JP4524782B2 - Self-weight drop shutter device - Google Patents

Description

  In the present invention, the brake device constituting the switch is in a braking state based on the deformation of the brake lever that is installed in the entrance / exit of a building, a passage, etc., and interlocks with the operation of an abnormality detector such as a fire detector or smoke detector Belongs to the technical field of a self-weight descent shutter device configured to switch to a released state and to drop by its own weight.

In general, this kind of building shutter device is equipped with an abnormal closure device with a means for changing the brake lever linked to the switch from the braking posture to the release posture, and an abnormality detection signal from the disaster prevention panel. A disaster prevention type having a function of preventing fire burning by, for example, forming a fire prevention compartment by lowering the shutter curtain by its own weight with the brake lever being released by the input of the above is known.
As a transformation means of the abnormal closing device, conventionally, the brake lever is braked on the basis of winding and winding the wire connected to the brake lever by a winding machine that rotates forward and reverse by an electric motor drive. Some are configured to transform into a posture and a release posture. In this configuration, when the shutter curtain is lowered by its own weight, it is configured to close only while the wire is being wound, so it is necessary to continuously supply power to the winding machine to maintain the winding state of the wire. .
By the way, the disaster prevention panel outputs an abnormality detection signal to the closing device at the time of abnormality, and the transformation means is operated based on the output, but the disaster prevention panel outputs a continuous signal for continuous current supply. There are a variety of devices and a device that outputs a single signal for supplying a current for a predetermined time set in advance. On the other hand, in the case where the deforming means of the abnormal closure device is the winding machine type as described above, continuous power supply is required, and therefore it is possible to cope with any disaster prevention panel. For this purpose, it is necessary to separately provide a battery for driving the electric motor on the shutter device side, which not only has the problem of increasing the number of parts, but also requires constant check of battery consumption, which is cumbersome to maintain. Such problems arise.

Therefore, as a means for changing the abnormality closing device, the first solenoid is excited by the input of a single abnormality detection signal, and the first plunger changes the brake lever to the released posture and holds the posture. One using a self-holding solenoid is proposed.
JP 2002-168076 A

  However, since the conventional device uses a self-holding solenoid, it is necessary to return the brake lever from the released posture to the braking posture. And in the said conventional thing, the 2nd plunger which displaces based on the obstacle detection signal being input from the shutter device together with the first plunger which receives the abnormality detection signal is provided, and the second plunger is the obstacle. The first and second plungers are linked so as to return the first plunger to the original position by displacing the object detection signal. However, in this case, when the obstacle is detected during the process of lowering the weight of the shutter curtain (in the middle), the first plunger returns to the original position. There is a problem that power supply such as an abnormality detection signal is required for the first solenoid again, and there is a problem to be solved by the present invention.

SUMMARY OF THE INVENTION The present invention was created in view of the above circumstances and has been created for the purpose of solving these problems. The invention of claim 1 is directed to releasing the brake lever interlocked with the switch from the braking position. In the self-weight drop type shutter device that changes its shape to its own weight and lowers the shutter curtain by its own weight, the abnormal-time closing device that switches the brake lever to the release position when the abnormality detection signal is input from the disaster prevention panel is excited by the input of the abnormality detection signal. Self-holding type comprising a deforming means having a plunger that switches the brake lever from the non-operating position to the operating position by a solenoid that switches the brake lever to the release position, and holds the displacement of the plunger to the operating position and then, reverse current supply times to displace the non-acting position from the acting position of the plunger by supplying a reverse current from the power source for driving the opener to the solenoid Connect, with a fully closed state of the shutter curtain is configured to return the brake lever in the braking position, said Hensugata means, varying the brake lever to the braking position and the releasing position through the second Hensugata means A second solenoid that is excited by detecting an obstacle in the shutter curtain, and the second solenoid is moved from the non-operating position to the operating position by the excitation of the second solenoid, so that the brake lever is released from the released position. This is a self-weight drop type shutter device configured by a second plunger that is transformed into a braking posture .
According to a second aspect of the present invention, in the first aspect, the deforming means and the second deforming means are connected via a connecting member, and the connecting member has a plunger in a non-operating position, and the second A first posture in which the plunger is in an operating position and a brake lever in a braking posture; a second posture in which the plunger is in an operating position and allows the brake lever to be deformed without interfering with the displacement of the second plunger; As a process of transformation from the working position to the non-acting position side, it is configured to change to a third posture that can be changed to the first posture with the displacement of the second plunger from the non-operating position to the working position. It is a self-weight descent shutter device.
According to a third aspect of the present invention, in the first or second aspect , the plunger is configured such that a reverse current is supplied based on the position detection before full closing when the shutter curtain reaches a position slightly before the fully closed state. It is a self-weight drop type shutter device.
According to a fourth aspect of the present invention, in the third aspect of the present invention, in the third aspect , in the process of lowering the dead weight of the shutter curtain, the plunger takes the connecting member in the third posture by detecting the position before full closing, It is a self-weight drop type shutter device configured to return the connecting member to the first posture by the displacement and return the brake lever to the braking posture.

