EP3275833B1 - Lifting frame of an industrial truck - Google Patents

Description

The invention relates to a mast of an industrial truck with a stationary mast and at least one liftable and lowerable mast component, which is formed by a load-receiving means and / or at least one extension mast, wherein for lifting and lowering the mast component at least one lifting cylinder and at least one traction means is provided the stationary mast has two laterally spaced vertical mast profiles and the at least one traction means is arranged on a lateral outer side of the vertical mast profile, wherein the mast is provided with a lighting device.

Such masts can be designed as einschüssiges mast (so-called single mast) with a stationary mast, in which a load-receiving means, such as a fork carriage, as a liftable and lowerable mast component can be raised and lowered. Such masts can also be designed as a multi-arm mast, for example as a duplex mast, which consists of a stationary mast and a liftable and lowerable mast, or as a triplex mast, which consists of a fixed mast and two liftable and lowerable masts, or quadruple Mast, consisting of a fixed mast and three liftable and lowerable extension masts. In the case of a duplex mast, a triplex mast and a four-arm mast, a load-carrying means can be raised and lowered in the extension mast. In a duplex mast, a triplex mast and a quad mast, the extension mast and the load handler form a liftable and lowerable component of the mast. The mast sections of known masts formed by the stand mast and the extension mast are formed by two laterally spaced vertical mast profiles, which are connected to one another by means of a plurality of transverse struts.

In generic masts is at least one lifting cylinder and at least one traction means is provided for raising and lowering the liftable and lowerable mast component, for example, the at least one extension mast and / or the load receiving means.

In a designed as a duplex mast mast with a stationary mast and a liftable and lowerable mast one or more lifting cylinders are used for lifting the Ausfahrmastes relative to the stationary mast. The liftable in the extension mast and lowered load-receiving means is raised by means of one or more traction means. The traction means is fastened here with a first end to the load-receiving means. With the second end of the traction means is mounted in known masts to the stationary mast and is guided and deflected over a pulley in the upper region of the extension mast. By lifting the Ausfahrmastes relative to the stationary mast by means of the lifting cylinder is thus raised at the same time by means of the lifting cylinder of the extension mast relative to the stationary mast and by means of the traction means the load receiving means relative to the extension mast. To allow between the two laterally spaced vertical mast profiles of the corresponding mast sections of the mast a large field of view for the operator through the mast to the load receiving means, it is already known to arrange the at least one traction means on the outside of the mast, wherein the traction means on a lateral outside the vertical mast profile of the stand mast is arranged.

Such masts are used in industrial trucks, such as counterbalance forklifts, to accommodate and settle loads with the liftable load-carrying means at higher heights, for example, in shelves of a rack warehouse. In warehouses, but also in the dark outdoors, the lighting conditions are often not optimal. It is therefore known to provide a lighting device for the truck, with a work area can be illuminated.

A known embodiment of such a lighting device consists of forwardly focused on the work area headlights, which are grown, for example, in the upper region of the front of a driver's roof of the truck and / or directly above the front wheels in front of the driver's roof on the truck. The attachment is made such that an impairment of visibility is minimized. Nevertheless, due to the size of the headlights an additional obstruction and limitation of the visibility of the operator of the truck through the mast through on the load-carrying means, since the mounted piggyback in the field of view of the operator are on the load-carrying means. In general, the width of the headlights is greater than the width of the spars of the driver's roof, so that obstructions and limitations of the view of the load-carrying means arise at angles of view upwards and downwards by said arrangement of the headlights.

Furthermore, it is already known to provide the mast itself with a lighting device and for this purpose to arrange one or more headlights as a lighting device directly on the mast, for example, grow at the upper end of the mast. Also in this prior art, it is disadvantageous that the cultivation of headlamps on the mast itself, for example, at the upper end of the mast, in addition to the already existing obstructions causing components of the mast the visibility of the operator of the truck through the mast on the Lifting device further deteriorated as another obstacle lying in the field of view. In a lighting device formed by Schweinwerfern is also disadvantageous that the headlights represent only a point light source, so that the work area can not be optimally illuminated.

A mast with the features of the preamble of claim 1 is eg off JP3812183B2 known.

The present invention has for its object to provide a mast of an industrial truck of the type mentioned, with the improved lighting, in particular improved illumination of a working area of the truck, is achieved in protected from damage by the traction means arrangement of the lighting device.

