JP5329953B2 - Electric shutter obstacle detection device and electric shutter equipped with obstacle detection device - Google Patents

Abstract

[PROBLEMS] To provide an obstacle detector of an electric shutter exhibiting high sensitivity and high operation reliability and not permitting blow-through of flame from one side to the other side of the shutter upon occurrence of a fire, and to provide an electric shutter equipped with such an obstacle detector. [MEANS FOR SOLVING PROBLEMS] The obstacle detector comprises a flexible edge member (24) fixed to the bottom edge of a shutter curtain (12) and extending substantially over the entire length thereof. In the vicinity of one end of the edge member, a laser beam projector (34) projecting a laser beam in the longitudinal direction of the edge member through a hollow space (30) defined by the edge member is arranged, and a photosensor (40) for receiving that laser beam is arranged in the vicinity of the other end of the edge member. When the edge member is deformed elastically by external force and crushed, the laser beam is intercepted by the edge member and prevented from entering the photosensor. The edge member is made of a flame retardant elastomer material.

Description

  The present invention relates to an obstacle detection device used for an electric shutter including a metal shutter curtain and an electric lifting mechanism for raising and lowering the shutter curtain. The present invention further relates to an electric shutter provided with such an obstacle detection device.

  An example of a shutter provided with a metal shutter curtain and an electric lifting mechanism for raising and lowering the shutter curtain is an electric winding shutter. The electric hoisting shutter is widely used as a fire prevention shutter in addition to being used as a shutter for closing an entrance of a building or a gate of a facility. In addition, many fire shutters in recent years are composed of an electric shutter combined with a fire sensor and an automatic operation device. If the fire sensor detects high temperature and / or smoke in the event of a fire, the electric shutter It operates automatically so that the shutter curtain descends.

  When using an electric shutter, in general, when a person is caught between the falling shutter curtain and the floor, when the lower edge of the falling shutter curtain comes into contact with an obstacle, It is desirable to equip the lower edge of the shutter curtain with an obstacle detection device so that the descent operation can be stopped. Such an obstacle detection device is particularly necessary for an automatically operated fire-proof shutter. Documents disclosing such an obstacle detection device used for an electric shutter include, for example, Japanese Patent Application Laid-Open No. 10-238261 and Japanese Patent Application Laid-Open No. 2000-54765.

Japanese Patent Laid-Open No. 10-238261 JP 2000-54765 A

  In the automatic operation type fireproof shutter, it is necessary to suppress the ascending / descending speed of the shutter curtain to a certain speed or less from the viewpoint of safety. However, the raising / lowering speed of the conventional fire shutter is slower than necessary, and its raising / lowering operation is too slow. However, in order to increase the ascending / descending speed of the fire shutter while ensuring safety, an obstacle detection device with higher sensitivity and higher operation reliability is required. On the other hand, the obstacle detection device for the fire shutter should not burn out in the event of a fire and allow the flame to blow through. Satisfying these requirements together has never been easier.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide high sensitivity and high operation reliability, and when applied to a fire shutter, one side of the fire shutter when a fire occurs. It is an object of the present invention to provide an obstacle detection device used for an electric shutter that does not allow a flame to blow from one side to the other side.

  It is a further object of the present invention to provide an electric shutter equipped with such an obstacle detection device.

