The present invention relates generally to traffic signs, and more particularly to traffic signs that can be automatically deployed, e.g. from a moving vehicle, and can be deployed without assembly of the traffic sign at the desired display location.
Of major importance today, due to our society's dependence upon motorized transportation, is the continuing construction, repair, and maintenance of freeways, highways, and roads. Involved in all such construction, repair, and maintenance are traffic signs for placement on the roadside ahead of the job site, where motorists can be warned of the presence of road construction equipment, personnel, or hazardous conditions as they approach the work site. To provide motorists with such notification or warning, it is necessary that one or more traffic signs be displayed along the roadside, such signs being located well in advance of the road construction or repair project. One type of traffic sign that is commonly placed along the roadside is the so-called and art-recognized roll-up sign. Examples of prior art roll-up signs are described, for instance, in U.S. Pat. No. 4,019,271 (Laminer), U.S. Pat. No. 4,548,379 (Marketing Displays, Inc.), U.S. Pat. No. 4,694,601 (Dicke Tool Co.), and U.S. Pat. No. 5,732,911 (TrafFix Devices, Inc.). These prior art roll-up signs typically comprise a support stand, such as a one-piece base or a plurality of supporting legs coupled to a frame, and a reflective and flexible sign, which is attached to the frame.
A typical process for placing prior art roll-up traffic safety signs is to deliver a disassembled roll-up sign and support stand to a desired location along a roadside. A worker will then assemble the roll-up sign system and correctly place the sign so that it is properly displayed to passing motorists. Although attempts have been made to simplify this assembly process, most notably in U.S. Pat. No. 5,732,911, manual labor is still required to assemble and place these signs, and the process necessarily places workers at risk, since they must perform this process in close proximity to passing traffic. Accordingly, it would be desirable to develop a roll-up sign which can be automatically deployed without the need of roadside assembly, and preferably from a moving vehicle.
The present invention comprises a self-deploying traffic sign and methods and apparatus for automatically delivering and placing these self-deploying signs on the roadside, resulting in a faster and safer delivery and placement process.
In one aspect of the invention, there is provided a self-deployable traffic sign system, which comprises a receptacle mountable to a vehicle, a support base, preferably made of rubber, and a reusable foldable sign pivotably mounted to the support base. The sign is pivotable to a spring-loaded storage position adjacent to said base and in the storage position is of a sufficiently small configuration to be disposed within said receptacle. Preferably, the support base comprises an upper surface in which is disposed a recess which is sized to receive the foldable sign therein when the sign is in a folded configuration and when the sign is pivoted to its storage position.
In a preferred embodiment, the receptacle is mounted to a hitch disposed on the vehicle.
More particularly, the foldable sign comprises a foldable sign panel, preferably made of a flexible material, disposed on a foldable sign frame which is pivotably mounted to the support base. The foldable sign frame comprises flexible arms on which the foldable sign panel is mounted. The sign frame further comprises an upright sign post for supporting the flexible arms, as well as a bottom portion, preferably triangular, which is relatively broad in configuration.
A resilient mechanism, preferably a spring or springs, is provided on the support base, for deploying the spring upwardly upon release of the sign from the receptacle, and for also stabilizing the sign when it is deployed in high-wind conditions.
Means is provided for remotely releasing the sign and support base from the receptacle in order to deploy the sign, which means are discussed in detail below. In certain embodiments, the receptacle is pivotable in order to release and deploy the sign. The receptacle may be adapted to contain only a single sign, or, alternatively a plurality of signs.
In another aspect of the invention, there is provided a reusable, foldable traffic safety sign system adapted for being dispensed from a receptacle attached to a vehicle. The sign system comprises a support base, a foldable sign frame pivotably mounted to the support base, and a foldable sign mounted on the sign frame. The sign frame is pivotable to a spring-loaded storage position adjacent to the base and in the storage position is of a sufficiently small configuration to be disposed within the receptacle.
The invention, together with additional features and advantages thereof, may best be understood by reference to the following description taken in conjunction with the accompanying illustrative drawing.
Referring now more particularly to the drawings, there is shown in
In
In operation, when it is desired to store and/or transport the sign 220, it may be pivoted downwardly by pivoting bottom portion 222 so that the sign 220 and associated frame 224 are entirely disposed within the recess area 212. The sign 220 may be retained within the recess area 212, against the applied force created by the springs 230, either by means of a retaining latch (not shown), or by tucking an edge of the sign 220 underneath a ledge (not shown) disposed along an edge of the recess area 212. When it is desired to release the sign 220 to its deployed position, as shown in
In addition to the foregoing benefit of the springs 230, the springs also preferably function to offset movements of the sign caused by such effects as the wind and passing traffic, thus assisting in keeping the sign in a functional orientation. Moreover, in the case of direct and/or high impact perturbations, such as would be the case if an approaching vehicle 310 (
Support base 210 provides ballast for the sign 220, and preferably has sufficient weight to provide stable support to the traffic sign when deployed, and to meet all highway regulation requirements for their desired application. The weight of the support base should also be sufficient to facilitate the release of the traffic sign from the 120 (
In the illustrated embodiment, bottom portion 222 is configured as a triangle, and is preferably sized to permit its surface to accommodate a traffic sign or notice to motorists. In reality, however, it is within the scope of the invention to fabricate the bottom portion 222 of any desired shape, and could be made of any suitable material, although rubber (particularly recycled rubber) is preferred. The bottom portion 222 could also be alternatively fabricated of any suitable pivotable connection, well known in the art.