According to the first aspect of the present invention, a separate power source is not required, and the plunger can be held in the operating position even if the abnormality detection signal from the disaster prevention panel is not a continuous output, and the shutter Since the plunger can be returned to its original non-operating position when the curtain is fully closed, maintenance can be performed with good workability and the weight of the shutter curtain is lowered after detecting an obstacle during the process of lowering the weight of the shutter curtain. Can be resumed automatically.
According to the invention of claim 2 or 3 , until the shutter curtain is fully closed, the weight drop automatically restarts after detecting the obstacle, and when the shutter curtain is fully closed, the shutter curtain is closed in an abnormal state. The device can be returned to the original state.
According to the invention of claim 4 , the obstacle closing device can be reliably detected in the process of lowering the dead weight of the shutter curtain, but the shutter closing device can be returned to the original state when the shutter curtain is fully closed. It has a function and can be made into an abnormal closing device with good operability.

Next, embodiments of the present invention will be described with reference to the drawings.
In the drawings, reference numeral 1 denotes a self-weight drop type shutter device installed in an opening such as a passage or an entrance, and a shutter curtain 2 constituting the shutter device 1 is a winding drum (not shown) built in a shutter case 3. It is wound around. Then, when the winding drum rotates forward and backward based on forward / reverse driving of the opening / closing machine 4 housed in the shutter case 3, the shutter curtain 2 has guide rails whose both side edges are erected on both the left and right sides of the opening. 5 is wound and unwound while receiving the movement guide, and is configured to move up and down between a fully closed position in which the opening is fully closed and a fully open position in which the opening is fully opened, thereby opening and closing the opening. These configurations are the same as the conventional configurations.

  In the present embodiment, the opening / closing machine 4 is configured electrically, and includes an electric motor with a speed reducer, a speed governor, and a brake device (all not shown). And the opening / closing machine 4 opens and closes the shutter curtain 2 by outputting the driving force decelerated by the speed reducer in accordance with releasing the braking of the brake device and driving the electric motor forward and backward. Thus, when the shutter curtain 2 is stopped, etc., the weight reduction of the shutter curtain 2 is regulated based on the braking operation of the brake device.

  In addition, a control unit 6 for controlling the driving of the opening / closing device 4 is provided in the shutter case 3. The control unit 6 includes an upper limit detection switch LSU that is provided in the opening / closing device 4 and is switched when the shutter curtain 2 is in the fully open position, and a lower limit detection that is switched when the shutter curtain is slightly moved to the fully closed position. Various detection signals such as a switch LSD are input. In this case, a reception control unit 6a is further connected. The reception control unit 6a includes a switch PBU, PBD, PBS for opening, closing, and stopping the operation switch 7 attached to the opening, and a seat plate 2a at the lowermost end of the shutter curtain 2 on the floor or an obstacle. An obstacle detection switch 8 or the like that is switched by contact is connected, and an opening command signal, a closing command signal, a stop command signal, an obstacle detection signal, and the like from these are sent to the control unit 6 via the reception control unit 6a. Is set to be input.

  And the control part 6 is an open command signal, a close command signal, a stop command signal, an upper limit detection signal, a lower limit detection signal, an obstacle detection signal, etc. which are input from various switches PBU, PBD, PBS, LSU, LSD, 8 etc. Is set to control the opening / closing of the shutter curtain 2. Incidentally, the opening / closing control by the control unit 6 has a conventional control configuration, and a detailed description thereof is omitted here.

  The obstacle detection switch 8 is a so-called seat plate switch disposed on a seat plate 2a provided at the lowermost end of the shutter curtain 2. The obstacle detection switch 8 according to the present embodiment is configured such that the shutter curtain 2 is an obstacle. The switch is made by abutting against an object and the seat plate 2a relatively moving up. The lead wire 8a drawn out from the obstacle detection switch 8 is wound around a cord reel 8b provided in the shutter case 3, and is wound around the cord reel 8b as the shutter curtain 2 opens and closes. The lead wire 8a wound around the cord reel 8b is connected and wired to the reception control unit 6a.

In the opening / closing control based on the control unit 6, the brake device provided in the opening / closing machine 4 controls switching means (excitation solenoid, not shown) provided in the opening / closing machine 4 in accordance with the opening / closing control. Based on a command from the unit 6, the brake is released when the opening / closing operation is performed, and the brake is braked when stopped.
Furthermore, the opening / closing machine 4 is provided with a brake lever 9 protruding downward to mechanically switch the brake device from the braking state to the release state (braking release state). Under the opening / closing machine 4, the brake lever 9 is provided with an abnormal-time closing device 10 of the present invention. As will be described later, the posture of the brake lever 9 is controlled in the event of an abnormality such as a fire. Thus, the shutter curtain 2 is set so that its own weight is lowered (closed weight). Here, the brake lever 9 is held in a braking posture in which the brake device is in a brake braking state and restricts the weight drop of the shutter curtain 2. Then, the brake lever 9 is forcibly pushed to the left from the braking state against the ammunition to a release posture so that the brake device is released from the braking state and the shutter curtain 2 is lowered in its own weight. Is set.

