Los bordes de seguridad son dispositivos de protección sensibles a la presión que se instalan en las superficies expuestas de los vehículos para detectar el contacto y activar una parada. En los vehículos guiados automáticamente, los robots móviles y determinadas aplicaciones de carretillas elevadoras, proporcionan una última capa de protección contra colisiones de los vehículos industriales cuando los controles de ruta, los dispositivos de advertencia, los escáneres o el criterio humano no logran evitar el contacto.

El contacto lo cambia todo.

Un lidar puede detectar a una persona antes del impacto, una cortina fotoeléctrica puede proteger una abertura fija y un programa informático puede limitar la velocidad de desplazamiento, pero un borde de seguridad reacciona cuando la propia estructura en movimiento se encuentra con un obstáculo y las medidas preventivas previas ya han fallado.

¿Por qué alguien consideraría esa última capa como una tira de goma decorativa?

El riesgo de colisión entre carretillas elevadoras y vehículos guiados automáticamente (AGV) no ha desaparecido

Los almacenes se han automatizado cada vez más. Pero eso no significa que sean inofensivos.

El Consejo Nacional de Seguridad señala que las carretillas elevadoras fueron la causa de 84 muertes relacionadas con el trabajo en 2024 y 25 110 casos de DART durante el periodo 2023-2024, incluidos 15 460 casos que implicaron días de baja laboral. Estas cifras abarcan carretillas elevadoras, carretillas de plataforma motorizadas y recogepedidos. (Datos sobre las lesiones)

La maquinaria es solo una parte del problema. Las carretillas elevadoras y los vehículos guiados automáticamente (AGV) operan en cruces sin visibilidad, entre trabajadores temporales, subcontratistas, palés dañados, embalajes reflectantes, peatones impredecibles y cargas que merman la visibilidad. El software no elimina esas variables.

Un auténtico Informe de accidente de la OSHA del 23 de abril de 2024 describe el caso de un conserje de 40 años que fue atropellado y arrollado por una carretilla elevadora CASE 588H mientras caminaba entre dos edificios. El peatón, el conductor de la carretilla elevadora y la empresa anfitriona pertenecían a regímenes laborales diferentes, lo que constituye un caso paradigmático de fallo en el control del tráfico por parte de varios empleadores. (Administración de Seguridad y Salud en el Trabajo)

¿Habría evitado esa muerte un bordillo sensible a la presión? Nadie puede afirmarlo con certeza tras leer únicamente el informe. La velocidad del vehículo, la geometría del impacto, la distancia de frenado, la posición del bordillo y el atrapamiento del cuerpo serían factores determinantes.

Esa es la cruda realidad. Un borde de seguridad no puede contrarrestar las leyes de la física.

La OSHA advierte expresamente de que las carretillas elevadoras que circulan marcha atrás pueden atropellar o aplastar a los peatones, y recomienda garantizar una visibilidad clara, mirar en la dirección de la marcha, dejar un espacio suficiente para los peatones, utilizar dispositivos de señalización, espejos, observadores y otros medios que faciliten la visibilidad. Asimismo, advierte a los empresarios que no den por sentado que los peatones pueden oír la alarma de marcha atrás. (Administración de Seguridad y Salud en el Trabajo)

Por lo tanto, los bordes de seguridad de las carretillas elevadoras deben formar parte de una estrategia de control por niveles, y no servir de complemento a un sistema de gestión del tráfico que no funciona.

¿Qué hacen realmente los bordes de seguridad sensibles a la presión?

Un borde de seguridad sensible a la presión suele estar compuesto por un perfil deformable, un elemento sensor interno, accesorios de montaje, conexiones eléctricas y un circuito de evaluación relacionado con la seguridad.

Cuando se aplica una presión suficiente que comprime el perfil activo:

1. El elemento sensor cambia de estado eléctrico.
2. El controlador detecta ese cambio.
3. El sistema de control de seguridad corta o regula la potencia de accionamiento.
4. El sistema de frenado del vehículo detiene el movimiento.
5. La lógica de reinicio y reinicio determina cuándo puede reanudarse el movimiento.

El borde en sí mismo no detiene el vehículo. Solicita que se detenga.

Esa distinción suele quedar oculta en los folletos de los productos, pero es la que determina si la instalación constituye una verdadera medida de seguridad o un simple elemento decorativo caro. La función de seguridad completa incluye el borde, el cableado, la detección de fallos, el controlador, los dispositivos de salida, el sistema de accionamiento, los frenos, el estado del software, el comportamiento de reinicio y el rendimiento de la parada mecánica.

