KR102267042B1 - Switch with b contact sensor - Google Patents

Abstract

The present invention relates to a switch with a B contact sensor, which comprises: a switch body (110) having a buffering part to perform a protective function from external impact and providing a first installation part (111) and a second installation part (112); a tape sensor (120) which is mounted on the first installation part (111) and is conductive by shock or pressure applied to the switch body (110) to output an operating load detection signal; and a B contact sensor (130) which is mounted on the second installation part (112) and connected to the tape sensor (120) to detect a normal operation of the tape sensor (120) and generate a contact output. In the B contact sensor (130), a B contact control circuit (131) is provided to maintain a contact output in an ON state to perform a switch function when a signal from the tape sensor 120 is input normally, converts a contact output to an OFF state to detect switch abnormality, disconnection of the tape sensor (120), and input voltage abnormality when the signal is abnormally input. Therefore, the functionality and safety of the switch can be significantly increased by being applied to a bumper switch, a mat switch, and an edge switch.

Description

Switch with B contact sensor {SWITCH WITH B CONTACT SENSOR}

The present invention relates to a switch having a B contact sensor, and more particularly, in a switch provided to secure safety from various external shocks by installing it at the edge of a bumper such as an unmanned transport vehicle, an industrial safety mat, and an automation system It relates to a switch configured to detect an abnormal operation of a switch by mounting a contact sensor and continue to perform a normal function.

In general, various types of safety means such as bumpers and safety mats are mounted on unmanned vehicles such as AGVs, LGVs, and RGVs, various industrial transportation vehicles such as EMS and Stocker, and automation systems to prevent various safety accidents that occur during operation. .

Safety means installed in such unmanned vehicles or automated systems are made of synthetic resin materials such as urethane and rubber with excellent buffering and resilience to perform a buffering function in case of external contact or collision, but to ensure safety by controlling operation through impact detection. Install various types of switches.

For example, Korean Patent Registration No. 10-1392992 discloses an unmanned transfer cart including first and second bumper switches that absorb shock and block the operation of the driving unit when a collision occurs. A base installed on the front and rear sides of the body, a cushion separating end installed to be spaced apart from the edge of the base, a tape switch installed between the cushion separating ends, and a bumper installed to have a built-in tape switch in the cushion separating end do.

As another example, in Korea Utility Model No. 20 - 0098576, a backup plate is attached so that a piezoelectric sensor can be attached to the base plate surface of a lightweight material, and an elastic rubber that supports both sides of the base plate and the corresponding sensitive plate by adhesive. It consists of a bumper device for an unmanned transport vehicle that attaches a cushioning material such as foamed sponge to the outer surface of the sensitive plate, and attaches and fixes the entire soft synthetic resin-based outer skin to the back of the base plate using staples. .

As another example, Korean Patent Registration No. 10 - 0881838 discloses a rubber base provided to be connected to the floor, a gap maintaining band that is adhesively fixed to all four edges of the upper surface of the base, and a plurality of spaces arranged inside the gap maintaining band. A protective mat switch including a tape switch, a surface plate attached to and fixed to the upper surface of the gap maintaining band, and a guide frame coupled to enable a strong fixation while accommodating the edges of the base and the surface plate is configured.

Korean Patent Registration No. 10-1392992 (2014.05.08) Korea Registered Utility Model No. 20 - 0098576 (1996.02.21) Korea Patent No. 10 - 0881838 (2009.02.03) Korean Patent Laid-Open Patent No. 10 - 2009 - 0108882 (2009.10.19)

A switch applied to a bumper or a safety mat to which the prior art as described above is applied is configured to detect an external impact by embedding a simple A-contact type tape switch therein.

A typical tape switch has an upper electrode and a lower electrode having a long plate shape, and an insulating pad interposed between the upper and lower electrodes to be spaced apart or in contact between the electrodes, and an insulating pad is provided on the upper side of the upper electrode. The film is inserted, and it is made in the form of finishing with a skin having a pressing protrusion in the center of the upper surface.

Since such a tape switch cannot exclude the possibility that internal wires and electrodes are easily damaged when an impact is applied to an installation target such as a bumper or a safety mat, in the prior art, an external controller is separately installed to determine whether the tape switch operates.

However, in the switch as in the prior art, the external controller reads the signal input from the tape switch unit to determine whether current flows or not, and when there is no input signal, determines that the wiring is disconnected, and turns off the relay contact. There is a problem in that the structure of the switch is complicated, such as a series of controls that stop the operation of the corresponding equipment.

