WO1997026422A1

WO1997026422A1 - Assembling coupling

Info

Publication number: WO1997026422A1
Application number: PCT/CZ1997/000002
Authority: WO
Inventors: Borivoj Juran; Miroslav PÍSKA
Original assignee: Cps Profi
Priority date: 1996-01-16
Filing date: 1997-01-16
Publication date: 1997-07-24
Also published as: AU1300197A; SK139697A3; CZ13396A3

Abstract

Assembling coupling consisting of a box (1), gripping element (5) with a hook (6), grooves (13, 16), compression projection (8), supporting tongue (7) and of an operating head (4) with a cam washer (9). Under the operating part (22) of the gripping strip (5) a prestrained leaf spring (10) with an assembly hole (17) is mounted and its shoulders (25) terminated with folds (11) are situated around the pin (20) of the operating head (4) in the channel (30) of the bed (12) provided with a stabilizer (28) and the bed (12) is positioned in the slot (29) of the side opening (18) of the back face (34) of the box (1), wherein the swinging point (32) of the gripping strip (5) is situated under the operating head (4) and the fastening part (23) of the gripping strip (5) is swinging from the box (1) in the direction to the operating head (4). The gripping strip (5) is provided with a dilatation deflection (31) between the compression projection (8) and the hook (6).

Description

Assembling coupling

Field of the invention

The invention relates to a assembling coupling e.g. for connection of a vertical and horizontal construction element by a ligth construction of an assembled exhibition stand.

Background of the invention

At the occation of various exhibitions, presentations or fairs assembled exhibition stands are installed. They can be placed on any place in the fair ground or pavillions. They are assembled and so it is easy to change their size and measures and also the construction elements can vary. The vertical construction elements are usualy frames with the rosette-shaped cross section with grooves. Into these grooves the assembling couplings are fasten and on the assembling couplings horizontal construction elements e.g. bars, flat boards etc. are put on.

There are known assembling couplings which consist of a box, gripping element with a hook, compression projection and supporting tongue and of an operating head with a cam washer. By turnig of the operating head the gripping element is pulled due to the movement of the cam washer into the box and the hook is tightly fasten in the groove of the rosette-shaped frame element. To ensure the stiffness of the assembly it is necessary that the gripping element and the operating head are prestrained and then it is necessary to overcome this prestress by the manipulation with the assembling coupling.

By the known solution the prestress is created in such a way that in the gripping element from elastic steel a strip is sheared out and this is swung out from the plane of the gripping element and this strip has a function of an elastic leaf, which presses the whole gripping element onto the top face of the box and the necessary press on the operating head is created. The operating head is positioned between the gripping element and the top face of the box. Simultaneously also the gripping element is prestrained because the hook is pressed during the engagement with the groove of the rosette of the frame element against the direction of action of the elastic leaf.

By this construction the elastic leaf is simultaneously moved with the gripping element because it is a part of the gripping element. By pulling of the gripping element into the box, the end of the gripping element with the hook is declined in the opposite direction then the operating head on the other side of the gripping element is positioned, it means against the elastic leaf. The pressure on elastic leaf is increasing, the whole assembly is more and more stiff and simultaneously the elastic leaf is moved. To relief such tension there is a recess in the bottom of the box. In the engagement of the hook the gripping element is strained in the same manner as e.g. children's seesaw. The swinging point is in the middle. The pressures on the hook and on the operating head are just opposite. The stress on the elastic leaf by the simultaneous movement during the pulling of the gripping element into the box are often the cause for fatigue of the material and the elastic leaf breaks. Moreover the whole coupling is unnecessary stiff and it creates problems by the assembly and dismantling by the change of construction elements.

The elastic leaf is by the stress disentangled from the base position which is similar to a big letter "S^M. There is no possibility for dilatation, the elastic leaf is stressed in the pull tention and the stable deformation occurs. This is the cause for shorter service-life. The behavior of the elastic leaf during the engagement demands to exert greater effort for the fastening by the manipulation. Because the operator has to fasten very often hundreds of these assembling couplings during a worktime, it is really difficult.

The form of the elastic leaf has as a consequence that by the fastening the operating head slightly declines in the direction to the hook and it has the tendency to slip into the fasten costruction profile. This profile is usualy made from aluminium and teherefore squeezing and deformation of the hole for the operation head occurs which leads to the need of changing of the constructin profile.

Technical characteristics of the invention

The above mentioned insufficiencies are up to a considerable degree eliminated by a assembling coupling according to the invention he subject matter of which is that under the operating part of the gripping strip a prestrained leaf spring wiht an assembling hole is mounted and its shoulders terminated with folds are situated around the pin of the operating head in the channel of the bed provided with a stabilizer and the bed is mounted in the slot of the side opening of the back face of the box, wherein the swinging point of the gripping strip is positioned under the operating head and the fastening part of the gripping strip is swinging from the box in the direction to the operating head. By this arrangement the advantageous press conditions in the coupling are created, because by mounting of a special leaf spring under the operating part of the gripping strip and simultaneously under the operating head, the swinging point of the gripping strip is trasfered under the operating head. By this measure the press conditions on hooking part of the gripping strip will relief and this hooking part with the hook can be easyly operated and the total pressure in the box is lower.

The other characteristic feature of the invention is that the gripping strip is provided between the compression projection and the hook with a dilatation deflection. In this embodiment a better form of the gripping strip is achieved which can expand and again schrink back to the original size.