In order to achieve this object, an obstacle detection device for a shutter according to the present invention includes a shutter curtain formed by connecting a plurality of metal slats in the vertical direction, and an electric lifting mechanism that lifts and lowers the shutter curtain. In the obstacle detection device used for the electric shutter, it is attached to the slat located at the lowermost stage of the shutter curtain, and extends substantially over the entire length of the lowermost slat so that the lower end edge of the shutter curtain. A flexible edge member made of a flame retardant elastomer material is attached and extends over substantially the entire length of the lower edge of the shutter curtain, the edge member being the lower edge of the lowermost slat A base that is attached in contact with the edge, and elastically deformable that is formed on the lower surface of the base so as to extend in the longitudinal direction of the base to define a hollow space A tubular portion, and a pair of elastically deformable wings formed over the entire length of the base so as to cover and cover the tubular portion from both sides on both sides of the lower end of the base, A light beam projecting means for projecting a light beam in the longitudinal direction of the edge member through the hollow space of the tubular part disposed in the vicinity of the one end, and disposed in the vicinity of the other end of the edge member; A light sensor that receives a light beam from the light beam projecting means through the hollow space, and the light beam of the light beam projecting means is crushed when the tubular portion is in a state of being crushed by elastic deformation by an external force. It is configured to be blocked by the edge member in a state and prevented from entering the optical sensor, and the edge member further includes a locking portion formed on an upper surface of the base portion, The upper surface of the base and the locking portion By fitting a pair of grooves formed between the bottom surface and a pair of edges of the bottom slat, the edge member is attached to the bottom slat, and the pair of wings are The base portion extends obliquely downward and outward and extends further below the lowermost portion of the tubular portion, and the pair of wing-like portions are in a state where the shutter curtain is completely lowered to the lower limit position. At one time, the downwardly extending end of each wing-like part is pressed against the floor surface so as to cover and cover the tubular part from both sides, and when the edge member is exposed to a high temperature at the time of fire occurrence The shutter curtain is configured to stick between the lower edge of the shutter curtain and the floor surface to maintain the portion in a sealed state .
Further, the present invention provides an obstacle detection apparatus for use in an electric shutter including a shutter curtain formed by connecting a plurality of metal slats in the vertical direction and an electric lifting mechanism for moving the shutter curtain up and down. It is attached to the slat located at the lowermost stage of the curtain and extends over substantially the entire length of the lowermost slat, so that it is attached to the lower edge of the shutter curtain and substantially the entire length of the lower edge of the shutter curtain. over in the extension and, and cross-sectional shape and elastically deformable edge member made of a flame retardant elastomeric material defining a hollow space by the U-shape, on both sides of the lowermost slat, said end Elasticity composed of a flame retardant elastomer material provided to extend over the entire length of the lowermost slat so as to cover and cover the edge member from both sides A light beam projecting means for projecting a light beam in a longitudinal direction of the edge member through a hollow space of the tubular portion disposed near one end of the edge member. An optical sensor that is disposed near the other end of the end edge member and receives a light beam from the light beam projection means through the hollow space of the tubular portion, and the tubular portion is elastically deformed and crushed by an external force. Each of the front edge members is configured so that the light beam of the light beam projecting means is blocked by the edge member in a collapsed state and prevented from entering the optical sensor when in the state. Each has a pair of first locking portions projecting inward from each other at both upper ends thereof, and between the inner surfaces of both upper ends of the respective edge members and the first locking portions. A pair of first grooves formed respectively are provided in the lowermost slurry. The end edge member is attached to the lowermost slat by being fitted to a pair of first edges respectively formed on both sides of the lower end portion of each of the ribs. A pair of second grooves respectively formed between the inner surface of the upper end of each wing-like member and the second locking portion. By fitting the pair of second edges formed on both sides of the lower end portion of the lowermost slat located above the first edge, the wing-like members are attached to the lowermost slat. The pair of wing-shaped members extends obliquely downward and outward from the lowermost slats and extends further below the lowermost portion of the edge member, and the pair of wing-shaped members are The shutter curtain is completely lowered to the lower limit position. The lower extended end of each wing-like member is pressed against the floor surface at a certain time so as to cover and cover the edge member from both sides , and the edge member is exposed to a high temperature at the time of fire. Further, it is configured such that the portion is stuck between the lower edge of the shutter curtain and the floor surface and the portion is maintained in a sealed state .

