EP0821131B1 - Safety closing mechanism for a roller door - Google Patents

Abstract

The device is fitted in an end bar (4) or in an end section of the door and works in conjunction with a drive, which on release it stays standstill or reversed for a short time. The door end bar or end section, has a locking insert (10) with a vertically movable locking strip (11). At least one switch (14) is provided to the insert and its input and output is transferred via connecting lines (14.1,14.2). The switch inputs and outputs may be connected via contact strips provided in the lateral guide profiles (6) with the drive control as a monitoring circuit. Two switches may be provided, connected in series, each near the side ends of the lower end profile or the end section.

Description

The invention relates to a locking device for a roller door, the Locking device is inserted in the end bar or the closing section and interacts with a drive that stops or at least stops when triggered is reversed for a short time, at which the end rod (4) or the closing section of the roller shutter with a safety insert (10) vertically movable fuse strip (11) having one or several switches (14) provided to interact with the drive control Monitoring circuit is interconnected.

Roller shutters provided with locking devices are known; this prevents that the gate closes if the gate area is not yet clear is when there are still vehicles or people in the area of the closing gate. When the locking device is triggered, therefore the drive is stopped or even reversed, so that the roller shutter turns lifts a certain distance or up to its upper stop and so one Danger to the thing or the person is excluded. In the simplest case, the bottom of the Roller shutter limit switches are provided, which when placed on an obstacle Switch off the drive. These limit switches can only be used in areas close to the edge monitor the roller door so that the center of the door remains unprotected. Next are the trailing cables, which are the limit switches with the drive control connect, endangered as they can be torn off what the locking device decommissioning. To include the center of the gate, too known to provide the lower end of the roller door with a sensor tube, which is completed and its internal pressure by means of a pressure switch can be monitored. If the sensor tube is at least with one Part of an obstacle remaining in the gate area, the internal pressure rises in the sensor hose; this pressure increase is via drag hoses transferred to a pressure switch that detects this pressure rise, and which then switches off the drive. Besides the problems of uncertainty the drag hoses are the difficulties of this type of Locking device in that the internal pressure of the sensor hose from the Outside temperature depends, and that the sensor hose freeze to the ground and can tear off when lifting, which leads to ineffectiveness and destruction of the Locking device leads.

From a brochure from the GAROG company for automatic geared motors mbH is a switch insert for the end bar or the final section of the roller shutter known in which one or more Switches are provided. The end rod or The final section also has an obstacle that can be pressed in when it hits it Fuse link, which is provided with the switch or switches, the monitoring circuit interacting with the drive control is / are interconnected. The transmission to the drive takes place using a trailing cable.

From DE-U-93 01 259 is a trailing cable-free locking device for a roller door previously known, in which one of the side guide rails an elastomer hose with a safety edge is provided. The there are two contact strips in this elastomer tube arranged that a conclusion of both strips through side. Push in the elastomer tube using a transverse one Slider is done. This lateral pushing in of the slide is done by Pins triggered in the final bar or the final section of the roller shutter protruding downwards and arranged over inclined planes interact with the transverse slide so that when it hits the pins are pushed into an obstacle and the transverse slide is moved laterally. This sideways shift causes the contact by a short between the two contact strips. The security triggering depends on whether the mechanics are in the range of End rod or end section of the roller shutter is dirty or not, and whether the abutment of the transverse slide the forces to elastic Deformation of the contact tube is able to apply.

This is where the invention, which is based on the task, begins To further develop the locking device so that it covers the entire gate area, that they are used safely and economically and inexpensively is manufacturable and attachable.

This object is achieved by the characteristics set out in the main claim solved; advantageous developments and preferred embodiments describe the subclaims.

The end bar or the end section of the roller shutter points vertically movable insert with at least one sensor switch. This vertically movable insert is in a downward open chamber of the end rod or the final section and about the entire door width. He will hit one in the gate area still existing obstacle raised and actuates the switch also housed in the chamber. The inputs and outputs the switch is led out to the side; thereby the Acceptance of the switching status (switch closed - switch open) via conductor tracks provided in the lateral guide profiles, the as a monitoring circuit with the drive control are connected. The switches can be parallel or in Series. When connected in parallel, the switches are in Rest open; a switch is triggered when the insert is raised, the monitoring circuit is closed. It is advantageous a series connection is provided for several switches; here are the switches closed at rest; when activating a switch the monitoring circuit is opened. Even with a leaning Press in the one that interacts with at least one switch The monitoring circuit is used when the lower edge of the gate opened with its use on an obstacle.

One of the sensor switches close to the side are advantageous Arranged ends of the lower end profile or the final section. Especially with very wide gates, it is advantageous if additional at least one further sensor switch is provided, which is in the middle of the Final profile or the final section or at regular intervals from the ends of the bottom end profile or the end section and is preferably also arranged from one another. This Arrangements are also made for those gate widths where Deflection of the insert is not excluded, make sure that Obstacles are noticed and the door operator is switched off safely.

The inputs and outputs on the side of the sensor switch are designed as resilient, laterally projecting contact pins. With these contact pins the circuit, which is the switching state reveals, led out of the gate area, so that the Connection points in the side guides can be relocated. These are in the side Guide profiles provided conductor tracks advantageous from a insulated conductor track formed in the depth of the guide profile is arranged. These longitudinal tracks will be advantageous on plastic strips used in the guide profiles applied so that the contact pins cover the entire gate path be in electrical contact with the assigned conductor track. Thereby can also the gate operator, whose control with this monitoring circuit cooperates, can be controlled.