This object is achieved in that the illumination device consists of at least one LED strip with at least one LED light, which is arranged on the lifting cylinder. According to the invention, therefore, in the case of a mast with traction means arranged externally on the mast, an LED strip designed as a light-emitting rail is arranged on the lifting cylinder of the mast. Such an LED strip consists of a sequence of several LED lights, which are arranged for example in a row or any kind of longitudinal arrangement. Since the operator of the truck in the As a rule, the mast profiles with the vertical mast profiles and the lifting cylinders on the right and left are located in front of it within a driver's roof as a driver's workplace. Since in such masts the lifting cylinders are already arranged optimally optimized on the mast in order to achieve the lowest possible obstruction of the operator through the mast to the load receiving means, with the arrangement of the LED bar or the LED strips on the lifting cylinder in a simple manner an arrangement of the illumination device can be achieved on the mast, in which the LED strip or the LED strips lead to no further visual restriction of the operator through the mast to the load receiving means. By a LED strip or multiple LED strips, a high light output can be generated even with relatively low power consumption and a good illumination of the work area can be achieved by arranging several LED lights in a LED bar as a lightbar. Due to the distribution of illumination, for example, a work area on multiple LED lights, the lighting device according to the invention is less punctual as known headlights, so that improved lighting, in particular improved illumination of a working area of the truck is achieved. In generic masts with outboard arranged on the mast traction devices in which the traction means are arranged on the lateral outer sides of the vertical mast profiles of the stationary mast, occur when lifting and lowering the lifting device strong movements and vibrations of the traction means, so that a direct arrangement of an LED bar on the outside of the mast profile of the stand mast would quickly lead to a strong and permanent damage to the LED strip. In such generic masts with outside arranged on the mast pulling means in which the traction means are arranged on the lateral outer sides of the vertical mast profiles of the stand mast, however, allows an arrangement of an LED bar or more LED strips on the lifting cylinder protected from the movements of the traction means Arrangement of the LED strip or the LED strips, so that the movements and vibrations of the traction means can not cause damage to the LED strip or the LED strips.

According to an advantageous embodiment of the invention, the load-receiving means on a front side of the vertical mast profile and the lifting cylinder on a rear side opposite to the load-receiving means arranged vertical mast profile. As a result, with a low construction cost before the traction means protected arrangement of the arranged on the lifting cylinder LED bar or the LED strips is possible in which the LED bar or the LED strips in addition to no further visual restriction of the operator through the mast lead to the load handler

According to an advantageous development of the invention, the at least one LED strip is arranged in the visual shadow generated by the mast between the extension mast and traction means. As a result, a sight-neutral arrangement of the at least one arranged on the lifting cylinder LED bar is achieved in a simple manner, in which the at least one LED bar leads to no further visual restriction of the operator of the truck through the mast to the load receiving means.

Particular advantages arise when an LED strip inside and / or an LED strip is arranged on the outside of the lift cylinder. An LED strip arranged on the inside of the lifting cylinder allows an arrangement of the LED strip, which is particularly protected against damage, since the LED strip is also arranged on the lifting cylinder so as to be protected against damage. An LED strip arranged on the inside of the lifting cylinder can also be oriented in a simple manner such that the working area is illuminated forward to the load-receiving means. An externally arranged on the lifting cylinder LED strip allows in a particularly simple manner an illumination of the work area to the side.

The internally arranged LED strip is oriented according to an advantageous embodiment of the invention with a main illumination direction in the longitudinal direction of the mast on the load receiving means and thus oriented in the direction of travel of the truck is arranged on the lifting cylinder. As a result, an illumination of the working area is achieved in a simple manner to the front.

The externally arranged LED strip is oriented according to an advantageous embodiment of the invention with a main illumination direction in the transverse direction of the mast to the outside and thus oriented transversely to the direction of travel of the truck is arranged on the lifting cylinder. As a result, an illumination of the work area is achieved in a simple manner to the side. Particular advantages arise when the LED strip is attached according to an advantageous embodiment of the invention to the lifting cylinder by an adhesive connection or by a screw connection. The attachment of the LED strip by an adhesive connection or by a screw connection makes it possible in a simple way to retrofit an existing mast with at least one inventively arranged on the lifting cylinder LED strip. The attachment of the LED strip or the LED strips with a screw has the further advantage that a defective or damaged LED strip can be easily and quickly replaced.