  On the other hand, 11 is a disaster prevention panel provided to centrally manage a plurality of switchgears. The disaster prevention panel 11 is connected to various switchgears including the shutter device and senses an abnormality such as a fire. In this case, an abnormality detection signal is set to be output to each device. Here, the disaster prevention panel 11 used in the present embodiment continuously outputs an abnormality detection signal to supply a continuous current, or outputs a current for a short period of time that is output once and set in advance. Any configuration may be used, and the disaster prevention panel 11 that supplies (outputs) a single current (abnormality detection signal) is employed here. The disaster prevention panel 11 is directly connected to the abnormal closure device 10, and an abnormality detection signal due to a fire or the like is set to be output to the abnormal closure device 10.

The abnormality closing device 10 will be described, but for convenience of description, description will be made with reference to the state shown in FIG. The substrate 12 constituting the abnormal closing device 10 includes a bottom piece 12a and a pair of upper and lower side pieces 12b protruding forward from both upper and lower edges of the bottom piece 12a, and the substrate bottom piece 12a. Is attached to the switch 4 by fixing it to the switch 4. A first transformation means 13 corresponding to the transformation means of the present invention is provided on the left half of the substrate bottom piece 12a. The first deforming means 13 is a self-holding type, is fixed to the bottom piece 12a of the substrate, and has a coil box 13a in which a first solenoid ( not shown ) (corresponding to the solenoid I of the present invention) is installed, and the coil box A first plunger (corresponding to the plunger of the present invention) 13b that protrudes upward from 13a and is movable up and down with respect to the coil box 13a is provided. Further, a pin 13c is provided at the front end portion (upper end portion) of the first plunger 13b so as to penetrate in the front-rear direction, and is fitted around the first plunger 13b between the pin 13c and the coil box 13a. A coil bullet machine 13d is provided in the state. The first plunger 13b protrudes upward from the coil box 13a upon receiving the biasing force of the first coil machine 13d in a non-excited state of the first solenoid (a natural state in which no load is applied to the first plunger 13b). It is set to be in the non-acting position.
The first transformation means includes a DC solenoid that operates based on an input of an abnormality detection signal (direct current) from the disaster prevention panel 11, and a single abnormality detection signal is input to the first solenoid. In this case, the first solenoid is excited to displace the first plunger 13b positioned at the non-operating position to the operating position where the first plunger 13b is retracted downward against the first coil elastic machine 13d, and the operating position is maintained. Is set to

A second transformation means 14 is provided on the right side of the first transformation means 13. The second coil box 14a constituting the second deforming means 14 is fixed to the lower right portion of the substrate bottom piece 12a. A second solenoid (not shown) provided in the second coil box 14a is supplied with power from an AC power source (AC current, which is a so-called commercial power source) connected to the control unit 6 to drive the switch 4. ) receiving and is configured with AC solenoid you excited.
The second coil box 14a is provided with a second plunger 14b protruding in an upwardly biased state so as to be able to advance and retreat in the vertical direction. A protruding tip (upper end) of the second plunger 14b is provided. The operating arm 14c is integrally connected.
On the other hand, the board bottom piece 12a is provided with a long hole 12c which is located in a portion facing the tip of the operating arm 14c and which is long in the vertical direction, and protrudes downward from the switch 4 through the long hole 12c. The brake lever 9 is set so as to protrude to the second deforming means 14 side.

  The distal end portion of the operating arm 14c is formed in an operating plate 14d that is wide in the left-right direction, and left and right step portions 14e are formed between the base end side portions. The operation plate 14d is formed with a long hole 14f that is long in the vertical direction, and an engagement recess 14g is formed on the left end surface of the operation plate 14d, that is, the end surface on the first deforming means 13 side. Further, the upper end surface of the operation plate 14d is set so as to face the brake lever 9 protruding from the long hole 12c formed in the substrate bottom piece 12a from below.

  On the other hand, reference numeral 15 denotes a guide body fixed to the substrate bottom piece 12a so as to face the rear surface of the operating arm 14c, and forwardly on the lower end edge of the guide body 15 facing the base end portion of the operating arm 14c. An extending proximal end guide piece 15a is formed, and the operating arm 14c is set so as to move freely through a through-hole 15b formed in the proximal end guide piece 15a. Further, a pin receiving piece 15c adjacent to the operating plate 14d is formed at the upper end portion of the guide body 15 facing the operating plate 14d at the tip of the operating arm 14c. The pin receiving piece 15c is provided on the operating plate 14d. A pin 15d that is fitted into the elongated hole 14f so as to be prevented from coming off and relatively movable is fixed. Thus, when the operating arm 14c moves back and forth in the vertical direction, the guide arm 15c receives the guide by the through hole 15b and the pin receiving piece 15c of the proximal end side guide piece 15a, and the pin 15d fitted into the long hole 14f The forward / backward movement stroke of the operating arm 14c with respect to the guide body 15 (second coil box 14a) is set to be within the stroke range of the long hole 14f.

