CZ27789U1 - Variable display for displaying traffic signs or advertisements - Google Patents

Description

Variable display devices for displaying traffic signs or advertisements

Technical field

The technical solution relates to a variable display device for displaying traffic signs or advertisements. The variable display device for displaying traffic signs or advertisements comprises a support box in which the front wall is reciprocably pivoted parallel to each other parallel to each other with outwardly visible side prisms, preferably with three side prisms, representing a variable active display surface. The rack is equipped with a control unit and a power supply system.

BACKGROUND OF THE INVENTION

EP 1 596 352 B1 of Dambach-Werke GmbH, DE discloses a variable display device for multi-prismed traffic signs which rotates by means of a single motor and drive shaft so as to allow the display of a plurality of traffic signs, the device being equipped with a reset device which returns the prisms to a predetermined position by a mechanical energy storage device in the event of a power failure, by coupling the drive shaft, the sprocket and the roller chain, which is connected to the lever means. Prisms usually have three faces. The drive shaft and the worms transfer the movement to the prism shaft via the worm gear.

The advantage of the device is a reset device which restores the prisms to a predetermined position in the event of a power failure.

A disadvantage of this solution is that in the event of a power failure, the prisms return to a predetermined one position, so that in the event of a power failure an undesirable traffic sign or symbol may be set.

The essence of the technical solution

The nature of the variable display device according to the present invention, with the technical features of the preamble of claim 1, is characterized in that each prism has one end portion thereof connected to an associated worm gear; all worm gear units are supported by their worms on a single reciprocating rotary drive shaft; only one worm gear coupled to the respective one prism of the variable display device is provided with one sensor for sensing the position of all prisms; a prism position sensing sensor is electrically coupled via the control unit to one electric motor to control the variable display device; an electric motor allowing rotation of the side faces of the prisms in a matter of seconds, e.g. within three seconds, is electrically coupled to a power supply control unit for processing input messages or voltage signals from the control center to control the position of all prisms of the display device.

The main advantage of this technical solution is the overall design of the variable display device, which is easy to manufacture, service and maintain while ensuring safe operation, while its individual components are affordable and inexpensive. The rotation of all prisms is controlled by one electric motor and one common drive shaft. On one worm gear unit coupled to only one prism, there is an absolute sensor for sensing the position of all prisms. A common electric motor is controlled via the control unit via an absolute encoder.

Preferably, the sensor for sensing the position of all prisms is an absolute sensor. In the event of power failures after the device is restarted, the absolute sensor informs the control unit of the prisms position without the need to control the prisms in a controlled manner.

For a trouble-free and proven placement of the prisms, it is advantageous for each prism to be housed at its ends in housings, of which one housing is rigidly connected to the support housing, and one housing of each prism is connected to one associated worm gear.

-1 CZ 27789 U1

One of the housings may be provided with a spring to secure the prism in the axial direction. The opposite sleeve is supported by a bearing on the pin which is part of the carrying case, which ensures easy and reliable fixing of the prism in the whole device.

The optimum location of the absolute prism sensor is on the worm gear 5 of the electric motor.

Preferred designs are worm gears comprising a worm and a worm wheel, which are coupled via a spur gear drive of a driven drive shaft via a spur gear drive to an electric motor.

It is preferred that the electric motor has a DC power supply because the wiring of the device may be weak current. It is easier to back up the power supply and to use the power from the solar cells.

For easy coupling, the absolute prism sensor is connected to the worm gear unit via a screw coupling via a fastening tm.

In addition, it is preferred that the electric motor is attached to a bracket to which the fork 15 is also attached, and the drive shaft of the drive shaft is mounted to the fork and the driven wheel is coupled to the drive wheel of the electric motor.

In order to translate the movement of the prism coupled to the absolute sensor, it is preferable that the mounting tm for attaching the absolute sensor to the worm gear is located on a straight coupling which is slid on the driven shaft mounted in bearings located in the base of the worm gear.

The axial displacement of the drive shaft is effectively prevented by at least one yoke threaded on the drive shaft.

When a locking ring is placed on the driven shaft, it is easy to remove and reinstall the prism in case of prism replacement or repair. A compression spring threaded on the locking ring ensures its position in the locking position.

A preferred design is the connection of the clutch to the worm wheel by means of a resilient pin, and then the worm wheel forms a worm gear with a worm which is housed in sliding bushes and placed in the worm cage.

For adjusting the play of the worm housed in the sliding bushes pressed in the worm cage, it is advantageous if the worm cage is provided with a spacer.

