EP2765356A1 - Portable lighting device - Google Patents

Abstract

The portable lighting device has a lighting device (1) that is provided for supporting the column assembly (4). The column assembly of the lighting device is provided with a stand device (6). The ballast (12) is adapted for providing an electric current for the light emitting device. The ballast is arranged in the longitudinal direction below the column assembly. The ballast is secured to the column assembly. A portion of the bulb is provided to surround the translucent lampshade (2).

Description

The invention relates to a portable lighting device according to the preamble of claim 1.

Transportable lighting devices are known as floor lights and are used, for example, for temporary illumination of a construction site, an accident site or a work area.

The EP 1 059 483 A2 shows such a transportable lighting device. The lighting device consists essentially of a light balloon with a light source, such as a metal halide lamp, and a tripod with retractable telescope, with the aid of the height of the light balloon can be adjusted with the light source. So it is possible to extend the telescope so far that the light source reaches a height of 4 to 5 m, in order to achieve a uniform illumination of the job.

Furthermore, a ballast is usually provided, which is required for providing an electric current and thus for the operation of the metal halide lamp.

The components are designed in terms of their dimensions and their weight so that they can be easily carried by a person. In this way, the lighting device can be easily moved from one place to another.

In known lighting devices, the light balloon with the lighting device is placed on the tripod and electrically connected to the ballast. The ballast in turn is connected to the existing at the work or construction site electrical power supply and usually placed next to the tripod on the floor.

In the fully extended state of the tripod or the telescope, a light point height of 4 to 5 m is usually achieved in known lighting devices. The light bulb surrounding the actual light source (lamp) has a good wind attack surface due to its dimensions. The light balloon, which consists for example of a fabric encloses the light source and thus causes a uniform, glare-free light distribution and a lower luminance of the lamp. Thereby the quality of the illumination can be improved considerably. Such a light balloon is in the EP 1 059 483 A2 shown.

The lighting device has a relatively high center of gravity due to the additional weight of the light balloon, which likewise encloses the lamp at a considerable height. The large wind attack surface of the light balloon in conjunction with the high center of gravity and the large leverage effect when the telescopic elements are extended require additional safety measures in windy working conditions, such as roping with ropes. In this way it should be prevented that the tripod or the entire lighting device can easily fall over. When unstrapping the lighting device with ropes, the ropes (for example, three ropes) extend from the vertical telescopic column and must be secured to the ground by means of pegs. Although this prevents the light device from falling over under the influence of wind. However, the ropes are tripod sleepers and thus a risk of accidents for persons working in the vicinity of the lighting device. In addition, it is not possible for certain types of soil, for example asphalt or concrete, to hammer pegs into the ground without further ado.

However, if the light fixture is not secured from tipping over by roping cables, there is a risk that the device may tip over even in lighter gusts of wind.

The invention is therefore based on the object to provide a lighting device having an increased stability, without the device must be secured by means of guy ropes.

The object is achieved by a portable lighting device with the features of claim 1. Advantageous embodiments are specified in the dependent claims.

A mobile lighting device comprises a lighting device, a pillar device carrying the lighting device, extending in a longitudinal direction, a tripod device supporting the pillar device and a ballast for providing an electric current for the lighting device. The lighting device is characterized in that the ballast is arranged in the longitudinal direction below the column device on the column device.

Thus, the invention provides that the ballast not - as in the prior art - placed next to the lighting device on the ground, but is arranged below the pillar device at this. Due to its structural design, for example as a magnetic ballast transformer, the ballast has a not inconsiderable weight, for example between 8 and 15 kg. Added to this is the weight of the housing of the ballast, which is suitable for construction sites and therefore robust and heavy. Overall, the ballast is a not inconsiderable weight, the fact that it is located below the pillar device at this significantly reduces the center of gravity and thus increases the stability of the lighting device against falling over. The overall center of gravity of the lighting device can thus be shifted downwards.

In particular, the ballast can be arranged at the lower end of the column device, in extension of the longitudinal axis of the column device. In an operating structure of the lighting device in a preferred embodiment, the center of gravity of the ballast is arranged substantially vertically below the center of gravity of the column device, in order to lower the overall center of gravity in this way.