And the operating arm 14c is in a state where it is not subject to interference by the connecting member 16 to be described later, by a coil bullet 14h that is externally fitted between the step portion 14e and the guide body proximal end guide piece 15a, In a natural state in which the second solenoid is not energized and no load is applied to the second plunger 14b, the lower end of the long hole 14f is biased in a direction protruding from the second coil box 14a. It is set so that the pin 15d is in the non-operating position where the pin 15d is engaged, and in the state of being in the non- operating position, the upper end surface of the operating arm 14c abuts on the brake lever 9 positioned in the braking posture, It is set so that the brake lever 9 is pushed upward against the ammunition and the brake lever 9 is changed to the release posture to release the brake device.
On the other hand, when AC power is supplied to the second solenoid and excited, or as will be described later, it receives interference by the connecting member 16 linked to the operation of the first plunger 13b of the first deforming means 13, When a load acts on the side retracted to the second coil box 14a, the second plunger 14b (operating arm 14c) is set to be displaced downward to the operating position against the urging force of the second coil machine 14h. In this way, the operating arm 14c is displaced from the non-operating position to the operating position, so that the brake lever 9 is transformed into a braking posture by receiving the urging force of the ammunition so that the brake device is brought into a braking state. Is set. At this time, the pin 15d of the guide body 15 is set to be positioned on the upper end side of the long hole 14f of the operation plate 14d.

Reference numeral 16 denotes a connecting member that connects the first plunger 13b and the second plunger 14b. The connecting member 16 connects a pair of front and rear plates 16a and 16b and upper end edges of the front and rear plates 16a and 16b. And a plate 16c. The connecting member 16 is located on the right side of the front and rear plates 16a and 16b (on the second deforming means 14 side), and at the lower corner portion is a U-shaped fixing piece 16d fixed to the substrate bottom piece 12a. The connecting member 16 can be freely swung with the pivot pin 16e as a fulcrum by fixing both ends of the pivot pin 16e that are fitted and fixed to the fixed piece 16b and pass through the front and rear plates 16a and 16b. It is configured. In addition, L-shaped through holes 16f are formed on the left and lower corners of the front and rear plates 16a and 16b, respectively, so as to communicate with each other in the front-rear direction. The upper and lower ends of a pin 13c provided in a vertically penetrating manner are fitted into the tip of the first plunger 13b of the appearance means 13. Here, the vertical hole length of the through-hole 16f is set to be shorter than the advance / retreat stroke (vertical movement amount) of the first plunger 13b.
Further, the connecting member 16 is connected to the left corner and an upper corner portion of one end of a coil-shaped pulling ammunition 16g, and the other end of the pulling ammunition 16g is connected to a piece on the substrate. The connection member 16 is configured to be pulled upward from the left side by being positioned and fixed on the left side of 12b and above the tip end extension of the first plunger 13b.

  An engaging pin 16h is provided at the right end portion of the connecting member 16 so as to connect the front and rear plates 16a and 16b at the upper corner portion, and the engaging pin 16h will be described later. In addition, it is set so as to be detachably engaged with an engagement recess 14g formed in the operation plate 14d of the second plunger 14b.

As shown in FIG. 5, the connecting member 16 engages the engaging pin 16h with the engaging recess 14g of the operating plate 14d in a state where the first plunger 13b is in the non-operating position protruding from the first coil box 13a. As a result, the second plunger 14b is position-regulated (held at the operating position) in a state where the second plunger 14b is positioned at the operating position against the second coil machine 14h, and the second plunger 14b is displaced to the non- operating position. Is set to be prohibited (regulated). In the first posture of the connecting member 16, the connecting member 16 receives the urging force of the tension ammunition 16g, and the pin 13c of the first plunger 13b is located on the lower end side of the connecting member through hole 16f. For this reason, the connecting member 16 is urged so as to swing clockwise with the pivot pin 16e as a fulcrum, that is, in a direction in which the engagement pin 16h engages with the engagement recess 14g. It is in a state. As a result, even if the second solenoid is energized, the second plunger 14b is allowed to be slightly displaced downward, but is not displaced to the operating position, so that the brake lever 9 is braked. Is set to be maintained.

  From the above state, when the first solenoid 13a is excited and displaced to the operating position, the connecting member 16 is in a state where the hole edge at the lower end of the through hole 16f is pulled by the pin 13c of the first plunger 13b. The left side portion is set so as to swing in the direction of arrow A (counterclockwise direction) shown in FIG. 5 with the pivot pin 16e as a fulcrum. In this state, as shown in FIG. 6A, the connecting member 16 is disengaged from the engaging pin 16h and the engaging recess 14g of the operating plate 14d, and the second plunger 14b is moved to the second coil machine. The brake lever 9 is set so as to be displaced from the braking position to the released position by receiving the urging force of 14h and being displaced to the non-operating position. In the second posture of the connecting member 16, the connecting member 16 swings counterclockwise about the pivot pin 16e as a fulcrum, and the connecting member 16 swings counterclockwise by the pin 13c. Therefore, the urging force in the direction in which the engagement pin 16h presses the operation plate 14d on the second plunger 16b side disappears, and interference of the engagement pin 16h with the second plunger 16b is avoided. Is set to At this time, the pin 13c of the first plunger 13b is elastically locked to the lower end of the L-shaped connecting member through-hole 16f, while the pivot pin 16e of the connecting member 16 is the left end edge of the operating plate 14d. It is in a state where it is close to the movement trajectory but does not interfere. As a result, in the second posture of the connecting member 16, the interlocking connection relationship between the first deforming means 13 and the second deforming means 14 is cut off, and as will be described later, an obstacle detection signal is input and the second changing means 14 When the deforming means 14 moves forward / backward, the first deforming means 13 is not restricted (interfered), and the second deforming means 14 is allowed to move forward / backward (see FIG. 6 (B)).