Advantageously, according to a development of the invention, the LED strip is secured against rotation secured to the lifting cylinder. With a rotationally secured attachment of the LED strip or the LED strips on the lifting cylinder can be easily prevented that the LED strip or the LED strips can rotate on the circular lifting cylinder, so that a collision with vertically traversing Components of the mast can be safely prevented.

According to an advantageous embodiment of the invention, the at least one LED strip is fastened by means of holders on the lifting cylinder. With appropriately designed holders, the LED strip or the LED strips can be easily attached to the circular lifting cylinder. The holder can be attached by an adhesive connection to the lifting cylinder or clamped by a screw on the lifting cylinder.

If the holders are each provided with at least one stop surface which results in a rotationally secured attachment of the LED strip by abutment with the vertical mast profile, a rotationally secured attachment of the LED strip or the LED strips to the lifting cylinder can be achieved in a simple manner.

The LED strip can shine monochromatic, in particular white, according to an advantageous embodiment of the invention. With a white illuminated LED strip, the function of a worklight or a driving lamp can be easily created by the LED strip to illuminate the work area. It is also additionally conceivable to provide automatic dipped and dipped headlights by dimming the LED strip in order to reduce the glare effect if necessary.

The LED strip can shine according to an alternative and also advantageous embodiment of the invention in different colors, in particular green, red, yellow and white. For example, by mixing white light with yellow light in fog or bad weather, an optimized working light can be generated and thus the visibility in fog and poor visibility can be made better than when using white light. With different colors, more functions of the LED strip can also be achieved in a simple manner and / or information can be displayed by means of the LED strip.

Preferably, the LED strip is designed as work lighting and / or as driving lights. One or more LED strips on the lifting cylinder allow good illumination of the vicinity with low glare effect of oncoming traffic. As a result, a good illumination of the work area is achieved. With an LED strip that generates white light, these functions can be achieved easily. If the LED strip can additionally produce yellow light, for example by corresponding yellow glowing LED lights or additional yellow glowing LED stripes, the lighting situation can be influenced in a simple manner and optimized fog light or bad weather can be generated by yellow light is mixed with white light.

Furthermore, the LED bar can be configured as a load status display, wherein the load condition of the truck is indicated by differently colored light of the LED bar. This makes it possible to display the utilization or condition of the truck in different colors, for example by red, a heavy load, with which only a limited operation of the truck is possible, and / or by green, a load in a weight range without restrictions. Outsiders in the vicinity of the truck can thus be easily identified for possible dangers.

Furthermore, the LED strip can have a turn signal function and / or a warning vision function. By preferably yellow light, which is issued in particular flashing, can be easily generated a turn signal function for cornering and / or Warnblickfunktion.

Furthermore, the LED strip can be designed as a charge capacity indicator of the truck, in particular as a state of charge indicator of a traction battery of a battery-electrically operated truck or as a level indicator of a tank of an internal combustion engine-powered truck. By switching on certain LED lights can be visualized in a simple way, which state of charge the truck has.

Furthermore, the LED strip can be designed as a coming home function. The truck may have an electronic control device with a wireless data connection and the electronic control device may output a signal for switching on the LED strip, in particular via a key or a smartphone app for putting the truck into operation. As a result, a coming home function can be achieved in a simple manner, in which by a key function already when approaching the truck, the LED bar is activated and so, for example, the right truck from several parked trucks in a fleet can be found quickly.

Furthermore, the LED strip can be designed as a maintenance and / or status indicator of the truck. By turning on or flashing certain LED lights or by visually outputting a particular code, it is easy to display required maintenance or other status messages.

According to an advantageous embodiment of the invention, the mast has two laterally spaced lifting cylinder, on each of which an LED strip is arranged.

If the mast has two laterally spaced lifting cylinder, on each of which at least one LED strip is arranged, the LED strips on the two lifting cylinders may have the function of a cornering light, the LED strips operated on the two lifting cylinders in dependence on the steering angle become. Such cornering light can be implemented in a simple manner when the LED strip arranged on the side facing away from the curve is dimmed or switched off as a function of the steering angle.

