KR19990086873A - Emergency switch - Google Patents

Abstract

OBJECT: The present invention provides an emergency switch that does not malfunction except when it is necessary to urgently or stop urgently stopping the operation of mechanical equipment such as an emergency.

Configuration: The emergency switch of the present invention has an internal cavity and a switch body having one side opened, a switch mounted at a predetermined position inside the switch body, and a handle which can be easily pulled and operated at the front end, and the lower half of the A button axially supported in the cavity of the switch body and interlocked with the handle to short the two terminals of the switch, a ratchet mechanism for restraining the movement of the button to maintain the position of the button, and interlocking the ratchet mechanism Characterized in that the release is provided to release the restraint of the button.

Effect: The emergency switch of the present invention includes a structure capable of preventing an unexpected malfunction of the machine by simply pulling a button, and thus preventing malfunctions due to user error. It is possible to prevent breakdown of machinery and damage of manufacturing logistics.

Description

Emergency switch

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an emergency switch operated in a pulling on manner, and more particularly to an emergency switch used when an emergency or an emergency need to stop an operation of a mechanical facility.

Typically, mechanical equipment operated by electric power is provided with an emergency switch used for urgently stopping all operations of the system in case of an emergency or emergency in addition to the main switch for opening and closing the power.

In particular, emergency switches are indispensably employed in expensive equipment such as semiconductor manufacturing equipment, equipment requiring complicated operation procedures to shut down the system, or manufacturing equipment requiring strict environmental maintenance.

The emergency switch can be operated at the time of detecting an electrical damage or failure due to an overload of the equipment or when there is a serious problem in operation, so that the equipment can be quickly shut down to protect the equipment and take immediate measures against manufacturing problems. Can be taken.

Therefore, the emergency switch should be able to be operated as quickly and easily as possible so that the emergency switch is installed near the operator operating the machine.

The manufacturing equipment shown in Figure 1 is an automatic wet station (AUTOMATIC WET STATION) for the chemical processing, pure water cleaning and drying process while automatically conveying the semiconductor wafer, a large number of emergency switches (S) for the rapid operation of the operator It is customary that) are installed.

As a related art known as an emergency switch employed in mechanical equipment, an emergency switch capable of releasing a pushed button by pressing a pin bar provided at the center of a button is disclosed in Korean Utility Model Publication No. 96-5883. have.

As shown in FIG. 2, the emergency switch disclosed herein includes a button hole 312 formed at an upper portion of a cover 310 forming a case, which is supported from the base plate 320 by springs 346a and 346b. 340 is fitted, the pin bar hole 342 is formed in the center of the button 340, the pin rod 382, which is supported from the base plate 320 by the spring 386 is fitted, and the button 340 Guide piece 344 having a vertical guide groove 348 is formed at the bottom of the), the base plate 320 is provided with a switch 350 to hold the protruding knob 352, the pin rod 380 The lower end of the switch 350 is formed with a wedge-shaped protrusion 384 for pushing the knob 352 from the vertical guide groove 348, in case of emergency by pressing the button 340 to the usual guide piece 344 The knob 352 of the switch 350 that was pressed by The emergency operation signal is output from the switch 350 by entering the inner groove 348, and the knob 352 of the switch 350 that has entered the vertical guide groove 348 by pressing the pin bar 380 when releasing the emergency operation. ) By pushing to the side wall of the guide piece 44 to block the emergency operation signal output from the switch 350.

On the other hand, as another conventional technology known in relation to the emergency switch is disclosed in the Republic of Korea Utility Model Publication No. 90-8211 for the structure of the emergency switch knob coupled with the bush rotated by the spring elasticity.

