QUICK SOCKET FOR STRUTS

Abstract: A quick socket and a strut, especially for transport vehicles, and comprising a strut and a socket fitting thereto and comprising a carrier portion (3) and a locking portion (4), in which the carrier portion (3) is adapted to receive the strut with some play, and in which the locking portion (4) is formed with one or more key means (9, 10), which are resiliently biassed in the direction upwards-inwards towards the center of the carrier portion (3) whereby the key means press the strut to a play-free contact with the carrier portion (3). The key means (9, 10) is/are slidable in obliquely extending slots (11) in the sides of the locking portion. For positively securing the strut against un-intentional removal from the quick socket, the quick socket has a bayonet like locking groove (6, 7), which cooperates with a projecting shoulder of the strut.

Description: LAXO MEKAN AKTIEBOLAG Quick Socket for Struts The present invention relates to a quick socket for a strut, especially for transport vehicles, and of the type which is mounted at the wagon bridge, the frame or any other part of the vehicle and is arranged to releasably connecting of generally vertically mounted struts. For many 'transport purposes there is a need to temporarily arrange struts on the vehicle for holding the load which may be timber or any type of unit of goods which are piled on top of each other. In order to provide a simple and quick mounting the strut ought to be easily detouchable preferably without the use of any tool. Quick socket for struts are previously known which quick socket comprise an open sleeve which is mounted at the wagon bridge or any other part of the vehicle and in which the strut is simply let down and is supported by a flange in the strut or a bottom flange of the carrier sleeve. The strut is maintained in the sleeve depending on its own weight, but many times this is not sufficient, especially not if the load is secured by means of any type of coupling means which engages the strut and acts upon said strut by a force which has some component force directed vertically upwards. For solving this problem it has been suggested that the quick socket be formed with a bayonetcatch-like groove and that the strut be formed with a pin projecting from the side of the strut, which pin by cooperation with the bayonet catch groove secures the strut against unintentional vertical movement upwards from the quick socket. Such an apparatus gives a good holding and securing of the strut, but in order that the strut easily might be mounted and dismounted there must be some play between the strut and the strut socket. On load transportation, when the strut generally is loaded in the radial direction the said play is removed but on empty transportation the play is strongly noticable, especially since the wheel springs of the transport vehicle thereby often act very hardly since the springs which are calculated for a suitable spring action in loaded condition are very little loaded on empty transportation. Depending on the play and the hard spring action, the strut and the quick socket are subjected to strong wear, and generally there is also an annoying chattering. Another type of previously known strut is mounted free from play in that the strut is formed with one or more conical portions, which key on corresponding portions of the socket, and in that the strut is secured in the socket by means of a screw acting from underneath. The removing of the strut from such playfree socket is rather time consuming and tools must be used for releasing the attachment screw. It aslo may happen that the strut has keyed so hard in the socket that strong forces must be used for releasing the socket. The object of the present invention therefore is to solve the problem of providing a socket for a strut, especially for transport vehicles, which socket is formed so that the strut quickly and easily can be mounted in the socket and dismounted therefrom, which gives a connection between the strut and the socket which is free from play and in which the strut without play is well secured in the socket even on empty transportation. The invention therefore relates to a quick socket and a strut, especially for transport vehicles, and comprising a strut and a sleeve fitting thereto and adapted to be mounted at the wagon bridge or any other part of the vehicle and having a space for the strut which with some play fits the strut, and the invention is mainly characterized in that the quick socket comprises one or more upwards-inwards to the center of the socket actuated key means which allow a free movement downwards of the strut in the socket but which forces a strut received in the space against the socket thereby providing a joint between the strut and the socket which is free from play, and which prevents an un-intentional movement upwards of the strut in the socket. Preferably the key means comprises two wedge bodies which are movable in obliquely extending plots in the socket, and said wedge bodies are biassed in the direction upwards by a spring. The strut may easily be removed in that the key means is pressed slightly downwards against the action of the spring. The socket preferably can be formed with a bayonetcatch-like groove for cooperation with a projecting shoulder of the strut. The said groove suitably is sloping slightly downwards at the bottom thereof so that the shoulder of the strut automatically and depending on the weight of the strut and on vibrations is automatically forced to the innermost and lowermost portion of the bayonetcatsh-like