Therefore, in the switch of the prior art, the failure of the tape switch cannot be detected quickly, so it is difficult to perform the original function of the switch when a safety accident occurs, and it is difficult to directly check whether the tape switch is disconnected when the external controller does not operate. It has the disadvantage of low usability.

Accordingly, the present invention was invented to solve the problems of the prior art as described above,

A switch body 110 having a buffer unit to perform a protective function from external impact and providing a first installation unit 111 and a second installation unit 112;

A tape sensor 120 mounted on the first installation part 111 and conductive by an impact or pressure applied to the switch body 110 to output an operating load detection signal;

and a B contact sensor 130 mounted on the second installation part 112 and connected to the tape sensor 120 to detect the normal operation of the tape sensor 120 and generate a contact output,

In the B contact sensor 130,

When the signal from the tape sensor 120 is input normally, the switch function is performed by maintaining the contact output ON state, and when the signal is input abnormally, the contact output is converted to the OFF state, whether there is a switch error or disconnection of the tape sensor 120, By having a B contact control circuit 131 for detecting the presence or absence of an input voltage, it is possible to achieve the purpose of remarkably improving the functionality and safety of the switch by applying it to bumper switches, mat switches, and edge switches.

The present invention provides a switch equipped with a B contact sensor in a switch provided to secure safety from various external shocks by installing it on a bumper of an unmanned transport vehicle, etc. or an industrial safety mat.

Therefore, the present invention eliminates the configuration of a separate external controller compared to the conventional simple A-contact type tape switch, and detects more quickly whether there is a switch abnormality, disconnection of the tape sensor, or abnormality of the input voltage. There is an advantage to ensure continuity.

In addition, the present invention has the effect of remarkably improving the overall safety rating of the system because it is possible to flexibly cope with the occurrence of a failure in some components because a double configuration of the tape sensor or the B contact sensor is possible.

1 and 2 are a schematic perspective view and a cross-sectional view of a bumper switch having a B contact sensor according to an embodiment of the present invention.
3 is a schematic cross-sectional view of a bumper switch having a B contact sensor forming a redundant structure.
Figure 4 is a perspective view of a mat switch having a B contact sensor according to the second embodiment of the present invention.
5 and 6 are schematic perspective and cross-sectional views of an edge switch having a B-contact sensor forming a redundant structure according to a third embodiment of the present invention.
7 and 8 are schematic diagrams showing the circuit structure of the B contact control circuit of the bumper switch having the B contact sensor according to the present invention.
9 is a diagram illustrating a state in which a bumper switch having a B contact sensor according to an embodiment of the present invention is applied to an unmanned transport vehicle.

Hereinafter, the configuration and operation of a switch having a B contact sensor according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings. In the following description, a detailed description of a part that can be easily implemented by a person skilled in the art may be omitted.

1 and 2 are schematic perspective and cross-sectional views of a bumper switch having a B-contact sensor according to an embodiment of the present invention, FIG. 3 is a schematic cross-sectional view of a bumper switch having a B-contact sensor forming a redundant structure, FIG. 4 is a perspective view of a mat switch having a B-contact sensor according to a second embodiment of the present invention, FIGS. 5 and 6 are a schematic perspective view of an edge switch having a B-contact sensor forming a redundant structure according to a third embodiment of the present invention, and 7 and 8 are schematic diagrams showing the circuit structure of a B contact control circuit of a bumper switch having a B contact sensor according to the present invention, and FIG. 9 is a B contact sensor according to an embodiment of the present invention. Branch shows an example of a state in which a bumper switch is applied to an unmanned vehicle.

A switch having a B-contact sensor to which the technology of the present invention is applied is installed in an automation system such as a bumper of an unmanned transport vehicle or an industrial safety mat to secure the safety of a vehicle body or a worker from various external shocks. Note that it relates to a technology for quickly detecting abnormal operation of a switch and ensuring continuity of function execution by mounting a

For this purpose, the switch having the B contact sensor of the present invention comprises a switch body 110 , a tape sensor 120 mounted inside the body, and a B contact sensor 130 , and specifically is as follows.

The switch body 110 is provided with a buffer to perform a protective function from external impact, and a first installation part 111 and a second installation part 112 are provided.

The switch according to the present invention consists of a switch selected from the group comprising a bumper switch, a mat switch, and an edge switch.

The bumper switch is a switch provided to relieve external shock and control operation by being mounted on a bumper provided on the front, rear or side of a vehicle body of an unmanned transport vehicle as shown in the embodiment of FIG. 9 .