The screw cage may be provided with guide pins which align the screw with the drive shaft. The screw cage may also be provided with an adjusting screw for adjusting the axial distance of the screw and the worm wheel.

The variable display device can be equipped with a backup power supply to ensure its uninterrupted operation in the event of a power failure.

Clarification of drawings

The solution is further described in detail by way of example embodiments and is further elucidated in the attached schematic drawings, showing:

Fig. 1 is an axonometric view of a housing of a variable display device with a prism-active surface; Fig. 2 is an axonometric view of Fig. 1 the rear side of the housing; Fig. 3 is a front view of the housing of Fig. 1; Fig. 3, Fig. 5 detail B of Fig. 4, Fig. 6 detail C of Fig. 4, Fig. 7 an axonometric view of the driving device of the display device,

Fig. 8 is an axonometric detail view of Fig. 7 of a worm gearbox with a mounting mandrel for connecting an absolute sensor; Fig. 9 is a side view of the worm gearbox of Fig. 8 from the D direction; 7 to a worm gear unit without mounting darkness for the connection of an absolute sensor, FIG. 11 is an axonometric detail view of the electric motor of FIG. 7, FIG. 12 a side view of the electric motor of FIG. Fig. 14 is an axonometric view of the prism with the upper shell, Fig. 15 is an axonometric view of the prism with the separated upper shell, Fig. 16 is an axonometric view of the prism with the lower shell and the bearing, and Fig. 17 and bearing.

Examples of technical solutions

The variable display device 1 for displaying traffic signs or advertisements is shown schematically in an axonometric view in FIG. 1 in a front view and in FIG. 2 in a rear view. The variable display device 1 has a support box 2, made in an exemplary embodiment of aluminum alloy sheets or stainless steel sheets or aluminum profiles. In the support box 2, prisms 3 are arranged from the front side, vertically arranged in parallel, and represent an active variable display surface of a traffic sign or advertisement. Prisms 3 are made of drawn aluminum profiles. In an exemplary embodiment, each prism 3 is made of one aluminum profile of triangular cross-section. Each prism 3 is externally a triangular prism and a variable display surface or motif is located on its outer prisms. On the rear wall of the exemplary display device 1, there are two cabinets, one of which houses the control unit 4 with the power supply of the prisms drive 3, and the other housing a power backup 4a. The display device 1 in the front view of FIG. 3 has, in a specific exemplary embodiment, 11 prisms 3, for example 1500 mm long. The number of prisms 3 and their length depends on the needs and purpose of the display device 1 and the requirements of the customer. Each prism 3 has an upper part connected to one associated worm gearbox 6, as shown in Fig. 7. The worm gearbox 6 has its own special construction, intended solely for the purpose of the present invention.

Fig. 3 shows a vertical section A of the sixth prism 3 of the display device 1. The section A of the display device I is shown in Fig. 4. The upper part B of this section A is shown in detail in Fig. 5 and the lower part C in Fig. 6. In the exemplary embodiment of the display device 1 shown in FIGS. 3, 4, 5 and 6, i.e., only one prism 3, the sixth prism 3 is connected to the prism sensor 8, the prism 3 is connected via the upper housing 5. The worm gear 6, to which the sixth prism 3 is connected, is connected by a screw coupling 7 to a position sensing sensor via a mounting tm 11 for connecting this sensor to the worm gear.

6. In this embodiment, an absolute encoder 8, such as the manufacturer Megatron Electronic GmbH Co., has been selected by the position sensor. KG, DE. The absolute sensor 8 has a high reliability and a long service life. The absolute sensor 8 for sensing the position of the prisms 3 is housed in a protective cover

9.

Fig. 7 shows an axonometric view of the driving mechanism of the display device I. Each prism 3 is connected to the worm gear 6 via its upper housing 5. The worm gear 6 comprises a worm 12. A common drive shaft 13 extends through all the worms 12. 13 is connected via a spur gear 14 to a spur gear 15 of a driving electric motor 16.

In the exemplary embodiment, the drive shaft 13 is provided with one yoke 17 preventing its axial displacement. The drive shaft 13 may be provided with multiple yokes 17 as required.

-3GB 27789 U1

FIG. 7 shows, in an exemplary embodiment, a sixth prism 3 connected to an absolute sensor 8 for sensing its position. In an exemplary embodiment, one absolute number 8 is coupled to one electric motor 16 via the control unit 4.