Particular advantages can be achieved if, according to an embodiment of the invention, the LED strip is operated in dependence on the direction of travel of the truck with different colors. The internally arranged LED strip, which is arranged with the main illumination direction in the longitudinal direction of the front of the truck arranged mast and thus oriented in the direction of travel of the truck on the lifting device on the lifting cylinder, for example, when driving forward of the truck with the load receiving means ahead generate white light and when reversing of the truck generate red light. If at the rear of the truck also an LED bar is arranged, which generates red light when driving forward the truck and when reversing the truck with the rear of the vehicle generates white light, a return light can be generated with low construction costs, in which a forward movement of the Truck generates the LED bar on the mast white light and the LED light bar at the rear of the vehicle red light and generates the white light on the mast red light and the LED light bar at the rear of the truck when driving backwards of the truck.

According to an advantageous embodiment of the invention, the internally arranged LED strip can monochrome white or multicolor, in particular red, yellow and white, shine.

According to an advantageous embodiment of the invention, the externally arranged LED strip in one color white, green, red or yellow or multi-colored, in particular red, yellow, green and white, shine.

According to an advantageous development of the invention, the LED strip has an integrated cable guide for electrical lines and / or for a hydraulic line, or a cable guide for electrical lines and / or for a hydraulic line is arranged on the LED strip. In the LED bar can be integrated with particular advantage a cable guide for electrical cables and / or for a hydraulic line. Likewise, the LED strip can form a holder for such cables and / or hydraulic lines. As a result, electrical lines and / or hydraulic lines can be laid on the lifting cylinder and thus on the mast in a simple manner.

Figur 1

ein erfindungsgemäßes Hubgerüst in einer Vorderansicht,

Figur 2

das Hubgerüst der Figur 1 in einer perspektivischen Vorderansicht,

Figur 3

das Hubgerüst der Figur 1 in einer perspektivischen Rückansicht,

Figur 4

eine Ansicht gemäß Pfeil A der Figur 1,

Figur 5

eine perspektivische Seitenansicht des Hubgerüstes in einer vergrößerten Darstellung und

Figur 6

eine perspektivische Seitenansicht des Hubgerüstes in einer vergrößerten Darstellung.

Further advantages and details of the invention will be explained in more detail with reference to the embodiment shown in the schematic figures. This shows

FIG. 1

an inventive mast in a front view,

FIG. 2

the mast of the FIG. 1 in a perspective front view,

FIG. 3

the mast of the FIG. 1 in a perspective rear view,

FIG. 4

a view according to arrow A of FIG. 1 .

FIG. 5

a perspective side view of the mast in an enlarged view and

FIG. 6

a perspective side view of the mast in an enlarged view.

In the FIGS. 1 to 6 is an inventive mast 1 of a truck, for example, a counterbalance forklift shown. The mast 1 of FIGS. 1 to 6 is designed as a duplex mast without free lift, which is also referred to as a simplex mast.

The mast 1 consists of a stationary mast 2 and a raised in the mast 2 and lowered extendable mast 3. The mast 2 is formed, for example, as an outer mast and the extension mast 3 as an inner mast. In the extension mast 3, a load-receiving means 4 is arranged raised and lowered. The load-receiving means 4 comprises in the illustrated embodiment, a fork carriage. On the fork carrier not shown forks can be attached with two forks.

The stand mast 2 is formed by two laterally spaced vertical mast profiles 2 a, 2 b, which are interconnected by means of a plurality of cross members 10, 11, 12. The extension mast 3 is formed from two laterally spaced profile rails 3a, 3b, which are interconnected by means of a plurality of cross members 15, 16.

In the mast 1 according to the invention of the extension mast 3 and the lifting device 4 forms a liftable component of the mast 1. For raising and lowering the Ausfahrmastes 3 and the lifting device 4 in the illustrated embodiment, two lifting cylinders 5a, 5b and two traction means 6a, 6b are provided. The traction means 6a, 6b are formed in the illustrated embodiment as lifting chains. The lifting cylinders 5 a, 5 b each comprise a cylindrical housing, which is supported on the stationary mast 2 in the vertical direction, and an extendable piston rod which is fixed to the extension mast 3. In the upper region of the extension mast 3, a deflection roller 18a, 18b is further attached, via which the traction means 6a, 6b is guided and deflected. The traction means 6a, 6b is fastened in each case with a first end 19a to the load-receiving means 4 and with a second end 19b on the stationary mast 2.