Description of the figures

The invention will be illustrated in reference to the drawings where Figure 1 illustrates the assebly coupling before the mounting in the groove of a construction profile; Figure 2 shows the same situation in the look from above along the line I-I from Figure 1; Figure 3 is a box from above; Figure 4 presents the back side of the box from Figure 3; Figure 5 presents the the front side of the box from Figure 3; in Figure 6 there is the operation head with a partly cross-section; Figure 7 shows the same head from above; Figure 8 illustrates the gripping strip from the side view; Figure 9 presents the same strip from above; Figure

10 shows a perspective view of the leaf spring and Figure

11 shows a perspective view of the bed for the leaf spring.

Example of the invention embodiment

The assembling coupling showed in Figure 1 consists of a box 1, which is inserted into a construction profile 2., which is usually a flat tube or hollow flat construction element. Practically along the whole length of the box 1 a gripping strip 5. is mounted, which is in its end provided with a hook £. Through this hook JL is then the coupling mounted in a groove of the frame 3_, which together with the construction profile 2. creates the base construction elements of an assembled stand on a fair, exhibion etc. The coupling can not be seen after assembly, only through a hole in the construction profile 2. an access to a operastion head 4. is secured.

It is obvious from Figure 2 that the operating head 4. is provided with a cam 9_ and a pin ifl. Both there elements creates one piece. In the operation head 4. is an recess 1.9 for a wrench. Operation head A is detailed illutrated in Figures 6 and 7.

Operating part .22 of the gripping strip 5. mounted in the box 1 is provided with a retaining tongue 2 which leans against the cam 9. under the operating head 4_. By the turning of the operating head 4_ the retaining tongue 2 is pushed by the cam 9. and the hook 6. is pulled back about the same distance and the construction profile Z is fasten to the frame 2- The coupling is fixed in the construction profile Z by the operating head 4_ protruding from the box l. When there is a need for dismantling of the assembly, then the operating head . is turned about 180° and the cam £ begins to push a compression projection 8. on the gripping strip 5 , which is situated in the direction to the middle of the gripping strip 5. in the distance which is equal with the biggest diameter of the cam £. The hook 6. is pushed out and relieved from the angagement. The coupling is functioning only when the gripping strip 5_ and the operating head 4. are prestrained in the box 1.. This prestrain is achieved by a leaf spring !£>., which leans against the gripping strip 5_ in its operating part 2_2_, which is positioned under the operating head A. The leaf spring XQ. is illustrated in Figure 2 mounted in the box 1 and in Figure 10 in detail. The top part A of the spring 10 which leans against the gripping strip 5_. is cut through by a recess 1_8, which is positioned around the pin 20. of the operating head 4_. Due to the recess 18. two shoulders 25. are formed, which are provided with folds H. These folds 11 are situated in a bed 12 on the bottom of the box 1 under the operation head 4.. The supporting end Z . of the leaf spring lfi is positioned in the opposite half of the bottom. This supporting end 26. is provided with an assembly hole 17.

For the better assurement of a stable position of the leaf spring 12. is it positioned in the bed 12., which is detailly illustrated in Figure 11. This bed 12_. consists of a channel 3_0_ and a stabilizer 22. which ensures a stable positioning of the bed 12 in a slot 2.9 of the side opening 18. of the box l and simultaneously the support for the pin 20 by the operation with the operating head 4. is ensured. The shoulders 25. of the leaf spring I. are situated in the channel 3.0 and so the leaf spring i£ is ensured in a stable position without any nondesirable movement in the box l. The spring £ is stable by the manipulation with the operating head 4. and by the movement with the gripping strip 5..

In Figures 3,4,5 the form of the box 1 can be seen. A back face 2A is provided with the side opening 18. which includes the slot 2£ for stabilizer .28. of the bed 12.. A longitudinal opening 3_6_ on the front face 3_5 of the box 1 make the assembly of the leaf spring ljO easy. A top face 33 is open in the half of its length and so the needed swinging of the hooking part 22, of the gripping strip 5. with the hook & is enabled. Both side faces are, in the area where the hook 6. is placed, provided with beaks 15. which prevent the excessive insertion of the box 1 into the construction profile 2. and they facilitate the dismantling. The bottom face is provided with a bottom opening 2Λ and with a hole for the pin 2/J of the operating head 4..

In Figures 8 and 9 there are details of the gripping strip 5_, which is between the compression projection 8. and the hook 6. provided with a dilatation deflection 21 in the form of a letter "U" which is orientated in the other direction then the compression projection 8. is placed. Further it is provided with grooves 11,16. which improoves its flexibility.

Claims

1. Assembling coupling consisting of a box, gripping element with a hook, rooves, compression projection, supporting tongue and of a operating head with a cam washer, ch a r a c t e r i z e d i n, that under the operating part (22) of the gripping strip (5) a prestrained leaf spring (10) with an assembling hole (17) is mounted and its shoulders (25) terminated with folds (11) are situated around the pin (20) of the operating head (4) in the channel (30) of the bed (12) provided with a stabilizer (28) and the bed (12) is positioned in the slot (29) of the side opening (18) of the back face (34) of the box (1), wherein the swinging point (32) of the gripping strip (5) is situated under the operating head (4) and the fastening part (23) of the gripping strip (5) is swinging from the box (1) in the direction to the operating head (4) .

2. Assembling coupling according to the claim 1, ch a r a c t e r i z e d i n, that the gripping strip (5) is provided with a dilatation deflection (31) between the compression projection (8) and the hook (6).