EP0092054B1 - Portable display board - Google Patents

Description

The invention relates to a mobile demonstration board, which consists of two board panels each framed by a U-shaped profile frame, which are hingedly connected to one another and which has two legs on the lower profile frame. Such a mobile demonstration board is the subject of DE-OS 27 10419.

In the known demonstration board, the legs are designed as components to be transported separately from the other demonstration board. They are attached to the U-shaped profile frame using a screw each time the board is used.

The possible separation of the legs from the demonstration board makes the demonstration board relatively small in volume for transportation, but the transportation of the legs often causes annoyance. They are relatively bulky because of their feet, which usually form an angle of 150 degrees, and tend to rattle in the trunk of passenger cars, scratch each other or even damage the board plates. Furthermore, it is often perceived as a disadvantage that the legs are not adjustable in height in the known, mobile demonstration board. Height adjustment is desirable, for example, if a demonstration board is to be used not only as a partition or writing board, but also as a projection surface.

With the known demonstration boards, it is also cumbersome to lock the two unfolded board boards.

In the known mobile demonstration panel, the hinges are each arranged on the outside on one leg end of the hinge band on one leg end of the profile frame, so that it is possible to pivot the panel plates until they come to lie on one another. If you do not swivel a board, then the other board must be swiveled by 180 degrees when folded.

Because of the projecting hinges, the two sliders serving as locking devices may only bear against the profile frame on the side adjacent and opposite the hinge. On the side of the slider adjacent to the hinge, an elongated hole is provided in it, through which a threaded pin projects from each leg end in the locking position. A spherical screw head is screwed onto each of these two threaded pins. In this way, the slide is held on the leg ends and the leg ends are locked in one plane.

In order to lock the known, mobile demonstration board on one level, it is necessary to first loosen the two screw heads holding the slide in the basic position, then pushing up the slide and then screwing all four screw heads tight. This required handling is often perceived as too cumbersome, especially if, for organizational reasons, a demonstration board only has to be set up in front of the audience. Apart from this, the appearance of a demonstration board is adversely affected by the projecting hinges and screw heads and the elongated hole in the slide. In the field of communication technology in particular, however, great value has been placed on a pleasing design for some time.

The German utility model DE-U 77 18 526 also includes a partition. Legs known, which are designed as separate components, each consisting of a support rod and fixedly attached, outward-facing feet. The support rods can be inserted into the side parts of the partition from below.

The known partition will usually be set up before an event or even stay in one place in offices, so that its handling is less important than with a mobile demonstration board. However, partitions are usually not set up individually; rather, a room is often delimited by several partitions standing side by side. However, the known partition walls cannot be set up directly next to each other at an angle to one another, because then the feet of two neighboring partition walls would stand on one another. This problem is avoided in the partition according to the aforementioned DE-U 7718 526 in that the partition is designed to be bendable about vertical axes between its legs. However, such a measure is hardly feasible with a demonstration board, because one wants to avoid vertical interruptions of the board surface where possible.

The invention has for its object to develop a mobile demonstration board of the type mentioned, which is particularly quick and easy to bring from the folded transport state to the use position or vice versa and is therefore quick and easy to use and which at any angle next to an identical, can be placed on another demonstration board without the feet of the demonstration boards interfering with each other.

This object is achieved according to the invention by the features specified in claim 1.

The main advantage of the demonstration board according to the invention is that the legs can remain on it when the demonstration board is transported. The fact that the rails are height-adjustable on the profile frame allows you to transport the legs Push up until your feet are against the lower profile frame area. The feet can then be swiveled into the board level. Due to this displaceability and pivotability, the legs in the transport position interfere only insignificantly, especially since a handle for carrying the demonstration board is provided between the legs anyway and projects in the same direction as the legs.

In addition to the fact that the legs can be brought into a position favorable for transport by the invention, they enable the height of the demonstration board to be adjusted, which is often necessary and desirable, for example if the demonstration board is to be used as a projection surface.

The fact that the feet of the legs can be pivoted continuously and independently of one another about a vertical common axis, it is possible to adjust the feet at such an angle relative to the plane of the demonstration board that even with demonstration boards standing next to one another, the feet are adjacent Demonstration boards do not interfere with each other.

