LT3155B - Device for fastening - Google Patents

Abstract

Fastening device for connecting profile elements (P1, P2), of which some (P1) exhibit an end-side opening and others (P2) exhibit an undercut groove, having a housing (2, 4) which can be pushed into an end-side opening, having at least one retaining member (6; 6, 8) which is mounted in the housing (2, 4) such that it can move in a longitudinal direction, is non-sprung in the transverse direction and is provided with at least one hook (58; 58, 68) projecting out of the housing, having an actuating device (10) which can be actuated when the housing (2, 4) is pushed in and by means of which the retaining member (6; 6, 8) can move in the longitudinal direction, and having an expansion device (12) which acts on the retaining member (6; 6, 8) such that the hook (58; 58, 68), after insertion into the groove, engages behind the groove in a longitudinal movement counter to the insertion direction. <IMAGE>

Description

The present invention relates to a fastening device, the characteristic of which is set forth in claim 1 of the formula of the invention.

Fastening devices for connecting the profile elements are known. Shelves mounted with such fasteners to profile elements are usually used for fairs and shops. A known connector of this type (DE-PS 31 53 232) consists of a housing and a longitudinally sliding bracket with a hook hooked thereon to hold it behind the recess. Longitudinal sliding occurs in the presence of an eccentric in the housing, the head of which extends through an opening in the housing. The holder springs inside the housing in a transverse direction by means of a tongue along the holder such that the eccentric head may protrude from the housing. By applying a force directed against the spring of the bracket, the eccentric can be pressed into the housing so that the housing can be inserted into the opening at the front of the profile bar. The profile bar has an opening corresponding to the eccentric head, in which the head, when properly aligned, locks. Rotating the eccentric so that the hooks engage the notch, the end of the bracket moves and locks. Now, the eccentric can no longer be pressed into the housing, thus avoiding accidental loosening of the mounting device.

In another known fastening device (EP-A-412 383), the holder is longitudinally incised at the front, forming two flat tongues. Flat tongues have hooks cut in opposite directions, which engage on opposite sides of the notch. Also in the case of this known fastening device, the bracket, due to its respective design, functions as an eccentric spring.

Both units have the disadvantage that the retaining members are relatively difficult to disassemble, since they also act as spring elements, resulting in friction with the housing.

Thus, the main problem of the present invention is to provide a fastening device for joining the profile bars which is easy to operate.

This problem is solved by means of a fastening device, the characteristic of which is given in claim 1 of the formula of the invention.

According to the present invention, the bracket does not spring in the transverse direction, so only a very small initial moment is required to connect the two profile bars. At fairs very often, racks of profile bars are used, using hundreds or even thousands of fasteners. Easy Tensioning of the Machine is the essential criterion by which installation personnel evaluate the fastening Machine. It goes without saying that the same applies to loosening the mount.

Preference is given to devices that handle eccentric devices with an eccentric disc acting on the holder. Eccentrics have the advantage of being able to gain great power with relatively little rotational motion. However, in principle, other types of equipment such as screws are also possible.

The eccentric is generally arranged to move in the transverse direction and, in addition, is pre-tensioned by an elastic device, so that the eccentric head is protruding forward relative to the housing. In addition, the housing may include an internal recess, which, in the case of a non-extended holder, may have an eccentric disc stamped thereon. In the case of an extended bracket, by contrast, the eccentric disc is on the inner surface of the housing, which makes accidental loosening of the mounting device impossible. This has the advantage that the eccentric performs the locking function itself. This avoids the expensive construction of the rear part of the bracket, which would otherwise be needed to slide this part onto the latch. In addition, the eccentric as a structural element is much more stable than the bracket itself, so that the safety function is guaranteed even in the event of an overload.

In the case of known devices, the eccentric disc acts on the holder folds. In the event of heavy overloads, it may happen that the bends will gradually lean back and this will reduce the holding force. According to an exemplary embodiment of the invention, the eccentric disc acts directly on the opening in the holder and thereby achieves substantially greater stability. In addition, the bracket can be brought closer to the housing wall from which the eccentric head protrudes, so that the eccentric cylinder can be made correspondingly longer, which also increases stability.

There are applications where the holding power of known devices is no longer sufficient. For example, the fastening device according to EP-A-0 412 338 engages on both sides of the notch. However, this attachment is asymmetrical, so the holding forces, especially at high moments, may be sufficient. According to the best embodiment of the invention, two brackets are attached - the top and the bottom (the top and bottom of the links are not to be construed as some security constraint, it is intended solely to simplify item assignment). so that one bracket acts on the cut side and the other bracket acts on the other side of the cut. In the best embodiment of the present invention, the fastening device obtains extremely high stability, also in the case of twisting loads.

