Movable or removable closures – Plural wings radiate from common pivot; i.e. – revolving – Successive position-type; e.g. – turnstile
Patent
1998-10-13
2000-05-23
Redman, Jerry
Movable or removable closures
Plural wings radiate from common pivot; i.e., revolving
Successive position-type; e.g., turnstile
E06B 1108
Patent
active
060652462
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to tripod turnstiles, and in particular to a device for driving the revolving tripod of a two-way turnstile.
2. Description of the Related Art
It is known that tripod turnstiles are used in various situations for monitoring the flowing of people through passages, e.g. for the access to subway stations. The operating sequence may be that of allowing the tripod to revolve only upon an unlocking command, typically through the obliteration of a ticket, or the opposite one of a freely revolving tripod which is blocked upon command. If the flow control can be performed in both directions of passage, you have a two-way turnstile.
In prior art turnstiles the combination of the bidirectionality with the alternative locking or unlocking sequences leads to quite complicated and sophisticated devices. This implies a high manufacturing cost, as well as a greater risk of failures or malfunctionings.
SUMMARY OF THE INVENTION
Therefore the object of the present invention is to provide a device for driving the revolving tripod of a two-way turnstile which allows the above-mentioned different operating sequences while being structurally simple.
This object is achieved by means of a device having the characteristics disclosed in claim 1.
A first advantage of the present driving device, stemming from its structural simplicity, is the lower manufacturing cost combined with a higher resistance and reliability.
A second advantage of this device is given by its capability in taking up the play and returning to the starting position whenever an unauthorized walking-through is attempted or an authorized walking-through is not completed.
These and other advantages and characteristics of the device according to the present invention will be clear to those skilled in the art from the following detailed description of an embodiment thereof, with reference to the annexed drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a schematic front view of the present device in the locked position according to a first operating sequence;
FIG. 2 is a view similar to the preceding one with the device unlocked to allow an authorized walking-through;
FIG. 3 is a view similar to the preceding one with the device at the beginning of the rotation;
FIG. 4 is a view similar to the preceding one with the device at the middle of the rotation;
FIG. 5 is a view similar to the preceding one with the device at the end of the rotation.
DESCRIPTION OF THE PREFERRED EMBODIMENT
Referring to FIG. 1, there is seen that the device according to the present invention essentially includes a wheel 1, having a particular profile, keyed onto a central shaft 2 together with a cam 3 and the tripod (not shown), as well as a positioning mechanism engaging cam 3 and two specular mechanisms for locking wheel 1 located at symmetrical positions with respect thereto, said three mechanisms being secured onto a supporting plate 4.
The positioning mechanism includes a return spring 5 and a follower 6, which is substantially L-shaped and carries a roller 7 at the end of the longer arm so as to follow the profile of cam 3. The spring 5 is secured at one end to plate 4 and at the other end to the shorter arm of follower 6, which is fixed onto plate 4 through a pin 8 located at the corner between its two arms.
Each of the two specular mechanisms for locking wheel 1 includes a lever (9, 9') connected at one end to a rod (10, 10') passing through an electromagnet (11, 11'), a biasing spring (12, 12') being arranged on said rod. The electromagnets 11, 11' and the levers 9, 9' are secured onto plate 4, each lever being substantially L-shaped and fixed through a pin (13, 13') located at the corner between its two arms, similarly to follower 6.
The wheel 1 is substantially shaped as an equilateral triangle with convex sides, having a peripheral profile characterized by a series of teeth and steps with straight flanks. These teeth and steps have the same width but different heights, the height being m
REFERENCES:
patent: 2504535 (1950-04-01), Kilpatrick
patent: 3397486 (1968-08-01), Foxwell et al.
patent: 3978613 (1976-09-01), Hayward et al.
patent: 5072543 (1991-12-01), Tetherton
patent: 5146711 (1992-09-01), Gallenschutz et al.
Italdis Industria S.p.A.
Redman Jerry
LandOfFree
Device for driving the revolving tripod of a two-way turnstile does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Device for driving the revolving tripod of a two-way turnstile, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Device for driving the revolving tripod of a two-way turnstile will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1828352