groove. Further characteristics of the invention will be evident from the following detailed description in which reference will be made to the accompanying drawings. In the drawings figure 11 diagrammatically and in a perspective view shows a quick socket according to the invention seen from above, and figure 2 correspondingly shows the quick socket of figure 1 seen from underneath. Figure 3 is a view from above of a slightly modified embodiment of a quick socket, and figure 4 is a cross-section along line IV-IV of figure 3. The quick socket illustrated in figures 1 and 2 is adapted to a circular cylindrical strut 1 which at or adjacent the lower end thereof has a projecting shoulder 2 for securing of the strut in a corresponding groove in the socket. The socket generally comprises a carrier portion 3 and a locking portion 4, in which the carrier portion 3 is in part circular cylindrical extending over an angle of at least 1800 or preferably slightly more, and in which the carrier portion 3 is open to the locking portion 4. The carrier portion has a strut receiving space 5 which with some play allows a movement downwards of the strut into the carrier portion. For securing the strut against unintentional movement upwards after having been mounted the carrier portion is formed with a bayonet catch like groove comprising a vertical slot 6 on each side of the locking portion 4 and adjacent said portion and making it possible to move the strut down with the shoulder 2 in the groove 6. The vertical groove 6 is directly connected to a recess 7 a the lower part of the carrier portion, whereby the slot 6 together with the recess 7 in combination forms the bayonet catch like groove. The lower edge of the recess 7 is preferably slightly sloping downwards so that the strut 1 with the shoulder 2 resting on said lower edge of the recess 7 automatically slides down to the innermost and lowermost part of the recess and thereby prevents an un-intentional removal of the strut from the carrier portion. For providing a joint between the strut 1 and the carrier portion 3 which is free from play the locking portion 4 comprises two key means 9 and 10, a first means provided at the upper end of the socket and the other key means provided at the lower end of the socket. The key means 9 and 10 are mounted in obliquely extending slots 11 in the locking portion, and the key means are biassed in the direction upwards by springs or similar means, whereby the keys while sliding in the slots 11 move in a combined movement upwards and inwards to the carrier portion, so that the keys force the strut into a contact with the carrier portion which is free from play. Preferably the key means 9 and 10 are designed with a bow formed surface 12 corresponding to the peripheral surface of the strut so that the carrier means together with the bow formed surfaces of the keys nearly completely enclose the strut. When mounting the strut in the quick socket the strut is moved into the socket from above with the shoulder 2 in any of the two vertical slots 6 whereupon the strut is let down or is pushed downwards, whereby the wedge means 9 and 10 are pressed downwards-outwards by the strut to allow a substantially free movement downwards of the strut in the socket. In the down position the strut is rotated so that the locking shoulder 2 is enclosed in the bottom recess 7 and is secured against unintentional movement upwards. The spring loaded wedge means 9 and 10 thereby force the strut to a play-free contact with the carrier portion 3, and the wedge means 9 and 10 in addition thereto contributes to prevent an unintentional movement upwards of the strut even if the strut for some reason may have rotated so that the locking shoulder 10 is positoned online with the vertical slots 6. A releasing and removal of the strut is made in that the wedge means manually or by means of any simple tool is pressed down indicated with the arrow 13 in figure 1, whereby the strut is released and may easily be lifted out from the quick socket. Figures 3 and 4 show an embodiment of the invention in which the carrier portion 3 is a part of a cylinder, and in which the locking portion 4 is a triangular box which is welded to the outer surface of the cylinder. The obliquely extending grooves 11 are formed in that blocks 14 and 15 having grooves are welded to the sides of a lock portion box 16 at the upper part and the lower part thereof respectively. The keys 9 and 10 are slidable in the grooves 11 of the blocks 14 and 15. The lower key means 10 is biassed in the direction upwards by a spring 17 acting between a fixed cross bar 18 in the box 16 and the bottom surface of the key 10. For actuating the upper key 9 and the lower key 10 , concurrently a bow formed bar 19 is provided between the upper surface of the wedge 10 and the lower surface of the wedge 9, and preferably the bar 19 is welded to the upper wedge 9. The bow formed bar 19 also provides the vertical slot 6 through which the projecting shoulder 10 of the strut can be moved downwards, and in this case the strut may be rotated in either direction for engagement with the bayonet recess 7 on either side of the carrier portion. In figure 3 is shown like in figure 1 that the upper key means may have a vertical bore 20 in which a tool can engage for forcing the two keys downwards thereby releasing the strut from the socket. It is to be understood that the above description and the embodiments of the invention illustrated in the drawings are only illustrated examples and that many different modifications may be presented within the scope of the appended claims.

