JP5291487B2 - Shutter curtain rapid abnormal drop prevention device and method for shutter device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a device and a method, which can surely prevent a winding shaft from being freely rotated through the self-weight of a shutter curtain, when a function is disabled, for example, by the cutting of an endless traveling member. <P>SOLUTION: In this device, the winding shaft for winding/unwinding the shutter curtain making an opening/closing motion in a vertical direction is rotated by the traveling of the endless traveling member which is looped over a driven rotation member attached to the winding shaft, and a driving rotation member attached to a drive unit; and the rotation of the winding shaft is stopped by engaging a rotation stop member with the driven rotation member or an integrated rotation member integrated with the driven rotation member, when the function is disabled, for example, by the cutting of the endless traveling member. The rotation stop member is a first rotation stop member, and a pin-like member 90 is provided as a second rotation stop member separate from the first rotation stop member. When the first rotation stop member is engaged with a driven sprocket wheel 52 as the driven rotation member, the pin-like member 90 is engaged with the driven sprocket wheel 52. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention prevents the shutter curtain from suddenly falling down uncontrollably when the endless running member that rotates the winding shaft for opening and closing the shutter curtain of the shutter device becomes nonfunctional due to cutting or the like. For example, an opening shutter device for opening and closing an opening such as an entrance and a window with a shutter curtain, and a disaster prevention shutter device for forming a disaster prevention zone with the shutter curtain, etc. It can be used for a shutter device.

  An opening shutter device for opening and closing an opening such as an entrance / exit with a shutter curtain winds up a shutter curtain whose opening / closing movement direction is vertical, and rotates a winding shaft and a winding shaft. An opening / closing machine serving as a driving device for driving, a driven sprocket wheel attached to a winding shaft as a driven rotating member, a driving sprocket wheel attached to the opening / closing machine as a driving rotating member, and driven And a chain that is looped around the sprocket wheel and the drive sprocket wheel and serves as an endless traveling member. The drive force of the switch is transmitted to the take-up shaft through the drive sprocket wheel, chain, and driven sprocket wheel, so that the take-up shaft takes up and rotates the shutter curtain. Open and close in the vertical direction.

  In the shutter device having such a structure, it is normal that the presence of the chain prevents the winding shaft from freely rotating due to the weight of the shutter curtain. When it is cut due to deterioration, fatigue failure, etc., or when the chain is detached from the driving sprocket wheel or driven sprocket wheel, the winding shaft on which the shutter curtain's own weight acts freely rotates, In other words, if the chain becomes non-functional, the shutter curtain will fall rapidly and uncontrollably due to free rotation of the winding shaft, and means for avoiding this rapid drop is described in Patent Document 1 below. Is shown in

  In Patent Document 1, a ratchet gear that is an integral rotating member integrated with a winding shaft and a driven sprocket wheel is provided in a shutter device, and a stationary member of the shutter device is provided with a spring as a biasing means. A stopper having a rotary idler meshing with the chain and being in contact with the chain and an engaging portion capable of being engaged with the teeth of the ratchet gear is rotatably provided. The stopper, which serves as a rotation stop member for stopping the rotation of the take-up shaft when the chain idler is removed from the chain and the chain is cut off, moves the engagement portion to the side where the engagement portion engages with the ratchet gear. By rotating with the spring, the engaging portion of the stopper is engaged with the teeth of the ratchet gear. So as to prevent uncontrolled rapid abnormal drop in coater curtain.

Japanese Utility Model Publication No. 2-105494

  According to the above prior art, the shutter that is the rotation stop member is engaged with the teeth of the ratchet gear that is an integral rotation member that is integrated with the winding shaft and the first sprocket wheel. It is possible to prevent the take-up shaft from rotating freely due to its own weight and the shutter curtain from dropping rapidly and abnormally. However, it is possible to replace the chain that is an endless running member that has become non-functional due to cutting, the drive sprocket wheel and the driven sprocket In order to rework the chain detached from the wheel on the driving sprocket wheel or the driven sprocket wheel, it is required to more reliably prevent the winding shaft from freely rotating due to the weight of the shutter curtain.

  An object of the present invention is to provide a shutter curtain rapid abnormal drop prevention device and method for the shutter device that can more reliably prevent the winding shaft from freely rotating due to the weight of the shutter curtain when the endless running member becomes nonfunctional. It is in.

  A shutter curtain rapid abnormal drop prevention device for a shutter device according to the present invention includes a driven rotating member attached to a winding shaft for winding and unwinding a shutter curtain whose vertical direction is the opening / closing movement direction, and the winding A driving rotating member attached to a driving device for rotating the shaft, and the driven rotating member and the driving rotating member are wound around, and the rotational driving force of the driving device is transmitted from the driving rotating member to the driven rotating member. To stop rotation of the winding shaft by engaging the driven rotating member or the integrated rotating member integrated with the driven rotating member when the endless traveling member is rendered non-functional And a shutter curtain rapid abnormal drop prevention device for a shutter device, wherein the rotation stop member is a first rotation stop member. Thus, the second rotation stopping member is a member different from the first rotation stopping member, and the second rotation stopping member is configured such that the first rotation stopping member is the driven rotation member or the integrated rotation. When engaged with a member, it is engaged with the driven rotating member or the integrated rotating member.

  In this device, when the endless traveling member is cut off, the rotation stop for stopping the rotation of the take-up shaft by engaging the driven rotating member or the integrated rotating member integrated with the driven rotating member. The member is a first anti-rotation member, and a second anti-rotation member that is a member different from the first anti-rotation member is prepared, and the second anti-rotation member is a first rotation. When the stop member is engaged with the driven rotating member or the integrated rotating member, the winding shaft is engaged with the driven rotating member or the integrated rotating member, thereby rotating the winding shaft when the endless running member is disabled. Therefore, the first rotation stop member and the second rotation stop member can more reliably prevent the winding shaft from freely rotating due to the weight of the shutter curtain.

  The second rotation stop member is detachably engaged with the driven rotation member or the integrated rotation member, and the first rotation stop member and the second rotation stop member are connected with the driven rotation member or the integrated rotation member. By releasing the engagement with the member, the winding shaft can be rotated to wind up and unwind the shutter curtain.

  The structure and shape of the second rotation stopping member are arbitrary as long as the winding shaft can be stopped by engaging the driven rotation member or the integrated rotation member. For example, when the driven rotating member or the integrated rotating member has a plurality of teeth formed in the circumferential direction on the outer peripheral portion, the second rotation preventing member is connected to these teeth. It is made into the member which has a pin-shaped part inserted and engaged by the recessed part between. The number of pin-like portions of the second rotation stop member in this example may be one or plural.

  In addition, the second rotation stop member can be attached to or detached from a support member that supports the driven rotation member or the integrated rotation member by attaching or detaching the second rotation stop member, or the like. Alternatively, it can be engaged with and disengaged from the integral rotating member.

  Further, the member having the pin-shaped portion as the second rotation stopping member may be a pin-shaped member, and the pin-shaped member may be detachable from the support member that supports the driven rotation member or the integrated rotation member.

  When the member having the pin-shaped portion as the second rotation preventing member is a pin-shaped member, and the pin-shaped member is detachable from the support member that supports the driven rotating member or the integrated rotating member. The support member is provided with first and second placement portions on which the pin-like member is detachably disposed, and the interval between the first placement portion and the second placement portion is set to a driven rotation member or an integrated rotation member. It is good also as nxt + t / 2, when the space | interval (tooth pitch) of the teeth | gears formed in the circumferential direction by t is set to t and n is made into the integer containing zero.

  According to this, when the endless traveling member becomes nonfunctional, when the first rotation stop member is engaged with the driven rotation member or the integrated rotation member in order to stop the rotation of the winding shaft, Even if the rotation-stopping member is deformed or the like, and the rotation of the driven rotation member or the integrated rotation member is stopped at an angular position shifted by about half of the interval t between the teeth, the pin-shaped member is arranged in the first position. Since it can select and arrange | position to either a part and a 2nd arrangement | positioning part, a pin-shaped member can be engaged with a driven rotation member or the said integrated rotation member.

