JP2007220802A - Switch attachment device in electromagnetic wave shield room - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a switch attachment device in an electromagnetic wave shield room equipped with an automatic door, wherein an electromagnetic wave shield effect is more excellent. <P>SOLUTION: In the switch attachment device, a room switch 20 which controls an opening and closing motion of a door is provided in an electromagnetic wave shield room 10 having the automatic door, and the room switch 20 is arranged with an optical fiber 27 in the electromagnetic wave shield room. A light switch 34 is attached to the end of the optical fiber 27, connects a light emitting end 28 and a light receiving end 29 to front ends of a pair of two optical fibers 27, respectively, and is provided with a reflection plate 30 serving as a push button for reflecting beams from the light emitting end 28 to the light receiving end 29 so as to confront the light emitting end 28 and the light receiving end 29 so as to advance or retreat. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an apparatus for mounting a switch in an electromagnetic wave shield room that does not deteriorate the electromagnetic wave shield performance due to the presence of the indoor switch when the automatic door drive unit is controlled by the indoor switch installed in the electromagnetic wave shield room. It is.

Examples of environments that require electromagnetic shielding include an electric discharge machining room, an electroencephalogram measurement room, a broadcast studio, an airport radar control room, and a computer room, and an electromagnetic shielding room 10 as shown in FIG. 4 is configured. In the electromagnetic wave shield room 10, an electromagnetic wave shielding material is used for the ceiling panel 11, the wall panel 12, the floor panel 13, and the door 14, and in some cases, an electromagnetic wave shielding glass is used for the window 15.
In these electromagnetic wave shield rooms 10, the electromagnetic wave shielding mechanism of the opening 16 to which the door 14 is attached requires particularly careful consideration. For this reason, the conductive member 18 is attached around the opening 16 to be grounded. There are various inventions such as attaching a shield member 17 around the door 14 and providing a mechanism for closely contacting the opening 16 when the door 14 is closed (for example, Patent Document 1 and Patent Document 2).

However, since the door 14 is manually opened and closed, there is no particular problem if it does not have an electrical switch in the room. However, when the door 14 is an automatic door, it is opened, closed, and stopped in the room of the electromagnetic shielding room 10. The indoor switch 20 is attached, or the light emitting element 22 and the light receiving element 23 for detecting entry / exit into the electromagnetic shielding room 10 are attached. In order to attach the indoor switch 20, the light emitting element 22, and the light receiving element 23, the power cord 21 must be routed indoors to form an electric circuit and be electrically connected to the outside. Since the power cord 21 is electrically connected to the inside and outside of the electromagnetic shielding room 10, unnecessary external radio waves enter the electromagnetic shielding room 10 through the power cord 21. Further, if the indoor switch 20 is a contact having electrical operation, contact noise is generated when the indoor switch 20 is turned on / off. For this reason, the electromagnetic wave shielding performance of the electromagnetic wave shielding room 10 is deteriorated.
In order to reduce as much as possible the entry of unnecessary external radio waves into the electromagnetic wave shield room 10 through the power cord 21, as shown in FIG. 24 is intervened.
Reference numeral 19 denotes an outdoor switch for driving unit control, 25 denotes a signal processing circuit, and 26 denotes a driving control unit.
Japanese Patent Laid-Open No. 11-186749 Japanese Patent Laid-Open No. 5-44377

The problem to be solved is that the electromagnetic shield room 10 is opened and closed with an automatic door. In order to prevent intrusion of unnecessary radio waves from the power cord, even if the filter circuit 24 is interposed, the nature of the filter circuit 24 Even if noise of a specific frequency is removed to some extent, it cannot be completely removed, and contact noise when the indoor switch 20 is turned on / off cannot be removed.
An object of the present invention is to provide a switch mounting device in an electromagnetic shielding room having an excellent electromagnetic shielding effect in an electromagnetic shielding room equipped with an automatic door.

  The present invention relates to a switch mounting apparatus in an electromagnetic wave shield room in which an indoor switch 20 that controls opening and closing of the door 14 is provided in the electromagnetic wave shield room 10 having a door 14 that is automatically opened and closed by a drive unit. An optical fiber 27 is disposed in the electromagnetic wave shield room 10, and an optical switch 34 is attached to the end of the optical fiber 27. The optical switch 34 of the indoor switch 20 has a light emitting end at the tip of the optical fiber 27 as a set. Reflector 30 as a push button that couples light emitting end 28 and light receiving end 29, and reflects light from light emitting end 28 to light receiving end 29. Is a switch mounting device in an electromagnetic shielding room, wherein the switch mounting and retracting is provided.