An advantageous embodiment of the invention is specified in claim 2. It does not protrude the necessary screw for attaching each rail with the U-shaped profile frame over the outer contour of the demonstration board, which on the one hand looks advantageous, on the other hand, there is no risk of getting caught with clothing or bumping. Because the passages in the rails are provided in a fixed grid, the height of the demonstration board can only be adjusted in fixed steps. If you adjust the legs on each side by the same number of passages, then it is inevitably ensured that the demonstration board is upright.

It is advantageous if an end cap is placed in the closed profile of the rail from above. This measure closes the rails at the top. At the same time, each end cap forms an end stop by coming into the lowest position of the rail against the screw holding the rail on the profile frame and thereby preventing the rail from being accidentally pulled downwards from the profile frame.

It is advantageous if the feet of the legs have a marking indicating their angular position relative to the rail. If, for example, three demonstration boards are to be arranged next to each other in such a way that they each enclose an angle of 120 °, i.e. form a half hexagon, then you can first set the inner feet at an angle of 60 ° to the board level and the outer feet of the adjacent demonstration boards set to an angle of 120. If the demonstration boards are then set up in such a way that the feet run exactly next to each other, then the demonstration boards inevitably form an angle of exactly 120 °.

The attachment of the feet to the rail is particularly simple if this is done as specified in claim 5.

In order to avoid having to fold the demonstration panel according to the invention to connect the two panel plates to one another by means of two separate suitcase locking brackets so that the demonstration panel cannot open automatically, the measure specified in claim 6 is expedient.

The connection of the folded-up board plates takes place automatically when a tab as specified in claim 7 is provided on the handle.

The feet of the legs take up little space during transport if they are designed as in claim 8.

It is also advantageous if the demonstration board is designed as specified in claim 9.

Although such a demonstration panel differs from the previous one only in relatively simple measures, it has numerous advantages over it. Since the hinges no longer protrude beyond the outer contour of the profile frame, the slides can now grip completely over three side surfaces of the profile frame. As a result, two opposite sides of the slide are able to lock the leg ends of the profile frame in the opened position, so that no forces have to be transmitted via screw pins and a longitudinal groove in the slide. Apart from the fact that the locking device is thereby made simpler and therefore cheaper to manufacture, thanks to the invention, its appearance is improved considerably since all three side surfaces of the slide can be smooth and without longitudinal grooves or bores. The hinges arranged within the outer contour are completely covered in the locking position of the slide, which also looks optically more advantageous than the projecting hinges. With this in mind, there is always the risk of protruding components or even injuries to projecting components. It can also happen with the known demonstration board that your clothes get caught on a screw head or hinge and then, as a result of a hasty movement, outline the whole demonstration board.

In addition to these advantages already mentioned, it should be mentioned that the handling of the demonstration board according to the invention is significantly improved compared to the previously known demonstration board, since it is no longer necessary to actuate each of the two locking devices. and two screw heads each loosen and tighten again.

An advantageous embodiment of the invention is specified in claim 10. The measures identified there make it possible to hold the slides axially displaceably on the leg ends of the profile frames in a simple manner without screwing means.

It is also advantageous if each clamping edge has an inclined intake surface on the outside of the slide, because the slide can then be pushed up from the side of the profile frame for assembly. The catchment areas cause an expansion of the slide. When the clamping edge is behind the profile frame, the slider snaps together and is held axially displaceably on the profile frame.

Another advantageous embodiment of the invention is that the slides are limited in their axial displaceability by a projection at the lower leg end of the profile frame. In this embodiment, the slides are pushed back to release the locking and slide into the locking position when released, provided that their displacement is sufficiently smooth. With this design, it is impossible for the sliders to get out of the locking position by themselves.

It is also advantageous if the projection is covered by the slide in the locking position, because the demonstration board then looks very advantageous and because there is then no risk of the user bumping into or getting caught with the clothing.

Another favorable embodiment of the invention is specified in claim 14 and consists in the fact that the hinge band sides to be fastened in the leg ends of the profile frames have barb-like bends. In this embodiment, the hinge band sides need only be pushed or hammered into corresponding guide pockets of the profile frame and are then automatically held there against slipping out.

