JP4896918B2 - Shutter device - Google Patents

Description

  The present invention relates to a shutter device in which opening and closing movement of a shutter curtain is performed by winding and unwinding by a winder, and in particular, a spring or the like that accumulates pressure when the shutter curtain is unwound by the winder is unfolded. The present invention relates to a shutter device to which a return elastic force of a return elastic member is applied.

In the shutter device in which the opening and closing movement of the shutter curtain in the vertical direction is performed by winding and unwinding by the winding body, a return spring is disposed on the winding body, and this return spring is arranged below the shutter curtain. A shutter device with a return spring that accumulates pressure when the winding body rotates for unwinding, and this accumulated return spring force is applied to the winding body when the shutter curtain is wound upward is provided. Yes (Patent Document 1 below).
JP-A-11-267935 (paragraph number 0034, FIG. 2)

  There are various uses of the shutter device, and one of the uses is a shutter device for disaster prevention for forming a disaster prevention zone by a fully closed shutter curtain. In this disaster prevention shutter device, even if the shutter curtain is fully closed due to the occurrence of a fire or the like, the evacuee can easily open and move the shutter curtain manually and pass through it, and after passing through the shutter curtain May be required to be in a fully closed state. In this case, it is required that the shutter curtain can be fully closed without using a special device or mechanism as much as possible.

  The object of the present invention is to release the shutter moving force that opens and moves the shutter curtain and the stopping force that stops the shutter curtain at a position other than the fully closed position. The present invention is to provide a shutter device that can be realized without using the device and mechanism as much as possible.

  The shutter device according to the present invention includes a shutter curtain that can be opened and closed in the vertical direction, a winding body that winds and rotates the shutter curtain for opening and closing the shutter curtain, and a lower part of the shutter curtain. A return elastic member that accumulates a return elastic force by the rotation of the winding body during unwinding, and applies the accumulated return elastic force to the winding body during the winding of the shutter curtain. In the shutter device, the torque around the winding body due to the return elastic force of the return elastic member is smaller than the torque around the winding body due to the downward closing movement force based on the weight of the shutter curtain. It is characterized by.

  In this shutter device, the return elastic member is accumulated when the shutter curtain is drawn out from the winder toward the fully closed position, and the return elastic is moved when the shutter curtain moves to the open side by being wound by the winder. The accumulated return elastic force of the member is used, and the torque around the winding body due to the return elastic force of the return elastic member accumulated when the shutter curtain is extended is the downward closing movement force based on the weight of the shutter curtain. Because it is smaller than the torque around the winding body due to, manual operation or automatic release of the shutter curtain opening movement force by automatic operation or automatic device or stopping the shutter curtain at a position other than the fully closed position When the stopping force by the device is released, the shutter curtain is lowered by its own weight to the fully closed position, and is fully closed. To become.

  As described above, in the present invention, when the shutter curtain opening movement force or stopping force is released, the shutter curtain is automatically fully closed by its own weight, so when the shutter curtain needs to be fully closed. The shutter curtain can be fully closed by simply releasing the opening and stopping force of the shutter curtain, and this fully closed state can be realized without using a special device or mechanism as much as possible.

  In addition, when the shutter curtain closes and moves downward due to its own weight by releasing the opening movement force or stopping force, the return elastic member closes and moves the shutter curtain while accumulating the return elastic force. The closing movement speed of can be reduced.

  When the shutter curtain is opened and closed, for example, a resistance force such as a friction force generated between the shutter curtain and a stationary member such as a guide member for guiding the opening and closing movement of the shutter curtain is generated. In such a case, such a resistance force may be included in the return elastic force of the return elastic member so that the shutter curtain is automatically fully closed by releasing the opening movement force or the stop force of the shutter curtain. The torque around the winding body due to the return elastic force is made smaller than the torque around the winding body due to the downward closing movement force based on the weight of the shutter curtain.

  Further, when the shutter device is provided with a biasing means for biasing the shutter curtain in the downward closing movement direction, the downward closing movement force based on the weight of the shutter curtain described above is It is assumed that the urging force by the urging means is included.

  In the present invention, the torque around the winding body due to the return elastic force of the return elastic member accumulated when the shutter curtain is extended is reduced downward based on the weight of the shutter curtain for the entire opening / closing movement range of the shutter curtain. It may be smaller than the torque around the winding body due to the closing movement force, or for a predetermined range on the closing side of the shutter curtain, for example, a range in which a normal tall person can stand and pass under the shutter curtain However, it may be smaller than the torque around the winding body due to the downward closing movement force based on the dead weight of the shutter curtain.

  For all or almost all of the opening / closing movement range of the shutter curtain, the torque around the winding body due to the return elastic force of the return elastic member is greater than the torque around the winding body due to the downward closing movement force based on the weight of the shutter curtain. If it is smaller, the shutter curtain can be closed and moved to its fully closed position by its own weight even if the shutter curtain is opened or moved to an arbitrary height position in the entire open / close movement range by manual operation or an automatic device. become able to.

