Hinge/Link

Hinge/Link Switch

Wherever cam operated Limit Switches might be used, a Unimax Hinge or Link Actuated Switch will provide a neater and more reliable solution. The Hinge switch is for safeguarding personnel against hazards contained within a perimeter fence, but may also be used at loading stations.

The Link-Switch is for safeguarding hinged panels and loading stations or can be fitted inside equipment. These types of switch do not secure the guard, so they are not suitable for use with removable covers.

GW Hinge Actuation

Basic elements

1. A tamper-resistant enclosure permanently fixed to the inside of the machine, or at the guard of the hazardous area.

2. A specially-developed, positive action switch secured to the body of the actuator.

Click here for dimensional drawings.

GW8

The switches and shaft are mounted on a flexible platform inside the enclosure for installations where the guard hinge may not be properly aligned with the fixing surface. This model is not sealed where the shaft enters the Polycarbonate or metal enclosure.

GW81

The selected fail-safe switches are actuated by a stainless steel shaft which is bored and cross-drilled ready for mounting to an extended hinge pin. It can be rotated through 360 degrees and adjusted to switch within 2 degrees of movement either way. The whole is sealed to IP65 Standard to prevent ingress of water, oil, or dust irrespective of mounting postion. This model is always supplied with a die-cast aluminium enclosure.

 

GW9

Supplied complete with plated steel short link arm size and door bracket available in a Polycarbonate or Metal enclosure. The crankshaft has a patented vernier adjustment which ensures that switching can occur within 1 deegree of movement. The guard can be operated fast and frequently, for example at a machine loading station. The GW91 is similar to the GW9 but supplied with a long link arm size.

Ordering Process

See the table below for a guide to the order reference codes, consisting of three parts, one for the actuator, one for the switch circuit and one for the enclosure, along with some example order codes.

                                                               

ACTUATOR

SHAFT FLEXIBLE MOUNTED UNSEALED

GW8

 

 

BORED SHAFT RIGID FULLY SEALED

GW81

 

 

SHORT LINK ARM

GW9

 

 

LONG LINK ARM

GW91

 

 

SWITCH CIRCUIT

SINGLE POLE

 

11

 

DOUBLE POLE

 

21

 

CHANGEOVER

 

22

 

THREE POLE

 

31

 

DOUBLE POLE + INDICATOR

 

32

 

CHANGEOVER + INDICATOR

 

33

 

ENCLOSURE

POLYCARBONATE MOULDED STANDARD

 

 

P

METAL DIE-CAST

 

 

M

GW8 MUST HAVE A “P” OR “M” ENCLOSURE
FOR GW9 & 91 ENCLOSURE IS OPTIONAL
GW81 MUST HAVE "M" ENCLOSURE

Ordering Examples

GW822P                UNSEALED SHAFT. CHANGEOVER FAIL SAFE SWITCH. POLYCARBONATE ENCLOSURE.

GW911                  SHORT LINK ARM. ACTUATED SINGLE POLE FAIL SAFE SWITCH. NOT ENCLOSED.

  For Switch options use the Fail Safe Switch Link at bottom of page to select your required switching action.