JPH038789Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to an opening/closing device for a smoke exhaust window.

Conventionally, in order to close a smoke exhaust window installed in a high place in a building, a handle is first inserted into a wire winding drum, and then the wire is wound around the drum by rotating the handle and the window is closed. Therefore, when closing the window, there was a problem in that it took time and effort to take the handle out of its storage location and return it after use.

Also, when you push the button, the drum's reverse prevention device is released and a spring opens the window, so if you leave the handle inserted in the drum, it will rotate with the drum as the wire rewinds. There was also the problem that the moving handle could hit the hand pressing the button, creating a danger.

This invention aims to eliminate the above-mentioned drawbacks by providing a handle on the drive shaft of the drum and keeping the handle stationary during unwinding of the wire.

This idea incorporates a wire winding drum that rotates together with the drive shaft in a box, and also provides a disk on the drive shaft with a clutch interposed therein, which acts so that it is free only when winding the wire. A stop device for stopping the rotation of the plate and a push button for unlocking the stop device are provided, and a handle for free rotation is provided on the drive shaft, and when the handle is driven in the winding direction of the wire, To provide a window opening/closing device capable of driving a drive shaft by meshing with a vehicle.

Hereinafter, embodiments of this invention will be described based on the accompanying drawings.

In the figure, reference numeral 1 denotes a box, and the box 1 is provided with a freely rotating drive shaft 2 whose tip protrudes from the front wall of the box 1.

The drive shaft 2 in the box 1 also includes a wire winding drum 3 which rotates together with the drive shaft 2, and a disc 13 with a clutch 4 interposed therebetween, which acts on the drive shaft 2 to be free when winding the wire. is provided.

Furthermore, inside the box 1 is a stop device A that prevents the drum 3 from reversing when the wire winding is finished.
is provided.

The above-mentioned stop device A is a disk 13 in the case shown.
A plate-like body 6 is placed on one side of the upper edge and has its tip supported by a pin 5, and a pin 7 is placed above the drum 3.
A rocking body 8 whose upper end is rotatably supported by a shaft, an elevating plate 36 whose upper end is connected to the upper end of this rocking body 8 via a pin 35, and a lower end of this elevating plate 36 and the end of the plate-like body 6 are rotated. A pin 9 movably connected, and a shaft 10 protruding from the side surface of the plate-shaped body 6 toward the disk 13.
, a large number of notches 11 for engaging the shaft 10 provided on the periphery of the disk 13, and a spring 12 that presses down the end of the plate-shaped body 6. When the rotational force is applied, the disk 13 tends to rotate together via the clutch 4.

At this time, the engagement between the notch 11 and the shaft 10 prevents the rotation of the disc 13, thereby preventing the drum 3 from reversing.

A ratchet wheel may be used instead of the disc 13 having the notch 11, and a pawl may be used instead of the shaft 10.

Although the spring 12 described above is a leaf spring interposed between the top wall of the box 1 and the upper edge of the swing plate 8, it may also be a traction spring that pulls down the end of the plate-shaped body 6.

Further, a button 14 is provided on the front wall of the box 1 to release the stop device A when pressed.

The above-mentioned button 14 is made to pass through the box 1 by applying a restoring force by a spring 15, and a pin 16 protruding from the rocking plate 8 is brought into contact with the end of the button 14, and the button 14 is pushed counterclockwise in FIG. While rotating the rocking plate 8 in the direction, the elevating plate 36 is raised and the end of the plate-shaped body is pulled up so that the shaft 10 is removed from the notch 11. Further, a handle 17 that rotates freely is provided at the tip of the drive shaft 2, and a rotary plate 18 that is located inside the handle 17 and is free relative to the drive shaft 2,
A gear 21 with a required number of pawls 20 supported on the peripheral edge of the rotary plate 18 via a pin 19 and an internal gear 22 provided on the handle 17 around the drive shaft 2 are engaged, and the handle is moved in the wire winding direction. When the gear 17 is rotated, each gear 21 is rotated by the internal gear 22, and the pawl 23 and the pawl 2 provided on the drive shaft 2 are rotated.
0 mesh with each other to drive the drive shaft 2 in the wire winding direction.

Further, a lock device B is provided which prevents the raised elevating plate 36 from lowering when the swinging plate 8 is rotated by pushing the button 14.

The above-mentioned locking device B is a lifting plate 36 in the illustrated case.
a notch 24 provided on the vertical edge of the button 14 side;
It is composed of a dog-shaped pawl 26 that is pivotally supported on the box 1 via a pin 25, and a spring 27 that gives the pawl 26 rotatability so that the upper end of the pawl 26 fits into the notch 24. ing.

Further, the front wall of the box 1 is provided with a slide rod 28 for releasing the locking device B when the box is immersed.

The above rod 28 is connected to the through hole 2 in the front wall of the box 1.
9 so that the front end of the lower end of the claw 26 comes into contact with the claw 26 and is pushed back by the spring 30.

Further, the handle 17 is provided with a plate cam 31 that rotates together with the rotary plate 18 and causes the rod 28 to retract.

In addition, as shown in the figure, the gripping rod 34 of the handle 17
By making the gripping rod 3 foldable,
The inconvenience caused by the protrusion of No. 4 can be solved.

