SAFETY SYSTEM FOR SAFEGUARDING A MOVING, GUIDED MOTION ELEMENT AGAINST UNWANTED COLLISIONS

• US 20100325959A1
• Filed: 07/15/2010
• Published: 12/30/2010
• Est. Priority Date: 01/16/2008
• Status: Active Grant

• Current Assignee: Cedes AG (Assa Abloy AB)
• Original Assignee: Cedes AG (Assa Abloy AB)
• Inventors: Hug, René, Signer, Christian, Menzi, Markus, DE COI, Beat
• Granted Patent: US 8,309,904 B2
• Time in Patent Office: Days
• US Class Current: 49/25
• CPC Class Codes: E05F 15/43 responsive to disruption of energy beams, e.g. light or sound
• CPC Class Codes: E05F 15/74 using photoelectric cells
• CPC Class Codes: E05F 2015/436 the beam being parallel to the wing edge
• CPC Class Codes: E05Y 2800/21 of identical elements, e.g. of identical compression springs
• CPC Class Codes: E05Y 2800/242 arranged in parallel relationship
• CPC Class Codes: E05Y 2900/00 Application of doors, windows, wings or fittings thereof
• CPC Class Codes: E05Y 2900/106 for garages
• CPC Class Codes: E06B 2009/6836 sensing obstacle
• CPC Class Codes: E06B 9/88 for limiting unrolling

Abstract

A safety system for safeguarding a moving, guided motion element against unwanted collisions with an object located on a motion path in the direction of motion of the motion element is proposed, which safety system comprises an object-detection device for detecting an object in an area of the motion element. The object-detection device can be blocked with respect to object detection by a motion of the motion element, and has an electronic unit with which the motion of the motion element can be controlled and which is configured to assign a blocked state to the object-detection device when the motion element approaches, in which blocked state an object or motion element does not trigger a safety mode, wherein shut-off mechanism are provided which, when a shut-off signal coming from the motion element is detected, transfer at least part of the object-detection device into the blocked state.

Claims

1. A safety system for safeguarding a moving, guided motion element against unwanted collisions with an object located on a motion path in the direction of motion of the motion element, said safety system comprising (i) an object-detection device for detecting an object in an area of the motion element, which object-detection device can be blocked with respect to object detection by a motion of the motion element, (ii) an electronic unit with which the motion of the motion element can be controlled and which is configured to assign a blocked state to the object-detection device when the motion element approaches, in which blocked state an object or motion element does not trigger a safety mode, and (iii) a shut-off mechanism which, when a shut-off signal coming from the motion element is detected, transfers at least part of the object-detection device into the blocked state, wherein the shut-off mechanism comprises a transmitting element for a shut-off signal which is either seated directly on the motion element or is tuned to an optical reflector for electromagnetic radiation on the motion element in such a way that a signal of the transmitting element can be received by a receiver of the shut-off mechanism only in a predefined motion area of the reflector on the motion element.

2. The system as claimed in claim 1, wherein the safety system is a door/gate/door safety system.

3. The system as claimed in claim 1, wherein the object-detection device comprises a curtain composed of a multiplicity of object detectors which are arranged successively in the direction of motion of the motion element.

4. The system as claimed in claim 1, wherein the shut-off mechanism is configured to evaluate a shut-off signal as such only if said shut-off signal comes from the motion element in a predefined time section during the motion of the motion element.

5. The system as claimed in claim 1, wherein the shut-off signal is a signal on the basis of at least one of light, sound, electromagnetic radiation and a magnetic field.

6. The system as claimed in claim 1, wherein the shut-off mechanism comprises one of a transmitter and a receiver which forms, together with one of a receiver and transmitter of the object-detection device, respectively, the shut-off mechanism in the region of a guide bar of the motion element.

7. The system as claimed in claim 1, wherein the object-detection device comprises photoelectric barriers.

8. The system as claimed in claim 1, wherein the shut-off mechanism is configured to detect an end position of the motion element.

9. The system as claimed in claim 8, wherein the end position is a completely closed state of the motion element.

10. The system as claimed in claim 3, wherein the object detectors are arranged non-equidistantly in the direction of motion of the motion element.