As shown in Figure 1, the switch body 110 applied to the bumper switch is composed of a frame having a shape corresponding to the external shape of the vehicle body, and a buffer unit coupled to the frame, but inside the buffer unit facing the outside of the vehicle body. It is provided to form the first installation part 111 and the second installation part 112 .

The mat switch is a switch installed on the floor of various production lines or on the floor of the work space of the system to prevent safety accidents and control the operation.

5, the switch body 110 applied to the mat switch is made in a mat shape, and the first installation part 111 and the second installation part 112 are provided inside or on one side of the buffer part. configure to do

The edge switch is a switch for preventing safety accidents and controlling the operation by mounting at the corners of automatic doors or automatic warehouses of various industrial sites.

5, the switch body 110 applied to the edge switch is also provided to form the first installation part 111 and the second installation part 112 on the inside of the buffer part facing the outside of the edge. .

The tape sensor 120 is mounted on the first installation part 111 and is electrically conducted by an impact or pressure applied to the switch body 110 to output an operating load detection signal.

The tape sensor 120 is built in the first installation part 111 provided in the buffer unit according to the shape of the switch body 110 to output a detection signal when an external shock or pressure is applied, and the B contact sensor 130 ) to be sent to

The tape sensor 120 is composed of both electrode tapes made of a conductive material and an insulating pad provided therebetween, so that when an impact or pressure is applied from the outside, both electrodes pass through the insulating pad and become conductive to sense the operating load. make up

The tape sensor 120 is provided according to the shape of the switch body 110 which is coated with an insulating PVC outer shell and inserted into the first installation part 111 to form a different structure for each type of switch.

The B contact sensor 130 is mounted on the second installation part 112 and connected to the tape sensor 120 to detect whether the tape sensor 120 is operating normally and to generate a contact output.

As in the circuit structure schematically shown in FIG. 7 , the B contact sensor 130 performs a switch function by keeping the contact output ON when a signal from the tape sensor 120 is input normally, and the signal is abnormal. A B contact control circuit 131 is provided that converts the contact output to an OFF state at the time of input and detects a switch abnormality, disconnection of the tape sensor 120, and abnormal input voltage.

The B contact control circuit 131 forms a circuit structure that detects a disconnection or short circuit according to the signal input of the tape sensor 120 and operates a relay to derive a contact output. Therefore, it is configured to detect an abnormality in the applied voltage or disconnection of the tape sensor 120 and determine whether the switch is operated or not.

As shown in FIG. 8 , the B contact control circuit 131 includes a control unit 132 to implement an automatic mode, a manual mode, and a reset mode to automatically or Configured for manual control.

The automatic mode forms a circuit structure in which a contact output is generated when an abnormal signal is input, and the contact output is automatically returned to an original state when an abnormal signal is not input.

The manual mode forms a circuit structure that generates a contact output when an abnormal signal is input, and maintains a contact output even when an abnormal signal is not input.

The reset mode forms a circuit structure that eliminates the contact output maintained in the passive mode.

On the other hand, the switch body 110 is provided with a plurality of each of the first installation part 111 and the second installation part 112 as shown in FIG. 3 or 6, and the tape sensor 120 and the B contact The sensor 130 is configured to be redundant by installing a plurality of sets.

That is, as in the circuit structure shown in (b) of FIG. 7 , the tape sensor 120 mounted on one side of the first installation part 111 and the second installation part 112 provided on the switch body 110 and The B contact sensor 130 forms an output No. 1, and the tape sensor 120 and B contact sensor 130 mounted on the other side first installation part 111 and the second installation part 112 generate output 2 By configuring to form, even if an abnormality occurs in any tape sensor 120 or B contact sensor 130, the function of the switch is configured to derive an effect that can be performed normally.

A schematic usage state of a switch having a B-contact sensor to which the technology of the present invention is applied, which is configured as described above, is as follows. Since the following description is given by way of preferred embodiments of the present invention, the present invention is not limited by the following examples, and it will be natural that various modifications may be provided without departing from the scope of the present invention. .

The switch having the B contact sensor according to the present invention is a switch selected from the group including a bumper switch, a mat switch, and an edge switch.

For example, the voltage input to the bumper switch is normally applied, or the tape sensor 120 mounted on the switch body 110 is not disconnected, but is in a normal state, or an external shock (operating load) occurs in the switch body 110 . If not, the B contact sensor 130 connected to the tape sensor 120 operates the relay through the B contact control circuit 131 and maintains the contact output in a short-circuited (ON) state to function as a bumper switch. Works to perform normally.