The ballast may be attached to the pillar device. In particular, it is possible that the ballast is releasably attached to the column device, so that the ballast and the column device or the ballast and the tripod device when not in use of the lighting device can be separated again, so that the individual components are again comfortably worn by a person can.

The lighting device may comprise at least one lamp and at least a part of the lamp surrounding at least partially translucent lampshade. In this way, the lighting device may be formed as a so-called light balloon, as he also for example from the EP 1 059 483 A2 is known.

The lampshade may consist of an elliptical or spherical balloon envelope which completely surrounds the illuminant, for example a metal vapor halide lamp. It is also possible that the lampshade or the balloon envelope consists of two halves, of which, for example, the upper half consists of a reflective textile material and the lower half of a translucent material. The light emitted by the light source then becomes reflected by the reflective material of the upper half downwards and thus amplifies the already directly exiting through the lower half of light.

The lighting device may comprise clamping means, wherein the clamping means are fixable in a state of stress, in which the clamping means clamp the lampshade, for holding the lampshade in an open and usable state, and wherein the clamping means are movable to a relaxation state in which the clamping means the lampshade do not cock. With the help of the clamping means thus the lampshade can be spanned balloon-like, so that the screen material does not come into contact with the very hot expectant lamp during operation. Rather, the lampshade surrounds bulbs at a certain distance in the voltage state, so that a uniform light emission can be achieved.

The column device may be a telescopic device, with at least two telescopically linearly displaceable telescopic elements. In practice, it has been found that with the help of three telescopic elements a satisfactory luminous level can be achieved. By telescoping the telescopic elements, the column device can be constructed relatively compact and thereby easily transported. The desired working height of the lighting device is then achieved by extending the telescopic elements.

The stand means may comprise an upper support, which is arranged axially displaceable on the column means, and a lower support, which is arranged in the region of a lower end of the column means, at least three tripod legs, one end of which is pivotally attached to the upper support, and for each of the tripod legs a strut, one end of which is pivotable on the lower bracket and the other end of which is pivotable on the associated tripod leg.

The tripod device ensured by the at least three tripod legs a secure state, so that the supported by the tripod pillar device can also be kept safe and upright when the column device or the telescopic elements of the column device are extended to full working height. The arrangement of the upper bracket, the lower bracket, the three tripod legs and the associated struts each a robust structure is built, which can reliably hold the lighting device even with greater weight. In addition, it is ensured by the pivotability of the tripod legs and the struts that when lifting or axial Move the upper bracket up the tripod device can be folded. As a result, the transport of the lighting device is facilitated.

In a variant, the lower holder can be arranged displaceably on the column device.

At the upper support a stop may be provided for at least one of the tripod legs to limit a pivoting movement of the tripod leg away from the longitudinal axis. The tripod leg can then only be pivoted so far that it strikes against the stop. This position should then correspond to the desired end position, which is to take the tripod leg for safe support of the column device.

At the lower bracket, a stop may be provided for at least one of the struts to limit a pivoting movement of the strut. Also, the strut or - if all struts are provided with stops - all struts can be limited in this way with respect to their pivoting, so that in the operating state all struts and all tripod legs abut their respective stops and can not be pivoted further. As a result, the entire structure is additionally stabilized.

In one embodiment, the ballast can be held by a holding device on the column device. In this respect, the holding device establishes a connection between the column device and the ballast and ensures that the ballast is held below the pillar device.

In an alternative solution, a support means may be provided for supporting the ballast below the pillar means. The carrying device can be designed, for example, in the form of a tray so that the ballast must be placed on it in order to achieve the desired reduction of the center of gravity.

In another embodiment, the ballast on a suspension device, wherein the holding device is connectable to the suspension device to hold the ballast.

The suspension device can have a grip device for supporting the ballast, wherein the retaining device is designed to hold the grip device. This means that the gripping device, which is usually provided on a ballast in order to facilitate the transport of the heavy ballast, can also be coupled to the holding device, so that the holding device holds the ballast on its grip device. In this way, the ballast or the housing of the ballast must not be modified in a special way.

