such as building elements, by means of a piston 6 capable of being displaced by a spring 5 through actuation by spring force, which piston is capable of being accommodated internally within an elongated cavity 7 in a connection sleeve 8 with the retaining end of the piston 9 and capable of being locked in the connection position K by means of a locking screw 10 that is capable of interacting with an inclined tensioning surface 11 in the piston 6, and with a gripping device 12 projecting from said cavity 7 on the connecting end 14 of the piston 6 facing outwards from the cavity 13 in the aforementioned first element, comprises a lock 15 for the aforementioned piston 6. More specifically, the aforementioned lock 15 is present between the aforementioned sleeve 8 and the piston 6 in order, with the connection in its installed position, to limit the projection of the piston in the direction 16 from the internal cavity 7 of the aforementioned sleeve. The aforementioned lock 15 is arranged at a distance A from the accommodating part 17 of the locking screw in the sleeve 8 of the connection selected in such a way that the distance A essentially coincides with the distance 13 between the tensioning surface 11 of the piston 6 and a gripping and interacting stop 18 for the lock 15 in the piston 6. The lock is preferably in the form of a pivoting tongue 15 in the sleeve 8 of the connection. Present at the freely pivoting end 19 of the locking tongue is a locking part 21 thickened in a direction inwards towards the centre 20 of the sleeve. The aforementioned locking part 21 is preferably so arranged as to be capable of being accommodated in a tapering part 22 or some other recess in the piston 6 in the aforementioned locked position. In order to permit simple manufacture of the connection 2, and in order to obtain a sprung effect in the locking tongue 15, the sleeve 8 is made of plastic material. In order to permit the desired connection of the elements 3, 4 in the desired angular positions, pairs of pistons 6, 6' are present which exhibit gripping devices 12, 12' arranged at an angle in relation to one another, which gripping devices fit and are accommodated in inlet openings 23 in an opposing element 4. The piston 6 is appropriately accommodated in a hole 7 which extends along the central axis 20 of the sleeve inside the sleeve 8, and in the bottom 24 of which the pressure spring 5 is accommodated so as to act between a sleeve end wall 25 and the rear end 9 of the piston. The aforementioned screw 10 acting between the sleeve 8 and the piston 6 is capable of being screwed into a removable receiving body 17 in the sleeve 8 which exhibits a channel 28 extending across the intended threaded 26 receiving space 27 of the screw. The aforementioned receiving body 17 and an intended receiving hole 29, which extends crosswise through the sleeve 8 and perpendicular to its longitudinal hole 7, exhibit congruent form. In order to permit simple and reliable installation of the connection 2, the peripheral form of the aforementioned body 17 and the hole 29 is asymmetrical, and preferably rectangular. The lock 15 retains the piston 6 in the sleeve 8 in such a way that the connection 2 does not disintegrate after it has been assembled and installed. In other respects the connection 2 functions in the same way as previously disclosed similar connections, for example as disclosed respectively in SE,B,465 279 and 457 454, in that the screw 10 is screwed, using an Allen key that fits in the hexagonal socket 30 in the screw, through a transcurrent opening 31 in the element 3, so that the screw 10 with its angled point 32 presses against the tensioning surface 11, causing the piston 6 to be displaced against the bottom of the sleeve in the direction of the arrow 33, in conjunction with which the gripping device 12 is forced against the wall 34 of the second element 4 provided with a hole 23 for the purpose of clamping the elements 3, 4 against one another with the connection 2 concealed inside the element 3. The invention is not restricted to the illustrative examples described above and shown in the drawings, but may be varied within the scope of the Patent Claims without departing from the idea of invention.

Claims: F37 P5PCT LG/KOE P a t e n t C l a i m s 1. Arrangement (1) for a connection (2) designed to provide detachable connection of pairs of elements (3, 4) by means of a displaceable piston (6) capable of actuation by spring force, which is capable of being accommodated internally within a cavity (7) in a connection sleeve (8) with the retaining end (9) of the piston and capable of being locked in the connection position (K) by means of a locking screw (10) that is capable of interacting with an inclined tensioning surface (11) in the piston (6) and with a gripping device (12) projecting from said cavity (7) on the connecting end (14) of the piston facing outwards from the cavity (13) in the aforementioned first element, characterized in that a lock (15) is present between the aforementioned sleeve (8) and the piston (6) to limit the projection of the piston from the internal cavity (7) of the aforementioned sleeve, which lock (15) is arranged at a distance (A) from the accommodating part (17) of the locking screw in the sleeve (8) of the connection selected in such a way that it essentially coincides with the distance (B) between the tensioning surface (11) and a gripping and interacting stop (18) for the lock (15) in the piston (6). 2. Arrangement as claimed in Patent Claim 1, characterized in that the lock is in the form of a pivoting tongue (15) in the sleeve (8) of the connection. 3. Arrangement as claimed in Patent Claim 2, characterized in that present at the freely pivoting end (19) of the tongue is a locking part (21) thickened in a direction towards the centre (20) of the sleeve. 4. Arrangement as claimed in Patent Claim 3, characterized in that the locking part (21) is so arranged as to be capable of being accommodated in a tapering part (22) of the piston (6) in the aforementioned locked position. 5. Arrangement as claimed in one of Patent Claims 2-4, characterized in that the sleeve (8) is made of plastic material. 6. Arrangement as claimed in one of Patent Claims 1-5, characterized in that pairs of pistons (6, 6') exhibit gripping devices (12, 12') arranged at an angle in relation to one another. 7. Arrangement as claimed in one or other of the above Patent Claims, characterized in that the piston (6) is accommodated in a hole (7) extending through the sleeve (8), in the bottom (24) of which a pressure spring (5) is accommodated so as to act respectively between a sleeve end wall (25) and the end (9) of the piston. 8. Arrangement as claimed in one or other of the above Patent Claims, characterized in that the locking screw (10) is capable of being screwed into a removable receiving body (17) in the sleeve (8), which exhibits a channel (28) extending across the intended receiving space (27) of the screw. 9. Arrangement as claimed in Patent Claim 8, characterized in thatthe receiving body (17) and an intended receiving hole (29) exhibit congruent form. 10. Arrangement as claimed in Patent Claim 9, characterized in thatthe peripheral form of the body (17) and the hole (29) is asymmetrical, and preferably rectangular.

Inventors: WAAHLIN OLOF, WAAHLIN, OLOF
Applicants: FOGA SYSTEM INTERNATIONAL AB, WAAHLIN OLOF, WAAHLIN, OLOF
Application year: 1995
Main classification: F16B7
IPC codes: E04B1, F16B7