If a higher power output of the display device 1 is needed, a plurality of electric motors 16 may be used, each electric motor 16 being coupled to one associated absolute sensor 8. In this case, of course, the drive mechanism is divided into individual units, each comprising its own a drive shaft 13 with respective drive and driven wheels 14, 15 and an electric motor 16 coupled with its own associated absolute sensor 8. The arrangement of the prism drive mechanism 3 of the display device 1 may have other arrangements.

In the case of a vertical arrangement of the prisms 3, the drive device of the prisms 3 can also be mounted in the lower part of the support box 2. In the case of horizontally arranged prisms 3, the drive device can be mounted in the side part of the support box 2.

Fig. 8 shows an axonometric detailed view of Fig. 7 of the worm gear 6 with a mounting mandrel H for the connection of the absolute sensor 8. The mounting t1 for the connection of the absolute sensor 8 is located on the upper side of the coupling 18 which is connected to the driven shaft. The driven shaft 19 is mounted in a pair of bearings 20, 21, an upper bearing 20 and a lower bearing 21. The bearings 20, 21 are located in the base 22 of the worm gear 6.

In the lower part of the driven shaft 19 there is a locking ring 23 for securing the upper sleeve 5 of the prism 3 on the driven shaft 19 of the worm gear 6. The locking ring 23 is threaded with a compression spring 24 to secure the locking ring 23 in the locking position on the driven shaft 19. 24 is supported in the upper part on the base 22 of the worm gear 6. The worm 12 is provided with a square hole for the drive shaft 13.

The worm gear 6 with the mounting mandrel 11 for the connection of the absolute sensor 8 is shown in FIG. 8 in FIG. 9. In this illustration, the arrangement of the clutch 18 is better seen. The clutch 18 is slid onto the upper part of the driven shaft 19. The worm wheel 25 is connected to the clutch 18 by a resilient pin 26. The worm wheel 25 forms a gear with the worm 12 mounted in the sliding bushes 27. The worm 12 is placed in the cage 28 of the worm 12 by means of the sliding bushes 27. The screw cage 28 is provided with a spacer 29 for adjusting the axial play of the screw 12 in the cage 28. The screw cage 28 is located on the support plate 30. The cage 28 is provided with two guide pins 31 and an adjusting screw 32. The cage 28 is with the support plate 30 firmly connected by screw connection 33.

Fig. 10 shows a worm gear 6 which is absolutely structurally identical to the worm gear 6 shown in the previous Figures 8, 9, except that the clutch 18 does not include a mounting tm H for the connection of the absolute sensor 8. Thus, this type of worm The gearbox 6 is used for all prisms 3 which are not coupled to the absolute sensor 8, as shown, for example, in FIG. 7.

The electric motor 16 of FIG. 7 is shown in detail in FIG. 11 in an axonometric view. Giant. 12 shows a side view from direction E of the electric motor 16 of FIG. 11. The electric motor 16 is attached to the bracket 34. A fork 35 is attached to the bracket 34. The bracket 34 and the forks 35 can be integrally connected or formed in one piece. A spur gear 14 of the driven drive shaft 13 is mounted to the fork 35 on the sliding bushes 27. The spur gear 14 is coupled to the drive wheel 15 of the electric motor 16.

Each prism 3 is supported by the upper casing 5 and the lower casing W in the support structure 2. The views of any prism 3 with the upper casing 5 and the lower casing 10 are schematically shown in Fig. 13. Axonometric views of the prism 3 with the upper casing 5 are shown 14, 15, and a prism 3 with a lower housing 10 in FIGS. 16, 17. FIGS. 14 to 17 show a cross section of an prism 3 in the shape of an equilateral triangle.

FIG. 14 shows the upper part of the prism 3 with the upper housing 5 pressed.

-4GB 27789 U1

In more detail, FIG. 15 shows the upper part of the prism 3 with the upper casing 5 in an exploded state. The upper casing 5 is provided with a spring 36 for securing the prism 3 in the axial direction.

FIG. 16 shows the lower part of the prism 3 with the lower sleeve 10 pressed in.

In more detail, FIG. 17 shows the lower part of the prism 3 with the lower housing 10 in an exploded state. The lower sleeve 10 is provided with a bearing 37 and a pin 38. The lower sleeve 10 of the prism 3 is supported via a bearing 37 on a pin 38 which is part of the support box 2.