  The above-mentioned n × t + t / 2 may be a value that is exactly n × t + t / 2, or the first and second arrangement portions are formed with respect to an accurate value of n × t + t / 2. A value including an error based on work or the like may be used.

  Further, the number of the first placement portions and the second placement portions may be one or plural. That is, the number of pin-shaped members may be one or plural.

  Furthermore, the structure for detachably arranging the pin-shaped member with respect to the support member that supports the driven rotating member or the integrated rotating member is arbitrary, and one example is that the pin-shaped member is inserted into the supporting member. The pin-shaped member is detachably arranged on the support member by forming a hole to be inserted and inserting the pin-shaped member into the hole.

  In this case, the pin-shaped member may be simply inserted into the hole formed in the support member, or for the fixed state arrangement for arranging the pin-shaped member in the fixed state on the support member. By providing the member, the pin-like member placed in the support member by being inserted into the hole formed in the support member may be placed in a fixed state by the fixed state placement member and placed in the support member. Good.

  When the pin-shaped member is provided with a screw shaft portion, the fixed state arrangement member can be a nut member into which the screw shaft portion is screwed. The nut member may be coupled to the support member or may not be coupled.

  Further, the fixed state arrangement member may be a member in which a pin-shaped member is clamped by a chuck means or the like.

  The shutter curtain rapid abnormal drop prevention method of the shutter device according to the present invention includes a driven rotating member attached to a winding shaft for winding and unwinding the shutter curtain whose vertical direction is the opening / closing movement direction, and the winding An endless traveling member that is wound around a drive rotation member attached to a drive device for rotating the shaft and transmits the rotational drive force of the drive device from the drive rotation member to the driven rotation member becomes nonfunctional And a method for preventing a shutter curtain rapid abnormal drop of a shutter device that stops rotation of the take-up shaft by engaging a rotation stop member with the driven rotation member or an integrated rotation member integrated with the driven rotation member. The rotation stop member is a first rotation stop member, and a second rotation stop member which is a separate member from the first rotation stop member is provided. When the first rotation stop member is engaged with the driven rotating member or the integrated rotating member, the step of engaging with the driven rotating member or the integrated rotating member, and the functionless endless running And a step for functionalizing the member.

  In this method, when the first rotation stop member is engaged with the driven rotation member or the integrated rotation member due to the non-function of the endless traveling member, the first rotation stop member is a separate member. Since the operation for engaging the two rotation stopper member with the driven rotation member or the integral rotation member is performed, the winding shaft freely rotates by the weight of the shutter curtain by the first rotation stopper member and the second rotation stopper member. This can be prevented more reliably. And the operation | work for functionalizing the endless traveling member which became nonfunctional can be performed after this.

  In this method, the work for functionalizing the non-functional endless travel member is performed when both the first rotation stop member and the second rotation stop member are engaged with the driven rotation member or the integrated rotation member. Or when the first rotation stop member is released from the engagement with the driven rotation member or the integrated rotation member and only the second rotation stop member is engaged with the driven rotation member or the integration rotation member. You may go to

  According to the former, the work for functionalizing the non-functional endless traveling member is performed when both the first rotation stop member and the second rotation stop member are engaged with the driven rotation member or the integrated rotation member. Therefore, this operation can be performed when the rotation of the driven rotation member or the integrated rotation member is more reliably stopped by both the first rotation stop member and the second rotation stop member.

  In addition, the shutter curtain rapid abnormal drop prevention device of the shutter device according to the present invention is a driven rotating member attached to a winding shaft for winding and unwinding the shutter curtain whose vertical direction is the opening and closing movement direction, A drive rotary member attached to a brake-equipped drive device for rotating the winding shaft, and the driven rotary member and the drive rotary member are wound around, and the rotational driving force of the drive device is driven to rotate from the drive rotary member. An endless traveling member for transmitting to the member, and when the endless traveling member is rendered nonfunctional, the endless traveling member is engaged with the driven rotating member or an integrated rotating member integrated with the driven rotating member, thereby A rotation stopping member for stopping rotation, and a shutter curtain rapid abnormal drop prevention device of a shutter device comprising: the driven rotation member; It has a connecting device that can be attached to and detached from the driving rotating member and connects the driven rotating member and the driving rotating member. In this connecting device, the rotation stopping member is the driven rotating member or the integrated rotating member. When engaged with the rotating member, the braking force of the brake-equipped driving device can be transmitted to the driven rotating member via the driving rotating member.

  The shutter curtain rapid abnormal drop prevention device of this shutter device is detachably attached to the driven rotating member and the driving rotating member, and has a connecting device for connecting these driven rotating member and the driving rotating member. In addition, this coupling device can transmit the braking force of the driving device with a brake to the driven rotating member via the driving rotating member when the rotation preventing member is engaged with the driven rotating member or the integrated rotating member. Therefore, when the endless traveling member is rendered nonfunctional, the rotation stop member is engaged with the driven rotation member or the integrated rotation member, and the braking force of the drive device with the brake is connected to the drive rotation member. By being transmitted to the driven rotating member via the apparatus, it is possible to more reliably prevent the winding shaft from freely rotating by the weight of the shutter curtain.

  In this device, the coupling device may be configured such that the rotational driving force of the brake-equipped driving device can be transmitted to the driven rotating member via the driving rotating member.

  According to this, it is necessary to rotate the winding shaft in order to functionalize the endless traveling member that has become nonfunctional after releasing the anti-rotation member from engagement with the driven rotating member or the integrated rotating member. In this case, the take-up shaft can be rotated by transmitting the rotational driving force of the brake-equipped driving device to the driven rotating member via the driving rotating member and the coupling device.

  In addition, when the coupling device can transmit the rotational driving force of the driving device with a brake to the driven rotational member via the driving rotational member, the coupling device is composed of a plurality of rotational members. Are connected in series, and at least one of the rotating members is arranged on an arc centered on the center of the rotating member to which the one rotating member is connected. The one rotating member may be a rotating member connected to one of the driven rotating member and the driving rotating member.

  According to this, for various shutter devices in which the distance between the driven rotating member and the driving rotating member is different, the arrangement position of the one rotating member of the coupling device is the rotating member to which the one rotating member is connected. By changing the position to a position on the arc centered on the center of the one rotation member, the one rotation member is connected to the driven rotation member and the drive rotation member having different intervals while securing the connection between the rotation members. Among these, since this one rotating member can be connected to one to be connected, the coupling device has versatility with respect to various shutter devices in which the interval between the driven rotating member and the driving rotating member is different. It becomes like this.

  Further, the shutter curtain rapid abnormal drop prevention method of the shutter device according to the present invention includes a driven rotating member attached to a winding shaft for winding and unwinding the shutter curtain whose vertical direction is the opening / closing movement direction, An endless traveling member that is wound around a drive rotation member attached to a brake-equipped drive device for rotating the winding shaft and transmits the rotational drive force of the drive device from the drive rotation member to the driven rotation member When the rotation of the winding shaft is stopped, the rotation of the winding shaft is stopped by engaging the rotation stopping member with the driven rotation member or the integrated rotation member integrated with the driven rotation member. In the abnormal drop prevention method, when the rotation of the winding shaft is stopped by the rotation stop member, the driven rotation member and the A step of transmitting a braking force of the driving device with a brake to the driven rotating member via the driving rotating member and the connecting device, and a non-functionalized endless traveling member. And a step for functionalizing the device.

  In this method, when the rotation of the winding shaft is stopped by the rotation preventing member due to the non-functionality of the endless traveling member, the operation of connecting the driven rotating member and the driving rotating member by the connecting device is performed. Since the braking force of the drive device with brake is transmitted to the driven rotation member via the drive rotation member and the coupling device, the shutter curtain is wound by its own weight by both the rotation stop member and the brake force of the drive device with brake. It is possible to more reliably prevent the spindle from freely rotating. And the operation | work for functionalizing the endless traveling member which became nonfunctional can be performed after this.