In addition, an electric shutter including the obstacle detection device according to the present invention includes a shutter curtain formed by connecting a plurality of metal slats in the vertical direction, an electric lifting mechanism for moving the shutter curtain up and down, and the electric shutter. A control device for controlling the operation of the lifting mechanism; and an obstacle detection device provided at a lower edge of the shutter curtain, the obstacle detection device being attached to a slat located at the lowest stage of the shutter curtain, A flame-retardant elastomeric material that extends over substantially the entire length of the lowermost slat, thereby being attached to the lower end edge of the shutter curtain and extending substantially the entire length of the lower end edge of the shutter curtain. And a base portion that is attached to a lower end edge of the lowermost slat; and the base portion. An elastically deformable tubular part formed on the lower surface extending in the longitudinal direction of the base part to define a hollow space, and the entire length of the base part so as to cover and cover the tubular part from both sides on both lower ends of the base part A pair of elastically deformable wings formed across the edge member and disposed in the vicinity of one end of the edge member and projecting a light beam in the longitudinal direction of the edge member through the hollow space of the tubular part And a light sensor disposed near the other end of the edge member and receiving a light beam from the light beam projecting means through the hollow space of the tubular part, the tubular part being subjected to an external force When in a collapsed state due to elastic deformation, the light beam of the light beam projecting means is blocked by the edge member in the collapsed state and prevented from entering the optical sensor. The edge member is Further comprising a locking portion formed on the upper surface of the base portion, and a pair of grooves formed between the upper surface of the base portion and the lower surface of the locking portion are fitted to a pair of edges of the lowermost slat Thus, the end edge member is attached to the lowermost slat, and the pair of wings extend obliquely downward and outward from the base and extend further below the lowermost part of the tubular part. The pair of wing-shaped portions are configured such that when the shutter curtain is completely lowered to the lower limit position, the lower extending ends of the wing-shaped portions are pressed against the floor surface, and the tubular portions are viewed from both sides. It is configured to cover and cover, and the edge member is stuck between the lower edge of the shutter curtain and the floor surface when exposed to a high temperature at the time of fire, and the part is maintained in a sealed state. The control device is configured to If the light beam incident on the optical sensor is interrupted during the descent operation, the shutter curtain descent operation is stopped or the shutter curtain is raised, and the blocked light beam is When the light enters the optical sensor, the descent operation of the shutter curtain is resumed.
In addition, an electric shutter including the obstacle detection device according to the present invention includes a shutter curtain formed by connecting a plurality of metal slats in the vertical direction, an electric lifting mechanism for moving the shutter curtain up and down, and the electric shutter. A control device for controlling the operation of the lifting mechanism; and an obstacle detection device provided at a lower edge of the shutter curtain, the obstacle detection device being attached to a slat located at the lowest stage of the shutter curtain, said by extending over substantially the entire length of the lowermost slat, attached to the lower edge of the shutter curtain and extend over substantially the entire length of the lower edge of the shutter curtain, and the cross-sectional shape U An elastically deformable edge member made of a flame retardant elastomer material that defines a hollow space by forming a letter shape, and on both sides of the lowermost slat, A pair of elastically deformable wing-like members made of a flame-retardant elastomer material provided to extend over the entire length of the lowermost slat so as to cover and cover the edge member from both sides, A light beam projecting means disposed near one end of the edge member and projecting a light beam in the longitudinal direction of the edge member through the hollow space of the tubular portion, and disposed near the other end of the edge member; A light sensor that receives a light beam from the light beam projection means through the hollow space of the tubular portion, and the light beam of the light beam projection means is in a state where the tubular portion is elastically deformed and crushed by an external force. Is blocked by the edge member in a collapsed state and prevented from entering the optical sensor, and the front edge members protrude inward from each other at both upper ends thereof. A pair of first locks And a pair of first grooves respectively formed between the inner surfaces of both upper ends of the respective edge members and the first locking portions, on both sides of the lower end portion of the lowermost slat. The end edge member is attached to the lowermost slat by being fitted to the formed pair of first edges, and each wing-like member protrudes inwardly at the upper end edge thereof. A pair of second grooves formed between the inner surface of the upper end of each of the wing-shaped members and the second locking portion, respectively, above the first edge. The wing-like members are attached to the lowermost slats by being fitted to a pair of second edges respectively formed on both sides of the lower end portion of the lowermost slat. The end member extends obliquely downward and outward from the lowermost slat to extend the end. The pair of wing members extends further below the lowermost portion of the edge member, and when the shutter curtain is completely lowered to the lower limit position, the lower extending end of each wing member is a floor. And is configured to cover and cover the edge member from both sides, and the edge member is disposed between the lower edge of the shutter curtain and the floor surface when exposed to a high temperature during a fire. The controller is configured to adhere and maintain the portion in a sealed state, and the control device is configured to release the shutter curtain if the light beam incident on the optical sensor is interrupted during the lowering operation of the shutter curtain. The descent operation of the shutter curtain is stopped or the shutter curtain is raised, and the descent operation of the shutter curtain is resumed when the blocked light beam is incident on the optical sensor again. Characterized in that it is configured to.

  According to the present invention, since the obstacle detection device for the electric shutter detects the elastic deformation of the edge member attached to the lower edge of the shutter curtain by blocking the light beam, it has a very high sensitivity. And operational reliability is high. Moreover, since the edge member has a high degree of flame retardancy and is fixed to the lower edge of the shutter curtain without igniting when exposed to high temperatures at the time of the fire, the lower edge of the shutter curtain and the floor surface The portion of the shutter is kept in a sealed state, so that it is not allowed to blow through the flame from one side of the shutter to the other side in the event of a fire.

BRIEF DESCRIPTION OF THE DRAWINGS It is the figure which showed the preferred embodiment of this invention, A is a front view of the electrically driven winding shutter provided with the obstacle detection apparatus, B is the side view, C is the cross-sectional plane along the CC line FIG. A is a cross-sectional view of the lower edge of the shutter curtain shown in FIG. 1 and an edge member attached thereto, and B is a view similar to A, but the shutter curtain is completely lowered (to the lower limit position). It is the figure which showed the state at the time. It is the expansion partial front view which showed the part of the one end of the lower end edge of the shutter curtain shown in FIG. It is the expansion partial front view which showed the part of the other end of the lower end edge of the shutter curtain shown in FIG. It is sectional drawing which showed the lower end edge of the shutter curtain which concerns on the example of a change, and the edge member which concerns on the example of a change attached there, The figure when the shutter curtain was fully lowered | hung (to a lower limit position) It is.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Electric winding shutter 12 ... Shutter curtain 14 ... Shutter box 21 ... Control device 22 ... Slat 24 ... Edge member 28 ... Tubular part of edge member 30 ... Hollow space 32 ... End Edge member wings 34 …… Laser beam ejector (light beam projection means)
40 …… Optical sensor 52 …… Slat 54 …… Edge member 55 …… Winged member 56 …… Hollow space

  Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a view showing a preferred embodiment of the present invention. A is a front view of an electric hoisting shutter 10 provided with an obstacle detection device, B is a side view thereof, and C is a CC line thereof. FIG. As shown in FIGS. 1A to 1C, the electric hoisting shutter 10 extends vertically to a shutter curtain 12, a shutter box 14 fixedly attached to the building, and a pair of vertically attached fixedly to the building. The support 16 is provided. The pair of support columns 16 are made of hollow steel columns, and a pair of vertically extending guide rails 18 are accommodated in the support columns 16.

  The electric hoisting shutter 10 further includes an electric elevating mechanism (winding mechanism) 20 that winds and rewinds the shutter curtain 12 and moves the shutter curtain 12 up and down. The electric elevating mechanism 20 includes a shutter. Housed in a box 14. The electric hoisting shutter 10 further includes a control device 21 that controls the operation of the electric lifting mechanism 20. The control device 21 includes a microcomputer for controlling the power supplied to the electric lifting mechanism 20 and the power. An electronic circuit 21a composed of a control element, an operation terminal 21b for an operator to input a command to the electronic circuit 21a, and a fire sensor 21c composed of a temperature sensor and / or a smoke detection sensor are included. (The electronic circuit 21a, the operation terminal 21b, and the fire sensor 21c are schematically shown in the figure).

  The shutter curtain 12 is configured by vertically connecting a plurality of metal slats 22 extending in the horizontal direction, like the shutter curtains of many conventional winding shutters. However, in many conventional shutter curtains of the winding shutter, steel plate slats are used, whereas the slats 22 of the shutter curtain 12 in the illustrated example have a certain cross-sectional shape manufactured by extrusion. It consists of an aluminum alloy profile material. However, this is not an indispensable requirement for carrying out the present invention, and the present invention can also be applied to an electric hoisting shutter having a shutter curtain using a steel plate slat. The present invention can also be applied to these types of electric shutters.

  A flexible edge member 24 made of a flame-retardant elastomer material, which is a constituent element of the obstacle detection device according to the present invention, is attached to the lower edge of the shutter curtain 12. This edge member Reference numeral 24 denotes a substantially entire length of the lower end edge of the shutter curtain 12. Since both side edges of the shutter curtain 12 are accommodated inside the hollow support column 16, the end edge member 24 does not need to extend to the side edges of the both side edges of the shutter curtain 12, and at least the support column 16. It only needs to extend over a range exposed to the outside. The flame-retardant elastomer material that is a material for producing the edge member 24 has a property of adhering to the lower edge of the shutter curtain 12 without being ignited when exposed to a high temperature during a fire. Suitable flame retardant elastomeric materials having properties include chlorobrene rubber and silicone rubber.

  2A is a sectional view of the lower edge of the shutter curtain 12 and the edge member 24 attached thereto, and B is a view similar to A, but the shutter curtain 12 is completely lowered (to the lower limit position). It is the figure which showed the state when being done. 3 and 4 are enlarged partial front views showing one end and the other end of the lower end edge of the shutter curtain 12, respectively. In these drawings, a part of the lowermost slat 22 of the shutter curtain 12 is shown. It is shown. The edge member 24 attached to the slat 22 is an elongate member made of a profile material having a constant cross-sectional shape manufactured by extrusion molding, and has a unique cross-sectional shape as shown in the figure.

  As shown in FIGS. 2A and 2B, the edge member 24 includes a base portion 25 that is attached in contact with the lowermost slat 22 of the shutter curtain 12, and a locking portion 26 formed on the upper surface of the base portion 25. The pair of edges of the slat 22 are fitted into a pair of grooves formed between the upper surface of the base portion 25 and the lower surface of the locking portion 26, so that the edge member 24 is attached to the slat 22. Installed.

  The edge member 24 further has a tubular portion 28 formed below the base portion 25. The tubular portion 28 has a semi-cylindrical lower wall, has a semicircular cross-sectional shape that bulges downward, and a hollow space 30 extending in the longitudinal direction of the edge member 24 therein. It is defined.

  The edge member 24 further has a pair of wing-like portions 32 formed on both sides of the tubular portion 28. The pair of wing portions 32 extends obliquely downward and outward from the base portion 25 and extends further below the lowermost portion of the tubular portion 28, and the wing portions 32 are formed by the shutter curtain 12 completely. 2 (to the lower limit position) (see B in FIG. 2) so as to cover and cover the tubular portion 28. According to this configuration, if a fire occurs and the shutter curtain 12 is lowered, the wing-like portion 32 prevents the tubular portion 28 from being damaged by the heat of the fire. The wall thickness of the portion 28 can be reduced.