The holding device may have a suspension device for suspending the gripping device of the ballast or a guide device for the linear insertion of the gripping device. In the hanging device may be provided, for example, a suitably trained hook on which the handle device is suspended. The guide device, however, allows the insertion or insertion of the handle device. For example, the guide means may be in the form of a dovetail guide extending transverse to the longitudinal axis of the column means. Accordingly, the gripping device can then be inserted laterally, that is perpendicular to the longitudinal axis of the column device in the guide. The guide device enables rapid attachment of the ballast to the column device. At the same time, however, the ballast can remain reliably and permanently attached to the column device.

On the holding device, a locking device may be provided for locking the handle device in the guide device in a predetermined holding position on the holding device. The locking device is thus able to lock the grip device in such a way that unintentional separation of the ballast from the holding device or the column device is prevented in any case. Only by releasing the locking device, it is possible to push the handle device from the guide device and remove the ballast. The locking device may, for example, have a latching device, so that upon insertion of the handle device into the guide device, the locking device engages upon reaching a certain position, whereupon the gripping device with the ballast is positively secured to the column device. By releasing the latching device, the ballast can then be pushed out of the guide device again.

The holding device may be formed in one embodiment below the lower support of the tripod device. In this way it is possible to provide the holding device and thus - in the intended construction - the ballast at a low-lying as possible.

In one embodiment, the holding device and the lower holder are integrally formed. As a result, a very compact structure can be achieved and overall the structural complexity can be reduced.

Fig. 1

eine seitliche Perspektivansicht einer mobilen bzw. transportablen Leuchtvorrichtung;

Fig. 2

eine Säuleneinrichtung und eine Stativeinrichtung im Betriebszustand (a) und im zusammengelegten Zustand (b);

Fig. 3

eine Griffeinrichtung eines Vorschaltgeräts im getrennten Zustand (a) und im eingehängten Zustand (b);

Fig. 4

eine Griffeinrichtung im gehaltenen Zustand; und

Fig. 5

einen Teilschnitt durch eine Griffeinrichtung.

These and further advantages and features will be explained in more detail below by means of examples with the aid of the accompanying figures. Show it:

Fig. 1

a side perspective view of a mobile or portable lighting device;

Fig. 2

a column device and a tripod device in the operating state (a) and in the collapsed state (b);

Fig. 3

a gripping device of a ballast in the disconnected state (a) and in the suspended state (b);

Fig. 4

a grip device in the held state; and

Fig. 5

a partial section through a handle device.

Fig. 1 shows a portable lighting device in the operating state.

The lighting device can be easily carried by a user - possibly disassembled into a few components - to the place of use or to different locations.

In the upper part of the picture a lighting device 1 designed as a light balloon is shown. The lighting device has in its interior a light bulb, not shown, which is almost completely surrounded by a lampshade 2.

The lampshade 2 is not shown by clamping means in the in Fig. 1 Spanned voltage state shown so that it assumes an ellipse-like outer contour. The lampshade 2 has an upper half 3a a reflective fabric and a lower half 3b of a translucent material.

The light generated in the interior of the lighting device 1 by the lamp or the lamp thus radiates almost completely down and illuminates the underlying work area.

The lighting device 1 is supported on its underside by a column device 4. The column device 4 may be formed as a telescopic device and have a plurality of telescoping elements telescoping. In the example shown, three telescopic elements 5a, 5b, 5c are provided, which can be displaced linearly into one another and locked in their respective relative positions. Corresponding telescopic devices are known, so that at this point a more detailed description is unnecessary.

The column device 4 is supported by a tripod device 6 and in particular prevented from falling over.

The tripod device 6 has three tripod legs 7, which are arranged offset by 120 ° on the circumference. In this way, the tripod device 6 is supported with three provided at the ends of the tripod legs 7 tripod feet 8 on the ground, which allows a safe and defined state in terms of a tripod.

The tripod feet 8 opposite ends of the tripod legs 7 are hinged to an upper bracket 9 pivotally. Approximately in the middle of the tripod legs 7, a strut 10 is pivoted at one end pivotally, the other end extends to a lower bracket 11 respectively.