On the other hand, the voltage input to the bumper switch is not applied or the power is disconnected, or the tape sensor 120 mounted on the switch body 110 is disconnected, or an external shock (operating load) is applied to the switch body 110 . In the generated state, the B contact sensor 130 connected to the tape sensor 120 operates a relay through the B contact control circuit 131 and converts the contact output to an open (OFF) state to detect an abnormality in the bumper switch. and operate to control the vehicle's motion.

In the bumper switch as described above, each of the first installation part 111 and the second installation part 112 is provided in plurality, and the tape sensor 120 and the B contact sensor 130 are provided in a first set and a second set, respectively. When installed with a dual circuit structure, the first set tape sensor 120 and the B contact sensor 130 form the first contact output according to the normal or abnormal state of the switch, and the second set tape sensor 120 . and the B contact sensor 130 simultaneously form a No. 2 contact output according to the normal or abnormal state of the switch.

Therefore, even if an abnormality occurs in any of the tape sensors 120 or the B contact sensor 130 in the bumper switch, for example, a defect occurs in the 1st contact output, the 2nd contact output operates normally, so that the switch function can be performed normally. can

In addition, the control unit 132 provided in the B contact control circuit 131 is configured to set the operating state of the B contact sensor 130 after detecting an abnormality of the switch by an automatic mode, a manual mode, and a reset mode.

For example, in the automatic mode, external pressure is applied to the switch to convert the contact output to an open (OFF) state, and then, when the external pressure is removed, the switch automatically returns to the short (ON) state, and in the manual mode, external pressure is applied to the switch. When the external pressure is removed after converting the contact output to the open (OFF) state by acting, the contact output is maintained in the open (OFF) state until the reset mode operates, and the contact output is short-circuited by operating the reset mode. ) to return to the state.

The switch having the B contact sensor according to the present invention as described above is a bumper switch provided to secure safety from various external shocks by installing it on a bumper of an unmanned transport vehicle, an industrial safety mat, an automatic door of various industrial sites, or an automatic warehouse, Provided is a switch in which the B contact sensor 130 is mounted together with the tape sensor 120 in the mat switch and the edge switch.

Therefore, the present invention not only excludes a separate external controller configuration compared to the conventional simple A-contact type tape switch, but also detects switch abnormalities, disconnection of tape sensors, and abnormal input voltages more quickly and accurately. It has the advantage of increasing the reliability of its functionality and safety.

In addition, the present invention enables the dual configuration of the tape sensor 120 or the B contact sensor 130 and various output settings by the control unit 132 to ensure the continuity of the function performance of the switch and even when a malfunction of some components occurs. Since it is possible to respond flexibly, there are effects such as being able to significantly improve the overall safety rating of the automation system and provide a safe working environment.

110: switch body
111: first installation part
112: second installation part
120: tape sensor
130: B contact sensor
131: B contact control circuit
132: control unit (MCU)

Claims (4)

A switch body 110 having a buffer unit to perform a protective function from external impact and providing a first installation unit 111 and a second installation unit 112;
A tape sensor 120 mounted on the first installation part 111 provided on the switch body 110 and conductive by an impact or pressure applied to the switch body 110 to output an operating load detection signal;
B contact sensor 130 that is mounted on the second installation part 112 provided on the switch body 110 and connected to the tape sensor 120 to detect whether the tape sensor 120 is in normal operation and generate a contact output. In the switch having a B contact sensor selected from the group consisting of, a bumper switch, a mat switch, and an edge switch,
In the B contact sensor 130,
When a signal from the tape sensor 120 is normally input, the switch function is performed by keeping the contact output ON state, and when the signal is input abnormally, the contact output is converted to the OFF state, whether there is a switch error or disconnection of the tape sensor 120, and a B contact control circuit 131 for detecting the presence or absence of an abnormality in the input voltage;
In the switch body 110, each of the first installation part 111 and the second installation part 112 is provided in plurality, and the tape sensor 120 and the B contact sensor 130 are installed in a plurality of sets. provided for redundancy,
In the B contact control circuit 131,
An automatic mode that generates a contact output when an abnormal signal is input and automatically returns the contact output to the original state when an abnormal signal is not input;
A manual mode that generates a contact output when an abnormal signal is input and maintains a contact output even when an abnormal signal is not input;
A switch having a B contact sensor, comprising a control unit 132 for implementing a reset mode for removing the contact output maintained in the manual mode. delete delete delete

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