The display device I operates as follows:

The variable display device I (FIGS. 1, 2, 3) with reversible rotating prisms 3 according to this technical solution is, for example, a traffic sign which is used for traffic control. The traffic sign allows you to respond to current traffic, driveability and weather changes. By means of the display device 1 it is possible, for example, to stop traffic in front of road tunnels and to divert it to an alternative route. Each of the side walls of the triangular prisms 3 of the variable display device 1 shows one of the three possible required traffic information or traffic signs, eg changing the desired speed, changing the maximum permitted speed, no entry, changing the direction of travel, etc.

The control unit 4 (FIGS. 2, 4) of the display device 1 processes input messages or voltage signals from a remote (not shown) control center. If necessary, the control unit 4 confirms the displacement of the display device I by a message sent to the remote control center. At the same time, the control unit 4 senses the position of the prism 3 by means of an absolute encoder 8 with an analog or digital output signal. The absolute sensor 8 is resistant to atmospheric moisture and water and can additionally be protected by a cover 9 (Figs. 4, 5, 7). The absolute sensor 8 converts the angular movement of the prism 3 into a voltage output or data output, and these outputs are routed to the control unit 4. The control unit 4 converts the information shown by the prisms 3 to a variable active display surface of the display device I by an electric motor 16. it does not have to be powered only from the mains, but can be powered from the solar panel using batteries or backed up by batteries.

The bracket 34 secures the attachment of the electric motor to the support housing 2. The fork 35 attached to the bracket 34 secures the position of the spur gear 14 driven to the drive shaft 13.

When using a DC electric motor 16, no other transfer means such as, for example, a transformer or converter is required. In this case, an input voltage of, for example, 12 V is used. For example, an electric motor 16 is used, with respect to the power supply, with outputs of 50 to 300 W depending on the size of the prism field.

The electric motor 16 used has a speed which allows the side faces of the prisms 3 to be rotated within 3 seconds. If the speed is too high, there is a risk of overloading the support box 2 and the mechanical transmission elements. At low revolutions, the rotation of the side faces of the prisms 3 would not satisfy the requirement to rotate the side walls of the prisms 3 in a matter of seconds. It is also possible to use other types of electric motors 16 with different input voltages, e.g. 24 V, by utilizing voltage adjusting means.

The prisms 3 are rotated to the desired state by means of an electric motor 16, which transmits the torque to the worm gearboxes 6 via the spur gears 13 through a square section drive shaft 13 (FIGS. 7, 8, 10, 11). Thus, the torque of the electric motor 16 is transmitted by the spur gear 14 driven by the spur gear 15 and the spur gear 15 by the drive spur gear to the drive shaft 13; in this case, the worm 12 of the worm gearbox 6 transmits the torque from the drive shaft 13 to the worm wheel 25.

Worm gearboxes 6, one of which is connected to an absolute sensor 8 for sensing the position of all prisms 3, rotate the prisms 3 to one of three possible positions by 120 ° (Figs. 7, 14-17). Secure mounting of the absolute encoder 8 is ensured by the fixing Π. on the upper side of the clutch 18 connected to the driven shaft 19 of the worm gear 6 (FIGS. 8, 9). The clutch 18 provides a mechanical connection between the driven shaft 19 and the worm wheel 25. The worm 12 forming

The gear 12 with the worm gear 25 rotates in the sliding bushes 27. The worm 12 is placed by means of the sliding bushes 27 into the cage 28 which determines the position of the worm 12 relative to the worm wheel 25. The cage 28 of the worm 12 is provided with a spacer 29 which locks The cage 28 is provided with two guide pins 31 securing the perpendicularity of the axis of the screw 12 relative to the prism plane 3 and an adjusting screw 32 ensuring the axial distance of the screw 12 and the worm wheel 25. The cage 28 is firmly connected to the support plate 30. a screw connection 33, thereby forming a rigid unit.

The driven shaft 19 is mounted in a pair of bearings 20, 21, an upper bearing 20 and a lower bearing 21 of the base 22 of the worm gear 6.

The locking ring 23 in the lower part of the driven shaft 19 secures the upper sleeve 5 of the prism 3 on the driven shaft 19 of the worm gear 6 against falling out. The compression spring 24, supported on the locking ring 23 and supported in the upper part, rests against the base 22 of the worm gear 6, securing the locking ring 23 on the driven shaft 19, preventing its displacement and thereby releasing the prism 3 from the driven shaft 19. provided with a square hole for a square drive shaft 13 that is easy to manufacture.