In the above state, when a reverse current is supplied to the first solenoid as will be described later, the first plunger 14b is in the process of being displaced toward the non-acting position side. In this case, FIG. As shown, the pin 13c of the first plunger 13b is displaced in the through hole 16f of the connecting member 16 so that the pin 13c contacts the upper end of the through hole 16f. At this time, the vertical hole length of the through hole 16f is shown. Is set to be smaller than the advance / retreat stroke of the first plunger 13b, so that the pin 13c is in a state of elastically contacting the upper end portion of the through hole 16f. As a result, the connecting member 16 is in a state in which an urging force that swings in the counter arrow A direction (clockwise direction) is acted on by the elastic pressure of the pin 13c of the first plunger 13b and the urging force of the tension ammunition 16g. ing. In the third posture of the connecting member 16, the engaging pin 16h is in contact with the left end edge of the operating plate 14d of the second plunger 14b so that the connecting member 16 is in contact with the second plunger 14b. When the displacement from the non-actuated position to the actuated position is made, the engaging pin 16h is in a state of changing to the first posture in which it engages with the engaging recess 14g (changeable state). As a result, in the third posture of the connecting member 16, the left end of the operating plate 14d is moved in response to the input of an obstacle detection signal and the operating arm 14c (second plunger 14b) being displaced from the non-operating position to the operating position. The engaging pin 16h that pushes the edge drops into the engaging recess 14g and engages, and the first plunger 13b is displaced to the non-operating position by receiving the urging force of the first coil machine 13d. The plunger 14b is set to return to the first posture of the connecting member 16 whose position is regulated at the operating position.

  Above the connecting member 16, first, second, and third switches 17, 18, and 19 that are separated from and in contact with the upper plate 16 c of the connecting member 16 are provided in a stacked manner in the front-rear direction. , 18 and 19 are set so as to be switched according to the change of the connecting member 16 to the first posture.

Next, the circuit configuration of the abnormal time closing device 10 will be described.
The first solenoid of the first transformation means 13 constitutes the first power supply circuit 20 between the disaster prevention panel 11. The second solenoid of the second transformation means 14 constitutes a second power supply circuit 21 between the second power supply circuit 21 and the AC power supply connected to the control unit 6 in order to drive the switch 4.
Further, a first relay circuit 21a in which the switch contact 8a of the obstacle detection switch 8 and the first relay R1 are connected is connected to the AC power source.
Further, a rectifier circuit C is provided between the AC power source and the first transformation means 13, and a reverse current supply circuit 22 for supplying the AC power source to the first solenoid as a reverse current is connected.
Furthermore, a second relay circuit 22a in which the switch contact LSD of the lower limit detection switch LSD and the second relay R2 are connected is connected to the AC power source.

  The first power supply circuit 20 is closed when the pair of relay contacts (a contact) R2 switched by the excitation of the second relay R2 of the reverse current supply circuit 22 and the connecting member 16 are in the first posture. The formed first switch 17 (a contact) is connected in series. Then, the first power supply circuit 20 has no input of the lower limit switch LSD, the abnormality detection signal (from the disaster prevention panel 11) in a state where the connecting member 16 is in the first posture and the first switch 17 is closed. When a current is supplied for a predetermined short period of time, the circuit is closed, and a DC power is supplied to the first solenoid to excite it, the first plunger 13b is displaced to the operating position, and the connecting member 16 is transformed to the second posture. Is set to When the change is made, the first switch 17 is opened and the first solenoid is not excited. However, the first switch 17 is configured as a self-holding type, and the first plunger 13b is in the operating position (the connection member 16 of the connecting member 16). The second position is set to be maintained.

  The second power supply circuit 21 is connected in series with a first relay contact R1 that is closed when the first relay circuit 21a is excited, and a third switch 19 (b contact). Then, the shutter curtain 2 comes into contact with the obstacle or the floor and the obstacle detection switch 8 is switched, the switch contact 8a is closed, the first relay circuit 21a is closed, and the first relay contact R1 is closed. And the second power supply circuit 21 becomes a closed circuit based on the fact that the connecting member 16 is in a posture other than the first posture (second and third postures) and the third switch 19 is closed. The two solenoids are set to be supplied with AC power. As a result, the energization of the second solenoid of the second deforming means 14 is performed only when the abnormality detection signal is output and the shutter curtain 2 is lowered by its own weight, and the shutter curtain 2 is released and stopped. When the seat plate 2a is pushed up by mischief under normal operating conditions or when an obstacle is detected during normal operation, the second solenoid of the abnormal closure device 10 is excited. Therefore, the second solenoid is excited while the displacement of the second plunger 14b (operating arm 14c) is regulated by the first deforming means 13 through the connecting member 16, and the second plunger 14b is loose. Such a situation is avoided, and consideration is given to enhancing the durability of the abnormal closure device 10.