  Here, “substantially all of the opening / closing movement range of the shutter curtain” means that there is an error with respect to the exact fully opened position, and that the position may be slightly lower than the fully opened position.

  Further, in the present invention, the end member obtained by subtracting at least a part of the weight of the end member from the dead weight of the shutter curtain is the torque around the winding body due to the return elastic force of the return elastic member accumulated when the shutter curtain is extended. It is preferable to make it larger than the torque around the winding body due to the downward closing movement force based on the weight of the partially excluded shutter curtain.

  According to this, when a lifting force corresponding to at least a part of the weight of the end member is applied to the shutter curtain, the winding of the shutter curtain by the winding body is started, and therefore the shutter curtain is opened. The movement can be performed lightly with a small force.

  In addition, the present invention can be applied to a shutter device in which the shutter curtain is configured by an arbitrary member. The shutter curtain may include a screen, and a plurality of continuous slats or a plurality of continuous shutters may be provided. These panels may be included, and further, a plurality of pipes and nets connected by links may be included.

  As described above, the torque around the winding body due to the return elastic force of the return elastic member accumulated when the shutter curtain is extended is obtained by subtracting at least a part of the weight of the end member from the weight of the shutter curtain. The shutter curtain is provided at the curtain body and at the front end of the curtain body on the closing side when the torque is greater than the torque around the winding body due to the downward closing movement force based on the weight of the shutter curtain. In this case, it is preferable that all or the main part of the curtain body is formed of a screen.

  According to this, when a lifting force corresponding to at least a part of the weight of the end member is applied to the shutter curtain so as to open and move the shutter curtain, the winding of the shutter curtain starts by the winding body. Alternatively, even if the main part is formed of a flexible screen, the winding can be performed without generating wrinkles as much as possible on the screen.

  In addition, all or the main part of the curtain body is formed of a screen made of a light material such as cloth, and the torque around the winding body due to the return elastic force of the return elastic member accumulated when the shutter curtain is extended is When the torque is greater than the torque around the winding body due to the closing movement force based on the weight of the end member excluded shutter curtain, which is obtained by subtracting the weight of the end member from the weight of the curtain, the lifting force corresponding to the weight of the end member The elastic force of the return elastic member may be set so that when the entire end member is lifted, the winding of the curtain body by the winding body starts. In this case, the weight of the curtain body is light and the end member Since the weight accounts for a large percentage of the shutter curtain's own weight, the setting of the elastic force of this return elastic member Without accuracy is required, easily.

  The main part of the curtain body described above occupies a large area of the curtain body and has a blocking function expected for the shutter curtain when the shutter curtain is fully closed. For example, the shutter curtain from the guide member provided at the connecting end portion on the open side of the curtain body connected to the winding body or the width direction end portion of the shutter curtain guided by the guide member It does not include a retaining portion for preventing the slipping out. Further, when a hard bar or the like made of metal is provided on the curtain body for reinforcement of the curtain body or operation of the curtain body, the hard bar or the like is not included. In other words, such a hard bar or the like may be provided on the curtain body made of screen.

  In the above, the return elastic member may be a return spring, may be a return rubber, or may be a liquid substance or a gel-like substance having elastic viscosity.

  When the return elastic member is a return spring, this return spring may be a return coil spring or a return spring spring.

  In the present invention, the number of return elastic members is arbitrary, and may be one or plural.

  When the return elastic member is a return spring, one end of the return spring is coupled to a rotating member that is a constituent member of the winding body, and the other end is coupled to a non-rotating immovable member. In this way, one end of the return spring is coupled to a rotating member of the winding body, and the other end is coupled to a non-rotating stationary member so that the return spring is returned to the return spring by rotation of the winding body when the shutter curtain is extended. The pressure can be accumulated, and the accumulated return spring force can be applied to the winding body when the shutter curtain is wound. Here, the immovable member may be an arbitrary member such as a bracket, a bearing member, or a cover that covers the winding body, which rotatably supports the winding body.

  Moreover, the position which arrange | positions a return spring with respect to a winding body is arbitrary.

  In the first example, when a component member of the winding body has a hollow member, a return spring is accommodated in the hollow member. According to this, the return spring can be arranged by utilizing the internal space of the hollow member as the return spring arrangement space. When the return spring is housed and disposed inside the hollow member as described above, the return spring is preferably a return coil spring having an axial length. According to this, even if the inside of the hollow member is a space having a small size in the radial direction, the return coil spring can be effectively stored in the internal space.

  The second example is to arrange the return spring around the winding body in a wound state. In this case, if the return spring is a return coil spring having an axial length, an increase in the radial dimension of the entire winding body including the return coil spring can be suppressed.

  In a third example, the return spring is disposed between a plurality of members that are spaced apart from each other in the radial direction in order to form the winding body. According to this, even if the return spring is provided on the winding body, the overall size of the winding body including the return spring can be made the same as that of the winding body without the return spring.