  According to the first aspect of the present invention, in the electromagnetic wave shield room 10 having the door 14 that is automatically opened and closed by the drive unit, the indoor switch 20 that controls the opening and closing of the door 14 is provided. The indoor switch 20 has an optical fiber 27 disposed in the electromagnetic shield room 10, and an optical switch 34 is attached to the end of the optical fiber 27. Therefore, the power cord is eliminated and the outside unnecessary radio waves are prevented from entering. Even if no filter circuit is provided, noise of any frequency can be completely removed. Further, no contact noise is generated when the indoor switch 20 is turned on / off, and an electromagnetic wave shield room having a better electromagnetic wave shielding effect can be provided.

According to the second aspect of the present invention, the optical switch 34 of the indoor switch 20 couples the light emitting end portion 28 and the light receiving end portion 29 to the tip of the optical fiber 27 as a pair, and these light emitting end portions. Since the reflector 30 as a push button for reflecting the light beam from the light emitting end portion 28 to the light receiving end portion 29 is provided so as to be opposed to the light receiving end portion 29 and the light receiving end portion 29, the existing light beam that does not require an electric signal is provided. An electromagnetic shielding room can be easily realized by using a reflective sensor.

According to the third aspect of the present invention, the reflection plate 30 as a push button facing the light emitting end portion 28 and the light receiving end portion 29 includes at least an opening operation switch and a closing operation switch, and the closing operation switch Since the pressing amount of the reflecting plate 30 that operates is set to be larger than the pressing amount of the reflecting plate 30 that operates as the opening operation switch, the opening operation switch operates even with a slight pressing amount (distance) of the reflecting plate 30. The door 14 can be surely opened. Further, the closing operation switch can be set so as not to operate unless the reflecting plate 30 is strongly pressed and a sufficient pressing amount (distance), so that the heavy door 14 can be closed more safely. .

According to the fourth aspect of the present invention, the reflector 30 as a push button facing the light emitting end portion 28 and the light receiving end portion 29 includes at least an opening operation switch and a closing operation switch, and the closing operation switch Since the threshold value of the signal output of the reflecting plate 30 that operates is set to be larger than the threshold value of the signal output of the reflecting plate 30 that operates as an opening operation switch, the opening optical switch 34a has a slight push amount of the reflecting plate 30. The threshold value is set low so that it operates even at (distance) to ensure that the door 14 opens. In addition, the closing optical switch 34c sets the threshold value large so that it does not operate unless the reflecting plate 30 is strongly pressed and is sufficiently pushed (distance), and the heavy door 14 is closed more safely. It can be shown.

According to the invention of claim 5, the indoor switch 20 includes an optical fiber 27 disposed in the electromagnetic wave shield room 10, and an optical switch 34 is attached to an end portion of the optical fiber 27. A reflecting plate 30 as a push button for reflecting the light beam from the light emitting end portion 28 to the light receiving end portion 29 facing the light emitting end portion 28 and the light receiving end portion 29 at the tip of the optical fiber 27 as a set is provided so as to freely advance and retract. Since the closing prevention area sensor 36 is provided with the light emitting end 28 and the light receiving end 29 at the tip of the optical fiber 27 as a pair, facing each other on the both sides of the opening 16, the door opening / closing is performed. Not only the drive switch but also the closing prevention area sensor for entry / exit detection at the opening has no power cord, and no filter circuit is provided to prevent the entry of unnecessary external radio waves. And it is also possible to completely remove the noise of any frequency. In addition, it is possible to provide an electromagnetic wave shield room with a better electromagnetic shielding effect without generating contact noise when the closure prevention area sensor is turned on / off.