  When the shutter curtain 12 reaches the upper limit position when the shutter curtain 12 is raised, the electric hoisting shutter 10 stops raising, and when the shutter curtain 12 is lowered, the shutter curtain 12 is moved. Is provided with a limit mechanism (not shown) for stopping the descent when it reaches the lower limit position. This limit mechanism is electrically connected to the control device 21 (see B in FIG. 1). When the shutter curtain 12 reaches the upper limit position and the lower limit position, an electric signal indicating that the position has been reached is sent. The data is sent to the control device 21. Since the limit mechanism having such a function is generally equipped in various conventional electric winding shutters, it is not shown in detail here. Further, in the illustrated electric winding shutter 10, when the shutter curtain 12 is at its lower limit position, the position of the floor surface relative to the shutter curtain 12 is indicated by reference numerals B, 3 and 4 in FIG. In other words, a small gap is present between the floor surface FL and the lower surface of the tubular portion 28 of the end edge member 24.

  In general, when the shutter curtain 12 is completely lowered, the position of the floor surface FL may be substantially aligned with the position of the lower surface of the tubular portion 28 of the edge member 24. . Accordingly, as shown in the illustrated example, when the shutter curtain 12 is in its lower limit position, a small gap exists between the floor surface and the lower surface of the tubular portion 28 of the edge member 24. This is not an essential requirement for implementation, and the lower surface of the tubular portion 28 may be in contact with the floor surface, and the gap between the two may be somewhat large. Importantly, when the shutter curtain 12 is in a fully lowered state, the lower edge of the wing 32 is in firm contact with the floor surface FL, covering the tubular portion 28 and covering it. Is to do.

  However, if the relative position of the illustrated example is adopted, the tubular portion 28 of the edge member 24 does not contact the floor surface FL, and thus the state in which the shutter curtain 12 is completely lowered for a long time or a long time continues. Even in this case, there is an advantage that creep does not occur on the semi-cylindrical lower wall of the tubular portion 28.

  At one end of the lower edge of the shutter curtain 12 shown in FIG. 3, a laser beam emitter 34 as light beam projection means is disposed in the vicinity of one end of the edge member 24, and this laser beam generation is performed. The device 34 is attached to the lowermost slat 22 of the shutter curtain 12 via a bracket 36. The laser beam ejector 34 is a small device using a laser diode, and is disposed so as to project a laser beam 38 in the longitudinal direction of the edge member 24 through the hollow space 30 of the edge member 24.

  In the other end portion of the lower end edge of the shutter curtain 12 shown in FIG. 4, an optical sensor 40 is disposed in the vicinity of the other end of the end edge member 24, and the optical sensor 40 is connected to the shutter via a bracket 42. A lower slat 22 of the curtain 12 is attached. The optical sensor 40 is arranged to receive the laser beam 38 from the laser beam emitter 34 through the hollow space 30 of the edge member 24.

  If an obstacle such as a human body is sandwiched between the lower end edge of the descending shutter curtain 12 and the floor surface FL during the lowering operation of the electric hoisting shutter 10, the external force applied from the obstacle For this reason, the lower wall of the tubular portion 28 of the edge member 24 is elastically deformed, and the tubular portion 28 is crushed at the place where the obstacle comes into contact. When the tubular portion 28 is crushed, the laser beam 38 projected from the laser beam emitter 34 is blocked by the tubular portion 28 and prevented from entering the optical sensor 40.

  The laser beam emitter 34 and the optical sensor 40 are electrically connected to the control device 21 (see B in FIG. 1). At the start of the descent operation of the shutter curtain 12, the control device 21 activates the laser beam emitter 34 to start projecting the laser beam 38 and starts monitoring the output of the optical sensor 40. Then, the control device 21 controls the electric lifting mechanism 20 if the laser beam 38 incident on the optical sensor 40 during the lowering operation of the shutter curtain 12 is interrupted and the light reception output of the optical sensor 40 disappears. Then, the descent operation of the shutter curtain 12 is stopped, and then the descent operation of the shutter curtain 12 is resumed when the interrupted laser beam 38 comes into the optical sensor again.

  Alternatively, the control device 21 may be configured so that the laser beam 38 incident on the optical sensor 40 during the lowering operation of the shutter curtain 12 is interrupted and the received light output of the optical sensor 40 disappears. The shutter curtain 12 may be raised by controlling 20 and then the lowering operation of the shutter curtain 12 may be resumed if the blocked laser beam 38 is incident on the optical sensor again.

