JPH0592397U - Safety switch in electric shutter - Google Patents

Abstract

(57) [Summary] [Purpose] If there is an obstacle that obstructs the descent of the shutter curtain, the shutter curtain is stopped immediately before the obstacle comes into contact with the seat plate, and the obstacle is sensed. To protect the projector and receiver. [Configuration] An obstacle is seated on the seat plate 5 at the bottom end of the shutter curtain at both left and right sides hidden by the guide rails 3.
The light emitter 7 and the light receiver 8 are arranged at a position projecting below the lower surface of the seat plate so that the light path is blocked before they come into contact with the The seat plate 5 is provided so as to be retractable so that it can be inserted into the seat plate from the lower surface of the plate.

Description

[Detailed description of the device]       [0001]     [Industrial applications]   The present invention is for safety in electric shutters installed in openings of houses and buildings. It is about switches.       [0002]     [Problems to be Solved by Prior Art and Invention]   Generally, some electric shutters of this type are located far away from the control room, etc. The electric motor is driven by the remote operation command to move the shutter curtain up and down. There is something like this. In such a case, prevent the shutter curtain from descending. Even if there is an obstacle, it cannot be confirmed directly from the control room. If the descending control command is issued without knowing that there is, the shutter curtain will collide with the obstacle. As a result, obstacles may be damaged, or the reverse winding phenomenon of the shutter curtain may occur, resulting in an electric shutter. -There were various inconveniences such as damage to itself.       [0003]   Therefore, we installed a sensor on the seat to detect obstacles, and when the shutter curtain descends, When the sensor detects an obstacle, the shutter curtain will stop descending. There is something made. However, conventionally, the sensor that senses an obstacle is A seat plate, such as a tape switch, that closes and senses when it is pressed into contact It was configured by mounting on the bottom surface. For this reason, the obstacle is detected only when it is detected. It will be in a state where it is pressed directly against the seat plate by sandwiching the push switch, and as a result, Even if the shutter curtain stops immediately due to the detection of a harmful object, the obstacle remains seated. It is often forgiven that it will be pressed and damaged by the plate, it is simply a shutter If you just stop the curtain, the seat plate will remain pressed against the obstacle. A shutter that cannot be removed and stopped due to the detection of an obstacle. It is necessary to take measures such as raising the curtain from the stop position by an appropriate amount. , Was a cause of the complexity of the control mechanism.       [0004]   There, a ray of light is run below the seat plate, and the obstacle blocks the light to sense the obstacle. Something that has been made known is proposed, but this one has traditionally been installed on both left and right sides of the seat plate. Providing a pair of reflectors, the light from the light emitter / receiver attached to the shutter case is Reflect in the vertical direction between the emitter and receiver and one of the reflectors, and in the horizontal direction between the left and right reflectors. Detects when the light beam between the left and right reflectors is blocked by an obstacle while running I was trying to do it. However, this one is to reflect the light rays from the light emitter / receiver. The angle adjustment of the reflector is extremely difficult due to the fact that it has to be changed accurately vertically and horizontally. This is not a difficult forgiveness, but the light dimming (loss) is extremely strong because it uses light reflection. In addition to problems such as the need for a high-quality light source and a highly sensitive light receiving system, the reflector Must be installed so that it projects below the bottom surface of the seat plate. When closed, the reflector will come into contact with the ground prior to the seat and will stop at this point. The seat plate will not be in contact with the ground and will be in an incompletely closed state. If the plate is lowered until it touches the ground, the reflector will be pressed against the ground and damaged. I still had a problem.       [0005]     [Means for Solving the Problems]   The present invention has a name that can eliminate these drawbacks in view of the above situation. It was created for the purpose of providing the information, and While driving the electric motor to guide the shutter curtain to the left and right guide rails In an electric shatter that can be moved up and down, the shatter cart At the left and right ends of the bottom seat plate hidden by the guide rails, Seat plate so that the optical path is blocked before an obstacle that obstructs the descending of the ten touches the seat plate. Place the sender and receiver at a position that protrudes below the bottom surface, Is a transmitter that transmits a stop signal to a receiver on the lifting control mechanism side by blocking the optical path, A power supply for operating the transmitter and the light receiver / receiver is provided, and the transmitter / receiver is further provided. The optical device can be pushed into the seat plate from the bottom of the seat plate by pushing it up from below. It is characterized in that it can be freely appearing and disappearing.       [0006]   According to this configuration, the present invention provides an emitter / receiver on the lower surface of the seat plate to prevent obstacles. It is possible to make an emergency stop before it touches the seat plate. It is designed to ensure the protection of the.       [0007]     【Example】   Next, an embodiment of the present invention will be described with reference to the drawings. In the drawings, 1 is electric A shutter curtain for a shutter, wherein the shutter curtain 1 is a control room By driving the electric motor 2 in response to a command from the lifting control mechanism A provided in It moves up and down to open and close the opening. In addition, 3 is a guide Rails 4 are shutter cases.       [0008]   Reference numeral 5 is a seat plate attached to the lower end of the shutter curtain 1. In the present embodiment, the guide rail 3 of the seat plate 5 has a guide rail 3 formed of a tubular shape. The hidden left and right ends are opened by notching the bottom surface. And this A movable box 6 is fitted in the opening 5a so as to be vertically slidable. -In the position before reaching the lower limit position of the curtain 1, the movable box 6 is below the seat plate 5 by its own weight. Although it protrudes to the lower side, when the shutter curtain 1 descends to the lower limit position, the movable box 6 Make sure that the bottom surface touches the floor surface and sinks into the seat plate 5 so that the seat plate 5 contacts the floor surface. There is.       [0009]   7 is a projector mounted in one movable box 6 and 8 is a receiver mounted in the other movable box 6. The movable box 6 is an optical device, and the movable box 6 is more than the bottom surface of the seat plate 5 by these light emitting and receiving devices 7 and 8. By hanging downward, it is blocked by the presence of obstacles below the seat plate 5. The optical path B is formed. Then, these light emitting / receiving devices 7 and 8 and a transmitter 1 described later. 