In the figure, reference numeral 32 denotes a centrifugal brake, and since this centrifugal brake 32 is actuated from the drum 3 through a group of gears 33, it is possible to prevent sudden unwinding of the wire.

The window opening/closing device according to this invention has the above-mentioned structure, and its operation will be explained next. When closing the open window door C as shown in FIG. When the handle 17 is gripped and turned clockwise in FIG. 4, each gear 2 is rotated by the internal gear 22.
Since the pawl 20 of the gear 21 is engaged with the pawl 23 while rotating the handle 17, the drive shaft 2 and the drum 3 are driven together with the handle 17, and the wire D is wound around the drum 3.

At this time, since the drive shaft 2 is freely rotated with respect to the disc 13 by the clutch 4, the disc 13 is stopped due to the engagement between the notch 11 and the shaft 10.

When the door C is completely closed, a rotational force in the rewinding direction of the wire acts on the drum 3, which attempts to reverse the drive shaft 2. On the other hand, due to the action of the clutch 4, the drive shaft 2 is rotated in the opposite direction. 13 becomes the same body.

For this reason, the drum 3
is prevented from reversing (rotation of the wire D in the unwinding direction), and the door C remains closed.

Also, after winding the wire D, the handle 17
The handle 17 is reversed so that the gripping rod 34 is located directly below the drive shaft 2 (even when it is located, it is rotated 360 degrees).

At this time, since each gear 21 is rotated by the internal gear 22 as the handle 17 is reversed, the pawl 20 is removed from the ratchet wheel 23.

Next, to open door C, push button 14.

As the button 14 is pressed, the swinging plate 8 is rotated counterclockwise in FIG. 10 is removed, the claw 26 is fitted into the notch 24 and locked, thereby preventing the elevating plate 36 from descending.

Therefore, the wire D is rewound by the spring acting on the door C in the opening direction, and the drum 3 is rotated in the rewound direction.

At this time, the drive shaft 2 rotates together with the drum 3, while the handle 17 remains stationary.

When the handle 17 is turned in conjunction with the closing of the door C, the slide rod 28 is pushed in by the rotating plate cam 31 and the pawl 26 is rotated counterclockwise in FIG. 26 comes off.

Therefore, the spring 12 rotates the rocking plate 8 clockwise in FIG.
The shaft 10 is engaged with the notch 11 by lowering the end thereof.

As described above, according to the window opening/closing device of this invention, when the handle is turned to close the door,
While rotating the gear with the internal gear of the handle, engage the pawl of the gear with the pawl of the drive shaft,
The drive shaft and drum are rotated together with the handle to wind up the wire, and after the door is closed, the handle can be reversed to release the engagement between the ratchet wheel and the pawl, so the handle rotates when the door is opened. prevent them from doing so.

Therefore, accidents caused by rotation of the handle can be eliminated.

Moreover, the inconvenience of attaching and detaching the handle one by one and the loss of powder on the handle are eliminated.

Furthermore, a disc is provided on the drive shaft via a clutch that becomes free when winding the wire, and a notch on the circular edge of this disc is engaged with the shaft of the stop device to rotate the drum after winding the wire. The shaft is removed from the notch by pressing the button, and
Since the disk rotates together with the drum, the door can be opened and closed quietly without making any noise.

[Brief explanation of the drawing]

Fig. 1 is a side view showing the device according to the invention in use, Fig. 2 is an enlarged vertical side view of the device, Fig. 3 is a longitudinal front view of the same, Fig. 4 is a partially cutaway rear view of the handle, and Fig. 4 is a partially cutaway rear view of the handle. FIG. 5 is a longitudinal sectional side view showing the function of the stop device, and FIG. 6 is a perspective view of the same. A... Stop device, B... Lock device, C...
...Door, D...Wire, 1...Box, 2...Drive shaft, 3...Drum, 4...One clutch, 5...
... Pin, 6 ... Plate-shaped body, 7 ... Pin, 8 ... Rocking body, 9 ... Pin, 10 ... Shaft, 11 ... Notch,
12... Spring, 13... Disk, 14... Button,
15... Spring, 16... Pin, 17... Handle, 18... Rotating plate, 19... Pin, 20...
Pawl, 21...gear, 22...internal gear, 23...
Ratchet wheel, 24... Notch, 25... Pin, 26...
...Claw, 27...Spring, 28...Slide rod, 29
...Through hole, 30...Spring, 31...Plate cam, 32
... window brake, 33 ... gear, 34 ... gripping rod, 35 ... pin, 36 ... lifting plate.

Claims (1)

[Scope of utility model registration request] a box; a wire winding drum built into the box to rotate together with the drive shaft;
A disc is provided with a clutch interposed therebetween, which acts on the drive shaft so that it is free when rotating in the winding direction of the wire, a stop device that stops the rotation of this disc, and a lock of this stop device is released. A push button provided on the stop box, a notch portion and pawl that engage with each other provided to maintain the unlocked state of the stop device, and the engagement of the pawl, cut pawl, and notch portion when pushed into the box is released. A slide rod provided as shown in FIG. It consists of a gear pivotally supported on a rotary plate that is free from the shaft, a pawl provided on this gear, a ratchet wheel provided on the drive wheel to engage with the pawl, and a plate cam provided to push the slide rod into the handle. Window opener.