The emergency switch disclosed herein forms a binding piece 414 on both inner sides of the coupling hole 412 drilled in the cover 410 as shown in FIG. 3 to hang one end of the spring 486 on the coupling hole 410. Hook the binding jaw 482 on both sides of the bush 480 to give, and the hook in the other side of the bush 480 to form a hook piece 484 in the guide groove 442 formed on both sides of the button 440 As a structure to hang the jaw 444, pressing the button 440 during emergency operation, an emergency operation signal is output from the switch 450 installed in the base plate 420, the bush 480 to release the emergency operation When rotated counterclockwise and then released, the button 440 is returned to its original position so that the output of the emergency operation signal is cut off from the switch 450.

However, all emergency switches known to date, including the emergency switches provided by the two conventional techniques exemplified above, were operated in a pushbutton manner, and some of them are unintentionally misoperated due to user error during operation. There is a case.

As described above, the conventional emergency switch operated by the pushbutton method is particularly susceptible to interference with the body or the package of the operator because the button is exposed to the outside of the mechanical facility, and thus the operation of the conventional emergency switch is more likely.

In addition, the conventional emergency switch may be inadvertently misoperated, such as a button being pressed by an operation of opening and closing the cover of the machine even when the built-in type is mounted inside the machine.

As such, if the mechanical equipment in normal operation is suddenly stopped due to an incorrect operation of the emergency switch due to an error, logistics damage due to the damage of the product being manufactured is suffered.

For example, in the semiconductor manufacturing process, if the exposure equipment is turned off due to an unexpected emergency switch malfunction during the exposure of the wafer, the wafer that has been exposed to exposure will not only be regenerated but also hassle-free replacement of a new wafer. do. In addition, if the emergency switch malfunctions in the process such as etching or diffusion, and the entire system of the equipment is turned off, the economical loss is huge because the wafers in which the process is stopped must be discarded.

The damage caused by the misoperation of the emergency switch is not limited to logistics damage.

Mechanical equipment emergency stop by emergency operation of emergency switch takes a lot of time to restart. Furthermore, it takes more time for the mechanical equipment to be given new activation condition according to the mechanical equipment. Becomes large.

In addition, when the emergency switch is incorrectly operated, failure of the mechanical equipment may be caused due to the shock caused by the rapid braking of the mechanical equipment or the components constituting the mechanical equipment are not braked at a predetermined position.

On the other hand, some of the conventional emergency switch to protect the closed end of the push button-type emergency switch as described above, the protector of the appropriate size is put on the button exposed to the outside, in this case, the protector is dismantled or destroyed Since it is necessary to press the button of the emergency switch through the small hole formed in the protector or the next operation, there is a negative aspect which is not compatible in an emergency requiring quick operation, and it is only partially applied in a specific field such as a fire alarm of a building.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and an object of the present invention is to provide an improved emergency switch capable of quickly operating in an emergency requiring an emergency and eliminating erroneous operation due to negligence during operation. Leave.

In order to achieve this object, the emergency switch of the present invention is characterized in that a button having a handle that can be easily pulled and operated, and a switch for controlling a power or electric signal according to the pull operation of the button.

In addition, the emergency switch of the present invention has an internal cavity and a switch body having one side open, a switch mounted at a predetermined position inside the switch body, and a handle which can be easily pulled and operated at the front end, and the lower half of the A button axially supported in the cavity of the switch body and interlocked with the handle to short the two terminals of the switch, a ratchet mechanism for restraining the movement of the button to maintain the position of the button, and interlocking the ratchet mechanism Characterized in that the release is provided to release the restraint of the button.

The emergency switch of the present invention having such a feature does not malfunction even when an unexpected pressure is applied to the button of the emergency switch due to an error during operation, and only when the emergency switch button is pulled out, the emergency switch signal is transmitted to the machine. This allows the equipment to be emergency stopped, thus minimizing losses due to misoperation.

1 is an external view of a machine facility illustrating an installation state of an emergency switch;

2 and 3 are structural cross-sectional views of a conventional emergency switch, respectively;

4 and 5 are an external perspective view and a structural sectional view of the emergency switch according to the first embodiment of the present invention;

6 is a structural cross-sectional view of an emergency switch according to a second embodiment of the present invention;

7 and 8 are each a system circuit block diagram configured in conjunction with the emergency switch of the present invention.

