JPS642934Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a manual closing device for fireproof shutters installed at building entrances, passageways, etc. In particular, in the event of a fire, the power supply (including emergency power supply) for the shutter opening/closing machine is This invention relates to an occasional manual closing device which is capable of smoothly and quickly closing a shutter by releasing a brake mechanism built into the opening/closing machine by remote control of a manual push button when the shutter is shut off.

Conventionally known manual closing devices of this type include, for example, the following. That is, as shown in FIGS. 2 and 3, a manual push button 10 is provided in a box 8 having a window 9 that can be pushed open on the front surface, and a movable lever 11 is provided at the tip of this push button 10. When the push button 10 is pressed, the lever 11 is pushed by the rod 10a attached to the push button and tilts as shown by the imaginary line in FIG. It is configured to operate a release lever 5 of a brake mechanism built into the opening/closing machine at any time.

By the way, what is shown in Fig. 1 is an example of a brake release mechanism, and reference numeral 1 is a camshaft for operating the brake mechanism, and the brake arm 2 fixed to this camshaft 1 is shown as an imaginary line in Fig. 1. When tilted as shown in , the brake mechanism is released. As shown, a plunger of a solenoid 3 is connected to one end 2a of the brake arm 2, and under normal conditions, the solenoid 3 is energized to release the brake mechanism and lower the shutter under its own weight. Further, a brake release lever 5 is provided below the brake arm 2 and is always urged upward by a spring 4. As described above, this lever 5 is moved to the movable lever 1 by operating the pushbutton 10.
1 tilts, the wire 12 is pulled and the third
The actuating member 5a rotates the rotating member 6 by operating downward as shown by the imaginary line in the figure. Further, a roller 6a is attached to the upper part of the rotating member 6, and this roller 6a is formed to engage with a locking protrusion 7a. This locking protrusion 7a is integrally formed on the side surface of the release member 7, which is always urged upward by a spring 8, and is normally pulled down by a roller 6a against the urging force of the spring 8. stuck in a state. When the rotating member 6 is rotated as shown by the imaginary lines in FIGS. 4A and 4B, the engagement between the roller 6a and the locking protrusion 7a is disengaged, and the release member 7 is moved upward by the force of the spring 8. , brake arm 2 is the fourth
Solenoid 3 tilts as shown by the imaginary line in Figure C.
The brake mechanism was released in the same way as when energized.

However, one problem with such conventional devices is that the amount of movement of the wire 12 is smaller than the amount of displacement of the push button 10. That is, since the push button 10 and the movable lever 11 etc. that are tilted by it are mounted inside a small and thin box 8 that is usually embedded in the wall of a building, the amount of displacement of the push button 10 and the displacement of the movable lever 11 is Of course there are limits. Especially with conventional equipment,
As shown in FIG.
Since the wire 12 is simply tilted diagonally using the end of the button 1a as a fulcrum to pull the wire 12 downward in FIG. The amount of movement l is
The amount of displacement was only 1/3 or less of L. Therefore, if the push button 10 is pushed in 12 mm, the wire 1
The amount of movement in No. 2 was 3 mm or less. This means that when installing this device, if there are variations in the wire length or if the wire stretches after installation,
Press the brake release lever 5 with the push button 1.
It is not possible to rotate it by the necessary angle in response to the zero push. As a result, it was sometimes impossible to release the brake mechanism and close the shutter under its own weight.

The purpose of this invention is to eliminate the above-mentioned drawbacks and to provide an optional manual closing device that can reliably release the brake mechanism by pressing the push button and close the shutter smoothly and quickly.

Next, embodiments of this invention will be described with reference to the drawings. FIG. 5 is a partially cutaway side view of the box of the present invention, and FIG. 6 is a perspective view showing the internal mechanism of the same.

In the figure, reference numeral 21 denotes a box with a bottom fixed to the wall of the building, and a door 22 having a window 23 that can be pushed through is attached to the front of the box.

Incidentally, the window portion 23 can be formed from a synthetic resin plate such as a transparent acrylic plate, and the window portion is provided with a thin wall portion 24 so that it can be easily destroyed by pressing force from a finger or the like in an emergency. is set in advance.

