JPH0673220U - Skylight device - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a skylight device capable of appropriately maintaining a window opening speed and obtaining a reliable cushioning effect when fully opened. [Structure] An electric drum 20 is arranged on one side of a base 19 of the opening / closing unit 18, and the electric drum 20 is fixed to a rotary shaft 26 of a motor. The electric drum 20 is wound with one end 21a of a wire 21 that is pulled when the window member is opened and closed. Base 19
A manual drum 25 is rotatably supported by a shaft 27 on the other side portion. The other end 21b of the wire 21 is fixed to the manual drum 25 at its end and wound around the manual drum 25. A governor mechanism 43 is provided on the back surface of the manual drum 25. The governor mechanism 43 includes a pair of governor balancers 44 pivotally supported on the back surface of the manual drum 25, and a circular governor ring 45 that accommodates the governor balancer 44.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a skylight device having a function of buffering a shock generated when a skylight is fully opened during smoke exhaust or the like.

[0002]

[Prior art]

 Conventionally, as a device having a buffer function, the device shown in FIGS. 7 and 8 has been proposed (see Japanese Patent Laid-Open No. 51-133948). That is, as shown in FIG. 7, the lower end of the window 62 biased in the opening direction by the kick spring 70 is pivotally supported on the lower edge of the sash 61, and the upper end of the window 62 is supported. A pulley 63 is fixed to the. A wire 65 is routed between a pulley 63 fixed to the window 62 side and a pulley 64 fixed to the sash 61 side, and one end side of the wire 65 is fixed to the sash 61 and the other end. The part side is arranged in the winding device 66.

A knob 71 and a handle 72 are provided outside the winding device 66. Further, as shown in FIG. 8, a winding drum 67 and a brake drum 68 fixed to the winding drum 67 are coaxially and rotatably supported inside. The other end of the wire 65 is fixed and wound around the winding drum 67, and a brake band 69 is arranged around the brake drum 68.

One end of the brake band 69 is pivotally supported by a support shaft P2 on one free end of an L-shaped arm 80 rotatably supported by a support shaft P1, and the other end is supported. The arm 78 is rotatably supported by a shaft P3, and is pivotally supported by a support shaft P4 on a free end portion of an arm 78. The other free end of the L-shaped arm 80 is linked to one end of an adjust bar 79 via a spring 81. The adjusting bar 79 is rotatably supported by the support shaft P5, and the other end of the adjusting bar 79 is in contact with the upper end of the adjusting screw 82.

In such a structure, when the knob 71 is operated in an emergency or the like, the winding drum 67 is unlocked and the winding drum 67 becomes rotatable. Therefore, the tension of the wire 65 is released, and the window 62 is biased by the kick spring 70 to rotate in the opening direction.

As a result, the wire 65 is pulled out from the winding drum 67, and the winding drum 67 rotates in the opening direction indicated by the solid arrow. Therefore, the brake drum 68 also rotates integrally with the winding drum 67 and rubs against the brake band 69. Then, as the arms 78, 80 rotate, the L-shaped arm 80 rotates while pressing down the adjusting bar 79 via the spring 81, which causes the brake band 69 to be wrapped around the brake band 69, and the brake band 69 is braked. Braking the drum 68.

Therefore, the rotation speed of the winding drum 67 together with the brake drum 68 is suppressed, and the drawing speed of the wire 65 is also suppressed. As a result, the rotational speed of the window 62 in the opening direction is reduced, which can alleviate the impact when the window 67 reaches full opening. The adjustment screw 82 is screwed or unscrewed to change the reaction force of the spring 81 applied to the other end of the L-shaped arm 80, so that the winding action of the brake band 69, that is, the braking force is changed. Can be adjusted.

[0008]

[Problems to be solved by the device]

 However, in such a conventional device, as shown in FIG. 8, five support shafts P1 to P5 are used. All of the support shafts P1 to P5 serve as the rotation support points of the corresponding members when the action of winding around the brake band 69 occurs as described above. Differences and changes in frictional resistance affect the wrapping action of the brake band 69. For this reason, the winding action of the brake band 69 becomes unstable due to an assembly error of each fulcrum P1 to P5 and a change over time, and as a result, a stable braking force cannot be obtained and a predetermined opening force is not obtained. There is a possibility that it becomes difficult to maintain the speed, the opening speed is lowered more than necessary, and conversely, the braking is insufficient and the buffering of the window 62 is insufficient.