  In this method, the work for functionalizing the endless traveling member that has become nonfunctional is to release the rotation stop member from being engaged with the driven rotation member or the integrated rotation member, and to drive the rotational driving force of the drive device with a brake. You may implement after the process of fully closing a shutter curtain by transmitting to a driven rotation member and a winding shaft via a rotation member and a connection device.

  According to this, the work for functionalizing the non-functional endless traveling member can be performed in a state in which the take-up shaft is less likely to rotate due to the weight of the shutter curtain, so that this work can be easily performed. become.

  In the above description, the functionless endless traveling member means that the winding shaft is in a state of free rotation due to the weight of the shutter curtain. One example of this defunctionalization is that the endless traveling member is cut, and another example is that the endless traveling member is disengaged from the drive rotating member and the driven rotating member described above, and another example is When the rotation of the driving rotating member is transmitted to the driven rotating member and the stop of the driving rotating member is transmitted to the driven rotating member due to the frictional force generated between the endless traveling member, the driving rotating member, and the driven rotating member. In other words, the magnitude of the frictional force becomes smaller than the original magnitude or disappears. And, functionalizing an endless traveling member that has become non-functional means that if the non-functionalization is cutting of the endless traveling member, it is to replace the cut endless traveling member with a new endless traveling member. However, when the endless traveling member is detached from the driving rotating member or the driven rotating member, the endless traveling member is re-applied to the driving rotating member or the driven rotating member, or the endless traveling member is used as a new endless traveling member. If the non-functionalization means that the frictional force is smaller than the original size or disappears, replace the endless traveling member with a new endless traveling member. is there.

  Further, when the first rotation stop member is engaged with the driven rotation member or the integrated rotation member described above, the second rotation stop member described above is engaged with the driven rotation member or the integrated rotation member. Instead, when the first rotation stop member is not engaged with the driven rotation member or the integrated rotation member, the second rotation stop member may be engaged with the driven rotation member or the integrated rotation member. After the second rotation stop member is engaged with the driven rotation member or the integrated rotation member, the first rotation stop member may or may not be engaged with the driven rotation member or the integrated rotation member. .

  Further, in the present invention described above, the types of the driven rotating member, the driving rotating member, and the endless traveling member are arbitrary, and examples thereof include the driven rotating member, the driving rotating member, and the endless traveling member as the driven sprocket wheel, the driving sprocket. Another example is to use a driven timing pulley, a driving timing pulley, and a timing belt as the driven rotating member, the driving rotating member, and the endless traveling member.

  In addition, the apparatus and method according to the present invention can be applied to a shutter apparatus in which the shutter curtain is composed of an arbitrary curtain constituent member. That is, in the present invention, the entire or main part of the shutter curtain may be formed of the same type of curtain constituent member, for example, a slat, or the entire or main part of the shutter curtain is a sheet, panel, net, link. It may be formed by a rod-like member such as a plurality of pipes that are connected together, or the whole or the main part of the shutter curtain is connected by these slats, sheets, panels, nets, and links. You may form with the combination of a some curtain structural member among rod-shaped members, such as a some pipe.

  Further, a return spring is arranged on the winding shaft so that the return spring force is accumulated by the downward movement of the shutter curtain, and the upward movement of the shutter curtain is caused by the return spring force accumulated in the return spring. It may be used as an auxiliary force.

  In addition, the apparatus and method according to the present invention can be applied to shutter devices for various uses, and these shutter devices include a shutter device for management for opening and closing an opening such as an entrance / exit with a shutter curtain. In addition, a shutter device for disaster prevention for forming a disaster prevention zone with a fully closed shutter curtain, and a combined shutter device for management and disaster prevention are included. Further, the shutter device for disaster prevention includes a shutter device for lifting means for forming a disaster prevention section in the vicinity of the lifting means such as an elevator or a staircase.

  According to the present invention, it is possible to more reliably prevent the winding shaft from freely rotating due to the weight of the shutter curtain when the endless running member is rendered nonfunctional.

FIG. 1 is a front view showing an entire shutter device according to an embodiment of the present invention. FIG. 2 is an enlarged view of a part of the two left and right brackets shown in FIG. 1 and is a partially cutaway view showing a winding shaft in section. FIG. 3 is a front view showing the periphery of the bearing member in the connecting shaft shown in FIG. 2 in section. 4 is a side view of the connecting shaft portion shown in FIGS. 2 and 3 as a cross section, and the right bracket shown in FIGS. 1 and 2 as seen from the winding shaft side. It is a figure which shows before the cutting | disconnection of the chain which is an endless traveling member. FIG. 5 is a side view of the right bracket shown in FIGS. 1 and 2 as viewed from the winding shaft side, and shows only the support plate and the column shown in FIGS. 2 and 3. FIG. FIG. 6 is a view similar to FIG. 4 showing the chain after being cut. FIG. 7 is a cross-sectional view showing the main part when the rotation of the driven sprocket wheel that is the driven rotating member is stopped by the pin-shaped member that is the first rotation stopping member. FIG. 8 is a view similar to FIG. 7 showing another embodiment of the pin-shaped member. FIG. 9 is a view similar to FIG. 7 showing still another embodiment of FIG. FIG. 10 shows an embodiment for transmitting the braking force of an opening / closing machine, which is a drive device with a brake, from a drive sprocket wheel, which is a drive rotation member, to a driven sprocket wheel, which is a driven rotation member, via a coupling device. FIG. 11 is a cross-sectional view taken along line S11-S11 in FIG. 12 is a cross-sectional view taken along line S12-S12 of FIG. FIG. 13 is a diagram showing an embodiment of a versatile coupling device that can be applied to various shutter devices in which the distance between a driving sprocket wheel that is a driving rotating member and a driven sprocket wheel that is a driven rotating member is different.

  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 management shutter device. That is, in the shutter device according to the present embodiment, the shutter curtain opens and closes an opening such as an entrance / exit when an operation device described later is operated. In the present invention, a sensor for detecting a person, a vehicle, or the like is used instead of the operation device, and the shutter curtain opens and closes an opening such as an entrance / exit based on a signal from the sensor. The present invention can also be applied to a shutter device.

  FIG. 1 is a front view of the entire management shutter device according to the present embodiment. In FIG. 1, the opening / closing movement direction is a vertical direction, and a shutter curtain 1 that moves downwardly closes and moves is shown. It shows a half-closed state that is closed to about half. The opening that is opened and closed by the shutter curtain 1 is an entrance / exit 2 formed in the building, and the entrance / exit 2 includes the left and right building frames 3 and 4 such as walls and the lower end of the shutter curtain 1 when fully closed. It is surrounded by a floor 5 and a ceiling member 6 which are mating members against which the part hits. The left and right building frames 3 and 4 are attached with two left and right guide rails 7 and 8 in which both end portions in the left and right direction of the shutter curtain 1, in other words, both end portions in the width direction of the shutter curtain 1 are slidably inserted. The shutter curtain 1 is opened and closed in the vertical direction by being guided by the guide rails 7 and 8 serving as guide members.

  The left and right brackets 10 and 11 are disposed in the ceiling back space 9 partitioned by the ceiling member 6 with respect to the entrance / exit 2, and these brackets 10 and 11 are lowered in the ceiling back space 9. Since both ends of the winding shaft 13 in the axial direction of the winding shaft 13 are rotatably supported by the brackets 10, 11 while being coupled to the building housing 12 such as a wall, the brackets 10, 11 are This is a support member that rotatably supports the winding shaft 13. The upper end of the shutter curtain 1 is fastened to the winding shaft 13 with a fastening tool such as a bolt, and the shutter curtain 1 passes through the slit 15 of the lintel 14 disposed on the ceiling member 6. The shutter curtain 1 is opened and closed in the vertical direction from the ceiling back space 9 side, and the shutter curtain 1 is moved up and down by the winding shaft 13 rotating forward and backward.