La activación es solo el principio

Durante una frenada por contacto eficaz se producen tres fenómenos físicos:

• Accionamiento: El perfil se comprime lo suficiente como para generar una señal de seguridad.
• Respuesta de control: El controlador y el variador reaccionan ante esa señal.
• Recorrido excesivo: El borde sigue comprimiéndose mientras el vehículo desacelera.

El sobrerecorrido no es caucho desperdiciado. Es la deformación restante disponible tras la activación.

Cuando un perfil se activa rápidamente pero alcanza su límite inferior antes de que el vehículo se detenga, la fuerza sigue aumentando sobre la persona, el bastidor, el chasis de la máquina o la carga. Un catálogo puede anunciar un tiempo de respuesta rápido y, aun así, dar lugar a una aplicación insegura cuando la distancia de frenado es mayor que la distancia de compresión útil.

Una comprobación técnica simplificada consiste en:

Movimiento total de frenado = distancia recorrida durante la respuesta del sensor y del sistema de control + distancia de frenado mecánica

Ese cálculo debe basarse en las peores condiciones de funcionamiento plausibles, y no en la prueba de aceptación en fábrica con las condiciones más favorables. El estado de la batería, la carga útil, la pendiente del suelo, el estado de los neumáticos, el desgaste de los frenos, la dirección de giro, la temperatura y la velocidad máxima permitida pueden influir en el resultado.

La geometría de montaje determina qué se detecta

Los bordes de seguridad de los vehículos guiados automáticamente (AGV) suelen instalarse a lo largo de:

• El borde delantero
• Superficies de desplazamiento traseras
• Esquinas laterales
• Estructuras de horquillas o portacargas
• Mecanismos de tijera o de elevación
• Low chassis areas associated with foot and ankle hazards
• Transfer interfaces where trapping can occur

But a long edge does not guarantee complete coverage.

Brackets, corner joints, end caps, recessed profiles, exposed bolts, fork openings, and chassis projections can create inactive zones. A person may contact the metal structure before reaching the sensing surface. Or a narrow object may enter below, above, or beside the active profile.

My blunt view is simple: if the risk assessment does not identify the first probable point of contact, the mounting drawing is guesswork.

For broader mobile-automation projects, the site’s AGV and AMR safety case studies provide useful context on dynamic fields, warehouse movement, and mixed safeguarding arrangements. (Título del sitio)

Safety Edges, LiDAR, Light Curtains, and Bumpers Are Not Interchangeable

Buyers often compare these devices as though they were competing versions of the same sensor. They are not.

Protective measure	Método de detección	Main strength	Main limitation	Typical application
Pressure-sensitive safety edge	Physical compression	Detects contact directly at a protected edge	Acts only after contact begins	Low-speed AGV edges, pinch points, moving guards
Pressure-sensitive bumper	Compression of a larger deformable surface	Covers broader or irregular contact areas	Requires sufficient deformation and validated stopping travel	AGV front bumpers, mobile platforms, larger collision surfaces
Safety-rated LiDAR or laser scanner	Non-contact protective field	Detects people before contact and supports configurable zones	Performance depends on correct field design, installation, environment, and safety integration	AGVs, AMRs, robot cells, warehouse routes
Obstacle-avoidance LiDAR	Non-contact object detection	Supports navigation and collision avoidance	Navigation performance does not automatically prove functional-safety capability	Route planning, positioning, object detection
Cortina óptica de seguridad	Interruption of an optical plane	Fast access detection across a fixed opening	Normally better suited to fixed zones than vehicle-mounted collision contact	Conveyor transfers, gates, cells, loading interfaces
Physical segregation	Fence, rail, wall, bollard, or separated route	Prevents vehicle–pedestrian interaction	Requires space and disciplined layout management	Pedestrian aisles, crossings, fixed vehicle routes

A safety-rated scanner should detect a person before collision. An edge handles residual contact risk.

That is why the most defensible AGV designs use both. A scanner can establish warning and protective fields that change with speed or steering direction, while the safety edge covers close-range contact that the non-contact system did not prevent.