The present invention has been made in view of such conventional problems, and it is an object of the present invention to provide a skylight device capable of properly maintaining a window opening speed and obtaining a reliable cushioning effect when fully opened. It is intended.

[0010]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, in the present invention, a support member having an opening is provided with a window member that rotates to open and close the opening, and a biasing unit that biases the window member in an opening direction. On the other hand, a wire for driving the window member to be opened and closed by winding and pulling out one end side is provided, and the other end side of the wire is wound around a rotatable drum to lock and lock the rotation of the drum. A lock mechanism for releasing the drum and a governor mechanism for braking the drum with a braking force according to a centrifugal force due to the rotation thereof are provided.

[0011]

[Action]

 In the above structure, when the lock mechanism releases the lock of the drum, the drum becomes rotatable. Therefore, the window member biased by the biasing means rotates in the opening direction to pull the wire and pull out the wire wound on the drum. As a result, when the drum rotates, the governor mechanism brakes the drum with a braking force according to the centrifugal force generated by this rotation.

Therefore, when the opening speed of the window member is high and the drum is rotated at a high speed due to the wire being pulled out rapidly, the braking force of the governor mechanism increases, and conversely the opening speed of the window member is low. When rotates at a low speed, the braking force of the governor mechanism is reduced. In other words, the braking force of the governor mechanism changes depending on the rotation speed of the drum and, in turn, the opening speed of the window member, and the drum is braked by the governor mechanism that changes depending on the opening speed of the window member. As a result, the rotational speed of the drum and thus the opening speed of the window member are maintained at a predetermined level.

[0013]

Embodiment An embodiment of the present invention will be described below with reference to the drawings. That is, as shown in FIG. 1, the support 1 is provided with slanted openings 3 and 3 on both sides of a center frame 2 which is installed in the center, and the lower edge of the opening 3 is provided. The window members 4 and 4 are rotatably supported by. Each of the window members 4 and 4 has a surface area capable of closing the opening 3, and a box 8 is provided at the center thereof. A guide hole 9 is formed in the shaft 8 along the longitudinal direction, and one end of a chain stopper 10 is engaged with the other end of the chain stopper 10 is engaged with the center frame 2. . Further, a first window-side pulley 6 and a second window-side pulley 7 are attached to the lower surface of the free end portion of the window member 4.

On the other hand, as shown in FIG. 2, a V-shaped link 11 is supported on the support 1 by a pivot 12 so as to be vertically rotatable. A guide roller 13 is axially supported at one end of the link 11, and the guide roller 13 is rotatably arranged in the guide hole 9. At the other end of the link 11, a coil spring 14 as an urging means is locked, the coil spring 14 extends in a substantially horizontal direction, and an end of the coil spring 14 is locked to the support 1. .

Therefore, the link 11 is urged in the upright direction by the coil spring 14, and the urging of the link 11 causes the guide roller 13 to roll in the guide hole 9 to cause the window member 4 to move. Is driven open. Then, when the guide roller 13 comes into contact with the lower end portion of the guide hole 9, the window member 4 is fully opened. Further, as schematically shown in FIG. 3, the center frame 2 is provided with a pulley 15, a pair of first supporting member side pulleys 16 and 16, and second supporting member side pulleys 17 and 17.

On the other hand, an opening / closing unit 18 is attached to the vertical wall provided on the support 1. As shown in FIG. 4, the opening / closing unit 18 has a base 19, and an electric drum 20 is arranged on one side of the base 19. The electric side drum 20 is fixed to a rotary shaft 26 of a motor (not shown) arranged on the back side of the base 19. One end 21a of a wire 21 is fixed to the electric drum 20 at its end and is wound.

An electric-side slack detection lever 22 is pivotally supported at the lower end of the electric drum 20. The free end of the electric-side slack detection lever 22 is urged in the direction of arrow a. A pin 23 is projectingly provided at a free end portion of the electric side slack detection lever 22, and an electric side slack detection switch 40 is arranged laterally. The one end 21a side of the wire 21 pulled out from the electric drum 20 is inserted into the lower surface side of the electric side slack detection lever 22 to bypass the pin 23, and then is routed on the electric side pulley 24 on the upper side. ing.

