JPS6122132Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a wire-operated opening/closing device applied to a smoke exhaust port, a smoke exhaust window, a smoke exhaust damper, a smoke prevention damper, etc.

Conventionally, it has been known to use a wire to operate the blades of smoke exhaust ports at rapid intervals to close or open the blades, but since the winding wheel is installed in the operation box, the wire has to be pulled for a long time. There was a drawback that the wire had to be turned and the wire could get caught in the middle, making it impossible to open or close the blades smoothly and reliably when necessary.

In order to eliminate the above-mentioned drawbacks, the present invention provides an opening/closing device for a smoke exhaust port, etc., in which the winding wheel is installed on the outer frame as close to the blade as possible, and the wire is shortened to prevent the wire from getting caught. That is.

An embodiment of the present invention will be described below with reference to the drawings in the case of a smoke exhaust port.

In the figure, 1 is the blade that opens and closes the smoke exhaust port, and the center shaft 2
It is pivotally supported by an outer frame 3, which is a fixed member, and is always urged in the opening direction by a torsion spring 4. 5
1 is an operation box, and a handle 7 to which one end of an operation wire 6 is tied is pivotally supported on the front panel of the operation box so as to be movable up and down.

The other end of the operating wire 6 is guided by a conduit pipe 8 and an outer tube 9, and is tied to a lever 10 of the opening/closing device according to the present invention attached to the outer frame 3.

2 to 4 show the details of this switching device together with its operating state. In these figures, 11 is the casing, and 12 is the casing 11.
A take-up wheel is pivotally supported on the winding wheel, and a lever 10 is pivotally mounted on the same axis. One end of a winding wire 13 is tied to the winding wheel 12, and the other end of the wire 13 is tied to the blade 1. Further, the winding wheel 12 has a gear 14, and the pin 16 of the feed pawl 15 engages with the teeth of the gear to rotate the winding wheel 12 intermittently. Feed claw 15
The middle portion of the arm 17 is pivotally connected to the tip of an arm 17 coaxially connected to the winding wheel 12, and a pin 16 is provided at one end, and a tension spring 18 is provided between the arm 17 and the other end. 19 is a stopper of the feed pawl 15; 20 is a link connecting the lever 10 and the feed pawl 15; within the initial predetermined angle (unlocking range) of the lever 10, the pin 16 of the feed pawl 15 engages with the teeth of the gear 14; They are connected by a long notch 21 and a pin 22 so that they do not fit together. On the opposite side of the gear 14 from the feed pawl 15, a latch 23 is pivotally supported in the middle by the casing 11, and a roller 24 at the tip of the latch 23 is attached to the gear 14.
The roller 25 at the proximal end engages with the teeth of the unlocking link 26.
While the winding wheel 12 is supported at the upper end of the winding wheel 12, the winding wheel 12 does not rotate. The unlocking link 26 is pivotally supported in the middle by the casing 11, and its lower end is connected to the tip of the link 27. Further, the tip of the link 27 is also connected to a plunger 29 of a solenoid 28 that is activated by an electric signal from a smoke detector or the like. The base end of the link 27 is pivotally supported by the casing 11, and the middle part is connected to one end of the link 30 and the pin 3.
1 and a long hole 32. The other end of the link 30 is connected to one end of an operating link 33 pivotally supported on the casing 11. The other end of the operating link 33 is formed into a protrusion 35 that rotates the link 33 by a certain angle when the protrusion 34 provided on the lever 10 passes through the lever 10 while coming into contact with it. This actuates the unlocking link 26 via the links 30 and 27, causing the roller 2 of the latch 23 to actuate.
4 comes off from the gear 14. 36 is a receiving portion of the roller 25 of the latch 23 when unlocked, and 37 is a mounting plate for the conduit pipe 8.

Next, the operation of this embodiment will be explained.

In the state shown in FIG. 2, the blade 1 of the smoke exhaust port is completely closed. In other words, it is in the set state. In this state, the winding wire 13 is wound around the winding wheel 12, so that the blade 1 resists the pressure of the torsion spring 4 and closes the smoke exhaust port. Furthermore, the winding wheel 12 is a gear 14
The roller 24 of the latch 23 engages with the teeth of the latch 23, and the proximal roller 25 is supported by the upper end of the unlocking link 26, so that rotation is prevented by the latch 23. That is, the blade 1 is prevented from opening due to the pressure of the torsion spring 4. Also, at this time, the feed pawl 15 is the gear 1 of the winding wheel 12.
It is in a state where it is separated from 4.