• Figur 1 eine Ansicht einer erfindungsgemäß gestalteten Demonstrationstafel von vorn gesehen,
• Figur 2 einen Blick auf einen unteren Eckbereich der Demonstrationstafel gemäß Figur 1, teilweise im Schnitt dargestellt,
• Figur 3 einen Querschnitt durch die Demonstrationstafel gemäß Figur 2 entlang der Linie 111-111 in Figur 2,
• Figur 4 zwei aufeinender geschwenkte Füße eines Standbeines der erfindungsgemäßen Demonstrationstafel,
• Figur 5 die Demonstrationstafel gemäß den Figuren 1 - 4 im Bereich ihres Handgriffes in aufeinandergeklappten Zustand, teilweise geschnitten dargestellt,
• Figur 6 eine Ansicht von der Seite auf zwei aufeinanderstoßende Schenkelenden der Profilrahmen der mobilen Demonstrationstafel gemäß Figur 1 bei hochgeschobenem Schieber,
• Figur 7 die Anordnung gemäß Figur 6 von der Rückseite gesehen,
• Figur 8 einen Querschnitt durch den Profilrahmen der Demonstrationstafel gemäß den Figuren 6 und 7,
• Figur 9 ein für die Erfindung wesentliches Doppelscharnier von der Seite gesehen,
• Figur 10 das Doppelscharnier gemäß Figur 9 von oben gesehen,
• Figur 11 einen Querschnitt durch einen eine Arretiervorrichtung bildenden Schieber,
• Figur 12 den Schieber gemäß Figur 11 im Längsschnitt.

The invention allows numerous design options. One of them is shown in the drawing to clarify it and is described below. Show it

• FIG. 1 shows a view of a demonstration board designed according to the invention from the front,
• FIG. 2 shows a view of a lower corner area of the demonstration board according to FIG. 1, partially shown in section,
• FIG. 3 shows a cross section through the demonstration board according to FIG. 2 along the line 111-111 in FIG. 2,
• FIG. 4 shows two feet of a supporting leg of the demonstration board according to the invention which are pivoted one on top of the other,
• FIG. 5 shows the demonstration board according to FIGS. 1-4 in the area of its handle in the folded-up state, shown partly in section,
• 6 shows a side view of two abutting leg ends of the profile frame of the mobile demonstration board according to FIG. 1 with the slider pushed up, FIG.
• FIG. 7 the arrangement according to FIG. 6 seen from the rear,
• FIG. 8 shows a cross section through the profile frame of the demonstration board according to FIGS. 6 and 7,
• FIG. 9 a side view of a double hinge essential to the invention,
• FIG. 10 the double hinge according to FIG. 9 seen from above,
• FIG. 11 shows a cross section through a slide forming a locking device,
• Figure 12 shows the slide according to Figure 11 in longitudinal section.

As FIG. 1 shows, the demonstration panel according to the invention consists of two panel panels 1, 2, each of which is framed by a U-shaped profile frame 3, 4. Hinges are not shown, by means of which it is possible to fold the panel plates 1 with the profile frames 3, 4 when sliders 5, 6 have previously been pushed up out of a locking position. The demonstration board stands on two pillars 7,8, each with two feet 9,10. A handle 11 is provided for transporting the demonstration board in the horizontal section of the U-shaped profile frame 4.

FIG. Z shows essential, constructive details of the demonstration board in the region of the supporting leg 7. The main component of the supporting leg 7, which is of course identical to the supporting leg 8, is a rail 12 which extends from the side over the profile frame 3. The rail 12 is closed at the top by an end cap 14 which is firmly seated in the rail 12 and e.g. is held in the rail 12 by an indentation 15. An angle piece 16 is inserted into the rail 12 from below, against which the feet 9, 10 are screwed by means of a screw 17.

The rail 12 is held on the profile frame 3 by means of an Allen screw 18. This hexagon socket screw 18 can be loosened or tightened by means of a hex key, not shown, which can be inserted through a passage 19 in the rail 12. Above the passage 19 are further passages, e.g. 19 'and 19 "are provided, which always have the same distance from one another.