On the other side of the base 19, a manual drum 25 (drum) is rotatably supported by a shaft 27. The other end portion 21b of the wire 21 is fixed to the manual drum 25 at its end portion and wound around it. As shown in FIG. 5, a ratchet gear 28 arranged on the rear surface side of the base 19 is coaxially coupled to the manual drum 25 by the shaft 27, and a lock is provided on the lateral side of the ratchet gear 28. A mechanism 29 is provided.

The lock mechanism 29 is provided with a lock lever 31 which is rotatably supported by a pin 30 and which meshes with the ratchet gear 28. One end of a release lever 32 is fixed to a substantially central portion of the lock lever 31, and an operation cord 33 is routed to the other end of the release lever 32 up to an emergency open box (not shown). Is attached. Further, near the release lever 32, there is arranged a stopper 34 having elasticity and a hook-shaped hook portion 34a formed at an end thereof, and the hook portion 34a is pressed against the end surface of the release lever 32. There is.

Therefore, when the operation string 33 is pulled and the release lever 32 rotates about the pin 30, the hook portion 34a of the stopper 34, which is separated from the end face of the release lever 32, releases the release lever 32 as shown by the broken line. The release lever 32 is prevented from pivoting in the locking direction by overcoming the lever 32. When the release lever 32 rotates, the lock lever 31 rotates integrally with the release lever 32, and the engagement with the ratchet gear 28, that is, the lock is released. Therefore, in this state, as described above, the hook portion 34a of the stopper 34 prevents the release lever 32 from rotating, whereby the unlocked state is maintained.

An emergency detection switch 35 is arranged on the side of the front lock lever 31, and a contact 36 is provided on the emergency detection switch 35. The contact 36 contacts the lock lever 31 in a locked state where the lock lever 31 meshes with the ratchet gear 28, and is unlocked when the lock lever 31 is disengaged from the ratchet gear 28. Therefore, due to the non-contact between the contactor 36 and the lock lever 31, the emergency state in which the lock lever 31 is disengaged from the ratchet gear 28 is detected.

Further, on the other side of the manual drum 25, a manual side looseness detection lever 37 having one end fixed to the base 19 is pivotally supported, and a free end of the manual side looseness detection lever 37 is supported by a spring 38. It is biased in the direction of arrow b. A pin 39 is projectingly provided at the free end of the manual side slack detection lever 37, and a manual side slack detection switch 41 is arranged on the urging direction side of the manual side slack detection lever 37. Then, the other end 21b side of the wire 21 pulled out from the manual drum 25 is inserted into the lower surface side of the manual side slack detecting lever 25 to bypass the pin 39, and then on the manual side pulley 42 (see FIG. 4). Has been routed to.

Therefore, in the state where the other end 21b side of the wire 21 is tensioned, as shown in FIG. 5, the manual side slack detection lever 37 receives the tension of the other end 21b and resists the spring 38. Then, it is away from the manual side slack detection switch 41. However, when the other end 21b of the wire 21 is loosened, the manual looseness detection lever 37 is driven by the spring 38 to rotate and comes into contact with the manual side looseness detection switch 41. Thereby, the looseness of the other end 21b of the wire 21 is detected. The operations on the electric side slack detection lever 22 and the electric side slack detection switch 40 side are the same as those on the manual side. Therefore, when the one end 21a of the wire 21 is loosened, the electric side slack is detected. This is detected by the detection switch 40.

The wire 21 having the one end 21a side wound around the electric drum 21 and the other end 21b side wound around the manual drum 25 side as described above is schematically shown in FIG. After being installed between the electric pulley 24 and the manual pulley 42 between the second window pulleys 7 and 7, they are installed between the second support pulley 17 and 17 and the first support pulley 16 and 16. Further, it is arranged between the pulleys 6 and 6 on the first window side and on the pulley 15.

On the other hand, a governor mechanism 43 is provided on the back surface of the manual drum 25. As shown in FIG. 6, the governor mechanism 43 includes a pair of governor balancers 44 and 44, and a circular governor ring 45 that can accommodate the governor balancers 44 and 44. The governor balancers 44, 44 are point-symmetrical members, have an arcuate outer peripheral surface 46, and support shafts 47, 47 that are inserted into one end that is in a point-symmetrical position. It is rotatably supported on the back surface 25a.