  In the fourth example, unlike the previous examples, the return spring is arranged at a position different from the arrangement position of the winding body, and the return spring and the winding body are connected via an intermediate member such as a gear. It is to be. This also allows the return spring force to be accumulated in the return spring by transmitting the rotation of the winding body when the shutter curtain is extended to the return spring via the intermediate member, and the return spring force is moved to open the shutter curtain. It can be given to the rotation of the winding body at the time.

  Moreover, a winding body can also be made into arbitrary structures.

  An example of the first winding body is that the winding body is a single rotatable shaft. In this case, one axis is formed by a plurality of axes, but these axes may be connected in series in the axial direction to form one axis. The single shaft may be a hollow shaft or a solid shaft.

  An example of the second winding body is provided with a stationary central shaft that does not rotate at the center, and a plurality of wheel members that are rotatable around the stationary central axis are arranged apart in the axial direction of the stationary central shaft, It is connecting these wheel members with a connection member.

  An example of the third winding body is provided with a rotation center shaft that rotates at the center, and a plurality of wheel members fixed to the rotation center shaft are provided apart from each other in the axial direction of the rotation center shaft. It is connecting the members with a connecting member.

Further, the present invention can be applied to a shutter device for an arbitrary use, and an example thereof is a disaster prevention shutter device for forming a disaster prevention section by a shutter curtain that is fully closed when a fire or the like occurs. Thus, when the present invention is applied to a shutter device for disaster prevention, even if the shutter curtain is fully closed due to the occurrence of a fire or the like, the evacuee manually operates the shutter while being assisted by the return elastic force of the return elastic member. The curtain can be opened and moved, and after the evacuees have passed under it, the shutter curtain is naturally fully closed by its own weight, so that it is possible to ensure smoke shielding and / or fire resistance by the shutter curtain. The disaster prevention shutter device includes an elevator disaster prevention shutter device in which the shutter curtain is fully closed between the elevator and the elevator hall. Moreover, the place where the disaster prevention shutter device including such an elevator disaster prevention shutter device is installed may be a building such as a building or an underground shopping center, or may be a transportation means such as a ship.

  Another application shutter device to which the present invention can be applied is a garage shutter device. Thus, when the present invention is applied to the garage shutter device, the shutter device is provided when the shutter curtain, which has been fully closed to take the car out of the garage, is moved to the fully open state or the half open state. As mentioned above, the shutter device is stopped at that position by the brake device and the locking device, and the brake device and the locking device are released by the manual device and the automatic device after taking out the car from the garage. Since the torque around the winding body due to the return elastic force of the member is smaller than the torque around the winding body due to the downward closing movement force based on the weight of the shutter curtain, the shutter curtain is naturally lowered to the fully closed position.

  As described above, the present invention can be applied to a shutter device for any application including a shutter device for disaster prevention and a shutter device for a garage, and the opening / closing direction of the shutter curtain in the vertical direction may be a vertical direction. The tilt direction may have a tilt angle with respect to.

  According to the present invention, when the opening moving force for opening and moving the shutter curtain and the stopping force for stopping the shutter curtain at a position other than the fully closed position are released, the shutter curtain can be fully closed by itself. It is possible to achieve an effect that can be realized without using an apparatus or a mechanism as much as possible.

  EMBODIMENT OF THE INVENTION Below, the form for implementing this invention is demonstrated based on drawing. The shutter device according to the present embodiment is a shutter device for disaster prevention for forming a disaster prevention zone with the shutter curtain when fully closed, and when the fire occurs, the shutter curtain is between the elevator and the elevator hall. It is a disaster prevention shutter device for an elevator that is closed and moved. The elevator disaster prevention shutter device will be described below. FIG. 1 is a front view showing the whole elevator disaster shutter device, FIG. 2 is a sectional view taken along line S2-S2 of FIG. 1, and FIG. 3 is a longitudinal sectional view of the elevator disaster shutter device of FIG.

  First, the overall structure of the elevator will be described. As shown in FIGS. 2 and 3, the concrete wall 4, which is a building frame that divides the vertical hole 2 and the elevator hall 3 in the building in which the elevator lifting and lowering box 1 moves up and down, has a lower surface on the elevator hall. An opening 6 that is a floor 5 continuing from 3 is formed, and an elevator door 7 is disposed at the back of the vertical hole 2 in the opening 6 that is an elevator entrance. In order to open and close the elevator door 7 disposed at a position deviated from the thickness of the wall 4 to the vertical hole 2 side, as shown in FIG. It is provided above and below the door 7.

  Upper and lower rollers 10 and 11 attached to the upper bracket 7A of the elevator door 7 are movably engaged with the upper rail 8, and the lower rail 9 provided on the floor 5 is connected to the lower surface of the elevator door 7. The elevator door 7 is a suspension type that is slidably engaged with the engaging member 12 attached to the upper roller 10 and is suspended by the upper roller 10. Due to the guiding action, it is opened and closed by a driving force of a driving means (not shown).