0 is a lead wire for a power source (battery) 9 provided at an appropriate position on the indoor side upper surface of the seat plate 5. It is connected via 9a. The transmitter 10 is the same as the power source 9 on the indoor side of the seat plate 5. Although it is attached to the top surface, it is attached to the receiver 11 attached to the shutter case 4 side. An optical signal is emitted from the transmitter 10, and the optical signal from the transmitter 10 is transmitted through the optical path B. If there is no interruption, there will be no transmission, but the shutter curtain As the optical path B is blocked by the presence of an obstacle that obstructs the descent of 1, it is transmitted. I'm running. Further, the receiver 11 is interlockingly connected to the above-described lifting control mechanism A. Then, by receiving the optical signal from the transmitter 10, A stop command for stopping the descent of the tar curtain 1 is issued.       [0010]   Further, 12 is a switching switch, and the switching switch 12 is provided on the seat plate 5. However, the switch lever 12 has switch levers 12a and 12b. Each is provided. And one of the switch levers 12a is -When the upper limit of Ten 1 is reached, it will be opened when it is disengaged from the guide rail 3. The switch lever 12 b of the seat plate 5 is grounded at the lower limit of the shutter curtain 1. Based on this, it is opened by being pressed by the movable box 6 that has risen, The switching switch 12 is based on the operation of these switch levers 12a and 12b. Then, the power is turned off and the operation of the light emitters / receivers 7, 8 and the transmitter 10 is started. It comes to stop automatically.       [0011]   In the embodiment of the present invention constructed as described above, the shutter curtain 1 is now When a command for lowering is issued from the lift control mechanism A, the command is received and the electric motor is received. The shutter 2 is driven and the shutter curtain 1 is lowered. At this time, -During the descent process of the curtain 1, the obstacle of the shutter curtain 1 interferes with the obstacle. In the present invention, the seat plate 5 is formed below the seat plate 5 before it strikes an obstacle. The blocked optical path B is blocked by an obstacle, and the transmitter 10 receiving this is blocked by the receiver 11 side. By sending an optical signal to the shutter, the descent of the shutter curtain 1 is immediately stopped. It will be stopped.       [0012]   As described above, in the present invention, the presence or absence of an obstacle is detected by blocking the optical path B running below the seat plate 5. If there is an obstacle, make sure that the seat plate 5 does not hit the obstacle. It is possible to stop the yatsuta curtain 1 and prevent damage to obstacles in advance. This optical path B uses the light-emitters 7 and 8 provided at the left and right ends of the seat plate 5, respectively. Since it is formed directly, the light is similar to that formed using a conventional reflector. There is almost no loss, so it is necessary to use a particularly large amount of light on the projector 7 side. In addition, there is no need to use a particularly sensitive one on the light receiver 8 side. Perhaps it is extremely versatile, but the power consumption of the light-emitters 7 and 8 is low. The size of the guide rail 3 is small, and the size of the guide rail 3 is small.       [0013]   Furthermore, the transmitter 10 is only able to transmit when the optical path B is blocked by an obstacle. Since the optical signal is emitted from 0, the power consumption by the transmitter 10 is an obstacle. Very little in normal times without material. Therefore, the transmitter / receivers 7 and 8 and the transmitter 1 0 is operated by a power source 9 completely independent from the shutter case 4 side (building side) However, the endurance time of the power supply 9 can be remarkably lengthened and Therefore, replacement and charging of the power source 9 can be dispensed with. Besides, the projector / receiver 7, It is necessary to bend the optical path between the eight by 90 degrees vertically and horizontally using a reflection plate as in the past. Instead, it can be directly performed by the light emitters / receivers 7 and 8 arranged in a straight line. It is extremely easy to adjust the optical axis, and it may be shaken by some vibration. Accurate sensing can be performed without any.       [0014]   In addition, the light emitters / receivers 7 and 8 are housed in a movable box 6 which can be retracted from the seat plate 5. Since it is configured, the light emitters / receivers 7, 8 are pushed up from below by the ground when fully closed. As a result, the optical path is lowered below the bottom surface of the seat plate. The seat plate 5 is formed without being disturbed by the light projecting / receiving devices 7 and 8 provided for forming the seat plate 5. The grounding of the seat plate 5 can be ensured, and the emitters / receivers 7 and 8 can be connected to the shutter curtain 1 It is protected without being damaged by the weight of. And this projector / receiver 7, In order to protect 8, the holes corresponding to the emitters and receivers 7 and 8 should be drilled in the ground and fully closed here. Immersion and protection may be possible, but in this case the holes are in the ground and therefore the mud. It is easy for dirt and pebbles to enter and get clogged. Although protection cannot be measured for a long time, the present invention does not have such a thing.       [0015]   In addition, since the light emitters / receivers 7 and 8 are disposed in the portion hidden by the guide rail 3, Although the light emitters / receivers 7 and 8 are projected downward from the lower surface of the seat plate 5, Under normal conditions will not be seen by people and will not be mischievous accordingly Thus, the protection of the light emitters / receivers 7 and 8 can be reliably measured.       [0016]   Further, the electric devices mounted on the seat plate 5 such as the light emitters / receivers 7 and 8 and the transmitter are , The switch 12 automatically switches when the shutter curtain 1 is at the upper and lower limits. When opened, the power to these electric devices is turned off, and the electric devices stop operating automatically. Therefore, it is possible to prevent wasteful consumption of the power source 9 and to make it more convenient. There is.       [0017]   [Effect]   In short, since the present invention is constructed as described above, the presence or absence of obstacles Is detected when the optical path running under the seat plate is blocked, and the shutter curtain Can be reliably stopped before touching an obstacle to prevent obstacle damage. The optical path for detecting obstacles is It becomes a light beam that runs between the light emitter and the light receiver installed in the It is completely unnecessary to use a reflector with a large light loss, and therefore accurate optical path adjustment is required. , The direct adjustment work of adjusting the mounting angle of the projector and receiver can be performed easily and securely. The light loss is extremely small and it is not acceptable for the projector side. It is possible to use a weak light quantity, and it is possible to use a light sensor with low sensitivity for accuracy. Highly sensitive obstacles can be detected.       [0018]   Moreover, since the light emitter / receiver projects below the bottom surface of the seat plate, when fully closed, The emitter and receiver will come into contact with the ground in advance, but at this time It will be pushed up and will be immersed in the seat. As a result, the seat plate is The light projecting and projecting light projecting downwards ensures that the ground can be securely grounded without any interference. It can be fully closed without any delay, and the emitter and receiver can be damaged by grounding the seat plate. Not to mention that reliable protection of the emitter and receiver can be achieved reliably over a long period of time. Become.       [0019]   Furthermore, since the light emitter / receiver is installed in the area hidden by the guide rail, This is the normal condition, even though the container projects downward from the bottom surface of the seat plate. There is no need for human eyes to see it, and there is no chance of being mischievous. This will ensure that the vessel is protected.

