JPS587018Y2 - Manual closing device for fire doors, etc. - Google Patents

Description

[Detailed description of the invention] This invention mainly operates the brake device, etc. that supports the fire doors installed in the building in an open state in the event of an emergency such as a fire outbreak, to open the fire doors etc. It relates to a device for closing.

Below, the embodiments of the present invention will be explained based on the drawings: 1
is the casing, 2 is the lever, and one end of it is connected to the casing 1.
The other end is pivoted to the lower part of the casing 1, and the other end can be pulled out of the casing 1 from the upper part of the casing 1 using the pivot part 3 as a fulcrum.

Reference numeral 4 denotes a cover attached to cover the entrance/exit at the other end of the lever 2, and is made of a breakable material such as resin glass.

Reference numeral 5 denotes a driving gear that is pivotally supported to rotate in synchronization with the pivot portion 3 of the lever 2, 6 a passive gear that is pivotally supported in the casing 1 so as to mesh with the driving gear 5, and 7 a rotating arm. , is fixed to a support shaft of a driven gear 6 so that when the lever 2 moves from the outside to the inside of the casing 1, it rotates from the top dead center to a position past the bottom dead center.

Reference numeral 8 denotes a link curved in an arc, one end of which is connected to the tip of the rotating arm 7 with a pin 9, and the other end is a long link provided in the casing 1 along a line connecting the upper and lower dead centers of the rotating arm 7. It is connected to a bushing 11 which is slidably engaged in the hole 10.

12 is a roller attached to the bush 11, 13 is a wire connected to the roller 12 at one end, and the other end is connected to a brake device 14 for supporting a fire door or the like in an open state.

Next, the operation of the manual closing device for a fire door or the like having the above-mentioned structure will be explained. As shown in the first diagram, when the lever 2 is housed in the casing 1, the rotating arm 7 passes its bottom dead center. The link 8 moves in a direction to draw the wire 13 into the casing 1, tightens the brake device 14, etc., and supports the fire door etc. in an open state.

In this state, if a fire breaks out and it becomes necessary to close the fire door, etc., break off the cover 4 and use the lever 2.
manually pull it out of the casing 1 as shown in the second figure.

Then, the driving gear 5 rotates, the rotation is transmitted to the passive gear 6, the rotating arm 7 passes through the bottom dead center, then returns to the top dead center, and the link 8 pushes the wire 13 out of the casing 1. , the wire 13 is loosened, the brake device 14 etc. are unfastened, and the fire door etc. are moved from the open position to the closed position.

This invention uses a driving gear and a passive gear that mesh with each other between the lever and the link, as in Narukami, so the force required to operate or push the lever is small, and the lever can be housed within the casing. When the lever is in the position, the rotating arm has moved past the bottom dead center, so even if tension is applied to the wire, the lever will not open. No equipment required.

In addition, despite its simple structure, the stroke can be set freely by simply changing the length of the rotating arms and links.

This means that the object on which the brake is to be released, i.e. the door,
Even if there is a change in the stroke of shutters, smoke prevention panels, etc., it can be easily accommodated.

Furthermore, although the driving gear and the passive gear can be small, the device can be made smaller, which has various effects.

[Brief explanation of drawings]

Fig. 1 is a sectional view of a manual closing device for a fire door, etc. according to the present invention, and Fig. 2 is a sectional view of the device with the lever pulled out.
FIG. 3 is a partially cutaway front view. 1...Casing, 2...Lever, 5
...driving gear, 6...passive gear, 7.
...Rotating arm, 8...Link, 10...
...Long hole, 13...Wire, 14...
・Brake device.

Claims (1)

[Scope of utility model registration request] A lever whose one end is pivoted inside the casing and whose other end can be pulled out from the inside of the casing using this pivot point as a fulcrum, and a drive shaft that is pivoted to rotate in synchronization with the pivot point of the lever. A gear, a passive gear that is pivotally supported in the casing so as to mesh with the driving gear, and a support shaft of the passive gear that moves from the top dead center to the bottom dead center when the lever moves from the outside to the inside of the casing. a rotating arm fixed so as to rotate past the point; one end connected to the tip of the rotating arm, and the other end provided within the casing along a line connecting the upper and lower dead centers of the rotating arm; Avoid links that are slidably engaged in slotted holes or other guideways, and wires that have one end connected to the other end of the link and the other end connected to a brake device such as a fire door. Manual closing device for fire doors, etc.