  In addition, by attaching a case member having a length in the left-right direction straddling the brackets 10, 11 to the brackets 10, 11, the case shaft and the brackets 10, 11 allow the winding shaft to be placed in the ceiling space 9. You may provide the shutter box in which 13 was accommodated. In the case where such a shutter box is provided, a work opening that is opened and closed by a lid or the like or is always open is formed in the shutter box in order to be able to perform work related to chain exchange described later. The position of the shutter box in which the work opening is provided may be an arbitrary position, but preferably, the work opening is formed at a location close to a later-described chain arrangement position in the shutter box. In such a work opening, the case member is not provided, and the shutter box is formed by the brackets 10 and 11, and the shutter box has the case member and the brackets 10 and 11 as described above. For example, it may be formed at a location close to the chain arrangement position on the ceiling member 6.

  The shutter curtain 1 has a curtain main body portion 16 that forms most of the shutter curtain 1 and a seat plate 17 attached to the lower end portion of the curtain main body portion 16. This is a slat connecting portion formed by connecting up and down a large number of slats 18 serving as curtain constituent members.

  FIG. 2 is an enlarged front view of a part of the left and right brackets 10 and 11 shown in FIG. 1 and is a partially broken front view. In FIG. ing. At the left end of the winding shaft 13, there is provided a shaft neck member 20 having a smaller diameter than the cylindrical main body portion 19 of the winding shaft 13 and disposed at the center of the main body portion 19. The shaft neck member 20 is coupled to the main body 19 via plate-like core members 21 and 22 attached to the inside of the main body 19 by welding or the like. The left end 20A of the shaft neck member 20 protrudes from the main body 19, and this protruding portion 20A is a sliding bearing or ball bearing disposed on the left bracket 10 out of the two left and right brackets 10, 11. It is supported by the bracket 10 by a bearing member 23 such as a rotatable member. For this reason, the shaft neck member 20 is a central axis of the winding shaft 13 on the bracket 10 side.

  A connecting shaft 30 is disposed coaxially with the take-up shaft 13 on the inner surface of the right bracket 11 facing the take-up shaft 13 of the left and right brackets 10, 11. As shown in FIG. 3, a plurality of, in the present embodiment, two in the axial direction of the connecting shaft 30 are attached to the bracket 11 via bearing members 31, 32 such as sliding bearings or ball bearings. It is arranged so that it can rotate freely. FIG. 3 is a front view showing the periphery of the bearing members 31 and 32 in the connecting shaft 30 of FIG. 2 as a cross section. The bearing member 31 is a bent product of a sheet metal, and includes a support plate 33 attached to the bracket 11 by welding or the like, and a plate-like pressing member 34 fastened to the support plate 33 with a fastening tool such as a screw. It is supported by. The bearing member 32 is supported by a support portion 35 formed on the bracket 11 made of sheet metal and a plate-like pressing member 36 attached to the bracket 11 by welding or the like. The coupling shaft 30 is rotatably supported by the bracket 11 by these bearing members 31 and 32.

  Further, the end 30 </ b> A on the winding shaft 13 side of the connecting shaft 30 is inserted into the main body 19 of the winding shaft 13. A boss member 37 is coupled to the outer periphery of the end portion 30A. As shown in FIG. 4, the outer periphery of the boss member 37 has concave portions 37A and convex portions 37B alternately in the circumferential direction. Is formed. FIG. 4 is a side view of the bracket 11 taken from the winding shaft 13 side, with the connecting shaft 30 being a cross section. As shown in FIGS. 2 and 3, a plate-shaped core member 38 is attached to the inside of the main body portion 19 of the winding shaft 13 by welding or the like. Are formed with a convex portion and a concave portion that engage with the concave portion 37A and the convex portion 37B of the boss member 37, and the winding shaft 13 and the connecting shaft 30 are circumferentially engaged by the engagement of the concave portion and the convex portion. It is connected to.

  With the above structure, the end of the winding shaft 13 on the bracket 11 side is supported by the bracket 11 and the support plate 33 via the connection shaft 30 and the bearing members 31 and 32 and is connected to the winding shaft 13. The shaft 30 rotates integrally with each other, and the connecting shaft 30 is a central axis on the side of the bracket 11 in the winding shaft 13.

  As shown in FIGS. 2 and 3, an opening / closing device 40 serving as a driving device for rotating the winding shaft 13 is disposed on the inner surface of the bracket 11 facing the winding shaft 13. . The arrangement of the opening / closing machine 40 on the bracket 11 is such that a plurality of support members 41 to 44 coupled to the bracket 11 and four in this embodiment, as shown in FIG. This is done by combining 40A (see FIGS. 2 and 3).

  More specifically, the flange portion 40A of the opening / closing machine 40 is formed at the end of the main body portion 40B of the opening / closing machine 40 on the bracket 11 side, and the support members 41 to 44 are respectively The column 11 has a length that extends from the bracket 11 toward the take-up shaft 13, and one of the column members 41 to 44 has a column member 41 as shown in FIG. A rod-like portion 41A that further extends from the top of 41 to the winding shaft 13 side is provided. After this rod-like portion 41A is inserted into the hole 45 formed in the flange portion 40A, a fastening tool 47 such as a screw inserted into the hole 46 of the flange portion 40A from the side opposite to the bracket 11 side is attached to another column. Screw into the respective screw holes 48 formed in the members 42 to 44. Thereby, the opening / closing machine 40 is attached to the bracket 11 by the support members 41 to 44 and the fastening tool 47.

  The attaching operation of the opening / closing machine 40 to the bracket 11 is performed by inserting the rod-like portion 41A of the column member 41 into the hole 45 of the flange portion 40A and then inserting the rod portion 41A into the hole 46 of the flange portion 40A from the side opposite to the bracket 11 side. Since the fasteners 47 are screwed into the respective screw holes 48 of the support members 42 to 44, the screwing operation of the support members 47 to 44 into the screw holes 48 of these support members 47 is performed by the opening / closing device 40. The entire weight can be supported while being supported by the rod-shaped portion 41A of the column member 41. Therefore, the mounting operation of the opening / closing device 40 to the bracket 11 can be performed by one worker.

  The opening / closing machine 40 is composed of a combination of an electric motor and a brake. That is, the drive device for rotating the winding shaft 13 in the present embodiment is a brake-equipped drive device. The rotating shaft of the electric motor is a driving shaft 49 of the opening / closing device 40, and this driving shaft 49 cannot rotate when the brake is turned on. The brake is turned on by electrical means operated by operating means or mechanical means operated manually.

  The drive shaft 49 of the opening / closing machine 40 is attached with a small-diameter drive sprocket wheel 50 which is a drive rotating member in the present embodiment, and the connecting shaft 30 described above is shown in FIG. As described above, a large-diameter driven sprocket wheel 52 which is a driven rotating member in the present embodiment is attached via a thick plate-like base member 51 coupled to the connecting shaft 30, and a drive sprocket wheel 50 is attached. A chain 53 that is an endless traveling member in the present embodiment is wound around the driven sprocket wheel 52. For this reason, the take-up shaft 13 and the opening / closing machine 40 are motively connected via the transmission means including the sprocket wheels 50, 52 and the chain 53 and the connecting shaft 30, and the drive shaft 49 of the opening / closing machine 40 is positively connected. The reverse rotation is transmitted to the winding shaft 13.

  Further, the driven sprocket wheel 52 is attached to the take-up shaft 13 via the connecting shaft 30, and the driven sprocket wheel 52 and the take-up shaft 13 rotate together. The bracket 11 and the support plate 33 are supported via the connecting shaft 30 and the bearing members 31 and 32.

  Of the left and right building housings 3 and 4 shown in FIG. 1, in one of the building housings 4, the shutter curtain 1 is opened and moved upward with respect to the entrance / exit 2, closed and moved downward, and stopped. An operating device 60 is attached to perform the above. The operation device 60 is provided with an “open” button, a “close” button, and a “stop” button.