In the electromagnetic wave shield room switch mounting device according to the present invention, the indoor switch 20 and the closing prevention area sensor 36 are attached to the indoor side of the opening 16 of the electromagnetic wave shield room 10.
The indoor switch 20 and the closing prevention area sensor 36 are operated only by the light transmitted from the outdoor photoelectric converter 32 to the room through the optical fiber 27 and do not have an electric circuit. The indoor switch 20 includes a light emitting end 28 and a light receiving end 29 provided at the tip of each pair of optical fibers 27, and a reflection plate 30 as a push button provided so as to be able to move forward and backward. For example, three optical switches 34, specifically, an opening optical switch 34a, a stop optical switch 34b, and a closing optical switch 34c are included.
The optical fiber 27, the optical switch 34, and the switch box 35 are preferably made of a non-conductive material such as plastic as much as possible without using a conductive material in order to prevent electromagnetic waves from entering from the outside as much as possible.

  The closing prevention area sensor 36 is formed by attaching a light emitting end portion 28 and a light receiving end portion 29 with a distance so as to sandwich a passage inside the opening 16, and each end portion has an optical fiber 27 and has an outdoor side. It is connected to the light receiving element 23.

The light emitting element 22 in the photoelectric converter 32 converts an electric signal into an optical signal and outputs it to the optical fiber 27. The light receiving element 23 receives the optical signal from the optical fiber 27 and converts it into an electric signal. .
The optical switch 34 of the indoor switch 20 can be used by adjusting the threshold value of the signal output in accordance with the pushing amount (distance) of the reflecting plate 30.

A specific example 1 of a switch mounting device in an electromagnetic wave shielding room according to the present invention will be described with reference to FIGS.
Reference numeral 10 denotes an electromagnetic wave shielding room similar to that shown in FIG. 4. The electromagnetic wave shielding room 10 is composed of a ceiling panel 11, a wall panel 12, a floor panel 13, a door 14, and a window 15 made of an electromagnetic wave shielding material. Yes. The door 14 is an automatic door that opens and closes the opening 16, and the motor, the drive control unit 26, the pulley, the drive belt, etc. are completely electromagnetically shielded from the interior of the door 14. It is stored in. The door 14 may be a slide opening / closing type or a swing opening / closing type.

In the electromagnetic wave shield room 10, an indoor switch 20 and a closing prevention area sensor 36 are attached to the indoor side of the opening 16, and an outdoor switch 19 is attached to the outdoor side of the opening 16.
The indoor switch 20 and the closing prevention area sensor 36 operate only with light beams transmitted indoors from the outdoor photoelectric converter 32 through the optical fiber 27. Of these, the indoor switch 20 is capable of advancing and retreating against the light emitting end 28, the light receiving end 29, and the light emitting end 28 and the light receiving end 29 provided at the tip of each pair of optical fibers 27. It comprises a reflecting plate 30 as a push button provided, and is composed of three optical switches 34, specifically, an opening optical switch 34a, a stopping optical switch 34b, and a closing optical switch 34c.

  More specifically, as shown in FIG. 2, the optical switch 34 is provided with a light emitting end 28 and a light receiving end 29 side by side in a cylindrical housing 33, and a reflection plate 30 as a push button is attached to a spring 31. The pair of optical fibers 27 is connected to the light emitting end portion 28 and the light receiving end portion 29 one by one, and three optical switches 34, specifically, an opening optical switch 34a, A stop optical switch 34 b and a closing optical switch 34 c are attached to the switch box 35. The optical fiber 27, the optical switch 34, and the switch box 35 are preferably made of a non-conductive material such as plastic without using a conductive material as much as possible in order to prevent electromagnetic waves from entering from the outside as much as possible. .

  The closing prevention area sensor 36 is formed by attaching a light emitting end portion 28 and a light receiving end portion 29 with a distance so as to sandwich a passage between the right and left sides of the opening 16. The light emitting end portion 28 is connected to the outdoor light emitting element 22 with an optical fiber 27, and the light receiving end portion 29 is connected to the outdoor light receiving element 23 with an optical fiber 27. Is done.

The light emitting element 22 in the photoelectric converter 32 converts an electric signal into an optical signal and outputs it to the optical fiber 27. The light receiving element 23 receives the optical signal from the optical fiber 27 and converts it into an electric signal. .
The outdoor switch 19 is attached outside the electromagnetic shielding room 10 and has three contact switches 37 that are electrically turned on and off, specifically, an opening operation switch 37a and a stop operation switch 37b. , And a closing operation switch 37c.
The outdoor switch 19 and the photoelectric converter 32 are connected to a signal processing circuit 25 and further connected to a drive control unit 26 that controls an invisible motor or the like.