  As shown in FIG. 1, the upper frame member 13 and the side frame member 14 are disposed on the upper inner surface of the opening 6 and the left and right side inner surfaces, thereby forming an upper inner member that forms the upper inner surface of the opening 6. The upper frame member 13 and the side frame member 14 which is the side inner surface member forming the side inner surface are provided with an outer frame 15 for the opening which is a three-sided frame on the inner surface of the opening 6. . The upper frame member 13 and the side frame member 14 are made of a metal plate such as stainless steel and serve as a decorative material for the opening 6.

  As shown in FIG. 3, the upper frame member 13 includes a rising portion 13A on the elevator hall 3 side and an extending portion 13B extending horizontally from the lower end of the rising portion 13A to the elevator door 7 side. The rising portion 13A is attached to a mounting member 18 provided on the surface of the falling wall 4A above the opening 6 in the wall 4 on the elevator hole 3 side, and the extending portion 13B is the surface of the falling wall 4A on the vertical hole 2 side. Are coupled to a holding member 21 coupled via a coupling tool 19 and a bracket 20. The upper rail 8 is attached to the holding member 21.

  Further, the attachment member 18 above the rising portion 13A of the upper frame member 13 is disposed in a ceiling back space 17 that is partitioned from the elevator hall 3 by the ceiling member 16 in the vertical direction. As shown in FIG. 1, an elevator indicator 19 is disposed at the rising portion 13A.

  As shown in FIG. 1, the elevator disaster prevention shutter device according to the present embodiment includes a shutter curtain 30 that opens and closes the opening 6 by opening and closing, in other words, by moving up and down. As shown in FIG. 2, both left and right end portions of the shutter curtain 30, in other words, both end portions in the curtain width direction orthogonal to the opening / closing movement direction of the shutter curtain 30 are guide members while being prevented by the retaining members 30A. The guide rail 31 is slidably inserted. The pair of left and right guide rails 31 serving as guide members for guiding the opening and closing movement of the shutter curtain 30 is the surface of the side wall 4B provided on the left and right sides of the opening 6 in the wall 4 on the elevator hall 3 side. The decorative material 32 is arranged. These guide rails 31 are arranged on the side of the elevator hall 3 with respect to the outer frame 15 of the three-side frame that is the decorative material of the opening 6 and includes the upper frame member 13 and the side frame member 14. .

  As shown in FIG. 3, the opening / closing moving means 33 for opening and closing the shutter curtain 30 is arranged in a space above the ceiling member 16, that is, in the ceiling back space 17. The opening / closing moving means 33 includes a horizontal winding shaft 34 in which the upper end portion of the shutter curtain 30 is connected as will be described later, and a connecting means such as a chain on the winding shaft 34 which is the winding body of the present embodiment. And an opening / closing machine 36 connected via a brake 35, and a brake driving device 37 for starting and releasing a brake provided on a rotating shaft 36A of the opening / closing machine 36. The brake drive device 37 is provided with a manual operation unit, and the brake is activated and released by manually operating the manual operation unit. In addition, the brake drive device 37 is connected to a fire sensor installed at an appropriate place of a building such as a building where an elevator is installed or an underground shopping mall, and this fire sensor detects smoke, flame or heat and detects that. When a signal is input to the brake drive device 37, the brake is released.

  The brake drive device 37 described above is attached to the opening / closing machine 36, and the winding shaft 34 and the opening / closing machine 36 are attached to a bracket 38 coupled to the attachment member 18. Further, as shown in FIG. 3, the shutter curtain 30 is a lintel not shown in FIGS. 1 to 3, which is disposed on the ceiling member 16 from the winding shaft 34 of the opening / closing moving means 33 configured as described above. It hangs down through the slit.

  The shutter curtain 30 has a curtain main body 50 that is entirely or principally composed of a screen, and a seat plate 51 that is an end member provided at a lower end that is a front end of the curtain main body 50 on the closed side. The shutter curtain 30 that opens and closes as guided by the rail 31 is lowered, and since the brake is released, the rotating shaft 36A and the winding shaft 34 of the opening / closing machine 36 can be rotated. Sometimes, the rotating shaft 36A of the opening / closing machine 36 is rotated forward by a manual tool such as a handle or an electric tool such as a motor, and this forward rotation is transmitted to the take-up shaft 34 via the connecting means 35. The curtain 30 can be wound around the take-up shaft 34 and moved open, so that the shutter curtain 30 is stored in the take-up shaft 34 and opened. 6 can be opened. Thus, when the shutter curtain 30 opens and moves and the opening 6 is fully opened, the brake driving device 37 is activated by a manual operation or an automatic device, and the brake makes the rotation shaft 36A of the opening / closing device 36 unrotatable.