When retracted piston rods of the lifting cylinder 5a, 5b of the extension mast 3 is retracted and the load receiving means 4 is lowered. If the piston rods of the lifting cylinder 6a, 6b extended upward, the Ausfahrmast 3 lifts relative to the stationary mast 2 and the traction means 6a, 6b at the same time the load receiving means 4 is raised relative to the Ausfahrmast 3. The lifting cylinders 5 a, 5 b thus raise the extension mast 3 and, via the traction means 6 a, 6 b, the load-receiving means 4.

In the FIG. 4 is furthermore the longitudinal direction L of the mast 1 and the transverse direction Q of the mast 1 illustrated with corresponding arrows.

The mast profile 2a of the mast 2 and the mast profile 3a of the extension mast 3 form a left mast side of the mast 1. The mast profile 2b of the mast 2 and the mast profile 3b of the extension mast 3 accordingly form a right mast side of the mast.

In the mast 1 according to the invention, the traction means 6a is arranged on the left lateral outer side A1 of the mast profile 2a of the stationary mast 2 designed as an outer mast. Accordingly, the traction means 6b is arranged on the right lateral outer side A2 of the mast profile 2b of the stationary mast 2 designed as an outer mast.

In the mast 1 according to the invention, the lifting cylinder 5 a is arranged on the left mast side of the mast 1 and the lifting cylinder 5 b on the right mast side of the mast 1. In the mast 1 according to the invention, the load-receiving means 4 on a front side V of the vertical mast sections 2a, 2b of the outer mast formed as a stationary mast 2 is arranged. The left-hand lifting cylinder 5 a is arranged on a rear side R of the left vertical mast profile 2 a of the stationary mast 2 formed opposite the load-receiving means 4, and the right-hand lifting cylinder 5 b is on a rear side R of the right-hand vertical mast profile 2 b of the upright mast 2 opposite the load receiving means 4 arranged.

The mast 1 is provided with a lighting device 20, which according to the invention consists of at least one LED strip 21a, 21b, 22a, 22b, each with at least one LED lamp, which is arranged on the lifting cylinder 5a, 5b.

In the illustrated embodiment, at least one, in the illustrated embodiment, two LED strips 21a, 22a are disposed on the left and right lifting cylinder 5b at least one, in the illustrated embodiment, two LED strips 21b, 22b arranged on the left lifting cylinder 5a. The LED strips 21a, 21b, 22a, 22b are each arranged in the longitudinal direction of the lifting cylinders 5a, 5b.

In the FIG. 4 Furthermore, an eye of the operator B of the truck is shown and it is illustrated with corresponding lines L1-L4, the visual shadows S1 and S2 of the mast 1, resulting from the mast 1 for the operator B of the truck when passing through the mast 1 therethrough looks at the load handler. The line L 1 passing from the eye of the operator B past the rear trailing edge of the left traction means 6 a and the line L 2 passing from the eye of the operator B to the front leading edge of the left mast profile 3 a of the mast 3 formed as an inner mast , Define here a left visual shadow S1 of the mast 1 between Ausfahrmast 3 (mast profile 3a) and traction means 6a. Accordingly, in this case define the line L3, which extends from the eye of the operator B at the rear trailing edge of the right traction means 6b, and the line L4, of the eye of the operator B at the front-side leading edge of the right mast profile 3b as Inner mast trained Ausfahrmastes 3 passes, this case a right Sichtschatten S2 of the mast 1 between Ausfahrmast 3 (mast profile 3b) and traction means 6b.

Like from the FIG. 4 it can be seen, the LED strips 21a, 22a are arranged on the left lifting cylinder 5a, that the LED strips 21a, 21b are arranged in the generated from the mast 1 left visual shadow S1. The LED strips 21b, 22b are arranged on the right-hand lifting cylinder 5a in such a way that the LED strips 21b, 22b are arranged in the right-hand visible shade S2 produced by the mast 1. The LED strips 21a, 21b, 22a, 22b are thus arranged on the mast 1 for the operator B, and lead to no additional obstruction of the operator's vision through the mast 1 to the load receiving means 4.

On the lifting cylinder 5a, the LED strip 21a is arranged on the inside and the LED strip 22a is arranged on the outside and thus placed in the illustrated embodiment. Accordingly, on the lifting cylinder 5b in the illustrated embodiment, the LED bar 21b is located on the inside and the LED bar 22b located outside and thus placed.