  When the shutter plate 1 reaches the height position of the lintels 14 disposed on the ceiling member 6 as described above, or when the seat plate 17 has the lintels 14 and the floor 5 as shown in FIG. When the “close” button is operated when the shutter curtain 1 has reached a halfway position (half-open state), the control device (not shown) receives a signal from the “close” button. As the brake 40 is turned off, the drive shaft 49 of the electric motor rotates forward. As a result, the shutter curtain 1 is fed downward from the take-up shaft 13 due to the forward rotation of the drive shaft 49 and the normal rotation of the take-up shaft 13 due to the weight of the shutter curtain 1, and the shutter curtain 1 that is closed and moved thereby is When the plate 17 reaches the fully closed position where the floor 17 is landed, the brake is turned on by the control device that receives a signal from a sensor (not shown) that detects the fully closed position, and the drive shaft 49 is rotated forward. Stop. Further, when the shutter curtain 1 is fully closed or when the seat plate 17 reaches the midway position between the lintels 14 and the floor 5 as shown in FIG. When the “open” button is operated in the semi-closed state), the brake is turned off by the control device that receives a signal from the “open” button, and the drive shaft 49 rotates in the reverse direction. Due to the reverse rotation of the shaft 13, the shutter curtain 1 is wound around the winding shaft 13 and moves open. When the shutter curtain 1 reaches the fully open position, the brake is turned on and the reverse rotation of the drive shaft 49 is stopped by the control device that receives a signal from a sensor (not shown) that detects the fully open position.

  In addition, when the “stop” button is operated while the shutter curtain 1 is being closed and moved, the control device that receives a signal from the “stop” button turns on the brake and causes the drive shaft 49 to rotate forward. In order to stop, the shutter curtain 1 stops at that position. Further, when the “stop” button is operated while the shutter curtain 1 is being opened and moved, the brake is turned on by the control device that receives a signal from the “stop” button, and the drive shaft 49 is reversely rotated. In order to stop, the shutter curtain 1 stops at that position.

  Of the two left and right brackets 10 and 11 that support the take-up shaft 13, the bracket 11 has a function as shown in FIG. An anti-rotation device 70 for stopping the rotation of the driven sprocket wheel 52 is arranged. The arrangement position of the device 70 is an inner surface facing the winding shaft 13 in the bracket 11. 2 and 3, the device 70 is omitted, and FIG. 4 is shown with the aforementioned opening / closing device 40 omitted. 4 shows the state before the chain 53 is cut, while FIG. 6 shows the state after the chain 53 is cut.

  As shown in FIG. 4, the rotation preventing device 70 includes a ratchet device 71 disposed on the bracket 11 outside the driven sprocket wheel 52, a switch 72, and a guard member 73. It has become. More specifically, the device 70 includes a ratchet device 71 that is disposed inside an endless chain 53 that is wound around the drive sprocket wheel 50 and the driven sprocket wheel 52 described above, and a device that is disposed outside the chain 53. And a switch 72 having an actuator 72A and a guard member 73 which is disposed outside the chain 53 and prevents the chain 53 from jumping outside when the chain 53 is cut.

  The ratchet device 71 includes a ratchet member 75 that is rotatable about a central shaft 74, and a spring 76 that constantly urges the pawl portion 75A of the ratchet member 75 to rotate toward the driven sprocket wheel 52. The base end portion is coupled to the ratchet member 75, the actuating member 77 passes between the chain 53 and the bracket 11 and the tip end portion reaches the outside of the chain 53, and the base end portion of the ratchet member 75 is a screw or the like. And a detection member 79 for detecting the breakage of the chain 53. The detection member 79 is placed on the chain 53 from the winding shaft 13 side, and the detection member 79 is made of a hard synthetic resin at a portion facing the outer side surface of the chain 53. A friction reducing member 80 formed by manufacturing or the like is disposed.

  Since the detection member 79 is attached to the ratchet member 75 whose claw portion 75A is always urged to rotate toward the driven sprocket wheel 52 about the central axis 74 by the spring 76, the detection member 79 in the normal state is 4, the friction reducing member 80 is in contact with the outer side surface of the chain 53 by the spring force of the spring 76, and this contact causes the central axis 74 of the ratchet member 75 by the spring 76. A rotation limit centered on is defined. At this time, the claw portion 75A of the ratchet member 75 is separated from the teeth 52A of the driven sprocket wheel 52.

  Since the detection member 79 at this time is in contact with the outer side surface of the chain 53 in the friction reducing member 80, the rotation of the drive shaft 49 of the opening / closing machine 40 for rotating the winding shaft 13 causes endlessness. When the chain 53 which is a traveling member travels, the smooth travel of the chain 53 can be ensured by the friction reducing action of the friction reducing member 80.

  Further, when the wear amount of the friction reducing member 80 reaches a predetermined value and the friction reducing member 80 is replaced, the detection member 79 is covered with the chain 53 from the winding shaft 13 side. Therefore, by removing the fastener 78 that rotatably attaches the detection member 79 to the ratchet member 75, the operation of attaching a new friction reducing member 80 to the detection member 79 can be easily performed. The operation of attaching the member 79 to the ratchet member 75 again by the fastening tool 78 can be easily performed.

  The ratchet device 71 is detachably secured to the bracket 11 with fasteners 81 to 83 such as three screws. The switch 72 and the guard member 73 described above are also fixed to the bracket 11 so as to be detachable with a fixing tool such as a screw.

  FIG. 5 is a side view of the right bracket 11 shown in FIGS. 1 and 2 as viewed from the take-up shaft 13 side, omitting the driven sprocket wheel 52 and the like shown in FIG. It is a figure which shows only the support plate 33 and the support | pillar members 41-44 which are shown by FIG.2 and FIG.3. Further, in FIG. 5, the above-described pressing member 34 shown in FIG. 3 is also omitted. As described above, the support plates 33 which are support members for supporting the driven sprocket wheel 52 together with the bracket 11 are provided at both upper and lower ends as shown in FIG. The base portion 33A that is coupled, the upright portion 33B that rises from the base portion 33A toward the take-up shaft 13, and the main body portion that is installed between the upright portion 33B and is parallel to the bracket 11 It has a hat shape from 33C. Therefore, there is a space S between the main body 33C and the bracket 11, and the driven sprocket wheel 52 is attached to the above-described connecting shaft 30 and disposed in this space S.

  As can be seen from FIG. 4, the ratchet device 71 is disposed on the bracket 11 at a position deviating from the position where the support plate 33 is disposed.

  As shown in FIG. 5, the body portion 33 </ b> C of the support plate 33 is formed with a hole 85 through which the connecting shaft 30 is inserted, and a first hole 86 having a smaller diameter than the hole 85 is also formed. Has been. The position where the first hole 86 is formed is a position corresponding to the outer peripheral portion of the driven sprocket wheel 52 that rotates about the connecting shaft 30. More specifically, as shown in FIG. 4, teeth 52 </ b> A for meshing with the chain 53 are formed at equal intervals in the circumferential direction on the outer peripheral portion of the driven sprocket wheel 52. The recesses 52B are formed at equal intervals in the circumferential direction between the teeth 52A, and the positions where the first holes 86 are formed are the positions of the ratchet device 71 described above among the many recesses 52B. This is a position corresponding to one recess 52B when the claw portion 75A of the ratchet member 75 is engaged with the tooth 52A.

  Further, as shown in FIG. 5, a second hole 87 having the same diameter as the first hole 86 is also formed in the main body portion 33 </ b> C of the support plate 33. The position of the second hole 87 is also a position corresponding to the outer peripheral portion of the driven sprocket wheel 52 that rotates about the connecting shaft 30, and the position of the second hole 87 extends from the first hole 86 to the driven sprocket wheel. The distance between the first and second holes 86 and 87 in the circumferential direction of the outer peripheral part of the driven sprocket wheel 52 is the distance between the teeth 52A (tooth pitch). When t is set and n is an integer including zero, n × t + t / 2.