  Then, the reverse current supply circuit 22 is closed to a position slightly before the shutter curtain 2 is fully closed (25 mm from the floor surface in this embodiment), and the switch contact LSD of the lower limit switch LSD is closed. Thus, the second relay contact R2 of the second relay R2 that is excited when the second relay circuit 22a becomes a closed circuit is connected. As a result, the shutter curtain 2 is brought into a state close to a fully closed posture, and the reverse power supply circuit 22 is switched to the closed circuit based on the switching of the pair of second relay contacts R2 due to the excitation of the second relay R2. Thus, a reverse current is supplied to the first solenoid, and the first plunger 13b is displaced toward the non-acting position side to change the connecting member 16 to the third posture.

The abnormal-time closing device 10 is provided with a manual closing lever 23 for manually operating the brake lever 9. The manual closing lever 23 is supported by the plunger box 13 a of the first deforming means 13. Is provided.
Here, the manual closing lever 23 will be described with reference to the drawing of FIG. 2 as described above. That is, the mounting piece 24a of the mounting bracket 24 is fixed to the front surface of the plunger box 13a, and the pair of upper and lower leg pieces 24b extending forward from the upper and lower ends of the mounting piece 24a have through holes 24c. It has been established. The manual operation lever 23 that is long in the vertical direction is provided so as to pass through the through holes 24c in a loosely fitting manner. The manual closing lever 23 is bent rearward at the upper end portion, and an operating piece 23a is formed on the upper plate 16c of the connecting member 16 in the vertical direction, and between the upper and lower mounting bracket leg pieces 24b. A restriction pin 23b that is located at the upper end portion of the facing portion and penetrates forward and backward is integrally provided. The manual closing lever 23 receives the urging force of the urging ammunition 23c externally fitted between the pair of mounting bracket leg pieces 24b, and the restriction pin 23b represses the upper leg piece 24b (subject to movement restriction). ) In the natural state, the operating piece 23a is provided so as to be separated from the connecting member left plate 16c. An operation wire 25 is connected to a lower end portion of the manual closing lever 23, and the operation wire 25 is connected to a manual operation tool 25a incorporated in an operation switch 7 provided in the opening. As the operating tool 25a is operated, the operating wire 25 is pulled against the biasing ammunition 23c, so that the manual closing lever 23 is displaced downward, and the operating piece 23a contacts the upper plate 16c of the connecting member 16 to be connected. The member 16 is configured to be displaced downward. When the manual closing lever 23 is operated in this way, the first plunger 13b is forcibly displaced to the operating position in conjunction with the forced change of the connecting member 16 from the first position to the second position. Thus, the operating arm 14c of the second deforming means 14 is set so that the brake lever 9 is changed to the released posture and the shutter curtain 2 is lowered by its own weight.
Here, since the first deforming means 13 is a self-holding type, the operating position is held even when it is forced to be displaced to the operating position. Thus, when the connecting member 16 is displaced to the second posture by the manual operation lever 23 with one operation of the manual operating tool 25a, the second posture of the connecting member 16 is set to be maintained, and the operation wire It is not necessary to continue pulling 25 (manual operation of the manual operation tool 25a), and the operability is good.

Then, in the process of lowering the dead weight based on the operation of the manual closing lever 23, the connecting member 16 is transformed into the second posture, and the second transformation means 14 is interfered with the first transformation means 13. Rather, in response to the input of the obstacle detection signal from the obstacle detection switch 8, the second solenoid is excited, so that the brake lever 9 is moved from the released position to the braking position, so-called obstacle detection is stopped. It is configured to be able to operate. Further, at this time, the first, second, and third switches 17, 18, and 19 are switched by changing the connecting member 16 to the second posture, so that the first solenoid is accompanied with the input of the lower limit detection signal LSD. Is supplied with a reverse current, the connecting member 16 is transformed into the third position, and as the shutter curtain 2 comes into contact with the floor surface, the second solenoid is excited to bring the second plunger 14b into the operating position. The connecting member 16 is set to return to the first posture after being displaced, and the control of the brake lever 9 based on the manual closing lever 23 and the control of the brake lever 9 based on the abnormality detection signal are the same control. It is comprised so that it may become a structure.

Next, the operation state of the abnormal-time closing device 10 and the opening / closing control state of the shutter curtain 2 will be described based on the flowchart of FIG.
During normal use where no abnormality has occurred, the shutter curtain 2 opens the opening, while the connecting member 16 of the abnormal-time closing device 10 is in the first posture, and the first plunger 13b is in the non-operating position. The second plunger 14b is not excited by the second solenoid, but is forced to be displaced to the operating position, and this state is established via the connecting member 16 by the first plunger 13b located at the non-operating position. Is retained.
In this state, when an abnormality detection signal is input from the disaster prevention panel 11, the first power supply circuit 20 is closed and the first solenoid is excited, whereby the first plunger 13b is displaced to the operating position and connected. The member 16 is transformed into the second posture, the connection state between the first plunger 13b and the second plunger 14b is canceled (the position restriction to the operating position of the second plunger 14b is released), and the second plunger 14b is In response to the urging force of the two-coil ammunition 14d, it is displaced to the non- operating position, and the brake lever 9 is set to the release posture to release the brake device.
If it will be in this state, the shutter curtain 2 will start the closing operation (self-weight fall, self-weight closure) with dead weight.