3 shows the design of the rail 12 more clearly. It can be seen that the rail 12 has an externally closed profile 20 which is approximately semicircular in cross section. In this profile 20 the hexagon socket screw 18 which can be reached through the passage 19 is arranged. FIG. 3 also shows parallel profile sides 21, 22 which lie against the profile frame 3 on both sides. The Rail 12 is held in contact with the profile frame 3 by the Allen screw 18 by means of two parallel web sections 23, 24, the Allen screw 18 being guided into the closed profile 20 between the web sections 23, 24.

FIG. 4 shows that the feet 9, 10 have different lengths and can be pivoted about a vertical axis 25 into a position one above the other, in which they take up as little space as possible. The feet 9, 10 lie on one another with hub parts 26, 27. It is not shown that an angle marking can be provided on the outside on the hub parts 27, 28. It is also conceivable to design the feet 9, 10 in the region of the hub parts 27, 28 in such a way that they snap in in a predetermined angular position.

Figure 5 shows another important detail of the invention. First of all, the U-shaped profile frame 4 with the panel plate 2 and the handle 11 can again be seen. The profile frame 4 is shown folded onto the profile frame 3 with the panel plate 1. The handle 11 has a laterally injection-molded tab 28 which engages over the profile frame 3 with a web 29 and thereby holds the profile frame 3 next to the profile frame 4. The tab 28 is biased downward in FIG. 5 and has a draw-in bevel 30 through which the tab 28 with the web 29 is first automatically raised when the profile frames 3 and 4 are folded together, so that it can then snap over the profile frame 3 and the latter holds, as shown in Figure 5. It is important that the handle 11 is attached to the profile frame 3, which also holds the legs 7, 8, so that the tab 28 is loaded with as little weight as possible.

Figures 6 and 7 show the free leg ends of the U-shaped profile frame 3, 4 and the slider 5 pushed upwards. The U-shaped profile frames 3, 4 have at their free ends a receptacle 31, 32, in each of which a hinge 33, 34 sits. The hinges 33, 34 together form a double hinge 35. The hinge 33 is inserted and held with a hinge band side 38 in the profile frame 4 and the hinge 34 with a hinge band side 37 in the profile frame 3. The respective other hinge band sides of the hinges 33, 34 are connected to one another and form a connecting piece 38.

FIG. 8, which shows a cross section through the profile frame 3 which corresponds to the profile frame 4, shows that two pairs of web sections 39, 40, 41, 42 directed towards one another are provided within the profile frame 3. This creates guide pockets 45, 46, one of which serves to accommodate a hinge band side 36, 37.

Figures 9 and 10 show the double hinge 35 more clearly. The hinge band sides 36, 37 and the connecting piece 38 can be seen. Furthermore, barb-like bends 47 are shown on the hinge band sides 36, 37, through which the hinge band sides 36, 37 claw in the guide pockets 45, 46 of the profile frames 3, 4 when they are inserted therein are.

FIGS. 11 and 12 show a cross section through the slide 5, which is identical to the slide 6. It can be seen that the slider 5 is essentially U-shaped in cross section so that it can completely encompass the profile frame from three sides. On its open side, the slider 5 has a clamping edge 48 on both leg ends, which has an intake surface 49 on the outside. The feed surface 49 makes it possible to slide the slider 5 onto the profile frame 3 or 4 from the side.

For stiffening, the slide 5 has longitudinal ribs 50, 51 but also transverse ribs 52, 53. With the lowest rib 52 in the position of use, the slide 5 can lie against a projection 54 shown in FIGS. 6 and 7, so that the slide 5 only up to one predetermined lower position to be moved on the profile frame 4. A corresponding projection is of course also attached to the opposite free leg end of the profile frame 4.

If the demonstration board is to be folded up from the position shown in FIG. 1, the slides 5, 6 are first pushed upwards. Then you can swivel the plate 2 down. The hinge 34 first rotates until the horizontal edge of the recess 32 of the profile frame 3 sits on the connecting piece 38. The plate plate 2 is pivoted by 90 ° in this position. Upon further pivoting, the connecting piece 38 pivots about the hinge 33 and enables the remaining pivoting path of another 90 °. In the end position, with the correct dimensioning of the connecting piece 38, the plate plates 1, 2 lie exactly on top of one another and cannot slip in their plane relative to one another.