  Further, when the shutter curtain 12 is lowered to the lower limit position, the control device 21 receives a signal indicating that from the limit mechanism described above, and ends the lowering operation of the shutter curtain 12 in response to the signal. The beam ejector 34 is deactivated, and the monitoring of the output of the optical sensor 40 is terminated.

  The obstacle detection device described above is a conventional obstacle in which the displacement generated when the movable member attached to the lower edge of the shutter curtain comes into contact with the obstacle is transmitted to the electric switch by a mechanical link mechanism. Compared with the detection device, it is very sensitive and has high operational reliability. This obstacle detection device further improves the detection sensitivity by making the lower wall of the tubular portion 28 of the edge member 24 made of an elastomer material thinner so that elastic deformation of the lower wall occurs more easily. Can be made. When this obstacle detection device is applied to a fire shutter, the edge member 24 should not burn out and a flame from one side of the shutter to the other side should not blow through in the event of a fire. Since the edge member 24 includes a pair of wings 32 covering and covering the tubular portion 28, no matter how thin the lower wall of the tubular portion 28 is, the wings 32 can prevent such a flame from being blown through. Is prevented. That is, the material of the edge member 24 is fixed to the lower edge of the shutter curtain without igniting when exposed to a high temperature at the time of fire. It firmly adheres between the floor and the floor surface to maintain that portion in a sealed state, and to prevent a flame from blowing from one side of the shutter to the other.

  FIG. 5 is a cross-sectional view showing an edge member 54 according to a modified example, a pair of wing-shaped members 55, and a lower edge of the lowermost slat 52 of the shutter curtain according to the modified example to which they are attached. The state when the shutter curtain is completely lowered (to the lower limit position) is shown. The slat 52 is configured in the same manner as the slat 22 described above except that the cross-sectional shape of the lower end edge thereof is a shape suitable for attaching the end edge member 54 and the pair of wing-like members 55. . The edge member 54 and the pair of wing-like members 55 are flexible members made of a flame-retardant elastomer material, like the edge member 24 described above, and they are the lower edge of the shutter curtain. Extends substantially over the entire length. In addition, the flame-retardant elastomer material that is a material for manufacturing the edge member 54 and the pair of wing members 55 is exposed to a high temperature during a fire, similarly to the flame-retardant elastomer material that is a material for manufacturing the edge member 24. When fired, it has the property of adhering to the lower edge of the shutter curtain without igniting, and as a suitable flame retardant elastomer material having such a property, as described above, chlorobrene rubber or silicone There is rubber.

  The edge member 54 is a long member made of a profile material having a constant cross-sectional shape manufactured by extrusion molding. The pair of wing members 55 is also a long member made of a profile material having a constant cross-sectional shape manufactured by extrusion molding.

  The end edge member 54 has a U-shaped cross-section, and defines a hollow space 56 extending in the longitudinal direction of the end edge member 54 therein. The end edge member 54 has a pair of engaging portions 58 attached to the upper end of the end edge member 54 while engaging with the lower end edge of the shutter curtain. The hollow space 56 defined by the end edge member 54 performs the same function as the hollow space 30 defined by the end edge member 24 described above.

  The pair of wing members 55 are arranged on both sides of the edge member 54 and extend in parallel with the edge member 54. In addition, each of the pair of wing-like members 55 has a locking portion 60 that is locked and attached to the lower end edge of the shutter curtain at the upper end edge thereof. Further, the pair of wing members 55 are formed so as to cover and cover the edge member 54 when the shutter curtain is completely lowered (to the lower limit position). According to this configuration, if a fire occurs and the shutter curtain is completely lowered, the wing-like member 55 prevents the edge member 54 from being damaged by the heat of the fire. In the same manner as in the configuration shown in FIGS. 1 and 2, the wall thickness of the end member 54 can be reduced, and the detection sensitivity can be further improved.

  Even when the slat 52, the edge member 54, and the pair of wing members 55 shown in FIG. 5 are used in place of the slat 22 and the edge member 24 shown in FIGS. There is no particular change in the function and effect. The main difference between the two is the production effort and cost, but in these respects, either the configuration shown in FIGS. 2A and 2B or the configuration shown in FIG. 5 is excellent. It depends on the individual application and design.