The LED strips 21a, 21b disposed on the inside of the lifting cylinders 5a, 5b are oriented with a main illumination direction in the longitudinal direction L of the mast 1 onto the load receiving means 4 and thus arranged and placed in the direction of travel on the corresponding lifting cylinder 5a, 5b. In the illustrated embodiment, the LED strips 21a, 21b - as in particular from the FIG. 4 can be seen - arranged slightly inclined to the transverse direction Q.

The externally arranged LED strips 22a, 22b are arranged with a main illumination direction in the transverse direction Q of the mast 1 and thus transversely to the direction of travel to the side outward oriented on the corresponding lifting cylinder 5a, 5b and placed. The LED strip 22a arranged on the left lifting cylinder 5a in this case has the main illumination direction away from the left outer side A1 of the left mast profile 2a of the standing mast 2 designed as an outer mast. The arranged on the right lifting cylinder 5b LED strip 22b in this case has the main illumination direction of the right outer side A2 of the right mast profile 2b of the outer mast formed as a mast 2 away.

The LED strips 21a, 22a are attached to the lifting cylinder 5a and the LED strips 21b, 22b are fastened to the lifting cylinder 5b by a screw connection 30.

For this purpose, the LED strips 21a, 22a or 21b, 22b are fastened to the corresponding lifting cylinder 5a, 5b by means of corresponding holders 31. The holder 31 consist in the illustrated embodiment in each case - as in particular from the FIG. 5 is more apparent - from two half-shifts 31a, 31b, which are placed around the cylinder housing of the corresponding lifting cylinder 5a, 5b and clamped by means of a clamping screw 32 designed as a screw 30 to the corresponding lifting cylinder 5a, 5b. In the half-shells 31a, 31b in each case one of the LED strips 21a, 21b, 22a, 22b attached, for example by a clip connection.

The LED strips 21a, 22a and 21b, 22b are further secured against rotation on the corresponding lifting cylinder 5a, 5b mounted to prevent collisions with liftable and lowerable components of the mast 1. The holders 31 are each provided with at least one stop surface 35, which results in contact with the vertical mast profile 2 a 2 b a secured against rotation attachment of the LED strips 21 a, 22 a and 21 b, 22 b.

The LED strips 21a, 21b arranged on the inside and placed on the inner side of the lifting cylinders 5a, 5b may be monochrome white or alternatively multi-colored, in particular white and / or yellow and / or red.

The externally arranged and externally placed on the lifting cylinders 5a, 5b LED strips 22a, 22b may monochrome white or green or red or yellow or alternatively multi-colored, in particular white and / or red and / or yellow and / or green light.

If the LED strips 21a, 21b, 22a, 22b are multicolored, this can be achieved in a simple manner if the LED strips have corresponding LED strips with a plurality of LED lights for the respective colors.

The LED strips 21a, 21b which are oriented towards the front of the load-receiving means 4 and thus in the direction of travel are preferably work lighting and / or driving lights formed with white light. If the LED strips 21a, 21b can additionally generate yellow light, for example by means of corresponding yellow glowing LED lights or additional yellow-glowing LED stripes, the light situation can be influenced in a simple manner and produces an optimized working light even in fog or bad weather by mixing yellow light with white light.

The side and thus oriented transversely to the direction of travel LED strips 22a, 22b are preferably colored and preferably multi-colored. The laterally oriented LED strips 22a, 22b can be designed as a load status display, wherein the load condition of the industrial truck is indicated by differently colored light of the LED strips 22a, 22b. This makes it possible to display the utilization or condition of the truck in different colors, for example by red, a heavy load, with which only a limited operation of the truck is possible, and / or by green, a load in a weight range without restrictions. Outsiders in the vicinity of the truck can thus be easily identified for possible dangers.

The LED strips 21a, 21b and / or the LED strips 22a, 22b can have a turn signal function and / or a warning vision function, for example by yellow light, which is output in particular flashing.

The laterally oriented LED strips 22a, 22b may additionally or alternatively be designed as a charge capacity indicator of the truck, in particular as a state of charge indicator of a traction battery of a battery-electrically operated truck or as a level indicator of a tank of an internal combustion engine-powered truck. By switching on certain LED lights can be visualized in a simple way, which state of charge the truck has.