Next, by slightly pulling down the handle 7 of the operation box 5, the operation wire 6 is connected to the lever 10.
When the lever is rotated within the unlocking range, the state shown in FIG. 3 is reached, and the protrusion 34 of the lever 10 comes into contact with the protrusion 35 of the operating link 33, causing the link 33 to rotate via the links 30 and 27. By rotating the unlocking link 26, the roller 25 of the latch 23 falls into the receiving part 36. Therefore, the latch 23 is connected to the gear 1 of the winding wheel 12.
4, the winding wheel 12 becomes completely free and rotates in the reverse direction. Therefore, the blade 1 rotates 90 times under the pressure of the torsion spring 4, and the smoke exhaust port is fully opened. The above is a manual unlocking action, but solenoid 2
8 can also be used to automatically perform a similar action.

In order to set the blade 1 again, the fourth
As shown in the figure, the protrusion 34 of the lever 10 is connected to the operating link 3.
Rotation is repeated within a certain angle (winding range) beyond the protruding piece 35 of No. 3. That is, when the lever 10 is rotated clockwise by the operation wire 6, the pin 16 of the feed pawl 15 is rotated through the link 20 to the gear 14.
When the lever 10 rotates in the opposite direction, the latch 23 engages with the gear 14 and prevents the rotation of the winding wheel 12. At the same time, the feed pawl 15 is separated from the gear 14 by the tension spring 18. In this way, the winding wheel 12 sequentially rotates to completely wind up the winding wire 13, close the blades 1, and finally return to the set state shown in FIG.

As described above, according to the present invention, the winding wheel is installed on the outer frame as close to the blade as possible for winding, so there is no need to run the winding wire connecting the winding wheel and the blade for a long time. This has the effect that the opening or closing operation of the blades is performed smoothly and reliably.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of a smoke exhaust port equipped with an opening/closing device according to the present invention, FIGS. 2 to 4 are diagrams illustrating the operation of the opening/closing device, and FIG. 5 is a bottom view of FIG. 2. 1...Blade, 3...Outer frame, 5...Operation box, 6...Operation wire, 7...Handle, 10...
...Lever, 12... Winding wheel, 13... Winding wire.

Claims (1)

[Scope of utility model registration request] A take-up wire 13 for opening and closing is tied to a blade 1 which is biased by a torsion spring 4 to the smoke exhaust port in a normally open state, and the take-up wire is wound around a take-up wheel 12 attached to an outer frame 3.
A lever 10 is pivotally mounted coaxially with the winding wheel, and one end of an operating wire 6 that is operated from a remote control box 5 is tied to the lever, and the winding wheel 12 has a gear 14. The pin 16 of the feed pawl 15 engages with its teeth to rotate the take-up wheel 12 intermittently, and the feed pawl 15 is attached to the tip of an arm 17 coaxially connected to the take-up wheel 12. A tension spring 18 is mounted between the pin 16 at one end and the arm 17 at the other end.
A link 20 is provided to connect the lever 10 and the feed pawl 15, and the elongated hole 21 and the pin 22 are connected so that the pin 16 of the feed pawl 15 does not engage with the teeth of the gear 14 within the initial predetermined angle of the lever 10. On the opposite side from the feed pawl 15, a latch 23 is pivotally supported in the middle by the casing 11, and the roller 24 at the tip of the latch 23 engages with the teeth of the gear 14, and the roller 25 at the proximal end engages with the teeth of the gear 14. is supported at the upper end of the unlocking link 26, the take-up wheel 12 is prevented from rotating, the middle of the unlocking link 26 is supported by the casing 11, and its lower end is supported by the tip of the link 27. The base end of the link 27 is pivotally supported by the casing 11, and the middle part is connected to one end of the link 30 and the pin 30.
The other end of the link 30 is connected to one end of an operating link 33 that is pivotally supported on the casing 11, and the other end of the operating link 33 is in contact with a protrusion 34 provided on the lever 10. An opening/closing device for a smoke exhaust port, etc., which is formed on a protrusion 35 that allows the link 33 to rotate by a certain angle when passing through.