The operation in the above configuration will be described.
In order to enter the electromagnetic wave shield room 10, the outdoor operation switch 37a is pushed, and the electric signal is sent to the drive control unit 26 via the signal processing circuit 25 to activate the invisible drive device and to open the door. 14 is released. When a person enters through the opening 16, the door 14 is closed even if the closing operation switches 34 c and 37 c are pressed while the light beam from the light emitting end portion 28 to the light receiving end portion 29 of the area sensor 36 for preventing the closing is blocked. Is preventing.

That is, when a person enters the electromagnetic wave shield room 10, the light beam from the light emitting end portion 28 to the light receiving end portion 29 of the closing prevention area sensor 36 is temporarily blocked. The cut signal is converted into an electrical signal by the light receiving element 23 and sent to the signal processing circuit 25. Even if the reflecting plate 30 of the closing optical switch 34c is pushed by a command from the signal processing circuit 25, The drive control unit 26 is prevented from closing the door 14.

When a person enters the electromagnetic shielding room 10 through the opening 16, moves out of the area of the area sensor 36 for prevention of closure, and presses the reflection board 30 of the optical switch 34 c for closing the indoor switch 20, the reflection board 30 is connected to the light emitting end 28. When the light receiving end 29 approaches the light receiving end 29 and the amount of light received at the light receiving end 29 increases, the light is received by the light receiving element 23 of the photoelectric converter 32 via the optical fiber 27, and the light receiving amount exceeds the set threshold value. An electrical signal is sent from the converter 32 to the signal processing circuit 25 and the drive control unit 26, and the door 14 is closed by a command from the drive control unit 26.

When a person in the electromagnetic shielding room 10 exits the electromagnetic shielding room 10 and presses the reflecting plate 30 of the opening optical switch 34a of the indoor switch 20, the reflecting plate 30 approaches the light emitting end 28 and the light receiving end 29, When the amount of light received at the light receiving end 29 increases and the light beam is received by the light receiving element 23 of the photoelectric converter 32 via the optical fiber 27 and the received light amount exceeds a set threshold, the signal processing circuit from the photoelectric converter 32. 25, an electric signal is sent to the drive control unit 26, and the door 14 is opened by a command from the drive control unit 26

After the door 14 is opened, when a person leaves the electromagnetic wave shield room 10 and presses the closing operation switch 37c of the outdoor switch 19, a signal is sent to the drive control unit 26 via the signal processing circuit 25, and the door 14 is closed.
The stop operation switch 37b of the outdoor switch 19 and the stop optical switch 34b of the indoor switch 20 are operated when stopping full open, half open, or close.

  In the first embodiment, the opening optical switch 34a, the stopping optical switch 34b, and the closing optical switch 34c constituting the indoor switch 20 adjust the threshold value of the signal output according to the pushing amount (distance) of the reflecting plate 30. Can be used. For example, the opening optical switch 34a is set to have a small threshold value so as to operate even with a slight pressing amount (distance) of the reflecting plate 30 so that the door 14 is reliably opened. On the other hand, the closing optical switch 34c is large so that it does not operate unless the reflector 30 is pushed hard enough and the pushing amount (distance) is sufficient in order to close the heavy door 14 more safely. Set the threshold.

In the first embodiment, the outdoor switch 19 includes an opening operation switch 37a, a stop operation switch 37b, and a closing operation switch 37c. The indoor switch 20 includes an opening optical switch 34a, a stop optical switch 34b, and a closing operation switch 37c. The optical switch 34c is a three-point switch for each of an opening operation, a stopping operation, and a closing operation. However, the present invention is not limited to this, and the following configuration is also possible.
-Use a two-point switch for opening and closing.
A single-point switch for inching operation for an automatic door that performs an opening operation (or closing operation) with the first switch input and a closing operation (or opening operation) with the next switch input.
・ Add switches such as operation invalid and operation valid to the one-point switch.
-In the two-point method and the three-point method, switches such as operation invalidity and operation validity are added to the switches.