The LED strips 21a, 21b and / or the LED strips 22a, 22b may additionally or alternatively be designed as a coming home function. For this purpose, the industrial truck preferably has an electronic control device with a wireless data connection and the electronic control device outputs a signal for switching on the LED strips 21a, 21b and / or the LED strips 22a, 22b via a key or a smartphone app In-operation of the Industrial truck. As a result, a coming home function can be achieved in a simple manner, in which the LED strips 21a, 21b and / or the LED strips 22a, 22b are activated by a key function already when approaching the industrial truck, and thus, for example, the correct industrial truck from several parked trucks in a fleet can be found quickly.

The LED strips 21a, 21b and / or the LED strips 22a, 22b may additionally or alternatively be configured as a maintenance and / or status display of the industrial truck. By turning on or flashing certain LED lights or by visually outputting a particular code, it is easy to display required maintenance or other status messages.

The LED strips 21a, 21b and / or the LED strips 22a, 22b may additionally or alternatively have the function of a cornering light, the LED strips 21a, 21b and / or the LED strips 22a, 22b depending on the steering angle operated and for this purpose arranged on the side facing away from the bend LED strip 21a or 21b and / or LED strip 22a or 22b dimmed depending on the steering angle or off.

The oriented in the direction of travel of the truck LED strips 21a, 21b can additionally or alternatively depending on the direction of travel of the truck are operated with different colors. The internally arranged LED strips 21a, 21 are arranged with the main illumination direction in the longitudinal direction L of the front of the truck arranged mast 1 and thus in the direction of travel of the truck to the load-receiving means 4 oriented on the lifting cylinder 5a, 5b. These LED strips 21a, 21b can generate white light ahead when the truck is moving forward with the load receiving means 4 and generate red light when the truck is reversing. If at the rear of the truck also at least one LED strip is arranged, which generates red light when driving forward the truck and in reverse driving the truck with the rear of the vehicle generates white light, a return light can be generated with low construction costs, in which a forward drive of the truck produces the LED strip on the mast white light and the LED light bar on the rear of the vehicle red light and at a Reversing the truck, the LED strip on the mast red light and the LED light bar on the rear of the vehicle generates white light.

The invention is not limited to the illustrated embodiment. It is understood that only the LED strips 21a, 21b can be arranged on the lifting cylinders 5a, 5b or alternatively only the LED strips 22a, 22b can be arranged on the lifting cylinders 5a, 5b.

Claims (24)