Both the resilient contact pins and the longitudinal ones Conductor tracks made of a low-abrasion and corrosion-resistant Material, preferably made of stainless steel. With this On the one hand, training is a safe contact worn, and secondly the fact that such roller shutters are common be moved and still have to maintain their safety function. In order to reduce the friction, it is further advantageous if the Contact tip of the contact pins as a spherical cap or inserted Trackball is formed. With this training, the one with the Friction necessary associated wear largely suppressed.

To secure the position and to properly guide the spring-loaded Contact pins are stored in plastic cages and guided. These plastic cages are designed so that they are form-fitting into a chamber of the lower end rod or the final section the roller shutter can be used; this training serves on the one hand the safe function of the contact pins, and on the other it allows others to rationally manufacture the end bar or the final section.

Fig. 01:

Untere Rolltorkante, Front-Ansicht (teilgeschnitten);

Fig. 02:

Einzelheit der Schließsicherung - Explosions-Darstel lung.

The invention is explained in more detail using the exemplary embodiment of a roller shutter shown in FIGS. 1 and 2; show

Fig. 01:

Lower roller door edge, front view (partially cut);

Fig. 02:

Detail of the locking device - exploded view.

Figure 1 shows the situation at the bottom of a partially cut Shutters shown with the roller shutter curtain 1, which consists of a number of rods 2 (only one shown here) which are connected via connecting hooks 3 are joined together, is formed. Figure 2 shows enlarged a (partially cut) situation of a lower corner of a roller shutter tank 1 with safety strip 11, which in the downward open Chamber 5 is inserted. The number of bars in a roller shutter curtain 1 depends on the gate height to be bridged; the rods are at Opening in the usual way coiled on a shaft and at Closing from this again. The lowest of the bars, the End rod 4 is constructed in such a way that it connects to the following of rods 2 is appended; however, it points downwards towards the bottom Chamber 5 in which a fuse link 10 is inserted. The Roller shutter curtain 1 slides in side guides 6, which as Multi-chamber profiles formed, a sliding chamber open to the roller door 1 7 have.

In an analogous way, this also applies to sectional doors where the Sections not rolled up, but flat in a horizontal picture be pulled or pushed. Here is the last one too of the sections with a chamber open at the bottom, which in similarly receives the fuse link 10. The sections are also guided by side guides in the vertical part, which have a sliding chamber.

The fuse link 10 is essentially vertical movable fuse strip 11 formed, which in the downward open Chamber 5 is immersed, and also formed as a multi-chamber profile is. Its lower edge has a molded-on receiving profile 12 for a (hose) seal (not shown) while the switches in an upwardly open chamber of this fuse strip 11 14 are used so that their plunger when pushing up the fuse strip 11 against the inner chamber wall of the downward open Chamber 5 are pressed and so switch 14 switch. The one another Switches 14 connected in series are with the connecting lines 14.1 and 14.2 led outwards and stand with the side Contact pins 17 in connection. This arrangement is secured in the downwardly open chamber 5 by end inserts 15 which close this chamber 5 laterally, and with the limiting inserts 18 can be fixed.

These contact pins 17 are mounted in the end inserts 15, which do so are provided with holes 16 as contact pin guides. To the To press contact pins 17 outwards, contact springs 17.1 are provided, which are supported at one end on the end insert 15 while push the contact pin 17 outwards with its other end. These outwardly pressed contact pins 17 find their abutment one in the multi-chamber profile of the lateral guide profile 6 as Contact strips used plastic strips 8, the self Insulated with a contact track (not shown) is. These contact paths of the plastic strips 8 are over the Connection lines 9.1 and 9.2 with the control (not closer shown) of the drive (also not shown) motors connected, so that when the switching state changes Control switches off the drive motor or - at least for a short time Time - reverses so that the roller door when hitting an obstacle stopped or raised by a predetermined distance becomes. The switching state of the switch 14 is on the lines 14.1 and 14.2 issued and from the as contact strips in the side guide profiles 6 used plastic strips 8 with their contact paths. With these switches 14 a Circuit open when these switches 14 in series are switched; vice versa also with a parallel connection this switch 14 a circuit can be closed.

Claims (6)

1. Security lock for a doorway shutter, said security lock being inserted in the final bar or the final section thereof and interacting with a drive which upon activation is arrested or, at least for a short time, reversed, wherein the final bar (4) or the final section of the doorway shutter has a security insert (4) including a vertically movable securing rail (11) which is provided with one or several switches (14) and connected to form a monitoring circuit interacting with the drive control, characterized in that a contact strip is provided in each of the lateral guide profile sections (6), which contact strips are connected, via the switches (14) located in the final bar (4) or the final section of the doorway shutter, with the monitoring circuit, the inputs and outputs of the switch(es) (14) being provided via connection leads (14.1, 14.2) with laterally protruding contact pins (17).
2. Security lock as claimed in Claim 1, characterized in that the contact pins (17) are provided with springs (17.1) and are supported and guided in plastic cages provided as end pieces (15), which plastic cages are inserted in the bottom final bar (4) or the bottom final section of the doorway shutter (1), and in that the contact strips are formed in the lateral guide profile sections (6) by plastic strips (8) longitudinally inserted into the guide profile sections (6) and provided with a longitudinally extending conductor.
3. Security lock as claimed in Claim 2, characterized in that the end piece (15) is adapted for insertion into a compartment of the bottom final bar (4) in such a way that it can be positively received therein.
4. Security lock as claimed in any one of Claims 1 to 3, characterized in that both the spring-loaded contact pins (17) and the longitudinally extending conductors of the inserted plastic strips (8) are made from a low-friction anticorrosive material, preferably stainless steel.
5. Security lock as claimed in Claim 4, characterized in that the contact point of the contact pins (17) is formed as a univeral ball joint or an inserted rolling ball.
6. Security lock as claimed in Claim 4 or 5, characterized in that the spring-loaded contact pins (17) and/or the longitudinally extending conductors are made from stainless steel.

Images