[Brief description of drawings] FIG. 1 is a front view of an electric shutter. FIG. 2 is an enlarged front view of a seat plate portion. FIG. 3 is a vertical sectional view of a seat plate. FIG. 4 is a chart of a sensing mechanism. [Explanation of symbols] 1 Shatter curtain 2 electric motor 3 guide rails 4 shutter case 5 seat plate 6 movable boxes 7 Floodlight 8 light receiver 9 power supplies 10 transmitter 11 receiver 12 switch

Claims (1)

[Claims for utility model registration] 1) In the electric shutter which is configured to drive the electric motor in response to a command from the lifting control mechanism to move the shutter curtain up and down while guiding the shutter curtain to the left and right guide rails, At the left and right ends of the bottom seat plate that are hidden by the guide rails, at the positions that project below the bottom surface of the seat plate so that the optical path is blocked before an obstacle that obstructs the descent of the shutter curtain contacts the seat plate. While a light transmitter and a light receiver are arranged, a transmitter for transmitting a stop signal to the receiver on the elevation control mechanism side by blocking the optical path, and a power supply for operating the transmitter and the light receiver are further provided on the seat plate. In addition, the light emitting and receiving device is further provided so as to be retractable with respect to the seat plate so that it can be retracted into the seat plate from the lower surface of the seat plate by being pushed up from below. Safety switch in the dynamic Shiyatsuta. 2) The safety of the electric shutter according to claim 1, characterized in that the light-emitter / receiver is provided with a switching switch for turning off the power in the upper limit state and the lower limit state of the shutter curtain. Switch.