The governor ring 45 is fixed to the base 19 (see FIG. 4) by brackets 49, 49 provided on the peripheral portion in a state where the governor balancer 44, 44 is accommodated. In FIG. 6, the clockwise direction indicated by the arrow is the direction in which the manual drum 25 rotates when the window member 4 is opened. Therefore, when the manual drum 25 rotates in the opening direction, the governor balancers 44, 44 have the base end portion 51 side pivotally supported by the support shaft 47 as the leading end and the free end portion 48 side as the rear end. It is configured to rotate.

In the present embodiment having the above-described structure, a predetermined amount of wire 21 is wound around the electric drum 20 in advance, and the lock lever 31 of the lock mechanism 29 is engaged with the ratchet gear 28. The locked state is formed. In this state, when the motor is operated to rotate the electric drum 20 in the counterclockwise direction (arrow open direction) as shown in FIG. 2, the wire 21 wound around the electric drum 20 is pulled out, The wires 21 arranged as described above loosen. Then, the link 11 biased by the coil spring 14 rotates in the upright direction, and the guide roller 13 rolls in the guide hole 9, whereby the window member 4 is driven to open. When the guide roller 13 comes into contact with the lower end of the guide hole 9, the window member 4 is fully opened.

When the electric drum 20 continues to rotate counterclockwise after the window member 4 is fully opened, the wire 21 is loosened as a whole. Then, the electric-side slack detection lever 22 rotates in the direction indicated by the arrow "a" and comes into contact with the electric-side slack detection switch 40, whereby the slack of the other end 21a of the wire 21 is detected. Similarly, the slack of the other end 21b of the wire 21 is also detected by the rotation of the manual-side slack detection lever 37 driven by the spring 38 and contact with the manual-side slack detection switch 41. Therefore, unnecessary rotation of the motor is avoided by stopping the motor in response to the signals from the slack detection switches 40 and 41.

When the electric drum 20 is rotated in the clockwise direction (arrow closing direction) as shown in FIG. 2 by reversing the motor, the wire 21 is wound around the electric drum 20 at the one end side 21a. To be Therefore, the wires 21 between the first pulleys 6 and 6 and the second window-side pulleys 7 and 7 provided on the window members 4 and 4 are shortened, and the window members 4 and 4 have free ends. It is pulled in the direction of proximity. Therefore, the window members 4 and 4 rotate while rotating the link 11 in the tilting direction against the coil spring 14, and are fully closed when the free end reaches the center frame 2. The full closing of the window member 4 is detected by a limit switch (not shown), and the motor is stopped by a signal from the limit switch.

In the fully closed state or the half-opened state, when smoke emission is required in an emergency, the operation cord 33 arranged up to the emergency open box is pulled. Then, the lock lever 31 rotates integrally with the release lever 32 and disengages from the ratchet gear 28. Further, when the release lever 32 rotates, the hook portion 34a of the stopper 34 is displaced to a position where the release lever 32 has been overcome, as shown by the broken line in FIG. 5, and the release lever 32 rotates in the locking direction. Blocked and unlocked. When the front lock lever 31 rotates to the unlocked state, the contact 36 of the emergency detection switch 35 separates from the lock lever 31, the emergency detection switch 35 is turned on, and the motor circuit is cut off.

On the other hand, the manual drum 25 released from the ratchet gear 28 and released from the locked state is rotationally driven by the tension generated on the wire 21 by the urging force of the coil spring 14, and is shown in FIG. Rotate clockwise, which is the opening direction. As a result, the other end 21b side of the wire 21 wound around the manual drum 25 is pulled out.

When the manual drum 25 rotates in the opening direction, the governor balancers 44, 44 rotate integrally with the manual drum 25, and the free end 48 is swayed in the radial direction of the manual drum 25 by the centrifugal force. Therefore, the outer peripheral surfaces 46 of the governor balancers 44, 44 are brought into sliding contact with the inner peripheral surface 50 of the governor ring 45 to generate frictional resistance, whereby the manual drum 25 is braked.

At this time, the governor balancers 44, 44 rotate with the base end 51 side pivotally supported by the support shaft 47 being the head and the free end 48 side being the tail. Therefore, when rotating in the opposite direction, that is, when rotating with the free end portion 48 at the beginning and the base end portion 51 side as the rear end, the free end portion 48 has the inner peripheral surface of the governor ring 45. It does not act on the bite 50. Therefore, the manual drum 25 is braked only by the frictional resistance between the outer peripheral surfaces 46 of the governor balancers 44 and 44 and the inner peripheral surface 50 of the governor ring 45 without causing this biting action.