Claims (8)

In an obstacle detection device used for an electric shutter including a shutter curtain formed by connecting a plurality of metal slats in the vertical direction and an electric lifting mechanism for moving the shutter curtain up and down,
It is attached to the slat located at the lowermost stage of the shutter curtain and extends over substantially the entire length of the lowermost slat so that it is attached to the lower edge of the shutter curtain and is substantially the lower edge of the shutter curtain. A flexible edge member made of a flame retardant elastomeric material extending over the entire length ,
The edge member is a base portion that is attached in contact with a lower end edge of the lowermost slat; and an elastically deformable portion that is formed on the lower surface of the base portion so as to extend in the longitudinal direction of the base portion to define a hollow space. A tubular portion and a pair of elastically deformable wings formed over the entire length of the base so as to cover and cover the tubular portion from both sides on both sides of the lower end of the base,
A light beam projecting means for projecting a light beam in the longitudinal direction of the edge member through the hollow space of the tubular portion disposed near one end of the edge member;
An optical sensor disposed near the other end of the edge member and receiving a light beam from the light beam projection means through the hollow space of the tubular portion;
When the tubular portion is elastically deformed by an external force and crushed, the light beam of the light beam projecting means is blocked by the edge member in the crushed state and enters the optical sensor. Configured to be disturbed,
The edge member further includes a locking portion formed on the top surface of the base portion, and a pair of grooves formed between the top surface of the base portion and the bottom surface of the locking portion are formed on the bottom slat. By fitting a pair of edges, the edge member is attached to the lowermost slat,
The pair of wings extends obliquely downward and outward from the base and extends further below the lowermost part of the tubular part,
The pair of wing portions covers the tubular portion from both sides so that the lower extending end of each wing portion is pressed against the floor surface when the shutter curtain is completely lowered to the lower limit position. is configured to,
The edge member is configured to adhere between the lower edge of the shutter curtain and the floor surface when exposed to a high temperature at the time of a fire, and to maintain the portion in a sealed state.
An obstacle detection device for an electrically operated shutter. In an obstacle detection device used for an electric shutter including a shutter curtain formed by connecting a plurality of metal slats in the vertical direction and an electric lifting mechanism for moving the shutter curtain up and down,
It is attached to the slat located at the lowermost stage of the shutter curtain and extends over substantially the entire length of the lowermost slat so that it is attached to the lower edge of the shutter curtain and is substantially the lower edge of the shutter curtain. and extending to, and cross-sectional shape becomes a flame retardant elastomeric material defining a hollow space by the U-shaped elastically deformable edge member over the s entire length,
Extending in parallel with the edge member over the entire length of the lowermost slat so as to cover and cover the edge member from both sides of the lowermost slat. A pair of elastically deformable wing-shaped members,
A light beam projecting means for projecting a light beam in the longitudinal direction of the edge member through the hollow space of the tubular portion disposed near one end of the edge member;
An optical sensor disposed near the other end of the edge member and receiving a light beam from the light beam projection means through the hollow space of the tubular portion;
When the tubular portion is elastically deformed by an external force and crushed, the light beam of the light beam projecting means is blocked by the edge member in the crushed state and enters the optical sensor. Configured to be disturbed,
Each front edge member has a pair of first locking portions projecting inward from each other at both upper ends thereof, and the inner surfaces of both upper ends of the respective edge members and the first locking members The pair of first grooves respectively formed between the first and second portions are respectively fitted to a pair of first edges formed on both sides of the lower end of the lowermost slat, whereby the edge member is Mounted on the bottom slat,
Each of the wing-shaped members has a second locking portion projecting inwardly at an upper edge of the wing-shaped member, and is provided between the inner surface of the upper end of each wing-shaped member and the second locking portion. A pair of second grooves respectively formed on the lower edge portion of the lowermost slat at a position above the first edge and fitted to a pair of second edges respectively Each wing member is attached to the lowermost slat,
The pair of wing-like members extend obliquely downward and outward from the lowermost slat and extend further below the lowermost portion of the edge member,
The pair of wing members cover the edge member from both sides so that the lower extending ends of the wing members are pressed against the floor surface when the shutter curtain is completely lowered to the lower limit position. is configured to,
The edge member is configured to adhere between the lower edge of the shutter curtain and the floor surface when exposed to a high temperature at the time of a fire, and to maintain the portion in a sealed state.
It is configured,
An obstacle detection device for an electrically operated shutter.   3. The obstacle detection device for an electric shutter according to claim 1, wherein the flame retardant elastomer material is made of chlorobrene rubber.   The obstacle detection device for an electric shutter according to claim 1, wherein the flame retardant elastomer material is made of silicone rubber. A shutter curtain formed by connecting a plurality of metal slats in the vertical direction;
An electric lifting mechanism for lifting and lowering the shutter curtain;
A control device for controlling the operation of the electric lifting mechanism;
An obstacle detection device equipped at the lower edge of the shutter curtain,
The obstacle detection device is:
It is attached to the slat located at the lowermost stage of the shutter curtain and extends over substantially the entire length of the lowermost slat so that it is attached to the lower edge of the shutter curtain and is substantially the lower edge of the shutter curtain. A flexible edge member made of a flame retardant elastomeric material extending over the entire length ,
The edge member is a base portion that is attached in contact with a lower end edge of the lowermost slat; and an elastically deformable portion that is formed on the lower surface of the base portion so as to extend in the longitudinal direction of the base portion to define a hollow space. A tubular portion and a pair of elastically deformable wings formed over the entire length of the base so as to cover and cover the tubular portion from both sides on both sides of the lower end of the base,
A light beam projecting means for projecting a light beam in the longitudinal direction of the edge member through the hollow space of the tubular portion disposed near one end of the edge member;
An optical sensor disposed near the other end of the edge member and receiving a light beam from the light beam projection means through the hollow space of the tubular portion;
When the tubular portion is elastically deformed by an external force and crushed, the light beam of the light beam projecting means is blocked by the edge member in the crushed state and enters the optical sensor. Configured to be disturbed,
The edge member further includes a locking portion formed on the top surface of the base portion, and a pair of grooves formed between the top surface of the base portion and the bottom surface of the locking portion are formed on the bottom slat. By fitting a pair of edges, the edge member is attached to the lowermost slat,
The pair of wings extends obliquely downward and outward from the base and extends further below the lowermost part of the tubular part,
The pair of wing portions covers the tubular portion from both sides so that the lower extending end of each wing portion is pressed against the floor surface when the shutter curtain is completely lowered to the lower limit position. Configured as
The edge member is configured to adhere between the lower edge of the shutter curtain and the floor surface when exposed to a high temperature at the time of a fire, and to maintain the portion in a sealed state.
If the light beam that has been incident on the optical sensor is interrupted during the lowering operation of the shutter curtain, the control device stops the lowering operation of the shutter curtain or raises the shutter curtain to be interrupted. The descent operation of the shutter curtain is resumed when the light beam that has been incident on the light sensor again.
An electric shutter equipped with an obstacle detection device. A shutter curtain formed by connecting a plurality of metal slats in the vertical direction;
An electric lifting mechanism for lifting and lowering the shutter curtain;
A control device for controlling the operation of the electric lifting mechanism;
An obstacle detection device equipped at the lower edge of the shutter curtain,
The obstacle detection device is:
It is attached to the slat located at the lowermost stage of the shutter curtain and extends over substantially the entire length of the lowermost slat so that it is attached to the lower edge of the shutter curtain and is substantially the lower edge of the shutter curtain. and extending to, and cross-sectional shape becomes a flame retardant elastomeric material defining a hollow space by the U-shaped elastically deformable edge member over the s entire length,
Extending in parallel with the edge member over the entire length of the lowermost slat so as to cover and cover the edge member from both sides of the lowermost slat. A pair of elastically deformable wing-shaped members,
A light beam projecting means for projecting a light beam in the longitudinal direction of the edge member through the hollow space of the tubular portion disposed near one end of the edge member;
An optical sensor disposed near the other end of the edge member and receiving a light beam from the light beam projection means through the hollow space of the tubular portion;
When the tubular portion is elastically deformed by an external force and crushed, the light beam of the light beam projecting means is blocked by the edge member in the crushed state and enters the optical sensor. Configured to be disturbed,
Each front edge member has a pair of first locking portions projecting inward from each other at both upper ends thereof, and the inner surfaces of both upper ends of the respective edge members and the first locking members The pair of first grooves respectively formed between the first and second portions are respectively fitted to a pair of first edges formed on both sides of the lower end of the lowermost slat, whereby the edge member is Mounted on the bottom slat,
Each of the wing-shaped members has a second locking portion projecting inwardly at an upper edge of the wing-shaped member, and is provided between the inner surface of the upper end of each wing-shaped member and the second locking portion. A pair of second grooves respectively formed on the lower edge portion of the lowermost slat at a position above the first edge and fitted to a pair of second edges respectively Each wing member is attached to the lowermost slat,
The pair of wing-like members extend obliquely downward and outward from the lowermost slat and extend further below the lowermost portion of the edge member,
The pair of wing members cover the edge member from both sides so that the lower extending ends of the wing members are pressed against the floor surface when the shutter curtain is completely lowered to the lower limit position. Configured to
The edge member is configured to adhere between the lower edge of the shutter curtain and the floor surface when exposed to a high temperature at the time of a fire, and to maintain the portion in a sealed state.
If the light beam that has been incident on the optical sensor is interrupted during the lowering operation of the shutter curtain, the control device stops the lowering operation of the shutter curtain or raises the shutter curtain to be interrupted. The descent operation of the shutter curtain is resumed when the light beam that has been incident on the light sensor again.
An electric shutter equipped with an obstacle detection device.   7. The electric shutter equipped with an obstacle detection device according to claim 5, wherein the flame retardant elastomer material is made of chlorobrene rubber.   The electric shutter equipped with an obstacle detection device according to claim 5 or 6, wherein the flame-retardant elastomer material is made of silicone rubber.

Images