The brackets are symmetrically clamped behind the notch and, thus, bending and twisting loads are perfectly resistant in any direction and do not break down.

A particularly good embodiment is when the top bracket has two hooks spaced apart and the bottom bracket has one hook located between the top bracket hooks. This helps to save material compared to a design where both hooks are of the same size, i.e. the symmetrical arrangement shall be maintained, so that this structural form may also be subject to particularly high loads in relation to the twisting loads.

Hooks are usually placed on the feet of the brackets. The legs may be curved in relation to the length of the brackets so that the hooks are in a straight line when not extended. In this way, the hooks, depending on the current cut-out width, can be dimensionally stable, i.e., only one hook should be inserted into the cut-out. Thus, it is this design that combines the advantages of a symmetrical layout with a strong hook.

of the appropriate size and just as

The eccentric usually attaches to the bracket. Then the other bracket Constructively this can be solved such that one bracket has a recess which includes a projection or edge of the other bracket.

only one is married. very simple

For example, the upper bracket may have an exit that includes a lower bracket edge. Preferably, the upper bracket has a downwardly directed tongue adjacent to the recess, which is curved such that the lower bracket edge extends into a notch, in other words, adjacent the tongue. Because they are clamped behind the recesses, they are usually angled with respect to each other.

Due to the corresponding design of the tongue, it is used in such a way that the holders are in contact with each other. This further enhances the anchorage stability.

In general, this is a great advantage when the brackets (or bracket and housing) are constructed such that in the unstretched position of the brackets (or bracket) the contact is only at one point or in one line. This results in a significant reduction in friction and thus in the pulling force. This is usually well maintained for almost all movement. Only when fully extended, the brackets are in contact with the inner surfaces of the housing and friction is then high. In this way, the advantage is that, according to this embodiment, does frictional release and frictional release occur already in a very tense position, which again strengthens the holding force.

Based on the next best performance, the bottom bracket edge that fits into the bracket slot fits inside the housing in an extended position. Thus, in the extended position, the lower bracket enters between the lower and upper inner planes of the housing. This again increases the holding force.

The expansion unit usually has a bar mounted inside the housing. In the case of a position closing

In the case of the best tension fastening basically the device is made by way of example, the upper used only one bracket, this transverse can be constructed so that the transverse and housing form one integral whole. If two brackets are used, the advantage is when the expansion bar is housed in the appropriate housing extension and is securely held there. In this case, the spreading bar is between the upper and lower brackets. Moving the bracket backward (in the direction of reverse to simplify marking, the direction in which the brackets move so that their hooks come out of the notch) will continue to be considered, the bracket bends will move toward the extension bar, and thus the brackets will extend apart. It is convenient to have such an expansion crossbar does not require any cost.

immensely

Mounting

The following illustrates the best example of an anchorage device according to the present invention using the drawings.

Therethrough the best, i ^ _xein iicis the present invention, mounting to _eng-x i-OIO longitudinal structural shapes. Section ¹³ with unbroken holder i = uns and embossed eccentric member;

Fig. 2 shows a section similar to Fig. 1, but in this case the eccentric head is locked in the profile opening;

FIG. Figure 3 is a top plan view of the structural form (Figs. 1 and 2) with the housing cover removed;

Fig. 4 is an analogous view of Figs. 1 and 2, in which the constructional shape is shown with the spacers extended;

Fig. 5 is a view corresponding to Fig. 3, in which the constructional shape is shown with the holders extended; and

FIG. 6 is a perspective view of a structural member of the fastening device according to the present invention.

Referring first to Fig. 6, the construction of the fastening device according to the present invention is described first.

The housing comprises a housing main body 1 and a housing lid 2. The housing main body 1 has projections of riveting sealing heads 15, which are inserted into respective openings 17 of the housing cover 2, thus opening the material of the riveting sealing heads 15 when concealed. in the apertures 17 such that a continuous lid surface is formed.

The body main body 1 has a guide opening 9 into which the guide cylinder 33 of the eccentric element 5 is inserted. Around the deflector opening 9, a disc 32 is disposed for the eccentric body 10, into which the eccentric element 5 is retracted. which runs diagonally from rear to front. By the way, the front and top directions are indicated by arrows A and B. These arrows are intended simply to catch the direction.