  A pin-shaped member 90 shown in FIG. 7 is inserted into the first and second holes 86 and 87 from the winding shaft 13 side to the bracket 11 side. The pin-shaped member 90 protrudes into the space S described above between the main body portion 33C of the support plate 33 and the bracket 11, and has a small-diameter portion 90A having a cross-sectional diameter that matches the first and second holes 86 and 87; It has a stepped shape including a large diameter portion 90B having a larger cross-sectional diameter than the first and second holes 86 and 87, and a step portion 90C between the small diameter portion 90A and the large diameter portion 90B. For this reason, if the pin-shaped member 90 inserted into the first and second holes 86 and 87 from the winding shaft 13 side falls out to the space S side, the stepped portion 90C is in the main body portion 33C of the support plate 33. This is prevented by coming into contact with the outer surface of the winding shaft 13 side. Since the pin-shaped member 90 can be extracted toward the take-up shaft 13 with respect to the first and second holes 86, 87, the pin-shaped member 90 has the first and second holes 86, 87. In other words, the pin-shaped member 90 can be attached to and detached from the support plate 33.

  In the present embodiment, the first hole 86 is a first arrangement portion for arranging the pin-shaped member 90 on the support plate 33, and the second hole 87 is the pin-shaped member 90 on the support plate 33. It is the 2nd arrangement | positioning part for arrange | positioning.

  As will be described later, when the chain 53 is cut and rendered non-functional, the claw portion 75A of the ratchet member 75 of the ratchet device 71 engages with the teeth 52A of the driven sprocket wheel 52, whereby the driven sprocket wheel 52 is rotated. It can be stopped. As will be described later, when the pin-shaped member 90 is inserted into the first hole 86 or the second hole 87, the pin-shaped member 90 is also engaged with the teeth 52A of the driven sprocket wheel 52, whereby the driven sprocket wheel 52 is engaged. The rotation of is stopped. For this reason, in this embodiment, the ratchet member 75 of the ratchet device 71 is a rotation stop member for stopping the rotation of the driven sprocket wheel 52 and is a first rotation stop member. Is a member different from the first rotation stop member and is a second rotation stop member for stopping the rotation of the driven sprocket wheel 52.

  Further, the pin-shaped member 90 is engaged with and disengaged from the teeth 52 </ b> A of the driven sprocket wheel 52 by being inserted into and removed from the first hole 86 or the second hole 87.

  When the shutter device according to the present embodiment is used for a long period of time and the number of times of opening and closing the shutter curtain 1 has reached a large number, the above-described chain 53 may be broken due to, for example, metal fatigue. FIG. 6 shows a case where this cutting has occurred. As described with reference to FIG. 4, the ratchet device 71 of the anti-rotation device 70 includes the detection member 79 in which the friction reducing member 80 contacts the outer side surface of the chain 53 by the spring force of the spring 76. When this occurs, the detection member 79 rotates about the central axis 74 due to the spring force of the spring 76, and the ratchet member 75 to which the detection member 79 is attached also rotates about the central axis 74. By the movement, the claw portion 75A of the ratchet member 75 is engaged with the teeth 52A of the driven sprocket wheel 52 that is a member that rotates integrally with the winding shaft 13.

  For this reason, even if the chain 53 is cut and thereby the connection between the driving sprocket wheel 50 and the driven sprocket wheel 52 coupled to the driving shaft 49 of the opening / closing device 40 described above is disconnected, the winding shaft 13 and the driven shaft The ratchet device 71 prevents the sprocket wheel 52 from rotating due to the weight of the shutter curtain 1, thereby preventing the shutter curtain 1 from rotating rapidly by rotating the winding shaft 13 with its own weight. The When the ratchet member 75 rotates about the central shaft 74, the aforementioned operating member 77 coupled to the ratchet member 75 operates the actuator 72A of the switch 72. A notifying means (not shown) for notifying that the chain 53 has been cut operates.

  When the chain 53 is cut as described above, an operation of replacing the cut chain 53 with a new chain 53 must be performed. When performing this replacement work, as shown in FIG. 7, the pin-shaped member 90 is inserted into the first hole 86 serving as the first arrangement portion described above. When this insertion operation is performed, the pin-shaped member 90 is disposed at a position corresponding to the concave portion 52B of the outer peripheral portion of the driven sprocket wheel 52. Therefore, the pin-shaped member 90 is connected to the teeth 52A of the driven sprocket wheel 52. Engage with. The teeth 52A are different teeth 52A from the teeth 52A with which the claw portions 75A of the ratchet member 75 are engaged.

  As a result, the driven sprocket wheel 52 is prevented from rotating by both the ratchet member 75 of the ratchet device 71 serving as the first rotation stop member and the pin-shaped member 90 serving as the second rotation stop member. Thus, the rotation of the driven sprocket wheel 52 is stopped by both the ratchet member 75 and the pin-like member 90, and the winding shaft 13 rotates freely by the dead weight of the shutter curtain when the chain 53 is cut. When it is in a state that can be more reliably prevented, an operation of replacing the broken chain 53 with a new chain is performed.

  As described above, according to the present embodiment, when the chain 53 is cut and the claw portion 75A of the ratchet member 75 serving as the first rotation stop member is engaged with the teeth 52A of the driven sprocket wheel 52, Since the pin-shaped member serving as the second rotation stop member is disposed on the support plate 33, the pin-shaped member 90 can be engaged with the teeth 52A of the driven sprocket wheel 52. This makes it possible to more reliably prevent the take-up shaft 13 from freely rotating due to the weight of the shutter curtain. In this state, the cut chain 53 is replaced with a new chain. It can be done safely.

  Further, when the claw portion 75A of the ratchet member 75 is engaged with the tooth 52A of the driven sprocket wheel 52, the engagement causes deformation of the tooth 52A and the claw portion 75A of the ratchet member 75, and thus the driven sprocket wheel. The rotation stop of 52 may be performed at an angular position shifted from the original rotation stop angle by about half of the interval t between the teeth 52A.

  In such a case, as described above, the pin-shaped member 90 is inserted into the second hole 87 that is the second arrangement portion that is separated from the first hole 86 that is the first arrangement portion. Since the distance between the first hole 86 and the second hole 87 is n × t + t / 2, the pin-like member 90 is engaged with the teeth 52A of the driven sprocket wheel 52 as described above. The driven sprocket wheel 52 is stopped from rotating by both the ratchet member 75 and the pin-shaped member 90. For this reason, also in this case, the operation of replacing the cut chain 53 with a new chain can be performed easily and safely.

  Further, after the operation of replacing the cut chain 53 with a new chain is completed, the ratchet member 75 is rotated back to the original position around the center shaft 74 against the spring force of the spring 76, and the ratchet member 75 is returned. The claw portion 75A is released from engagement with the teeth 52A of the driven sprocket wheel 52, the detection member 79 is covered on the new chain 53 from the winding shaft 13 side, and the pin-shaped member 90 is attached to the first hole 86 or By extracting from the second hole 87, the winding shaft 13 and the driven sprocket wheel 52 can be returned to a rotatable state by the driving force from the opening / closing device 40.

  FIG. 8 shows a pin-shaped member 91 according to another embodiment. This pin-shaped member 91 also projects into the above-described space S between the main body portion 33C of the support plate 33 and the bracket 11 in the same manner as the pin-shaped member 90 of FIG. 7, and the first and second holes 86, 87 A small-diameter portion 91A having a suitable cross-sectional diameter, a large-diameter portion 91B having a larger cross-sectional diameter than the first and second holes 86, 87, and a step portion 91C between the small-diameter portion 91A and the large-diameter portion 91B. It has a stepped shape. And the large diameter part 91B of the pin-shaped member 91 of this embodiment is a screw shaft part in which a male screw is formed on the outer peripheral surface.

  In this embodiment, when the nut member 92 is screwed and tightened to the large-diameter portion 91 </ b> B serving as the screw shaft portion, the pin-shaped member 91 is disposed in a fixed state on the support plate 33. That is, according to this embodiment, the nut member 92 is a fixed-state arrangement member for arranging the pin-shaped member 91 in a fixed state on the support plate 33. Therefore, the pin-shaped member at the time of chain replacement work 91 can be arranged in a fixed state with high strength to the support plate 33 by the nut member 92.