Due to the interaction of the upper holder 9, the lower holder 11, the tripod legs 7 and the struts 10, a stable supporting structure is formed which reliably holds the upright pillar device 4.

The lower holder 11 is fixedly secured at the lower end of the column device 4, while the upper holder 9 encloses the column device 4 and is axially movable on the latter in the longitudinal direction of the column device 4 back and forth. In this way, the tripod device 6 between the in Fig. 1 shown operating position and a transport position in which the tripod device 6 is folded together to be changed. In the transport position, the upper bracket 9 is moved to the column device 4 upwards, whereupon the tripod legs 7 are applied by the leadership of the struts 10 to the column device 4.

The tripod legs 7 may be formed as a square tube, while the struts 10 are formed in the form of U-profiles. This makes it possible that in the folded transport state, the tripod legs 7 come to rest between the legs of the U-shaped profile of the struts 10, whereby the structure in the collapsed state can be even more compact.

At the lower bracket 11, more precisely below the lower bracket 11, a ballast 12 is attached. The ballast 12 serves as a transformer for providing a corresponding current to the lighting device 1. It is connected to the construction site network, a public grid or a power generator, and converts the power in an appropriate manner. In addition, it serves to ignite the light source in the lighting device. 1

The ballast 12 has a considerable weight. The fact that it is attached to the lower end of the column device 4, the overall center of gravity of the lighting device is moved downward, whereby the stability of the stand and thus, for example, the stability against wind influences is significantly increased.

The ballast 12 has a handle 13 serving as a handle, on which the ballast 12 can be comfortably worn. At the same time the handle 13 is used to attach the ballast 12 to the column device 4, such as Fig. 1 shows.

Fig. 2 schematically shows the column device 4 with the tripod device 6 in the Fig. 1 corresponding operating state ( Fig. 2a ) and in the merged transport state ( Fig. 2b ). Since the principle of opening and closing the tripod device 6 has already been explained above, a new description is unnecessary at this point.

It should be noted, however, that in the open operating state of the tripod device 6, the ballast 12 is attached to the lower bracket 11. To achieve the transport state, the ballast 12 must be removed in advance from the lower bracket 11. In this way, the tripod device 6 can then be conveniently transported with the column device 4.

Fig. 3 schematically shows an example of the attachment of the ballast 12 to the lower bracket 11th

In Fig. 3a It can be seen that the handle 13 is formed on the upper side of the ballast 12. The handle 13 has an opening 14 and a hook member 15.

Accordingly, at the lower bracket 11 ( Fig. 3b ) a holding device 16 is formed, with a hook 16a and an eyelet 16b. The opening 14 of the handle 13 can be hung for attaching the ballast 12 to the lower bracket 11 on the hook 16a, while the hook member 15 of the handle 13 is inserted into the eyelet 16b and hooked there as well.

In cooperation of the opening 14 and the hook member 15 on the one hand and the hook 16a and the eyelet 16b on the other hand, a positive connection between the ballast 12 and its handle 13 and the lower bracket 11 is achieved.

Fig. 4 shows a variant of the attachment of the handle 13 of the ballast 12 to the lower bracket 11 in a schematic representation. In Fig. 5 a partial section through the handle 13 is shown.

The lower region of the lower holder 11 is designed as a holding device 17. In the holding device 17 serving as a guide device dovetail groove 18 is formed, in which the handle 13 can be inserted from the side. The handle 13 has a cross-sectional profile adapted to allow a dovetail effect to be achieved between the handle 13 and the dovetail groove 18, such as Fig. 5 shows.

After insertion of the handle 13 in the dovetail groove 18, the ballast 12 is already positively secured to the bracket 11 and thus to the column device 4.

For further protection is an in Fig. 4 shown locking device 19 is provided which has a spring-loaded pin 20, the end of which engages in a recess 21 in the handle 13 when the handle 13 (in Fig. 4 from right to left) is inserted into the dovetail groove 18.

To release the spring-loaded pin 20 is raised so that it is moved out of the recess 21. Then, the handle 13 with the ballast 12 can be pushed out of the dovetail groove 18 again.