The website’s safety LiDAR range for AGV and warehouse applications includes products for configurable mobile detection fields. Its listed OSSD models should be distinguished from navigation-oriented devices, because a general NPN or PNP obstacle output is not, by itself, evidence that a complete safety function meets the required performance level. (Título del sitio)

For example, this 270° obstacle-avoidance LiDAR for AGV navigation lists a 0.05–8 m range at 10% reflectivity, detection up to 25 m at greater than 90% reflectivity, 0.25° or 0.33° angular resolution, a 15 Hz scan rate, IP65 housing, DC 9–28 V supply, and a 905 nm Class 1 laser. Those are meaningful detection specifications, but engineers must still determine whether the selected model and integration are suitable for a safety-related stop. (Título del sitio)

At fixed conveyor entrances or transfer interfaces, industrial safety light curtains may protect an access plane more effectively than a contact edge. For machinery with several exposed entry directions, protección de acceso por varios lados may also be more appropriate. The device must follow the hazard, not the buyer’s preferred product category. (Título del sitio)

AGV Safety Edges and Forklift Safety Edges Require Different Thinking

AGVs and manually operated forklifts share warehouse space, but their safety architectures are not identical.

AGV and AMR Applications

An AGV controller determines motion automatically. That makes the safety edge part of a designed safety function involving predictable speed states, drive commands, scanner fields, braking logic, and vehicle operating modes.

Typical engineering questions include:

• Does edge activation trigger a safe stop or only a normal software stop?
• Is the circuit monitored for open circuits, short circuits, and bypassing?
• Does the vehicle remain stopped while the edge is compressed?
• Can the AGV restart toward the trapped person?
• Is reverse movement controlled after contact?
• Are separate edges monitored independently?
• What happens during manual, maintenance, recovery, and teach modes?
• Has stopping distance been measured at full load and maximum permitted speed?

The applicable risk review should also examine charging stations, lifts, docking operations, conveyors, pallet-transfer points, automatic doors, trailers, and areas where vehicle geometry changes during lifting or turning.

Conventional Forklift Applications

Forklift safety edges require more caution because a retrofit can affect visibility, clearance, stability, electrical systems, operating behavior, or the vehicle’s approved construction.

En OSHA 29 CFR 1910.178(a)(4), a customer or user must not make modifications or additions affecting capacity or safe operation without the manufacturer’s prior written approval. Relevant capacity, operating, and maintenance markings must also be updated. (Administración de Seguridad y Salud en el Trabajo)

So no, fastening a generic pressure strip onto the rear counterweight is not automatically a compliant forklift upgrade.

The proposed installation should be reviewed by the forklift manufacturer, a qualified integration team, and the employer’s safety function owner. Electrical compatibility, attachment strength, environmental exposure, driver behavior, inspection requirements, failure indication, and the effect on the truck’s approved condition all require documentation.

And operator training still applies. OSHA requires powered industrial truck operators to receive formal instruction, practical training, workplace evaluation, and periodic evaluation, with workplace topics including pedestrian traffic, narrow aisles, load stability, and surface conditions. (Administración de Seguridad y Salud en el Trabajo)

Standards Expose the Weakest Product Claims

The relevant safety-edge standard is ISO 13856-2:2013, which covers general design and testing principles for pressure-sensitive edges and pressure-sensitive bars used as safeguards. ISO states that the edition was reviewed and confirmed in 2024. (ISO)

But read the scope carefully.

ISO explicitly says the document does not determine whether a particular edge is suitable for a specific application, does not choose the necessary performance level for the full safety-related control system, and does not configure the sensing area for the designer.

In plain English: a standards claim on a component does not approve your vehicle.

Pressure-sensitive bumpers, plates, wires, and similar devices are addressed separately under ISO 13856-3:2013. The difference matters when an AGV uses a broad deformable bumper rather than a narrow edge profile. (ISO)

Driverless industrial trucks are covered by ISO 3691-4:2023. The standard applies to AGVs, AMRs, automated carts, tunnel tuggers, under-carts, and other powered trucks designed to operate automatically. ISO currently lists the 2023 edition as published while a replacement draft, ISO/DIS 3691-4, is under development. (ISO)

That last detail matters to OEMs planning a platform expected to remain in production for several years. Designing only to an old checklist can create expensive redesign work once customer specifications or regional conformity expectations change.

What the Accident Record Says About Layered Protection

One of the best ways to understand a safeguard is to study incidents it could not have solved alone.

A NIOSH-supported Oregon FACE investigation examined the 2020 death of a forklift operator who was struck by a pallet of soft-drink cans weighing about 2,000 pounds. The pallet fell from approximately 20 feet after adjoining pallets were removed. The report also noted that the operator was working roughly 70 hours per week across two jobs. (疾病控制与预防中心)

No safety edge could have corrected the warehouse inventory error, unstable pallet arrangement, falling-load hazard, or fatigue exposure involved in that case.

This is exactly why I reject the “install another sensor” mentality. Safety engineering must address the hazard source.