Explanation of symbols on the main parts of the drawings

120, 220: switch body 122, 222: internal cavity

140, 240: button 142, 242: handle

144: flange 146: ball spring

150, 250: switch 152, 252: knob

160, 260: Ratchet mechanism 162, 262: Unidirectional tooth

164, 264: Ratchet 180, 280: Release

182: release button 184: load

186: spring 188: spring seat

245: cam face 282: trigger

Hereinafter, with reference to the drawings will be described in detail a preferred embodiment for implementing the emergency switch of the present invention.

First embodiment

4 and 5, the emergency switch of the present invention, the cavity 122 is formed therein, and the switch body 120 having one side opened, the switch 150 mounted at a predetermined position inside the switch body 120 The lower half is accommodated in the internal cavity 122 of the switch body 120 and the button 142 is raised by being pulled by the handle 142 to short the two terminals a and b of the switch 150, The ratchet mechanism 160 restrains the movement of the button 140 to maintain the position of the towed button, and the release 180 releases the button 140 restrained by the ratchet mechanism 160.

A flange 144 is formed in the middle of the button 140, and a ball spring 146 is interposed between the flange 144 and the switch body 120 so that the button 140 enters the switch body 120. In the direction of the direction.

The switch 150 is a normally closed type in which terminals (a and b) are opened while a pressure is applied to the knob 152, and in a state where terminals (a and b) are shorted when no pressure is applied to the knob 152. (常 閉 形) is applied, and the upper portion of the button 140 is attached to a substantially rectangular handle 142 so that the user is easy to grip.

The ratchet mechanism 160 is composed of a ratchet 164 having a one-way teeth 162 formed on the side surface of the button 140 and a ratchet protrusion 164a meshed with the one-way teeth 162. The middle portion of the 164 is rotatably coupled to the switch body 120 by the hinge shaft 164b, and the opposite end of the ratchet protrusion 164a is inserted by the hinge shaft 164c inserted through the long hole 164d. It is axially connected to the lower end of the release 180.

The release 180, one end is formed of a release button 182, from which the rod 184 extends to be axially connected to the ratchet 164, which is a spring supported on the spring seat (188) 186) so that the release button 182 is always protruded out of the switch body 120.

The emergency switch according to the embodiment of the present invention configured as described above operates as follows.

Normally, the button 140 of the emergency switch is pressed by the ball spring 146 to apply a pressing pressure to the knob 152 of the switch 150 mounted inside the switch body 120, which is the ratchet The one-way teeth 162 on its side are engaged with the ratchet protrusion 164a of the mechanism 160, so that the switch 150 is turned off because the knob 152 is pressed.

The on / off operation relationship of the switch 150 should be appropriately adopted according to the configuration of the external device to which the signal of the switch 150 is applied, and a description thereof will be found in the application examples of the present invention described below. .

On the other hand, in case of emergency to stop all the operation of the mechanical equipment urgently, the user pulls the handle 142 provided on the upper button 140 of the emergency switch is performed by a simple operation.

That is, in response to the user pulling the handle 142, the button 140 moves in a direction that resists the ball spring 146, and at the same time, the one-way teeth 162 of the side are engaged with the ratchet protrusion 164a. Repeating (iii), as a result, the handle 142 is withdrawn from the switch body 120 to the outside. Accordingly, the knob 152 of the switch 150 located below the button 140 is released from the pressed state so that the two terminals a and b of the switch 150 are turned on to output the emergency operation signal. do.

At this time, the ratchet 164 of the ratchet mechanism 160 is engaged with the one-way teeth 162 by the clockwise rotational force on the drawing by the spring 186 holding the release button 182, thereby causing the button ( 140 is stopped by the ratchet 164 in the towed position, so that the switch 150 continues to output the emergency operation signal.