In the first embodiment, the indoor switch 20 can be used at night or in a dark room as long as it uses colored light rays and emits a push button.
In the first embodiment, the indoor switch 20 includes a light emitting end portion 28, a light receiving end portion 29, and a reflector 30 as a push button that reflects the light rays from the light emitting end portion 28 to the light receiving end portion 29 in opposition thereto. However, the present invention is not limited to this, and the light beam from the light emitting end portion 28 to the light receiving end portion 29 is configured to be turned on / off by blocking or allowing the light to pass through the push button. Also good.

It is a block diagram which shows one Example of the switch mounting apparatus in the electromagnetic wave shield room by this invention. It is the side view which carried out the partial cross section which shows the specific example of the indoor switch 20 in FIG. It is a block diagram of the switch mounting apparatus in the conventional electromagnetic wave shield room. 1 is a perspective view showing an example of an electromagnetic wave shield room 10. FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Electromagnetic shielding room, 11 ... Ceiling panel, 12 ... Wall panel, 13 ... Floor panel, 14 ... Door, 15 ... Window, 16 ... Opening, 17 ... Shield member, 18 ... Conductive member, 19 ... Outdoor switch, 20 ... Indoor switch, 21 ... Power cord, 22 ... Light emitting element, 23 ... Light receiving element, 24 ... Filter circuit, 25 ... Signal processing circuit, 26 ... Drive control unit, 27 ... Optical fiber, 28 ... Light emitting end, 29 ... Light receiving end , 30 ... reflector, 31 ... spring, 32 ... photoelectric converter, 33 ... housing, 34 ... optical switch, 35 ... switch box, 36 ... area sensor for prevention of closure, 37 ... operation switch.

Claims (5)

  In the electromagnetic wave shield room 10 having an indoor switch 20 for controlling the opening and closing of the door 14 in the electromagnetic wave shield room 10 having the door 14 that is automatically opened and closed by the drive unit, the indoor switch 20 is connected to the electromagnetic wave shield room 10. A switch mounting apparatus in an electromagnetic shielding room, wherein an optical fiber 27 is disposed therein and an optical switch 34 is mounted at an end of the optical fiber 27.   The optical switch 34 of the indoor switch 20 is coupled with a light emitting end 28 and a light receiving end 29 at the tip of an optical fiber 27 that is a set of two, and faces the light emitting end 28 and the light receiving end 29. 2. The switch mounting device in an electromagnetic wave shield room according to claim 1, wherein a reflection plate 30 as a push button for reflecting the light beam from the light emitting end portion 28 to the light receiving end portion 29 is provided so as to be able to advance and retreat.   The reflecting plate 30 as a push button facing the light emitting end portion 28 and the light receiving end portion 29 includes at least an opening operation switch and a closing operation switch, and the amount of pressing of the reflecting plate 30 operating as the closing operation switch is as follows. 3. The switch mounting device in an electromagnetic wave shield room according to claim 2, wherein the switch mounting device is set to be larger than a pushing amount of the reflecting plate 30 that operates as an opening operation switch.   The reflection plate 30 as a push button facing the light emitting end portion 28 and the light receiving end portion 29 includes at least an opening operation switch and a closing operation switch, and a signal output threshold value of the reflecting plate 30 operating as the closing operation switch. 3. The switch mounting device in the electromagnetic wave shield room according to claim 2, wherein is set to be larger than a signal output threshold value of the reflection plate 30 operating as an opening operation switch. A door 14 that opens and closes automatically by a drive unit facing the opening 16 of the electromagnetic wave shield room 10 is provided, and an area sensor 36 for preventing closure is provided on the indoor side of the electromagnetic wave shield room 10, and the opening and closing of the door 14 is controlled. In the switch mounting apparatus in the electromagnetic wave shield room provided with the indoor switch 20, the indoor switch 20 has an optical fiber 27 disposed in the electromagnetic wave shield room 10, and an optical switch 34 is attached to the end of the optical fiber 27. The switch 34 is a reflecting plate as a push button that reflects the light beam from the light emitting end portion 28 toward the light receiving end portion 29 against the light emitting end portion 28 and the light receiving end portion 29 at the tip of the optical fiber 27 as a set. 30 is provided so as to be able to move forward and backward, and the area sensor 36 for preventing closure is a pair of optical fibers 2. Switch mounting apparatus in the electromagnetic shield room to a tip of the light emitting end 28, characterized in that provided so as to face both sides of the receiving end 29 and a mutually opening 16.

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