At the front of the recess holding member 11 lies a lower base plane 14, which rises relatively upright in the front. At about the middle of the transition from the recess for the retaining member 11 to the lower base plane 14, there is a spreading element base 12 at the periphery of the main body portion 1 into which the expansion element 6. is inserted.

The housing cover 2 has a concentric aperture for the eccentric head 19 of the main body 1 about the housing deflection opening 9, which includes the eccentric head 30 of the eccentric element 5. the downward portion lying (with the housing cover closed) on the lower base plane 14 and curved such that it forms an almost symmetrical upper base plane.

The projection 18 and the front section of the main body 1 are constructed such that an opening is formed at the front of the body.

The lower retaining member 4 is inserted into the recess of the main body of the housing for the retaining member 11 and has at its rear end an upwardly directed leading edge 27 which may enter the corresponding recess of the upper holder 3.

Further, the lower holding member 4 has an opening 26; it is elongated so that the lower holding member 4 can move about a protrusion of the riveted closure head 15 disposed on the holding member 11. The lower holding member 4 has a forwardly folded leg 28 with its sole inclined downwards about 180 ° to form way, for hook 29.

The upper holding member 3 is disposed above the lower holding member 4, having a rib 23 on its side, and an opening 22 for the eccentric disk 20 in the region of the eccentric member 5, as well as a hole 22 between the openings 20 and 22. downward tongue 21. The front portion of the upper holding member 3 has two downwardly sloping legs 24, the ends of which are folded up at an angle of about 180 ° and thus form hooks 25.

The assembly of this fastening device according to the present invention is accomplished by: inserting a lower retaining member 4 into the retention body 11 of the housing main body 1. Then, a retracting member 6 is placed on the base extension member 12. a spring 7 is inserted into the guiding hole of the eccentric element 5, and then the eccentric element 5 is inserted into the guiding hole 9 of the main body 1, and then the cap 2 and the riveting cap 15 are immersed in the openings 17 for the rivets. a concise exterior mounting device, wherein the eccentric head 30, actuated by a spring 7, protrudes from the housing cover 2 as shown in the cross-section of Fig. 2.

Further to the invention of this fastening, the construction of Figs.

The operation of the device based on this form is shown

Before inserting the fastener into the opening at the back of the profile PI, its eccentric element 5 must be rotated forward. The spring 7 presses the eccentric element 5 upwards, causing its head 30 to protrude from the housing cover 2. In this condition, the holding members 3, 4 are in an undisturbed position caused by the lower base plane 14 and, respectively, the upper base plane formed by the projection 18, which engage behind the holding members 3, 4 so that their legs 24, 28 are crossed and their hooks 25, 29 are in a quasi-line. The spreading element 5 located between the holding elements 3, 4 prevents further crossing of the holding elements 3, 4.

To insert the mounting device into the opening at the end of the profile PI, the eccentric head 30 is pressed against the spring resistance so that the top of the eccentric head 30 is flush with the outer side of the housing cover 2 as shown in FIG. The mounting device can now be pushed into the opening so that the eccentric head 30 engages in a correspondingly spaced opening 35 in the profile element PI; in this way, the anchorage device returns to the position shown in Fig. 2.

The profile element PI, together with the fastening device fixed therein, is now connected to the next profile element P2 so that the legs 24, 28 of the holders 3, 4 are inserted into the rear recess of the profile element P2. During this process, the deflection projections 13 in the main body part 2 serve the function of guiding the legs 24,28 into the notch while preventing the profile element PI from rotating relative to the profile element P2. Such a top view with the housing cover 2 removed is shown in Fig.3.

In order to secure the profile element PI to the profile element P2, a special key is inserted into the corresponding recess of the eccentric head and turned about 180 °. Due to the eccentric head disk 32 at the upper retaining member recess 20, u

the upper holding member 3 of the effect is pulled back. In this case, the rib 23 of the upper holding member serves as a deflection function between the bottom 8 of the main body portion and the inner side of the housing cover 2. Along with the upper holding member 3, the lower holding member 4 is retracted as its rib 27 engages the tongue 21. As the holding members 3, 4 move backward, they extend one upward and the other downward, as the curves of their legs 24, 28 are in contact. with the front of the expansion element 6. The hooks 25, 29 are thus engaged to engage the profile element P2 (Fig. 4 and Fig. 5) behind the profile element P2 through the mounting device. The eccentric head 30 cannot be pressed in this position by pressing the spring, since the lower plane of the eccentric disk 32 is on the underside of the housing main body 1 8. In the extended position, the holding members 3, 4 are well seated against the inner housing body sides. This affects the lower holding member 4, in particular due to the shape of the recess for the holding member 11, since this recess is directed obliquely downward in the front portion as the lower holding member 4 in the extended position. The rib 27 of the lower holding member 4 engages in a respective recess behind the tongue 21 of the upper holding member 3 and fits onto the housing cover 2. This results in a very well-closed geometrical structure which increases the overall holding force.