In the construction of the mobile demonatration panel, after the panel plate 2 has been folded up, it is only necessary to pull the slides 5, 6 down until they bear against the projections 54 in order to lock the demonstration panel in the opened position.

Claims (15)

1. A mobile demonstration board which consists of two panels each bordered by a U-shaped sectional frame and articulately connected to one another by means of hinges and which has two supporting legs, characterised by the following features:

a) each supporting leg (7, 8) has a rail (12) engaging over the lateral sectional frame (3) from the side,

b) each rail (12) is secured to the sectional frame (3) for adjustment in height,

c) each supporting leg (7, 8) has, at the under side, on the rail (12), two feet (9, 10) which are pivotable continuously about a common vertical axis (25) and independently of one another.

2. A mobile demonstration board according to claim 1, characterised in that each rail (12) comprises, at the outside, a closed section (20) and has openings (18, 19', 19") there in a fixed pattern, through which at least one screw (screw 18 with a hexagonal recessed hole) connecting the rail (12) to the sectional frame (3) can be actuated depending on the position in height of the rail (12).

3. A mobile demonstration board according to claim 1 or 2, characterised in that an end cap (14) is placed in the closed section (20) from above.

4. A mobile demonstration board according to claim 1 or one of the following, characterised in that the feet (9, 10) of the supporting legs (7, 8) have a marking indicating their angular position in relation to the rail (12).

5. A mobile demonstration board according to claim 1 or one of the following, characterised in that the feet (9, 10) are secured to an angle member (16) which is pushed into the closed section (20) from below.

6. A mobile demonstration board according to claim 1 or one of the following, characterised in that the handle (11) has a moulded on resilient strap (28) which is engageable over the sectional frame (3) of the adjacent panel (2) in the folded state.

7. A mobile demonstration board according to claim 1 or one of the following, characterised in that the strap (11) is prestressed in a position holding the adjacent sectional frame (3) and, during the folding together of the panels (1, 2), is movable temporarily out of the path of movement of the folding sectional frame (3) by means of a recessed bevel (30), but is then able to snap over the sectional frame (3).

8. A mobile demonstration board according to claim 1 or one of the following, characterised in that the feet (9, 10) are of different length and are adapted to bear against one another with a hub portion (26, 27) and can be pivoted about the vertical axis (25) into a position in which one completely covers the other.

9. A mobile demonstration board according to claim 1 or one of the following, characterised in that the connection of the free ends of the arms of the sectional frames (3, 4) is effected, in each case, through a double hinge (35) formed from two hinges (33, 34-), one hinge strap side (36, 37) being secured to one end of the arm of the sectional frame (3,4) in each case and the other hinge strap sides (connecting member 38) being connected to one another, that the hinges (33, 34) are arranged inside the external contour of the sectional frame (3,4) and that slides (5, 6) engage round the sectional frames (3, 4) from three sides.

10. A mobile demonstration board according to claim 1 or one of the following, characterised in that the slides (5, 6) comprise, at the sectional frame side with the particular panel (1, 2), a gripping edge (48), facing in the direction of the panel (1, 2) and engaging over the sectional frame (3,4) from both sides, in each case.

11. A mobile demonstration board according to claim 1 or one of the following, characterised in that each gripping edge (48) has an oblique drawing-in face (49) at the outside of the slide.

12. A mobile demonstration board according to claim 1 or one of the following, characterised in that the slides (5, 6) are each limited in their axial displaceability by a projection (54) on the lower end of the arm of the sectional frame (3).

13. A mobile demonstration board according to claim 1 or one of the following, characterised in that the projection (54) is hidden by the slide (5, 6) in the locking position.

14. A mobile demonstration board according to claim 1 or one of the following, characterised in that the hinge strap sides (36, 37) to be secured in the ends of the arms of the sectional frame (3, 4) have barblike bent-up portions (47).

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