  Further, when the shutter curtain 30 is raised and the seat plate 51 reaches the lintel height position of the ceiling member 16 and the brake is activated, in other words, the shutter curtain 30 opens the opening 6. When a smoke, flame or heat detection signal from the fire sensor is input to the brake drive device 37 and the brake is released by this, the shutter curtain 30 includes the seat plate 51 by its own weight. 30 is lowered while the winding shaft 34 is rotated in the reverse direction, and when the seat plate 51 comes into contact with the floor 5, the opening 6 is closed by the shutter curtain 30 which is drawn out from the winding shaft 34 and moved closed. It has become.

  As a result, the opening 6 is closed by the shutter curtain 30 at a location between the elevator in the building and the elevator hall 3 when a fire occurs, and a disaster prevention zone is formed by the shutter curtain 30 being fully closed. . On the other hand, the work of opening and moving the shutter curtain 30 by rotating the rotary shaft 36A of the opening / closing device 36 forward with the above-described handle or the like is performed at the time of maintenance inspection of the elevator disaster shutter device.

  In the above, since the guide rail 31 for guiding the vertical movement of the shutter curtain 30 is arranged on the elevator hall 3 side with respect to the opening 6 which is an entrance to the elevator, the shutter curtain 30 is arranged from the opening 6. Is also opened and closed on the elevator hall 3 side. In addition, the opening / closing moving means 33 for opening and closing the shutter curtain 30 is disposed in the ceiling space 17 close to the falling wall 4 </ b> A of the wall 4.

  As shown in FIG. 2, a smoke blocking member 40 is housed and disposed inside the guide rail 31 into which both ends of the curtain width direction of the shutter curtain 30 are inserted. It is also housed in the slit of the lintel that passes up and down. As a result, when the shutter curtain 30 closes and moves to close the opening 6, smoke and flame reach the opposite side of the shutter curtain 30 through the inside of the guide rail 31 and the lintel slit. Is supposed to be prevented.

  In the above, the above-mentioned screen forming the curtain body 50 of the shutter curtain 30 is obtained by applying and / or impregnating a fireproof paint to a silica cloth or a glass cloth. Have sex.

  FIG. 4 is a front view of the entire winding shaft 34 in which the shutter curtain 30 is indicated by an imaginary line by a two-dot chain line. As shown in FIG. 4, the winding shaft 34 is rotatably supported by the left and right side plate portions 38A and 38B of the bracket 38 shown in FIG. A specific support structure for the winding shaft 34 is shown in FIG. 5 which is a cross-sectional view of the winding shaft 34. The winding shaft 34 is a hollow shaft, a first shaft-like body 60 is provided at one end thereof, a second shaft-like body 65 is provided at the other end, and the first shaft-like body 60 is provided. It is supported by one side plate portion 38A, and the second shaft-like body 65 is supported by the other side plate portion 38B.

  The first shaft-like body 60 includes cores 61 and 62 that are inserted and fixed inside the winding shaft 34 at intervals, and a central shaft that is fixed to the cores 61 and 62 and protrudes from the winding shaft 34. 63 and a flange member 64 attached to the protruding end of the central shaft 63, and the side plate portion 38A supports the central shaft 63 between the core 62 and the flange member 64 so as to be rotatable. The second shaft body 65 includes a ring member 66 inserted and fixed inside the take-up shaft 34, a center shaft 67 that is rotatably inserted into the ring member 66, and a center shaft that protrudes from the take-up shaft 34. The side plate portion 38B supports the central shaft 67 between the ring member 66 and the flange member 68 in a non-rotatable manner. For this reason, as described above, the rotation of the winding shaft 34 for opening and closing the shutter curtain 30 is the rotation between the center shaft 63 of the first shaft body 60 and the side plate portion 38A, and the second shaft shape. This is done by rotation between the ring member 66 of the body 65 and the central shaft 67.

  A sprocket 35A, which is a member constituting the connecting means 35 shown in FIG. 3, is attached to the end of the outer periphery of the winding shaft 34 on the side plate 38B side, and the connecting means 35 including the sprocket 35A causes the winding to be wound. The take-up shaft 34 is connected to a rotation shaft 36A of the opening / closing machine 36.

  A return coil spring 70 and a spring drive member 71 are housed in the take-up shaft 34, and the spring drive member 71 is coupled to the take-up shaft 34 by welding or a screw. Rotates together. One end of the return coil spring 70 is coupled to a projection 71 </ b> A formed on the spring drive member 71, and the other end is coupled to a projection 67 </ b> A formed on the central shaft 67 of the second shaft-like body 65. That is, one end of the return coil spring 70 is a member constituting the take-up shaft 34 and rotates integrally with the take-up shaft 34, and the other end does not rotate integrally with the take-up shaft 34. Are respectively coupled to the members.