Safety edges are valuable for controlled low-speed contact and trapping scenarios. They are not a treatment for unstable loads, excessive speed, poor rack design, blind pedestrian routes, inadequate training, bypassed scanners, or defective brakes.

How to Select the Best Safety Edges for AGVs

Do not begin with profile length or price.

Begin with the contact event.

Define the Hazard

Document:

• The person or body part at risk
• The moving vehicle surface
• The probable direction of approach
• Maximum and minimum contact height
• Pinch, crush, shear, impact, or trapping mechanism
• Vehicle speed at the contact point
• Maximum payload and operating gradient
• Possibility of continued or secondary movement
• Escape and rescue conditions

Demand Application Data

A serious supplier or integrator should be able to discuss:

• Active sensing length
• Inactive end zones
• Actuation force and test method
• Tiempo de respuesta
• Usable overtravel after switching
• Maximum permissible deformation
• Recovery behavior
• Bending radius
• Mechanical life
• Cable and connector arrangement
• Water, dust, oil, coolant, and cleaning exposure
• Operating temperature
• Fault-monitoring method
• Safety controller compatibility
• Applicable standards and available test documentation

“Industrial grade” is not a specification.

Validate the Complete Stop

Test the vehicle under the worst intended conditions:

• Full rated payload
• Highest permitted speed
• Cold and warm brake conditions
• New and worn tires
• Low and high battery state
• Straight travel and turning
• Forward and reverse movement
• Floor transitions and permitted slopes
• Each safety edge section
• Each operating mode
• Relevant single-fault conditions

Measure stopping distance repeatedly. Record it. Compare it with available edge compression and permissible contact-force limits established by the risk assessment.

A device that has not been validated against measured stopping movement is not yet a safeguard. It is an untested assumption.

Preguntas frecuentes

¿Qué son los bordes de seguridad para vehículos guiados automáticamente (AGV)?

AGV safety edges are pressure-sensitive protective devices mounted on exposed moving surfaces to detect contact with a person or object and trigger a safety-related stop, helping limit trapping or crushing force when non-contact detection, route controls, or software logic fail to prevent the encounter.

They are commonly used on front, rear, side, fork, lift, and transfer structures. Their effectiveness depends on active coverage, activation force, overtravel, stopping distance, controller architecture, mounting geometry, and fault monitoring.

¿Cómo contribuyen los bordes de seguridad a mejorar la seguridad de las carretillas elevadoras y los vehículos guiados automáticamente (AGV)?

Safety edges improve forklift and AGV safety by turning physical contact at a protected edge into a stop command, adding a last-line engineering control for low-speed impact, pinching, or trapping events; however, they do not replace pedestrian segregation, operator training, safety scanners, speed control, or verified braking performance.

For AGVs, the edge can be integrated into the safety-related motion controller. For conventional forklifts, any retrofit affecting safe operation should receive the vehicle manufacturer’s prior written approval and be validated as part of the employer’s wider traffic-management program.

¿Son los bordes de seguridad sensibles a la presión mejores que el LiDAR de seguridad?

Pressure-sensitive safety edges are not better than safety LiDAR; they perform a different job, because LiDAR can detect a person before contact while an edge reacts only after compression, so a well-designed AGV normally uses layered controls rather than choosing one device as a universal substitute for the other.

LiDAR protects distance. Safety edges protect the remaining contact boundary. Physical segregation, controlled crossings, warning systems, speed management, and verified brakes complete the system.

¿Cuáles son los mejores bordes de seguridad para los vehículos guiados automáticamente (AGV)?

The best safety edges for AGVs are devices whose sensing length, activation force, overtravel, environmental resistance, fault monitoring, output architecture, and mounting geometry have been validated against the vehicle’s maximum speed, measured stopping distance, load condition, target safety performance, and foreseeable contact points.

The best product is therefore application-specific. A short travel profile may work on a slow cart but fail on a heavily loaded vehicle with longer braking movement. Selection should follow a documented risk assessment and full-system stop test.

Put the Safety Function on Paper Before It Goes on the Vehicle

Do not buy AGV safety edges from a photograph and a voltage rating.

Prepare the vehicle drawing, edge locations, maximum speed, payload, stopping-distance data, controller interface, environmental conditions, operating modes, and required safety performance. Then compare pressure-sensitive edges with safety LiDAR solutions, fixed access protection, and physical route segregation.

For a project-specific review, send those details through the machine safety project contact page. Ask for an integration proposal that identifies active coverage, output architecture, environmental protection, controller compatibility, and validation requirements—not merely a product quotation.