In the process of lowering the dead weight of the shutter curtain 2, when the seat plate 2 comes into contact with an obstacle before the switch contact LSD of the lower limit detection switch LSD is closed (no input of the lower limit detection signal), As the obstacle detection switch 8a is closed, the second power circuit 21 is closed to excite the second solenoid. At this time, the connecting member 16 is in the second posture and is connected to the first plunger 13b. Since the relationship is eliminated, the second plunger 14b is allowed to move to the operating position without interfering with the first plunger 13b, the brake lever 19 is changed to the braking posture, and the brake device is braked. As a state, the weight drop of the shutter curtain 2 is stopped. The second solenoid is supplied with power from the AC power source while the obstacle detection signal is input, that is, while the seat plate 2a is in contact with the obstacle, and the second plunger. 14b is positioned at the operating position, and the weight descent of the shutter curtain 2 is set to stop.
When the obstacle is removed and the switch contact 8a of the obstacle detection switch 8 is opened, the first relay contact R1 is opened, the second power circuit 21 is opened, and the power supply to the second solenoid is cut off. As a result, the second plunger 14b is displaced to the non- actuated position to change the brake lever 9 to the released posture. At this time, the first relay circuit 21a is provided with a delay control circuit (not shown). In this embodiment, the power supply to the second solenoid is cut off with a time difference of 10 seconds, the second plunger 14b is displaced to the non- actuated position, the brake lever 9 is changed to the released posture, and the shutter is again opened. The curtain 2 is set to start its own weight drop.

On the other hand, when the shutter curtain 2 is closed to the position before full closing and the switch contact LSD of the lower limit detection switch LSD is closed, the second relay switch contact R2 is closed and the reverse current power supply circuit 22 is closed. A reverse current from an AC power source is supplied to the first solenoid, and the connecting member 16 is transformed into the third posture. In this state, when the shutter curtain 2 comes into contact with the floor surface and the switch contact 8a of the obstacle detection switch 8 is closed, the first relay contact R1 is closed and the second power supply circuit 20 is closed as described above. Becomes a closed circuit, and AC power is supplied to the second solenoid. When the second solenoid is excited in this way, the second plunger 14b is displaced to the operating position, and the brake lever 9 is brought into the braking posture. The connecting member 16 that has been in the third posture is set so as to return to the first posture while changing its shape and stopping the weight drop of the shutter curtain 2.
Incidentally, when the shutter curtain 2 abuts against the floor surface to detect an obstacle and power is supplied to the second solenoid, in the present embodiment, the obstacle is detected and the second solenoid is immediately activated. Although it is configured to supply power, it may be configured to supply power by providing a preset time lag after detecting an obstacle. In such a case, an opening portion by the shutter curtain 2 is provided. The closure will be ensured.

In the present embodiment configured as described, when the abnormality detection signal from the disaster prevention panel 11 is input to the abnormal-time closure device 10 in the self-weight drop type shutter device 1, the first and second transformation means 13, 14 are provided. Is activated to change the brake lever 9 from the braking posture to the releasing posture, and the shutter curtain 2 can be lowered by releasing the weight of the shutter curtain 2 by releasing the brake device. In this case, the first changing means 13 for changing the posture of the brake lever 9 via the second changing means 14 and the connecting member 16 is excited by the first solenoid and the first plunger 13b is moved to the operating position. When displaced, it is a self-holding type in which the displaced state is maintained. For this reason, even if the abnormality detection signal from the disaster prevention panel 11 is not a continuous output, the operating position can be held, and a separate power source for holding the first transformation means 13 at the operating position can be eliminated. .
In addition, in this case, the first changing means 13 held in the operating position is changed to the non-operating position by supplying a reverse current to the first solenoid when the shutter curtain 2 is fully closed, so that the original state is obtained. Can return to. As a result, the signal output from the disaster prevention panel 10 to the shutter device 1 is only required when the weight drop starts, and the output of the abnormality detection signal output from the disaster prevention panel 11 is a continuous type, single-shot. It can be used for any type, etc., increasing versatility. In addition, since the shutter curtain 2 returns to its original state when the shutter curtain 2 is fully closed, no operation is required to return the abnormal-time closing device 10 to its original state when performing maintenance on the abnormal-time closing device 10. Therefore, maintenance can be performed with good workability.