The reference numeral 25 is a wire for releasing the brake mechanism of the shutter opening/closing machine as described above, and this wire 25 is introduced into the box 21 through the hole 21a provided on the top surface of the box 21.
It is fixed by a clip 27a so as to be wrapped around the winding drum 27 through the jacket 26. code 28
is an inner frame provided in the box 21, and a push button 29 is disposed inside the inner frame 28 and the window 23 so as to be perpendicular to the window 23, and a push rod 30 with a screw is attached to one end of the push button 29. to support. The threaded push rod 30 is screwed into a threaded portion 29a provided at the bottom of the push button 29, and the locking nut 29
A screw hole 31a is provided in the piece 31, which is fixed by the screw hole 31b and has a rack 32 on one side at its end.
and is fixed by a locking nut 31b. Further, a return spring 33 is installed inside the piece 31, and the piece 31 is arranged so that when a pressing force is applied in the axial direction of the threaded push rod 30, the return spring 33 returns the push rod 30 to its normal state.
is being pressed from below. And code 34 is piece 3
1 is attached to the machine frame, 34a is a long guide groove provided in the machine frame 34, and a guide pin 31c protruding from the piece 31 is inserted into this long groove 34a. Reference numeral 35 is a board provided at the bottom of the box 21, and a machine frame 34 is mounted on this board.
Reference numeral 36 is a gear that engages with the rack 32 and is pivotally supported by the machine frame 34. Reference numeral 36a designates a rotating shaft of the gear 36, to which a boss portion 27b of the wire winding drum 27 is fixed.

Note that one end of the wire 25 is connected to the brake release lever 5 for releasing the brake mechanism of the shutter opening/closing machine.

Next, the operation of the device of the present invention constructed as described above will be explained. If a fire breaks out and the power to the shutter opening/closing machine is cut off, if you break the acrylic plate of the window 23 with your finger or the like and press the push button 29, the push rod 30 will cause the piece 31 to return to the spring 33. Piece 31 moves forward against the resistance.
A rack 32 engraved on the front face of the gear rotates a gear 36. Since the wire winding drum 27 is integrally fixed to the rotating shaft 36a of the gear 36, when the gear 36 rotates, the wire winding drum 27 also rotates, and the wire 25 is wound around the winding drum. The wire is pulled downward as shown in FIGS. Since the wire rotates the brake release lever 5, the brake mechanism is released and the shutter starts to lower under its own weight.

In this way, the present invention is configured such that when the push button 29 is pressed, the wire winding drum 27 is rotated via the rack pinion to wind up the wire 25 and pull it. can be several times higher than that of the conventional type (see Figure 3). Even in that case, the mechanism of the present invention is simple in construction and does not occupy a large space. That is, since the wire winding drum 27 and the gear 36 are fixed together, the diameters of the winding drum and the gear can be appropriately determined to reduce the amount of gear 36 per stroke of the push button 29.
If the rotation angle of the wire winding drum 27 is increased, the rotation angle of the wire winding drum 27 that follows it also becomes larger, so the amount of wire winding becomes several times the amount of wire movement in the conventional type, and therefore the brake connected to the wire can be released at any time. The lever 5 can be rotated by the required angle, and the linear movement of the push button is converted into the rotational movement of the winding drum by the rack pinion, so that it can be placed inside the thin and small box 12. It is convenient in that it can be easily installed, and exhibits excellent practical effects.

[Brief explanation of the drawing]

Fig. 1 is a schematic front view showing an example of a brake release mechanism in a shutter opening/closing machine, Figs. 2 and 3 are a schematic front view and a schematic sectional view of the internal mechanism of a conventional shutter manual closing device, and Figs. 4A and 4B. 4C is an explanatory view showing the relationship between the brake release member and its operating wire, FIG. 5 is a partially cutaway side view of the device of the present invention, FIG. 6 is an enlarged perspective view of the same, and FIGS. 7 and 8 are FIG. 2 is a schematic front view showing the relationship between the push button, the rack and pinion mechanism, the wire winding drum, and the wire. 5: Brake release lever at any time, 21: Bottomed box, 23: Window part that can be broken out, 24: Thin wall part,
25: wire, 27: winding drum, 28: inner frame, 29:
Pushbutton, 30: Pushrod with screw, 3
1: Piece, 32: Rack, 33: Return spring, 34:
Machine frame, 35: Board, 36: Gear (pinion), 3
6a: Rotation axis.

Claims (1)

[Scope of utility model registration request] A shutter opening/closing machine comprising a brake mechanism and a brake release lever for releasing the brake mechanism, and a push button disposed inside a box with a breakable window on the front so as to be perpendicular to the window. Inside the same box, a push rod attached to the tip of the push button is attached so that it can be pushed and pulled, and when a pushing force is applied to this rod, it operates against a return spring and releases the pushing force. In the shutter manual closing device, the shutter manual closing device includes an actuating part that returns to a normal state when the brake is pressed, and a wire for operating the lever stretched between the actuating part and the brake occasional release lever, wherein the actuating part is connected to a push rod. a mounted rack; a gear that engages with the rack;
1. A manual closing device for a shutter, comprising a wire winding drum fixed to the gear shaft, and the operating wire is fixed to the wire winding drum so as to be able to be wound thereon.