  Further, after the chain replacement work, the pin-shaped member 91 is loosened by engaging a tool such as a screwdriver in the engaging groove 91D provided in the large-diameter portion 91B of the pin-shaped member 91, or the nut member 92 is loosened. Thus, the pin-shaped member 91 can be removed from the support plate 33.

  FIG. 9 shows an embodiment in which the nut member 92 is connected to the main body portion 33C of the support plate 33 in advance by welding or the like. Also in this embodiment, by rotating a pin-shaped member 91 by engaging a tool such as a screwdriver in the engagement groove 91D, the pin-shaped member 91 is made a nut member 92 as a member for fixed state arrangement, and the support plate 33 can be arranged in a fixed state. Further, after the chain replacement work, the pin-shaped member 91 can be detached from the support plate 33 by engaging a tool such as a screwdriver with the engaging groove 91D to loosen the pin-shaped member 91.

  The pin-shaped members 90 and 91 shown in FIGS. 7 to 9 are inserted only into the holes 86 and 87 of the support plate 33. The lengths of these pin-shaped members 90 and 91 are supported. The holes extending from the plate 33 to the bracket 11 are formed in the bracket 11, and holes similar to the holes 86 and 87 of the support plate 33 are formed, so that the pin-like member 90.91 is connected to the holes of the support plate 33 and the bracket 11. The pin-shaped members 90 and 91 may be bridged between the support plate 33 and the bracket 11 by being inserted into the bracket.

  FIG. 10 shows the rotation stopping of the winding shaft 13 and the driven sprocket wheel 52 by transmitting the braking force of the opening / closing device 40 which is a driving device with a brake to the driven sprocket wheel 52 via the driving sprocket wheel 50. 1 shows an embodiment of a coupling device 100 that can be performed. That is, in this embodiment, when the chain 53 is cut and the claw portion 75A of the ratchet member 75 serving as the rotation stopping member of the ratchet device 71 is engaged with the teeth 52A of the driven sprocket wheel 52, the opening / closing machine 40 And the driving sprocket wheel 50 and the driven sprocket wheel 52 are connected by the connecting device 100, whereby the braking force of the opening / closing device 40 is applied to the driven sprocket wheel 52 and the driven sprocket wheel 52. This is transmitted to the winding shaft 13.

  In addition, when the braking force of the opening / closing machine 40 is transmitted to the driven sprocket wheel 52 and the take-up shaft 13 by the coupling device 100 in this way, the first hole 86 or the second hole 87 of the support plate 33 is shown in FIGS. By inserting the nine pin-shaped members 90 or 91, the rotation of the driven sprocket wheel 52 may be stopped by the pin-shaped members 90 or 91.

  The coupling device 100 detachably attached to the driving sprocket wheel 50 and the driven sprocket wheel 52 includes a main body 101 and a plurality of rotating members rotatably arranged on the main body 101. In the embodiment, the plurality of rotating members are first to third rotating members 105 to 107 that are disposed on the main body 101 so as to be rotatable about the first to third central axes 102 to 104. The first to third rotating members 105 to 107 are connected in series. The first rotating member 105 is connected to the driving sprocket wheel 50, and the third rotating member 107 is connected to the driven sprocket wheel 52. Similarly to the driving sprocket wheel 50 and the driven sprocket wheel 52, the second rotating member 106 has teeth 106A formed on the outer peripheral portion at equal intervals in the circumferential direction.

  11 is a cross-sectional view taken along line S11-S11 in FIG. As shown in FIG. 11, the main body 101 of the coupling device 100 is formed by two plate members 108 and 109 that are spaced apart from each other, and the first member is interposed between the plate members 108 and 109. -The 3rd rotation members 105-107 are arrange | positioned rotatably. The first rotating member 105 is provided on two rotating plates 110 and 111 that are parallel to each other with a gap therebetween, and on the outer periphery of the rotating plates 110 and 111, and connects the rotating plates 110 and 111 to each other. A large number of pins 112 are arranged at equal intervals in the circumferential direction of the rotating plates 110 and 111. The pin 112 meshes with the teeth 50 </ b> A (see FIG. 10) of the drive sprocket wheel 50 and the teeth 106 </ b> A of the second rotating member 106. The third rotating member 107 is also provided on two rotating plates 113 and 114 that are parallel to each other with a space therebetween, and on the outer periphery of the rotating plates 113 and 114, and connects the rotating plates 113 and 114 to each other. A large number of pins 115 are arranged at equal intervals in the circumferential direction of the rotating plates 113 and 114. The pin 115 meshes with the teeth 106A of the second rotating member 106 and the teeth 52A (see FIG. 10) of the driven sprocket wheel 52.

  12 is a cross-sectional view taken along line S12-S12 of FIG. The two plate members 108 and 109 forming the main body 101 of the coupling device 100 are coupled by a plurality of column members 116 and screwed into male screw portions formed on the respective column members 116. The plate members 108 and 109 are held at a constant interval by the double nut formed by the two nut members 117 and 118 and the single nut member 119.

  As described above, when the claw portion 75A of the ratchet member 75 serving as the rotation stop member of the ratchet device 71 is engaged with the teeth 52A of the driven sprocket wheel 52 by cutting the chain 53, the brake of the opening / closing machine 40 is as described above. And connecting the connecting device 100 to the bracket 11 shown in FIG. 10 with a clamping tool (not shown) or the like, thereby connecting the first rotating member 105 to the drive sprocket wheel 50, and The three-rotating member 107 is connected to the driven sprocket wheel 52, and the braking force of the opening / closing machine 40 is transmitted to the driven sprocket wheel 52 via the drive sprocket wheel 50 and the coupling device 100.

  When the brake force of the opening / closing device 40 is transmitted to the driven sprocket wheel 52 via the drive sprocket wheel 50 and the coupling device 100 in this way, the cut chain 53 is removed and the coupling device 100 is attached to the bracket. If there is a hindrance when it is placed on 11, it is removed from the bracket 11. In FIG. 10, the switch 72 and the guard member 73 described above are removed, and the detection member 79 is removed from the ratchet device 71.

  When the braking force of the opening / closing machine 40 is transmitted to the driven sprocket wheel 52 via the driving sprocket wheel 50 and the coupling device 100, the rotation prevention of the winding shaft 13 and the driven sprocket wheel 52 is caused by the ratchet member 75 of the ratchet device 71. And the braking force of the opening / closing device 40. Therefore, it is possible to more reliably prevent the winding shaft 13 from freely rotating due to the weight of the shutter curtain 1 when the chain 53 is cut. .

  Then, when the take-up shaft 13 and the driven sprocket wheel 52 are prevented from freely rotating by the weight of the shutter curtain 1 in this way, work that must be performed when the chain 53 is cut, for example, Further, it is possible to easily and safely perform an operation for checking whether or not there is a place where an abnormality has occurred other than the chain 53.

  When the cut chain 53 is replaced with a new chain, the pawl portion 75A of the ratchet member 75 of the ratchet device 71 is maintained with the brake of the switch 40 turned on, as described in the embodiment of FIGS. Is released from engagement with the teeth 52A of the driven sprocket wheel 52, and is moved by inserting the pin-shaped member 90 or 91 of FIGS. 7 to 9 into the first hole 86 or the second hole 87 of the support plate 33. When the rotation of the sprocket wheel 52 is also stopped by the pin-shaped member 90 or 91, the pin-shaped member 90 or 91 is extracted from the first hole 86 or the second hole 87, and then the brake of the switch 40 is turned off. Then, the drive shaft 49 of the switch 40 is rotated. The rotation direction of the drive shaft 49 is a direction in which the winding shaft 13 is rotated forward via the drive sprocket wheel 50, the first to third rotating members 105 to 107 of the coupling device 100, and the driven sprocket wheel 52. Yes, the first to third rotating members 105 to 107 and the driven sprocket wheel 52 are rotated by the rotation of the drive shaft 49, and the shutter curtain 1 is lowered to the fully closed position by the positive rotation of the winding shaft 13. .