In an embodiment not shown in the figures, the ballast is not suspended below the column means, but rather carried by a support means by the ballast is placed on this support means. For example, the support means may provide a tray-like plateau onto which the ballast is placed. In this case, the support device should also be arranged vertically below the column means, so that in this way the upright ballast can cause a lowering of the overall center of gravity.

In the embodiments described and shown in the figures, the ballast 12 was mounted on its handle 13 respectively. In a variant, not shown, a separate suspension device is provided in addition to the handle 13, to which the ballast 12 can be mounted on the column device 4 and the holding device 17.

In a further variant, it is possible that the center of gravity of the ballast 12 is not arranged vertically below the column device 4, but laterally offset somewhat, so that the center of gravity of the ballast 12 is arranged eccentrically to the column device 4. Also in this way, the overall center of gravity can be reduced and the stability of the lighting device can be increased.

Furthermore, it is possible in another variant, also not shown, to attach the ballast 12 by means of wires or ropes to the column device 4 or the tripod device 6.

All these variants have in common that with the help of the mass of the ballast, the overall center of gravity of the lighting device can be moved down.

Claims (15)

Portable lighting device, with a lighting device (1), - a lighting device (1) carrying, extending in a longitudinal direction column means (4); - a column device (4) supporting the tripod device (6); and with - A ballast (12) for providing an electric current for the lighting device (1);
characterized in that - The ballast (12) in the longitudinal direction below the column means (4) on the column means (4) is arranged. Transportable lighting device according to claim 1, characterized in that the ballast (12) on the column means (4) is fixed, in particular releasably secured. Transportable lighting device according to claim 1 or 2, characterized in that the lighting device (1) - at least one lamp; and - At least a part of the light source surrounding at least partially translucent lampshade. Transportable lighting device according to claim 3, characterized in that the lighting device (1) has clamping means, - The clamping means are fixed in a state of tension, in which the clamping means clamp the lampshade, for holding the lampshade in an open and usable state; and that - The clamping means are movable in a relaxation state in which the clamping means do not tension the lampshade. Transportable lighting device according to one of the preceding claims, characterized in that the column device (4) is a telescopic device, with at least two telescopically linearly displaceable telescopic elements (5a, 5b, 5c). Transportable lighting device according to one of the preceding claims, characterized in that the stand device (6) comprises: - An upper support (9) which is arranged axially displaceably on the column means (4); - A lower support (11) which is arranged in the region of a lower end of the column means (4); - At least three tripod legs (7), one end of which is pivotally mounted on the upper bracket (9); and - For each of the tripod legs (7) a strut (10), one end of which is pivotally mounted on the lower bracket (11) and the other end to the associated tripod leg (7) is pivotally mounted. Transportable lighting device according to one of the preceding claims, characterized in that on the upper support (9) for at least one of the tripod legs (7), a stop is provided to limit a pivoting movement of the tripod leg (7) away from the longitudinal axis. Transportable lighting device according to one of the preceding claims, characterized in that on the lower holder (11) for at least one of the struts (10) is provided a stop in order to limit a pivoting movement of the strut (10). Transportable lighting device according to one of the preceding claims, characterized in that the ballast (12) is held by a holding device (16, 17) on the column device (4). Transportable lighting device according to one of the preceding claims, characterized in that - The ballast (12) has a suspension device (13); and that - The holding device (16, 17) with the suspension device (13) is connectable to hold the ballast (12). Transportable lighting device according to one of the preceding claims, characterized in that - The suspension device has a handle device (13) for supporting the ballast (12); and that - The holding device (16, 17) for holding the handle device (13) is formed. Transportable lighting device according to one of the preceding claims, characterized in that the holding device (16, 17) comprises: - Hanging means (16a, 16b) for mounting the handle means (13) of the ballast (12); or - A guide device (18) for linear insertion of the handle device (13). Transportable lighting device according to one of the preceding claims, characterized in that on the holding device (17) is provided a locking device (19) for locking the handle device (13) in the guide device (18) in a predetermined holding position on the holding device (17). Transportable lighting device according to one of the preceding claims, characterized in that the holding device (17) is formed below the lower holder (11). Transportable lighting device according to one of the preceding claims, characterized in that the holding device (17) and the lower holder (11) are integrally formed.

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