1. Lifting frame (1) of an industrial truck with a vertical mast (2) and at least one raisable and lowerable mast component which is formed by a load pick-up means (4) and/or by at least one extendable mast (3), wherein, for the raising and lowering of the mast component, at least one lifting cylinder (5a; 5b) and at least one traction means (6a; 6b) are provided, wherein the vertical mast (2) has two laterally spaced-apart vertical mast profiles (2a, 2b) and the at least one traction means (6a; 6b) is arranged on a lateral outer side (A1; A2) of the vertical mast profile (2a; 2b), wherein the lifting frame (1) is provided with a lighting device (20), characterized in that the lighting device (20) consists of at least one LED strip (21a; 21b; 22a; 22b) with at least one LED light which is arranged on the lifting cylinder (5a; 5b).
2. Lifting frame according to Claim 1, characterized in that the load pick-up means (4) is arranged on a front side (V) of the vertical mast profile (2a; 2b) and the lifting cylinder (5a; 5b) is arranged on a rear side (R) of the vertical mast profile (2a; 2b), said rear side lying opposite the load pick-up means (4) .
3. Lifting frame according to Claim 1 or 2, characterized in that the at least one LED strip (21a; 21b; 22a; 22b) is arranged in the viewing shadow (S1; S2) between extendable mast (2) and traction means (6a; 6b), said viewing shadow being produced by the lifting frame (1).
4. Lifting frame according to one of Claims 1 to 3, characterized in that an LED strip (21a; 21b) is arranged on the inside of the lifting cylinder (5a; 5b) and/or an LED strip (22a; 22b) is arranged on the outside thereof.
5. Lifting frame according to Claim 4, characterized in that the LED strip (21a; 21b) arranged on the inside is arranged on the lifting cylinder (5a; 5b) in a manner oriented with a main lighting direction onto the load pick-up means (4) in the longitudinal direction (L) of the lifting frame (1).
6. Lifting frame according to Claim 4 or 5, characterized in that the LED strip (22a; 22b) arranged on the outside is arranged on the lifting cylinder (5a; 5b) in a manner oriented with a main lighting direction laterally outwards in the transverse direction (Q) of the lifting frame (1).
7. Lifting frame according to one of Claims 1 to 6, characterized in that the LED strip (21a; 21b; 22a; 22b) is fastened to the lifting cylinder (5a; 5b) by an adhesive connection or by a screw connection (30) .
8. Lifting frame according to Claim 7, characterized in that the LED strip (21a; 21b; 22a; 22b) is fastened to the lifting cylinder (5a; 5b) in a manner secured against rotation.
9. Lifting frame according to one of Claims 1 to 8, characterized in that the LED strip (21a; 21b; 22a; 22b) is fastened to the lifting cylinder (5a; 5b) by means of holders (31).
10. Lifting frame according to Claim 9, characterized in that the holders (31) are provided with in each case at least one stop surface (35), said holders (31) producing a rotationally secured fastening of the LED strip (21a; 21b; 22a; 22b) by contact against the vertical mast profile (a; 2b).
11. Lifting frame according to one of Claims 1 to 10, characterized in that the LED strip (21a; 21b; 22a; 22b) can light up in a single colour.
12. Lifting frame according to one of Claims 1 to 10, characterized in that the LED strip (21a; 21b; 22a; 22b) can light up in different colours, in particular green, red, yellow and white.
13. Lifting frame according to one of Claims 1 to 12, characterized in that the LED strip (21a; 21b; 22a; 22b) is configured as work lighting and/or as driving lighting.
14. Lifting frame according to Claim 12 or 13, characterized in that the LED strip (21a; 21b; 22a; 22b) is configured as a load status display, wherein the load status of the industrial truck is displayed by a differently coloured light of the LED strip (21a; 21b; 22a; 22b).
15. Lifting frame according to one of Claims 1 to 14, characterized in that the LED strip (21a; 21b; 22a; 22b) has a direction indicator function and/or a hazard warning function.
16. Lifting frame according to one of Claims 1 to 15, characterized in that the LED strip (21a; 21b; 22a; 22b) is configured as a charging capacity display of the industrial truck, in particular as a charging status display of a traction battery of an industrial truck operated by electrical battery, or filling level display of a tank of an industrial truck operated by an internal combustion engine.
17. Lifting frame according to one of Claims 1 to 16, characterized in that the LED strip (21a; 21b; 22a; 22b) is configured as a coming-home function.
18. Lifting frame according to one of Claims 1 to 17, characterized in that the LED strip (21a; 21b; 22a; 22b) is configured as a maintenance and/or status display of the industrial truck.
19. Lifting frame according to one of Claims 1 to 18, characterized in that the lifting frame (1) has two laterally spaced-apart lifting cylinders (5a, 5b) on which in each case at least one LED strip (21a; 21b; 22a; 22b) is arranged.
20. Lifting frame according to Claim 19, characterized in that the LED strips (21a; 21b; 22a; 22b) on the two lifting cylinders (5a, 5b) have the function of a cornering light, wherein the LED strips (21a; 21b; 22a; 22b) on the two lifting cylinders (5a, 5b) are operated as a function of a steering angle.
21. Lifting frame according to one of Claims 12 to 20, characterized in that the LED strip (21a; 21b; 22a; 22b) is operated with different colours depending on the direction of travel of the industrial truck.
22. Lifting frame according to one of Claims 4 to 21, characterized in that the LED strip (21a; 21b) arranged on the inside can light up in a single white colour or in multiple colours, in particular red, yellow and white.
23. Lifting frame according to one of Claims 4 to 22, characterized in that the LED strip (22a; 22b) arranged on the outside can light up in a single colour; white, green, red or yellow, or in multiple colours, in particular red, yellow, green and white.
24. Lifting frame according to one of Claims 1 to 23, characterized in that the LED strip (21a; 21b; 22a; 22b) has an integrated cable duct for electric lines and/or for a hydraulic line, or a cable duct for electric lines and/or for a hydraulic line is arranged on the LED strip (21a; 21b; 22a; 22b).

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