  Since the claw portion 75A of the ratchet member 75 of the ratchet device 71 is strongly engaged with the teeth 52A of the driven sprocket wheel 52, the claw portion 75A is released from the engagement with the teeth 52A of the driven sprocket wheel 52. If this is not possible, the drive shaft 49 of the opening / closing machine 40 is slightly rotated in the direction opposite to that described above, so that the claw portion 75A is released from the engagement with the tooth 52A of the driven sprocket wheel 52 and then opened and closed. The drive shaft 49 of the machine 40 may be rotated in the above-described direction so that the shutter curtain 1 is lowered to the fully closed position.

  After the shutter curtain 1 is lowered to the fully closed position in this way, an operation of replacing the cut chain 53 with a new chain is performed. At this time, the connecting device 100 is removed from the bracket 11, and the first rotating member 105 and the third rotating member 107 of the connecting device 100 are separated from the driving sprocket wheel 50 and the driven sprocket wheel 52.

  As described above, when the shutter curtain 1 is lowered to the fully closed position, the take-up shaft 13 and the driven sprocket wheel 52 are less likely to rotate due to the weight of the shutter curtain 1, so that the cut chain 53 is replaced with a new chain. The replacement work can be carried out easily and safely.

  The shutter curtain 1 lowered to the fully closed position may be removed from the take-up shaft 13, and thereafter, the work of replacing the cut chain 53 with a new chain may be performed. According to this, since there is no possibility that the winding shaft 13 and the driven sprocket wheel 52 rotate due to the weight of the shutter curtain 1, the operation of exchanging the cut chain 53 with a new chain can be performed more easily and safely. .

  FIG. 13 shows a coupling device 120 applicable to various shutter devices in which the distance between the driving sprocket wheel 50 and the driven sprocket wheel 52 is different. The two plate members 108 and 109 forming the main body 101 of the connecting device 120 have a first rotation on an arc A centering on the second central axis 103 which is the central portion of the second rotation member 106. A plurality of holes 121 into which the first central shaft 102 of the member 105 can be inserted are formed, two in this embodiment, and the second central shaft 103 of the second rotating member 106 is formed in the two plate members 108 and 109. A plurality of holes 122 into which the third central shaft 104 of the third rotating member 107 can be inserted, three in this embodiment, are formed in the arc B centering on.

  Therefore, after separating the two plate members 108 and 109 by removing the nut member 119 from each of the support members 116 described above, a hole for inserting the first central shaft 102 is selected from the plurality of holes 121. In addition, by selecting the hole into which the third central shaft 104 is inserted from the plurality of holes 122, the interval between the first rotating member 105 and the third rotating member 107 can be changed. By making this change, it is possible to cope with various shutter devices in which the distance between the driving sprocket wheel 50 and the driven sprocket wheel 52 is different.

  For this reason, the connecting device 120 according to this embodiment has versatility with respect to such a shutter device.

  The structure of the connecting device having versatility is not limited to that shown in FIG. 13, and the connecting device having versatility is, for example, an arrangement position of the first central shaft 102 and the third central shaft 104. Can be of the arc-shaped long hole type that can be slid to the respective positions of the arcs A and B.

  The present invention relates to an opening shutter device for opening and closing an opening such as a doorway or a window with a shutter curtain, and a winding shaft for winding and unwinding a shutter curtain that is rotated by an endless traveling member such as a chain. It can be used for various shutter devices such as a shutter device for disaster prevention for forming a disaster prevention zone with a curtain.

DESCRIPTION OF SYMBOLS 1 Shutter curtain 11 Bracket which is a support member 13 Winding shaft 33 Support plate which is a support member 40 Opening and closing machine which is a drive device with a brake 50 Drive sprocket wheel which is a drive rotation member 52 Driven sprocket wheel which is a driven rotation member 53 Endless travel Chain 75, which is a member, and a ratchet member of the ratchet device, which is also a first anti-rotation member 86 First hole, which is the first arrangement portion 87 Second hole, which is the second arrangement portion 90, 91 Second rotation Pin-shaped member 100, 120 which is a stop member 105-107 Rotating member A, B Arc

Claims (7)

A driven rotating member attached to a take-up shaft for winding and unwinding a shutter curtain whose up-down direction is an opening / closing movement direction; and a drive rotating member attached to a drive device for rotating the take-up shaft; An endless traveling member that is wound around the driven rotating member and the driving rotating member and transmits the rotational driving force of the driving device from the driving rotating member to the driven rotating member, and when the endless traveling member is rendered nonfunctional And a rotation stopping member for stopping rotation of the winding shaft by engaging with the driven rotation member or an integrated rotation member integrated with the driven rotation member. In the abnormal descent prevention device,
The anti-rotation member is a first anti-rotation member, and has a second anti-rotation member that is a separate member from the first anti-rotation member, and the second anti-rotation member is the first anti-rotation member. When the member is engaged with the driven rotating member or the integrated rotating member, it is engaged with the driven rotating member or the integrated rotating member ,
The driven rotating member or the integrated rotating member has a plurality of teeth formed in a circumferential direction on an outer peripheral portion, and the second anti-rotation member is inserted and engaged in a recess between these teeth. A shutter curtain rapid abnormal drop prevention device for a shutter device, wherein the shutter curtain member is a member having a pin-shaped portion . 2. The shutter curtain rapid abnormal drop prevention device according to claim 1 , wherein the member having the pin-shaped portion is a pin-shaped member, and the pin-shaped member is the driven rotating member or the integrated rotating member. A shutter curtain rapid abnormal drop prevention device for a shutter device, wherein the shutter member is detachable from a support member that supports the shutter. 3. The shutter curtain rapid abnormal drop prevention device for a shutter device according to claim 2 , wherein the support member is provided with first and second placement portions on which the pin-like member is detachably disposed. The interval between the first arrangement portion and the second arrangement portion is n × t + t / 2, where t is the interval between the teeth and n is an integer including zero. Shutter curtain rapid abnormal drop prevention device. 4. The shutter curtain rapid abnormal drop prevention device for a shutter device according to claim 2 , wherein a hole into which the pin-like member is inserted is formed in the support member, and the pin-like member is inserted into the hole. Thus, the shutter curtain rapid abnormal drop prevention device of the shutter device, wherein the pin-like member is detachably disposed on the support member. 5. The shutter curtain rapid abnormal drop prevention device for a shutter device according to claim 4 , wherein the support member is provided with a fixed state arrangement member for arranging the pin-like member in a fixed state, and is inserted into the hole. Thus, the pin-shaped member disposed on the support member is fixed to the fixed member by the fixed state disposing member and disposed on the support member. A driven rotating member attached to a take-up shaft for winding and unwinding a shutter curtain whose up-down direction is an opening / closing movement direction; and a drive rotating member attached to a drive device for rotating the take-up shaft; When the endless traveling member that is wound around and transmits the rotational driving force of the driving device from the driving rotating member to the driven rotating member becomes nonfunctional, it is integrated with the driven rotating member or the driven rotating member. In the shutter curtain rapid abnormal drop prevention method of the shutter device that stops the rotation of the winding shaft by engaging the rotation stop member with the integrated rotation member that is made,
The anti-rotation member is a first anti-rotation member, and the second anti-rotation member is a member different from the first anti-rotation member, and the anti-rotation member is the driven rotation member or the integrated Engaging with the driven rotating member or the integrated rotating member when engaged with the rotating member;
A step for functionalizing the endless traveling member that has been rendered non-functional;
The includes,
The driven rotating member or the integrated rotating member has a plurality of teeth formed in a circumferential direction on an outer peripheral portion, and the second anti-rotation member is inserted and engaged in a recess between these teeth. A method for preventing a shutter curtain rapid abnormal drop of a shutter device, characterized in that the member has a pin-shaped portion . 7. The shutter curtain rapid abnormal drop prevention method for a shutter device according to claim 6 , wherein the first rotation stop member and the second rotation stop member are used in the step for functionalizing the endless traveling member that has been made nonfunctional. Both are engaged with the driven rotating member or the integrated rotating member, and a shutter curtain rapid abnormal drop prevention method for a shutter device.

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