Claims: P a jt e n t k r a v 1. Quick socket and strut, especially for transport vehicles, and comprising a strut (1, 2) and a socket fitting therewith and having a sleeve (3) adapted to be mounted at the wagon bridge or'any other part of the vehicle and the space (6) for the strut (1, 2) which space with some play fits the strut, c h a r a c t e r i z e d in that the quick socket comprises one or several upwards-inwards to the center of the socket actuatable key means (9, 10) which allow a free movement downwards of the strut (1,#2) in the socket, but which prevent an un-intentional movement upwards of the strut from the socket after having been mounted. 2. Quick socket according to claim 1, c h a r a c t er i z e d in that the socket is formed with a carrier portion (3) adapted to enclose the largest portion of the strut (1), and a locking portion (4) which includes the key means (9, 10) and means (17) for biassing the key means upwards-inwards to the center of the socket. 8 3. Quick socket according to claim 1 or 2, c h a r a c t er i z e d in that it is formed with two separate but mutually interconnected key means (9, 10), one key means provided at the upper part of the socket and the other key means provided at the lower part of the socket. 4. Quick socket according to claim 2 or 3, c h a r a c t er i z e d in that the locking portion (4) is formed with a guide (14, 15) for the key means (9, 10), which guide is formed as an obliquely downwards-outwards extending groove (11) in which the key means (9, 10) is/are slidable. 5. Quick socket according to any of claims 2-4 c h a r a ct e r i z e d in that the wedge means (9, 10) is biassed in the direction upwards-inwards towards the carrier portion (3) actuated by one or more springs (17), whereby the key means (9, 10) press the strut (1) into a play-free contact with the carrier portion (3). 6. Quick socket according to any of the preceding claims, c h a r a c t e r i z e d in that the socket is formed with a bayonet like locking groove (6, 7; 6', 7), which cooperates with a radially outwards extending shoulder (2) of the strut (1) for preventing an un-intentional movement upwards of the strut from the quick socket. 7. Quick socket according to claim 6, c h a r a c t er i z e d in that the bayonet like groove at the lower part thereof is ended by a downwards sloping surface along which the shoulder (2) of the strut tends to slide upon rotation of the strut to ,a point (8), in which the strut is positively locked by the bayonet groove (6, 7). 8. Quick socket according to claim 6 or 7, c h a r a c t er i z e d in that the vertical part (6') of the bayonet like groove is formed as a vertically open part of the carrier portion (3), and in that the horizontally extending part of the bayonet groove (7) opens from the carrier portion on each side of the vertical open groove (6').

Inventors: PERSSON, AKE R.
Applicants: LAXO MEKAN AKTIEBOLAG
Application year: 1983
Main classification: B62D27
IPC codes: B62D33, F16B7