Moreover, this frictional resistance changes according to the centrifugal force received by the governor balancers 44, 44 according to the rotation speed of the manual drum 25, and the governor mechanism is provided with a braking force according to the centrifugal force due to the rotation of the manual drum 25. 43 brakes the manual drum 25. Therefore, when the opening speed of the window member 4 is high and the manual drum 25 rotates at high speed due to the wire 21 being pulled out rapidly, the braking force of the governor mechanism 43 increases, and conversely, the window member 4 When the opening speed of the motor is low and the manual drum 25 rotates at a low speed, the braking force of the governor mechanism 43 is reduced.

That is, the braking force of the governor mechanism 43 changes depending on the rotation speed of the manual drum 25, and thus the opening speed of the window member 4. Therefore, the braking force of the governor mechanism 43, which changes depending on the opening speed of the window member 4, brakes the manual drum 25, so that the rotation speed of the manual drum 25 and the opening speed of the window member 4 are increased. Maintained in place. Therefore, the link 11 biased by the coil spring 14 rotates in the upright direction, the guide roller 13 rolls in the guide hole 9, and abuts against the lower end of the guide hole 9 to contact the window member 4. When it is in the fully open state, it is possible to reliably absorb the impact at the time of full opening.

Note that once the operation string is pulled to perform the emergency release, all the wires 21 are pulled out from the manual drum 25, so a situation occurs in which the emergency release cannot be performed next. However, since the circuit of the motor that drives the electric drum 20 is cut off by turning on the emergency detection switch 35 described above, the rotary shaft 26 of the motor cannot rotate. Therefore, even if all the wires 21 of the manual drum 25 are pulled out, the operation of further operating the motor to wind the wire 21 around the electric drum 20 is prevented.

When the window member 4 is emergency opened by exhausting the smoke in this manner and then returned to the normal use state, a handle (not shown) is set on the manual drum 25, and the manual drum 25 is set. 25 is rotationally driven in the counterclockwise closing direction, and a predetermined amount of wire 21 is wound around the manual drum 25. Thereafter, when the release lever 32 is rotated to a position where it abuts on the hook portion 34a of the stopper 34, the lock lever 31 meshes with the ratchet gear 28, and the lock state is restored again. Further, when the lock lever 31 is rotated to the locked position, the emergency detection switch 35 is turned off, the circuit of the motor which has been cut off is restored, and a normal usable state is formed. .

[0038]

[Effect of device]

 As described above, according to the present invention, when the window member is emergency opened, the drum, which rotates and the wire is pulled out, is braked by the governor mechanism that generates the braking force according to the centrifugal force due to the rotation. . Therefore, the braking force of the governor mechanism changes depending on the rotation speed of the drum and, in turn, the opening speed of the window member.By braking the drum by the governor mechanism, the rotation speed of the drum cannot be extended. The opening speed of the window material can be maintained at a predetermined level. Therefore, the window opening speed can be appropriately maintained without excess and deficiency, and as a result of the opening speed being appropriately maintained, it is possible to obtain a reliable cushioning effect at the time of full opening.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention.

FIG. 2 is a schematic front view of the same embodiment.

FIG. 3 is a schematic plan view of the same embodiment.

FIG. 4 is a perspective view of the opening / closing unit of the embodiment.

FIG. 5 is a front view showing the configuration of the opening / closing unit on the manual drum side.

FIG. 6 is an exploded perspective view of a governor mechanism provided on the manual drum side.

FIG. 7 is a perspective view showing a conventional device.

FIG. 8 is a cross-sectional view showing the main parts of the same device.

[Explanation of symbols]

 3 Opening 4 Window member 14 Coil spring (biasing means) 21 Wire 25 Manual drum (drum) 29 Lock mechanism 43 Governor bar mechanism 44 Governor balancer 45 Governor ring

Claims (1)

[Scope of utility model registration request] 1. A support having an opening is provided with a window member that pivots to open and close the opening, and urging means for urging the window member in the opening direction is provided, while one end side is wound. A wire is provided for driving the window member to be opened and closed by being pulled and pulled out, the other end of the wire is wound around a rotatable drum, and a lock mechanism for locking and unlocking the rotation of the drum is provided. A skylight device having a governor mechanism for braking a drum with a braking force according to a centrifugal force generated by the rotation of the drum.