Further, in this case, while the first deforming means 13 is held in the operating position, the connection with the second deforming means 14 is cut off, and the shutter curtain 2 as in the conventional one is disconnected. Before the fully closed state, the first changing means 13 located at the operating position interferes with the displacement of the second changing means 14 from the non-operating position to the operating position, and the second changing means 14. In addition, even if the obstacle is detected without returning to the non-acting position, after the obstacle is detected, the input of the obstacle detection signal disappears, and the weight drop of the shutter curtain 2 is reduced again. Can be started. As a result, as in the conventional case, after the obstacle detection, the abnormality detection is again performed from the disaster prevention panel 11 to the first transformation means 13 in order to release the brake device in order to resume the weight reduction of the shutter curtain. There is no need to output a signal.
In addition, when the shutter curtain 2 is fully closed due to its own weight drop, the connecting member 16 changes from the third posture to the first posture, and the abnormal-time closing device 10 can be returned to the original state. As a result, when performing maintenance of the self-weight descent device 10 and the like, even if an obstacle is detected in the process of the self-weight descent, the shutter curtain 2 does not stop in the halfway open state and is automatically In addition, when the shutter curtain 2 is fully closed, the abnormal-time closing device 10 can be closed, the connecting member 16 is in the first posture, the first transformation means 13 is in the non-operating position, and the second It is possible to return to the original state of the abnormal-time closure device 10 with the detection means 14 as the operating position, and maintenance can be performed with good workability.

  Further, in this device, the reverse current is supplied to the first solenoid when the shutter curtain 2 is substantially fully closed, and there is no possibility that an obstacle will be pinched when the shutter curtain 2 is closed thereafter. Since the connecting member 16 is in the third posture in the state, it is possible to reliably detect an obstacle in the process of lowering the weight of the shutter curtain 2, but when the shutter curtain 2 is fully closed, the abnormal closure device 10. Can be returned to the original state, and the abnormal-time closing device 10 having excellent functions and good operability can be obtained.

  Of course, the present invention is not limited to the above-described embodiment. In the above-described embodiment, a reverse current is supplied to the solenoid of the changing means when the shutter curtain reaches a preset position before full closing. Although it is configured to return to the non-operating position when an obstacle is detected, it is of course possible to supply a reverse current to the changing means at the timing when the shutter curtain is fully closed. It is.

It is a whole schematic diagram of a self-weight drop type shutter device. It is a bottom view of an abnormal time closure device. FIG. 3 is a left side view of FIG. 2. FIG. 3 is a right side view of FIG. 2. It is a principal part enlarged bottom view explaining the 1st attitude | position of a connection member. FIGS. 6A and 6B are enlarged bottom views of main parts for explaining the second posture of the connecting member. It is a principal part enlarged bottom view explaining the 3rd attitude | position of a connection member. It is a control circuit diagram of an abnormal time closing device. It is a flowchart figure explaining the control state by the closure device at the time of abnormality.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Shutter device 2 Shutter curtain 6 Control part 8 Obstacle detection switch 9 Brake lever 10 Abnormal closure device 11 Disaster prevention panel 13 First transformation means 13b First plunger 13c Pin 14 Second transformation means 14b Second plunger 14c Actuation plate 14g engaging recess 16 connecting member 16e pivot pin 16f through hole 16g pulling ammunition 16h engaging pin 20 first power circuit 21 second power circuit 22 reverse current supply circuit 22a second relay circuit 23 manual closing lever

Claims (4)

In the self-weight drop type shutter device that changes the brake lever linked to the switch from the braking posture to the release posture and lowers the shutter curtain by its own weight,
The emergency closing device that switches the brake lever to the release position when the abnormality detection signal is input from the disaster prevention panel is displaced from the non-operating position to the operating position by the solenoid that is excited by the input of the abnormality detection signal, and the brake lever is set to the release position. constituted by Hensugata means having a plunger switch, the modified appearance means, a self-holding type for holding a displacement to the working position of the plunger, by supplying a reverse current from the power source for driving the opener solenoid plunger connect the reverse current supply circuit to displace the non-acting position from the acting position, with the fully closed state of the shutter curtain is configured to return the brake lever in the braking position, said Hensugata means, second Hensugata means The brake lever is transformed into a braking posture and a releasing posture via the first, and the second transformation means is energized by detecting an obstacle in the shutter curtain. To a second solenoid, said second solenoid inoperative position displaced in the operating position from the arrangement by a second plunger which Hensugata to the braking position of the brake lever from the released position to its own weight drop shutter device by excitation of. In claim 1, the Hensugata means and second Hensugata means, shall interlocking via a connecting member, the connecting member, the plunger and the non-acting position, and the brake lever and the second plunger as the actuating position A first posture with a braking posture, a second posture with the plunger as the working position, and allowing the brake lever to change without interfering with the displacement of the second plunger, and the plunger from the working position to the non-working position side A self-weight drop shutter device configured to change to a third position that can be changed to a first position as the second plunger is displaced from the non-operating position to the operating position in the process of changing to 3. The self-weight drop type shutter device according to claim 1, wherein the plunger is configured such that a reverse current is supplied based on detection of a position before full closing when the shutter curtain reaches a position slightly before the fully closed state. . According to a third aspect of the present invention, in the process of lowering the dead weight of the shutter curtain, the plunger takes the connecting member in the third posture by detecting the position before full closing, and the first connecting member is moved to the operating position of the second plunger by detecting the obstacle. A self-weight descent shutter device configured to return to a posture and return a brake lever to a braking posture.

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