The prisms 3 forming the active imaging surface are, together with one end thereof, mounted on the pin 38 via the bearing 37 of the lower housing 10 into the support housing 2, thereby fixing them in the support housing 2. Worm gear 6, where the locking ring 23 secures it from falling out of the driven shaft 19. A compression spring 24, slipped on the locking ring 23, secures the locking ring 23 against unintentional unlocking from the locking position on the driven shaft 19 (Figs. 8-10, 13). -17).

Each vertically oriented triangular prism 3 is supported by the upper casing 5 and the lower casing 10 in a support structure 2 allowing rotation of the prism 3. The upper casing 5 with the spring 36 secures the prism 3 position in the axial direction and in addition rotates the prism 3. provided with a bearing 37 enabling the pivot 38 to rotatably support the prism 3 in the support box 2.

Industrial applicability

The present technical solution is particularly useful for traffic signs, advertising and wherever large signs with variable information are used.

Claims (5)

PROTECTION REQUIREMENTS Variable display device for displaying traffic signs or advertisements, comprising a support box (2), in the front wall of which parallel prisms (3) arranged in parallel to each other with outwardly visible side prisms, preferably with three side prisms, representing the variable active display surface and the support box (2) is provided with a control unit (4) and a power supply system, characterized in that: a) each prism (3) has one end part connected to an associated worm gear (6), b) all worm gear units (6) are supported by their worms (12) on one common reciprocating rotary drive shaft (13), c) only one worm gear unit (6) coupled to one prism (3) of the variable display device (1) is provided with one sensor for sensing the position of all prisms (3), D) the prism sensor (3) is electrically connected via a control unit (4) to one electric motor (16) for controlling the variable display device (1), e) the electric motor (16) for rotating the side surfaces of the prisms (3) in a matter of seconds is electrically connected to the control unit (4) with power for processing input signals or voltage signals from the control center for controlling the position of all prisms (3) a display device (1). Variable display device according to claim 1, characterized in that the sensor for sensing the position of all prisms (3) is an absolute sensor (8). Variable display device according to claim 1, characterized in that each prism (3) is mounted at its ends in housings (5, 10), of which one housing (5, 10) is fixedly connected to the support box (2). , and one sleeve (5, 10) of each prism (3) is connected to one associated worm gear (6). Variable display device according to claim 3, characterized in that one of the housings (5, 10) is provided with a spring (36) for securing the prism (3) in the axial direction, and the opposite housing (5, 10) is over the bearing (5). 37) mounted on a pin (38) which is part of the support housing (2). Variable display device according to claim 1, characterized in that a sensor for sensing the position of the prisms (3) with analogue or digital output is located on the worm gear (6). Variable display device according to claim 1, characterized in that the sensor for sensing the position of the prisms (3) is connected to the worm gear (6) via a screw coupling (7) via a fastening tm (11). Variable display device according to claim 1, characterized in that the worm gears (6) comprising the worm (12) and the worm wheel (25) are connected via a spur gear (14) of the driven drive shaft (13) via a spur gear (15) driving with electric motor (16). The variable display device of claim 1, wherein the electric motor (16) is a DC motor. Variable display device according to claim 1, characterized in that the electric motor (16) is attached to a bracket (34) to which the fork (35) is also attached, the fork (35) being mounted on the sliding bushes (27). the driven wheel (14) of the drive shaft (13) and the driven wheel (14) are coupled to the drive wheel (15) of the electric motor (16). Variable display device according to claim 6, characterized in that the fastening tm (11) for the connection of the absolute sensor (8) to the worm gear (6) is located on a straight coupling (18) which is slid on the driven shaft (19). mounted in bearings (20, 21) which are located in the base (22) of the worm gear (6). Variable display device according to claim 1, characterized in that the common drive shaft (13) is provided with at least one yoke (17) preventing its axial displacement. Variable display device according to claim 1, characterized in that the driven shaft (19) is provided with a locking ring (23) on which the compression spring (24) is threaded. Variable display device according to claim 10, characterized in that the clutch (18) is connected by a flexible pin (26) to the worm gear (25), and the worm gear (25) forms a worm gear with the worm (12) which is mounted in sliding bushes (27) and placed in the cage (28) of the screw (12). -7GB 27789 U1 Variable display device according to claim 13, characterized in that (28) the screw (12) is provided with a spacer (29). Variable display device according to claim 13, characterized in that (28) the screw (12) is provided with guide pins (31) and an adjusting screw (32). Variable display device according to claim 1, characterized in that the variable display device (1) is provided with a backup power supply (4a).