The profile elements PI and P2 can be disengaged from one another by simply rotating the eccentric element 5 in the opposite direction by 180 °. In this case, the curves of the holding members 3, 4 legs 24, 28 fit against the lower plane 16 or, in other words, the upper plane formed by the projection 18, causing the holding members 3, 4 to intersect again with each other in their initial position. .

List of structural form elements

Hull main body

Hood cover

Upper holding element

Bottom holding element

The eccentric element

Spring

Bottom

Guide hole

Exterior eccentric

Notch for storage element

Base for the expansion element

Directional protrusions

Lower base plane

Riveted closing head

Slots

Openings for rivets

The protrusion

Opening for eccentric head

Opening for eccentric disc

Tongue

Anga

Edge

Legs

Hooks

6 An opening

Leading edge

Leg

Hook

The eccentric head

Supporting disc

Eccentric disk

Directional disk and

Blind hole

Anga

A Direction of front

B Direction up

Pi Profile element

P2 Profile element

Claims (12)

1. Anchoring device for joining profile members (PI, P2) having an opening at the front of one (PI) and a notch at the rear of the other (P2), characterized in that - a housing (1,2) pushed into the front cavity, - at least one bracket (3; 3,4) disposed in the housing (1,2) so as to be movable in a longitudinal direction without being sprung transversely and having at least one hook (25; 25,29) protruding from the housing, - a control device (5) which is actuated by a recessed housing (1,2) and can be moved longitudinally by means of the holders (3; 3,4), - a spreading device (6) acting on the holders (3; 3,4) in such a way that the hooks (25, -25, 29), when inserted into the recess and pushed in the longitudinal direction opposite to the insertion direction, engage the recess. 2. Fastening device according to claim 1, characterized in that the control device is an eccentric (5) with an eccentric disk (32) acting on the holder (3; 3) and a head (30) passing through the housing opening (19). 3. Anchoring device according to claim 2, characterized in that the eccentric device (5), in the case of an unfolded holder (3; 3,4), is arranged to move in the transverse direction and is tensioned by the elastic device (7) so that the eccentric device the head (30) is protruding from the housing (1,2). 4. Anchoring device according to claim 3, characterized in that the housing (1,2) has an internal recess (10) which, in the presence of an unstretched holder (3; 3,4), presses the eccentric disc against the action of the elastic device (7). (32). 5. Anchoring device according to one of claims 1 to 4, characterized in that the anchoring device consists of one upper and one lower holder (3,4) with hooks (25,29) facing in opposite directions and extending so that the upper one the holder (3) acts on one side of the notch and the lower holder (4) acts on the other side of the notch. 6. Anchoring device according to claim 5, characterized in that the upper bracket (3) has two spaced hooks (25, 25) and the lower bracket (4) has a single hook (29) disposed between the upper bracket (3). ) hooks (25.25). 7. Anchoring device according to claim 5 or 6, characterized in that the hooks (25,29) are arranged on the legs (24,28) of the holders (3,4) and those legs (24.28) are curved in relation to the longitudinal direction of the holders. in the unopened position the hooks (25.29) are in line. 8. The fastening device according to the divergent holder (3) is recessed into the rib (27) of the holder (4). one of claims 5-7, wherein the upper one comprises the lower one 9. Fastening device according to claim 8, characterized in that the upper bracket (3) has a downwardly directed tongue (21), which is bent so that the lower bracket edge (27) is extended in the extended position in the upper bracket (3). Anchoring device according to one of claims 1 to 9, characterized in that the holder (3) or holders (3,4) and the housing are constructed such that the holder (3) or holders (3,4) of the housing (1,2) ) in the unfolded position, touch only a few points or lines, and in the unfolded position, touch the planes. Anchoring device according to claim 9 or 10, characterized in that the rib (27) of the lower bracket (4) fits in an extended position against the inner surface of the housing. Anchoring device according to one of Claims 5 to 11, characterized in that the spreading device comprises a spreading element (6) which is well fixed inside the housing (1,2) and slides the curves of the holders (3,4) when the holders (3,4) ) moves in the longitudinal direction opposite to the insertion direction of the hooks (25,29).