Sign 220 is a large flexible panel, typically made of fabric or plastic, and accommodating a warning message or symbol preferably conforming to federal or state regulatory requirements. It may accommodate either rolling up, or folding along predetermined crease lines, in order to expedite storage of same under certain circumstances. The folding lines, if supplied, would help to prevent damage to retroreflective material on the display portion of the sign. Referring now to
As is obvious from the drawings, the fully deployed sign 220 is too large to fit within the recess area 212 in the support base 210, for storage purposes. Therefore, the frame 340 is designed to be foldable to a size such that the flexible arms 410A, 410B, and 410C will fit inside the recess area 212. Folding of the frame is achieved by having each of the flexible arms 410A, 410B, 410C be capable of being independently folded about points 410A-P, 410B-P, and 410C-P, toward the center 420 of the frame. This folding process is shown in
Without posing any limitation to the invention, an efficient way to reduce the size of the sign and frame is to have the folding points for each flexible arm located at between length L and ½ L, measured from the center 420, where length L is the length of the flexible arm. When folding the flexible arms as shown in
The sign post 224 and the flexible arm parts may be made of any material which has sufficient strength so that it does not irreversibly deform or break during the use of the traffic sign, storing process, deployment process, and/or perturbations. Suitable materials, for instance, may include metal, fiberglass, graphite, carbon, plastics, combinations of the foregoing materials, or other suitable materials known to those skilled in the art. Note that member 410C-2 may be an extension of sign post 224, or could be integral thereto.
The flexible parts may be fabricated of a rubber bar, a spring mechanism, or any other suitable material which meets functional requirements. The spring or stiffness characteristics of materials suitable for the flexible parts 440A, 440B, 440C must meet the following requirements: a) the neutral or original spring position of the flexible part 440A, 440B, 440C is when the combinations of arm parts 410A-1 and 410A-2, 410B-1 and 410B-2, and 410C-1 and 410C-2 are in an extended position as shown in
In
In
Referring again to
It is noted that even though a sedan is illustrated as the vehicle in this application, any type of vehicle, including trucks and the like as well as various types of cars, may be utilized. The receptacle is preferably positioned near the end of the vehicle and behind the rear wheels, and either beneath the vehicle (710, 730, 740) or behind the vehicle (720). The receptacle may be permanently attached to the vehicle, but is preferably removably attached, such as by a hitch or the like (
The hitch embodiment mentioned above is illustrated in
The release of the traffic sign from its receptacle may be accomplished in a variety of ways as shown in some exemplary embodiments in
In case the receptacle is an open system with trays, such as receptacle 1010 shown in
The different operations of the receptacle and release of the stored traffic sign is preferably accomplished in an automatic fashion via a controller controlling the different portions of the inventive system, as already described above. For example, the controller may control: a) the retraction or deployment of the legs underneath the receptacle, b) the movement or positioning of the receptacle, c) the desired traffic sign to be released in case of multiple traffic signs being stored therein, d) the door mechanism in case the receptacle is a closed system, e) the latch holding the traffic sign, and/or f) the spring-release, hydraulic system, or conveyor-belt-like mechanism that assists in releasing the traffic sign from the receptacle.
The controller may include a control device which may be in close proximity to the receptacle or integrated with the receptacle. However, the present invention is not limited to the position of the control device relative to the receptacle as long as the control device can be controlled or operated by a user. However, having control device 1110 in close proximity to the driver of a vehicle 1120, as shown in
If desired, the control system may be configured to automatically control the timing of subsequent traffic signs once a “start” signal has been provided. For instance, one or more sensors that could provide distance information to the controller could be used to sense the distance traveled by the vehicle and the, based on the distance traveled, control the next release. In one embodiment, this could occur using the cruise control of the vehicle. In an example of such a more sophisticated controller, the controller only triggers the start of the release of the first traffic sign, and the subsequent release of other traffic signs follows automatically, with the signs (or any other traffic safety equipment being dispensed) being released and placed at a preferred distance from one another. The distance can, for example, be programmed or preset in the controller, since it can be easily gathered or calculated by the controller, given the feedback or sensory information over the distance, time, and/or speed that the vehicle has traveled. Another example is that the controller could include one or more schedules to schedule the release and delivery that may either be programmed or entered for a particular event through a user interface, graphical user interface or touch panel. In other words, a user may either manually control the release(s), or may control an automatic release schedule, whereby the automatic release schedule includes a small control program using sensory or feedback information as input and control signals to control means as output. The present invention may also include sensors that check or verify whether a traffic sign is actually released or placed correctly. Examples of such sensors are, for instance, different types of optical sensors or pressure sensors.
It should be noted that the present invention may be used in combination with a safety cone delivery device, which automatically releases flexible safety cone(s) from its receptacle to a road surface, as described in co-pending U.S. patent application Ser. No. 10/194,709, filed on Jul. 12, 2002 by the same inventor as in the present application, which application is herein expressly incorporated by reference. The two different devices, i.e. the cone dispenser 1310 and the sign dispenser 1320 as shown in
Another variation may be to include a spring, spring mechanism, or telescopic-spring mechanism 1510 (
Advantages of the present invention include:
a) storage of an assembled traffic sign in a spring-loaded and compact manner in a receptacle;
b) delivery of the assembled and spring-loaded traffic sign to a desired location along a roadside by a moving vehicle;
c) automatic placement and deployment of the assembled traffic sign to a functional traffic sign from the moving vehicle; and
d) control of delivery and placement of a traffic sign by a person from a moving vehicle.
Accordingly, although an exemplary embodiment of the invention has been shown and described, it is to be understood that all the terms used herein are descriptive rather than limiting, and that many changes, modifications, and substitutions may be made by one having ordinary skill in the art without departing from the spirit and scope of the invention.
This application claims the benefit under 35 U.S.C. 119(e) of the filing date of Provisional U.S. Application Ser. No. 60/538,445, entitled Deployable Traffic Sign, and filed on Jan. 21, 2004, which application is expressly incorporated herein by reference.
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