In this way, the emergency switch of the present invention that is pulled on and operated is maintained as long as the switch 150 installed in the switch body 120 is not damaged even if it is destroyed by an accident.

On the other hand, the off operation of the emergency switch is performed by pressing the release button 182.

Accordingly, the ratchet 164 of the ratchet mechanism 160 interlocked with the release button 182 is rotated to be separated from the one-way teeth 162 formed on the side surface of the button 140, and immediately to the bullet spring 146. As the elastic force stored therein acts, the button 140 enters the inside of the switch body 120 and presses the knob 152 of the switch 150. Thus, the two terminals a and b of the switch 150 are pressed. ) Is open to stop the output of emergency operation signal.

The present invention is not limited to the above-described embodiment and may be implemented as in the following second embodiment.

Second embodiment

The emergency switch of the present invention shown through the second embodiment of FIG. 6 includes a switch body 220 having one side open and an internal cavity 222 formed therein, and a switch mounted at one side of an inner bottom of the switch body 220 ( 250, and a handle 242 formed at an upper portion thereof, a button 240 having a lower half housed in an inner cavity 222 of the switch body 220, and a ratchet mechanism 260 restraining movement of the button 240. And a release 280 for releasing the ratchet mechanism 260 to release the movement of the button 240.

The inside of the button 240 is formed of a through hole 247 through which the release 280 can be installed, and a cam surface 245 interfering with the knob 252 of the switch 250 on the side of the lower end thereof. ) Is formed.

In addition, the release 280 is supported in the through hole 247 of the button 240, the upper one side of the shaft by the hinge shaft 248, one side portion of the trigger protruding to the outside of the handle (242) ( 282, the opposite end portion having a ratchet 264 protruding out of the through hole 247.

Corresponding to the ratchet 264 of the release 280 as described above, one-way teeth 262 are formed on the inner wall of the switch body 220 to form the ratchet mechanism 260 together with the ratchet 264.

In addition, the release 280 is oriented by the torsion spring 246 inserted into the hinge shaft 248 in a predetermined direction to have the ratchet 264 in close contact with the one-way teeth 262.

In this embodiment, the switch 250 is shorted between the terminals a and b when the knob 252 is pressed, as opposed to the first embodiment, and is connected between the terminals a and b when the knob 252 is released. The upper open type is applied.

The operation of the second embodiment of the present invention configured as described above will be described.

When the user pulls the handle 242 of the button 240 in an emergency, the button 240 is raised to the pulled position and then maintained by the engagement of the ratchet 264 and one-way teeth 262, accordingly Since the cam surface 245 of the button 240 presses the knob 252 of the switch 250, the switch 250 shorts the terminals a and b to output an emergency operation signal.

In addition, when the user wants to turn off the emergency switch outputting the emergency operation signal, the user can perform a simple operation of holding the handle 242 together with the trigger 282 and pushing it.

That is, when the trigger 282 is pulled, the ratchet 264 is separated from the one-way teeth 262 to allow the button 240 to enter the inside of the switch body 220.

In this way, when the button 240 is pushed in, the knob 252 of the switch 250 is released from the interference of the cam surface 245, so that the terminals a and b of the switch 250 are opened to stop the output of the emergency operation signal. do.

As described in the above two embodiments, the switch mounted in the switch body can adopt both an open type in which a knob is pressed and a short between the two terminals, and an open and close type in which the knob is pressed and an OFF between the two terminals. Able to know.

Hereinafter, the application example which can be implemented using the emergency switch of this invention is demonstrated.

First application example

The application example of FIG. 7 employs a normally closed switch 150 and constitutes a system suitable for this switch, so that the power supply of the equipment is cut off when the knob of the switch is released as in the first embodiment described above. .