  Further, as shown in FIG. 6, which is a cross-sectional view taken along line S <b> 6-S <b> 6 in FIG. 5, the hollow winding shaft 34 is provided with a split groove 34 </ b> A, and this split groove 34 </ b> A extends to both ends of the winding shaft 34. Has reached. Further, a split groove 34A is provided in the spring drive member 71 and the cores 61 and 62 of the first shaft-shaped body 60 that are disposed within the range in which the shutter curtain 30 is wound out of the entire length of the winding shaft 34. A recess 72 is formed at a position corresponding to. A bag portion 50A shown in FIG. 6 is formed on the upper end portion of the screen curtain body 50 of the shutter curtain 30. The bag portion 50A into which the locking member 73 such as a metal rod is inserted is divided into a groove 34A. Then, as described above, when the rotary shaft 36A of the opening / closing machine 36 is rotated by a manual tool such as a handle or an electric tool such as a motor, and the winding shaft 34 is rotated by this, the shutter curtain is 30 is wound around the winding shaft 34 while its upper end is connected to the winding shaft 34 by the locking action of the locking member 73 to the recess 72.

  When the shutter curtain 30 is unwound from the take-up shaft 34 and the seat plate 51 is landed on the floor 5 described above, the unwinding portion of the shutter curtain 30 is left on the take-up shaft 34. This prevents the upper end of the curtain body 50 from being detached from the winding shaft 34.

  Further, as shown in FIGS. 1 and 3, a gripping member 74 is attached to the side surface of the seat plate 51 on the elevator side, and as can be seen from FIG. Two are provided on the left and right at the same or substantially the same distance from the center in the width direction.

  In the above, as described above, the brake provided on the rotary shaft 36A of the opening / closing machine 36 is released by the brake driving device 37, and thus the shutter curtain 30 that is fully opened includes the weight of the seat plate 51. When the winding shaft 34 is closed and rotated by its own weight, the return spring force is accumulated in the return coil spring 70, and this accumulated return spring force is applied to the winding shaft 34 on the shutter curtain. It is applied as a torque in the rotational direction for winding 30.

  In this embodiment, the torque T1 around the take-up shaft 34 due to the return spring force of the return coil spring 70 accumulated when the shutter curtain 30 is extended from the take-up shaft 34 is based on the weight of the shutter curtain 30 in this embodiment. The torque T2 around the winding shaft 34 due to the downward closing movement force is smaller. In other words, the spring characteristics such as the number of turns and the diameter of the return coil spring 70 are set so as to obtain such a magnitude relationship between the torque T1 and the torque T2.

  FIG. 7 shows torque T1 and torque T2. The torque T2 is based on the distance L from the center of the winding shaft 34 to the outermost layer winding portion of the shutter curtain 30 and the own weight of the shutter curtain 30 fed out from the winding shaft 34 out of the total weight of the shutter curtain 30. This is a value obtained by multiplying the downward closing movement force W. The distance L and the closing movement force W are functions related to the amount of the shutter curtain 30 that is fed out from the winding shaft 34. Therefore, the torque T2 is the amount that the shutter curtain 30 is fed out from the winding shaft 34. The torque T1 also changes with the amount by which the shutter curtain 30 is fed from the take-up shaft 34. In the present embodiment, the torque T1 is applied to the entire opening / closing movement range of the shutter curtain 30. Is smaller than the torque T2.

  8 shows the fully open position of the shutter curtain 30 where the seat plate 51 is provided on the ceiling member 16 shown in FIG. 3 and reaches the position of the lintel 75. From this fully open position, In the entire position until the fully closed position of the shutter curtain 30 where the plate 51 has landed on the floor 5, the torque T1 is smaller than the torque T2.

  When the shutter curtain 30 is closed and moved by its own weight, the retaining member 30 </ b> A shown in FIG. 2 is in contact with the inner surface of the guide rail 31, or the shutter curtain 30 is moved while in contact with the smoke blocking member 40. Based on the above, a resistance force against the closing movement is generated, and this resistance force generates a torque on the opposite side of the torque T2 around the winding shaft 34 as in the torque T1, but the torque T1 Is a value obtained by adding such torque, the torque T1 is made smaller than the torque T2.

  Further, in this embodiment, when considering the weight of the shutter curtain 51 excluding the weight of the seat plate 51 from the weight W of the shutter curtain 30 fed from the winding shaft 34, the return spring force of the return coil spring 70 is considered. The torque T1 around the take-up shaft 34 is larger than the torque T3 around the take-up shaft 34 due to the downward closing movement force based on the weight of the shutter curtain excluding the seat curtain 51 for the entire opening / closing movement range of the shutter curtain 30. Thus, the spring characteristics of the return coil spring 70 are set. Therefore, if the weight of the seat plate 51 is prevented from acting on the curtain body 50 by lifting the seat plate 51 or the like when the shutter curtain 30 is in the fully closed state or the semi-closed state, the winding shaft 34 is The curtain body 50 is rotated in the direction to wind up by the return spring force of the return coil spring 70.

  Next, an operation of the elevator disaster prevention shutter device according to the present embodiment will be described.

  When a fire occurs in the building where the emergency shutter device for elevators is installed, and a signal from the fire sensor that detects the fire is input to the brake drive device 37 shown in FIG. Therefore, the winding shaft 4 connected to the rotating shaft 36A by the connecting means 35 starts to rotate due to the weight of the shutter curtain 30, and thereby the shutter curtain 30 is released. The seat plate 51 is placed on the floor 5 by performing a closing movement 30. As a result, a disaster prevention zone is formed by the shutter curtain 30 that is fully closed between the elevator and the elevator hall 3.

