ISO 13856-3:2013 機械の安全性—感圧保護装置—パート3：感圧バンパー、プレート、ワイヤー、および同様の装置の設計とテストの一般原則 | ページ 6

3.1

pressure-sensitive protective device

sensitive protective equipment of the"mechanically activated trip" type intended to detect the touch of a person or body part of a person and which can also act as impeding device

Note 1 to entry: A pressure-sensitive protective device consists of a sensor or sensors, which generates a signal when pressure is applied to part of its outer surface, and a control unit, which responds to the signal from the sensor and generates an output signal(s) to the control system of a machine.

Note 2 to entry: Pressure-sensitive protective devices can be used as tripping devices as well as presence-sensing devices, as mentioned in ISO 12100:2010, Note to 3.28.5. For presence-sensing devices, see also 4.2.6.2.

Note 3 to entry: For the definitions of sensitive protective equipment and impeding device, see ISO 12100:2010, 3.28.5 and 3.29, respectively.

3.1.1

pressure-sensitive bumper

pressure-sensitive protective device (3.1) with a sensor (3.3) or sensors whose characteristics are a cross-section throughout the pressure-sensitive area that can be regular or irregular, a cross-section width usually greater than 80 mm, and an effective sensing surface (3.10) that is deformed locally or that can move as a whole

3.1.2

pressure-sensitive plate

pressure-sensitive protective device (3.1) with a sensor (3.3) or sensors whose characteristics are an effective sensing surface (3.10) that is normally — but not necessarily — flat, an effective sensing surface width usually greater than 80 mm, and an effective sensing surface that moves as a whole

Note 1 to entry: See Figure C.5.

3.1.3

pressure-sensitive wire

pressure-sensitive protective device (3.1) with a sensor (3.3) or sensors whose characteristics are a wire, cord, rope or cable held in tension, and where a change in the tension is detected to give an output signal

3.2

presence-sensing device

PSD

sensitive protective equipment that creates a sensing field, area or plane for detecting the presence of a body part or the whole of a person

Note 1 to entry: Pressure-sensitive protective devices can be used as tripping devices as well as presence-sensing devices, as mentioned in ISO 12100:2010, Note to 3.28.5.

Note 2 to entry: See also 4.2.6.2.

3.3

sensor

part of the pressure-sensitive protective device (3.1) which generates a signal in response to sufficient pressure applied to part of its surface

Note 1 to entry: This definition together with that of control unit (3.4) covers the functional components of a pressure-sensitive protective device. These functions can be integrated into a single assembly or contained in any number of separate assemblies. See Figure 1.

3.4

control unit

part of the pressure-sensitive protective device (3.1) which responds to the condition of the sensor (3.3) and generates output signals to the machine control system

Note 1 to entry: This definition together with that of sensor (3.3) covers the functional components of a pressure-sensitive protective device. These functions can be integrated into a single assembly or contained in any number of separate assemblies. See Figure 1.

3.5

output signal switching device

part of the control unit (3.4) of a pressure-sensitive protective device (3.1) which is connected to the machine control system and transmits output signals

3.6

ON state

state in which the output circuit(s) of an output signal switching device (3.5) is complete and permits the flow of current or fluid

3.7

OFF state

state in which the output circuit(s) of an output signal switching device (3.5) is broken and interrupts the flow of current or fluid

3.8

actuating force

any force applied to the sensor (3.3) which causes the output signal switching device (3.5) to go to the OFF state (3.7)

3.9

approach speed

relative speed at which contact is made between the surface of the sensor (3.3) and a part of the body

3.10

effective sensing surface

part of the surface of the sensor (3.3) or a combination of sensors, as stated by the manufacturer ここで, the application of an actuating force (3.8) creates an OFF state (3.7) in the output signal switching device (3.5)

3.11

effective sensing direction(s)

direction(s) of the actuating force (3.8) from which the sensor (3.3) will be actuated

3.12

dead surface

part of the surface area of the sensor (3.3) outside the effective sensing surface (3.10)

3.13

actuating travel

distance travelled by a specified object, moving in the direction of the applied actuating force (3.8) , and measured from the point at which this object touches the effective sensing surface (3.10) to the point at which the output signal switching device (3.5) changes to an OFF state (3.7) under specified conditions

Note 1 to entry: See Figure 2.

Note 2 to entry: Actuating travel can differ from pre-travel, a term relating to a pressure-sensitive edge or pressure-sensitive bar (see ISO 13856‑2) and signifying travel in the direction normal to the reference axis; actuating travel is in the direction of the applied force.

3.14

working travel

distance travelled by a specified object, moving in the direction of the applied actuating force (3.8) , and measured from the point at which this object touches the effective sensing surface (3.10) , under specified conditions, to where a specified force is exerted on the object

Note 1 to entry: See Figure 2 and Annex B.

3.15

overtravel

difference between the working travel (3.14) and the actuating travel (3.13) when both these distances are measured with the same object applied under the same conditions

Note 1 to entry: See Figure 2.

3.16

force-travel relationship

relationship between the force applied and the distance travelled by a pressure-sensitive protective device (3.1) in operation

Note 1 to entry: See Figure 2.

3.17

reset

function which permits an ON state (3.6) in the output signal switching device (3.5) , provided that certain conditions are met

3.18

mounting orientation

orientation in space of the sensor (3.3)

3.19

total travel

movement or deformation of the effective sensing surface (3.10) of a pressure-sensitive protective device (3.1) , measured in the direction of the actuating force (3.8) from the point of contact to the point at which no further significant deformation of the effective sensing surface occurs

Figure 1 — Systematic sketch of pressure-sensitive protective device as applied to machine

Key

1	pressure-sensitive protective device
2	sensor(s)
3	control unit*
4	output signal switching device
5	part of the machine control system for pressure-sensitive protective device output signal processing
6	actuating force
7	sensor output
8	ON state/OFF state signal
9	manual reset signal**
10	reset signal from machine control system (where appropriate)
11	monitoring signals (optional)
a	manual reset signal to the machine control system***
b	machine control system(s)
*	Can be located within the machine control system or as part of the machine control system, e.g. as a logic block.
**	Where appropriate, this may be used as an alternative to a.
***	Where appropriate, this may be used as an alternative to 9.

Figure 2 — Diagram of force-travel relationship — Example

Key

A	actuating point and actuating force at maximum operating speed
B	force-travel points occurring at force of 250 N (B1) or 400 N (B2) at operating speed of ≤ 10 mm ⋅ s−1
C	force-travel point occurring, for example, at a force of 600 N at an operating speed of ≤ 10 mm ⋅ s−1
1	reference force
2	lowest actuating force
a	force, N
b	travel, mm
c	actuating travel
d	overtravel at 250 N
e	working travel at 250 N
f	overtravel at 400 N
g	working travel at 400 N
h	total travel