That is, when the knob is pressed and the terminals a and b of the switch 150 are turned off, the power supply V + is not applied to the plurality of relays K1 to Kn provided in the facility. The contact of Kn is turned on so as to supply power to the mechanical equipment normally. On the contrary, when the knob is released and the terminals a and b of the switch 150 are turned on, power is applied to the relays K1 to Kn. The contacts of each relay K1 to Kn are turned off to cut off the power supply to the mechanical equipment.

Second application example

The application example of FIG. 8 employs an open switch 250 such that the power supply to the mechanical equipment is cut off when the knob of the switch is pressed and the terminal is turned on as in the above-described second embodiment.

That is, the switch 250 grounds the signal input to the microcomputer (μ-Ρ), thereby cutting off the contacts of the relays K1 to Kn to cut off the power supply of the mechanical equipment.

As in the above two application examples, a technique for cutting off power to mechanical equipment by operating an emergency switch may be implemented in various ways.

On the other hand, the emergency switch of the present invention operated in a pull-on manner can be implemented in various forms. For example, instead of the above switch, two lead contacts having a large contact area are inserted into the insert molding so as to face each other on the bottom of the switch body. It can also be configured in such a manner that direct current is controlled by insert molding to function as a switch.

As demonstrated in the configuration and operation described above, the emergency switch of the present invention substantially solves the problems of the conventional emergency switch.

That is, the emergency switch of the present invention is to emergency stop the machine equipment by sending the emergency operation signal by simply pulling the button, and includes a structure that does not malfunction even if the pressing pressure is applied to the button due to an unexpected user error. In addition, since it does not include a protector that was provided in the conventional emergency switch in order to prevent a false operation, it is possible to quickly operate.

Therefore, the present invention prevents the damage of manufacturing logistics that may be caused by the misoperation of the emergency switch, does not require a lot of time and labor required for restarting the emergency stop of the equipment, and also caused by sudden braking or the like. There is an effect to eliminate the failure of the mechanical equipment.

On the other hand, the present invention is not limited to the specific preferred embodiment described above, it is a matter of course that various applications are possible within the technical spirit described in the claims by ordinary knowledge in the art.

Claims (9)

In the emergency switch used to emergency stop all operation of the machine in an emergency, A button with a handle for easy pull operation; Emergency switch, characterized in that provided with a switch to control the power or electric signal in accordance with the pull operation of the button. In the emergency switch used to emergency stop all operation of the mechanical equipment in an emergency, A switch body having an inner cavity and opened at one side thereof; A switch mounted at a predetermined position inside the switch body; A button having a handle that can be easily pulled and operated at the front end, the lower half being axially supported in the cavity of the switch body, and shorting two terminals of the switch in association with the handle; A ratchet mechanism for restraining the movement of the button to maintain the movement position of the button; Emergency switch, characterized in that provided with a release interlocking the ratchet mechanism to release the restraint of the button. 3. The ratchet mechanism of claim 2 wherein A one-way tooth formed on the side of the button; Emergency switch, characterized in that consisting of a ratchet interlocked with the one-way teeth in conjunction with the release. 3. The emergency switch according to claim 2, wherein a flange is formed on a side of the button and a spring is provided between the flange and the switch body to hold the button. The method of claim 3 or 4, wherein the release is A release button for interlocking the ratchet and disengaging the ratchet with the one-way teeth; Emergency switch characterized in that it comprises a spring for holding the release button and the engagement between the ratchet and the one-way teeth. The method of claim 2, wherein the switch The emergency switch is pressed by the knob characterized in that the two terminals are short-circuited with each other. The emergency switch according to claim 2, wherein the switch is a normally closed type in which two terminals are turned on by pressing the knob, and the button has a cam surface that interferes with a knob of the switch at a lower end side. The method of claim 7, wherein the release is one side of the trigger and the other end is integrally provided with the ratchet of the ratchet mechanism, the inner surface of the switch body is characterized in that the structure is formed with one-way teeth to be engaged with the ratchet. Emergency switch. The emergency switch of claim 7, wherein the release is carried in a predetermined direction by a torsion spring inserted into the hinge shaft.