  Thus, during the rotation of the winding shaft 34 when the shutter curtain 30 is extended from the winding shaft 34, the return spring force is accumulated in the return coil spring 70 housed in the winding shaft 34. The

  After the shutter curtain 30 is fully closed, when a person who has evacuated using an elevator gets off at the floor where the shutter device equipped with the fully closed shutter curtain 30 is installed, The evacuees grip the gripping member 74 and lift the shutter curtain 30 to open and move the shutter curtain 30. Since this opening movement is assisted by the return spring force of the return coil spring 70 that has accumulated pressure, it can be lightly performed.

  After the shutter curtain 30 is opened and moved in this manner, the evacuees escape to the elevator hall 3 side by passing under the shutter curtain 30. When the escaped evacuee releases his / her hand from the gripping member 74, the torque T1 due to the return spring force of the return coil spring 70 is smaller than the torque T2 due to the dead weight of the shutter curtain 30 as described above. 30 automatically closes and returns to the fully closed state.

  As described above, according to this embodiment, when the evacuee escapes to the opposite side of the shutter curtain 30, the shutter curtain 30 that has reached the fully closed position is opened and moved. Since it is assisted by the return spring force of the return coil spring 70 that accumulates pressure when it is fed out from the shaft 34, the shutter curtain 30 can be opened and moved only by applying a small lifting force to the grip member 74. When the hand is released, that is, when the opening moving force for opening and moving the shutter curtain 30 is released from the shutter curtain 30, or when the stopping force that has stopped the shutter curtain 30 at the opening position is released, the torque T1 Is smaller than the torque T2, the shutter curtain 30 is It will return to the fully closed position by moving close and not. Thereby, the fire prevention division by the shutter curtain 30 provided with smoke shielding property and fire prevention property can be recovered.

  Further, according to the present embodiment, when the shutter curtain 30 is closed and moved by its own weight, the return coil spring 70 closes and moves the shutter curtain 30 while accumulating the return spring force. Can be reduced.

  Note that the force required to lift the shutter curtain 30 is preferably 50 N or less. That is, in the provisions related to disaster prevention equipment, the opening operation force for fire doors is set to 50 N or less so that persons with disabilities and the elderly can also open the door. Therefore, considering that the handicapped and elderly people may perform this lifting operation, lift the shutter curtain 30 with a lifting force of at most 50N, preferably less than 50N, for example, about 30N or 20N, and pass under it. It is preferable to be able to It is feasible to lift the shutter curtain 30 with such a small force because the width dimension of the shutter curtain 30 in the elevator disaster shutter device is not so large.

  Further, according to the present embodiment, the torque T1 is smaller than the torque T2 in the entire opening / closing movement range of the shutter curtain 30, so that the evacuee opens the shutter curtain 30 to a position sufficiently higher than his / her back. Even if it is moved, the shutter curtain 30 can be naturally closed and moved to the fully closed position, so that the evacuees can easily pass under the shutter curtain 30.

  Further, according to the present embodiment, the torque T1 is larger than the torque T3 around the take-up shaft 34 due to the downward closing movement force based on the weight of the shutter curtain excluding the seat plate 51, so the grip plate 74 lifts the seat plate 51. Accordingly, if the weight of the seat plate 51 is not applied to the curtain body 50, the winding shaft 34 is automatically rotated in the direction of winding up the curtain body 50 by the torque T1. For this reason, even if all or the main part of the curtain main body 30 is formed of a screen that is flexible and easily generates wrinkles, the curtain main body 50 can be formed while suppressing the generation of wrinkles as much as possible on the screen portion. The winding shaft 34 can be wound as predetermined.

  The same effect as this is that a lifting force is applied to the curtain body by providing the gripping member on the curtain body, and this lifting force causes the weight of the seat plate and the weight of the curtain body below the gripping member. This can also be achieved when lifting and lifting.

  Furthermore, according to this embodiment, since the return coil spring 70 is housed and disposed inside the hollow winding shaft 34, the return coil spring 70 can be protected from external force, and the return coil spring is wound around the outer periphery of the winding shaft 34. Unlike the case where the winding is arranged in a rotating manner, the diameter of the entire winding shaft 34 including the return coil spring 70 does not increase. For this reason, the winding shaft 34 can be effectively arranged in this arrangement space even in a disaster prevention shutter device for an elevator in which the arrangement space of the winding shaft 34 is limited.

  INDUSTRIAL APPLICABILITY The present invention can be used for closing and moving a shutter curtain by its own weight in a shutter device such as a disaster prevention shutter device provided with a return elastic member such as a return spring.

FIG. 1 is a front view showing an entire elevator disaster prevention shutter device that is a shutter device according to an embodiment of the present invention. 2 is a cross-sectional view taken along line S2-S2 of FIG. FIG. 3 is a longitudinal sectional view of the elevator disaster prevention shutter device of FIG. FIG. 4 is an overall front view of a winding shaft that is a winding body in which the shutter curtain is indicated by an imaginary line by a two-dot chain line. FIG. 5 is a cross-sectional view showing the internal structure of the winding shaft. 6 is a cross-sectional view taken along line S6-S6 of FIG. FIG. 7 is a conceptual diagram showing the relationship between the torque around the winding shaft due to the return spring force of the return coil spring and the torque around the winding shaft due to the downward closing movement force based on the weight of the shutter curtain. FIG. 8 is a conceptual diagram showing when the shutter curtain has reached the fully open position.

Explanation of symbols

30 Shutter curtain 34 Winding shaft as winding body 50 Curtain body 51 Seat plate as end member 70 Return coil spring as return elastic member T1 Torque around winding body due to return spring force of return coil spring T2 Shutter curtain Torque around the winding body due to the downward closing movement force based on its own weight

Claims (14)

A shutter curtain that can be opened and closed in the vertical direction, a winding body that winds and rotates the shutter curtain for opening and closing the shutter curtain, and the winding when the shutter curtain is extended downward. In the shutter device, the return elastic force is accumulated by the rotation of the body, and the accumulated elastic force is applied to the winding body when the shutter curtain is wound.
The opening and closing movement range of the shutter curtain from the fully closed position to the position where the torque around the winding body due to the return elastic force of the return elastic member is slightly lower than the fully open position or the fully open position. Is substantially smaller than the torque around the winding body due to the downward closing movement force based on the weight of the shutter curtain,
The shutter curtain includes a curtain body and an end member provided at the end of the curtain body on the closing side,
The torque around the winding body due to the return elastic force is the torque around the winding body due to the downward closing movement force based on the weight of the end member excluding the shutter curtain by subtracting the weight of the end member from the weight of the shutter curtain. Is bigger than
The weight of the end member occupies a large proportion of the weight of the shutter curtain,
The shutter curtain moves vertically between the elevator and the elevator hall, and is guided by a pair of left and right guide rails in which both left and right ends of the shutter curtain are slidably inserted. Open and close in the direction,
The pair of left and right guide rails are disposed closer to the elevator hall than the elevator doors,
The opening / closing movement of the shutter curtain is performed by an opening / closing moving means including the winding body, and the opening / closing moving means is arranged in a ceiling space that is vertically separated from the elevator hall by a ceiling member. Has been
A gripping member used for lifting the shutter curtain is provided on the surface of the shutter curtain on the elevator side ,
The pair of left and right guide rails are disposed on the surfaces on the elevator hall side of the side walls provided on the left and right sides of the opening serving as the elevator doorway, and the locations of these guide rails are as described above. A shutter device, characterized in that the shutter device is located on a left and right outside from an opening outer frame provided on an inner surface of the opening .   The shutter device according to claim 1, wherein the gripping member is attached to the end member.   The shutter device according to claim 1, wherein the gripping member is provided on the curtain body.   The shutter device according to any one of claims 1 to 3, wherein the opening / closing moving means is disposed closer to the elevator hall than the elevator door. 5. The shutter device according to claim 1 , wherein the outer frame for an opening has an upper frame member disposed on an upper inner surface of the opening , and the upper frame member is disposed on the elevator hall side. An elevator indicator is arranged at the rising portion provided, and the elevator indicator is hidden by the shutter curtain that is closed and moved downward as seen from the elevator hall. A shutter device characterized by being positioned. 6. The shutter device according to claim 1 , wherein the shutter curtain closed and moved from the winding body and the winding body are moved from the elevator door side to the elevator hall side. A shutter device comprising a curtain and the winding body arranged in this order. 7. The shutter device according to claim 1 , wherein all or a main part of the curtain body is formed of a flexible screen. The shutter device according to any one of claims 1 to 7 , wherein the torque around the winding body by the return elastic force is from the dead weight of the shutter curtain to the entire opening / closing movement range of the shutter curtain. The shutter device is characterized in that it is larger than the torque around the winding body due to the downward closing movement force based on the weight of the shutter curtain excluding the end member excluding the weight. 9. The shutter device according to claim 1 , wherein a force required to lift the shutter curtain is 50 N or less. 10. The shutter device according to claim 9 , wherein a force required to lift the shutter curtain is less than 50N. 11. The shutter device according to claim 10 , wherein a force required to lift the shutter curtain is about 30N. 11. The shutter device according to claim 10 , wherein a force required to lift the shutter curtain is about 20N. The shutter device according to any one of claims 1 to 12 , further comprising a locking device for stopping the shutter curtain that is in a fully open state or a half open state, and the shutter is released by releasing the locking device. A shutter device, wherein the curtain descends to a fully closed position. The shutter device according to any one of claims 1 to 13 , wherein when the end member is landed on a floor, an unwinding portion of the shutter curtain is left on the winding body. Shutter device.

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