JPS5810604Y2 - Disaster prevention damper operating device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a disaster prevention damper operating device that operates in the event of an abnormality such as a fire.

Disaster prevention dampers operate in abnormal situations to prevent smoke or remove smoke, but as backup power sources are often used at one time to provide the operating force, the damper operating device requires only a small amount of electricity. It is desirable to operate in

A typical disaster prevention damper is engaged with a cam connected to a damper operating shaft using a pawl-like latch mechanism, and when this pawl is released by an electromagnetic device or the like, the damper operating shaft rotates.

The damper operating shaft is given elasticity in the direction of rotation by a spring or the like, and when the engagement of the pawl is released, the damper operates.

Therefore, the electromagnetic device needs to be large enough to disengage the pawl against the elasticity of the spring.

In such conventional devices, the engagement between the pawl and the cam is strong, so the electromagnetic device must have strong force.

In some cases, a lever mechanism, multiple gears, multiple cams, etc. are used to reduce the force applied to the claw, but this not only complicates the mechanism, but also often limits how it can be used.

For example, when returning a damper to its return position and applying operating force using manual, electric, or pneumatic means, it is desirable that these mechanisms can be used for all operating methods, but such complex mechanisms There are many cases where this prevents dual use.

It is necessary that the retaining mechanism of the cam connected to the damper actuating shaft be as simple as possible, and that the force of the electromagnetic device for releasing the engagement be as small as possible.

FIG. 1 shows an embodiment of the present invention.

Reference numeral 1 denotes a damper operating shaft, and a damper blade (not shown) is fixed to this shaft 1. Rotation of the shaft 1 causes the damper blade to open and close.

The cam 2 is fixed to the shaft 1, and the engagement surface 3 is engaged with a roller 6 which is supported by a shaft 5 at the tip of the support member 4.

Another cam 7 is integrally connected to the shaft 1, and a lever 9 abuts on the cam 7 in order to operate a switch mechanism 8 for fully detecting rotation or non-rotation of the shaft 1.

A piece 11 is supported by a shaft 10 on the support member 4, and a tension force is applied to the piece 11 by a spring 12, so that the support member 4 can be rotated counterclockwise.

The first arm 13 is supported on the other end of the support member 4 by a support shaft 14 .

The first arm 13 is engaged with a second arm 16 via a play mechanism 15, and the second arm 16 is configured to be pulled toward the right in the drawing when the electromagnetic device 17 is energized.

The tensile force of this electromagnetic device 17 is much smaller than that of conventional devices.

The piece 11 supported by the support member 4 is a coil spring 12.
The piece 11 is pressed against the protruding rod 19 of the abnormality detector 18 .

When the temperature of the abnormality detector 17 becomes abnormal due to a fire or the like, the built-in temperature fuse blows out, and at this time the rod 1
When 9 is retracted, the piece 11 is released from its restraint and pivots counterclockwise due to the elasticity of the spring 12.

At this time, the support member 4 similarly pivots counterclockwise, the roller 6 disengages from the cam engagement surface 3, and the damper operates.

When the abnormality detector 18 detects a fire, the damper operates, and in the case of smoke prevention, the damper closes.

The closing operation is performed by either the closing operation of the damper, the blowing of the internal temperature fuse of the abnormality detector 18, or the operation of the electromagnetic device 17.The electromagnetic device 17 is operated by a command from a remote location such as a disaster prevention center, and the damper is closed. When the closing operation is detected by the switch mechanism 8, a forwarding signal or a damper closing operation signal, etc., is transmitted to the disaster prevention center.

The roller 6 and the cam 2 are normally restrained at the positions shown in the figure, but the cam 2 is always biased clockwise by the resilience of a spring (not shown), and the roller 6 is biased clockwise by the resilience of a spring 12. The piece 11 provides elasticity in the counterclockwise direction via the support member 4.

The roller 6 should enter the cam engagement surface as shown in the figure or a little deeper.

When the electromagnetic device 17 is energized, the second arm 16 is pulled to the right in the drawing.

The initial energy of the electromagnetic device 17 is used to pull only the second arm 16 to the right.

Therefore, the energy required for starting is small.

FIG. 2 schematically shows the first arm 13 and the second arm 16 in an exploded view.

The protruding piece 20 of the first arm 13 is inserted into a play mechanism 15 such as a long hole provided in the second arm 16.

When the damper is in the inoperative state, the protruding piece 20 is inserted into the elongated hole 15.
in the center of

When the electromagnetic device 17 is energized, only the second arm 16 is initially pulled to the right, and when the protruding piece 20 moves to the left side of the elongated hole 15, the first arm 13 and the second arm 16 are pulled to the right. move to.

The momentum of the second arm 16 due to the energization of the electromagnetic device 17 is greater than the momentum of the first arm 13, and the momentum of the first arm 13 does not need to be very large.

Although the pulling force of the electromagnetic device 17 is small, the movement of the second arm 16 is fast, and when the protrusion 20 reaches the left end of the elongated hole 15, the second arm 16 moves vigorously to the right. , suddenly applies force to the first arm 13.

The rightward movement of the first arm 13 gives a counterclockwise tilt to the support member 4, and the roller 6 moves while rotating to the left on the cam engagement surface 3. The roller 6 is rotated by the shaft 5 to the support member 4. Although the support member 4 is pivotably supported, it is in frictional contact with the engagement surface 3 and may not rotate sufficiently when the support member 4 is gently tilted.

The rapid tilting movement of the support member 4 rotates the roller 6 sufficiently, and when the center line of the roller 6 approaches the edge of the retaining surface 3, the engagement between the cam engagement surface 3 and the roller 6 is released. , the damper shaft 1 rapidly pivots clockwise and the damper closes.

The second arm 16 is easy to move during starting, so that it is sufficient for the electromagnetic device 1T to possess a small amount of energy during starting, for example, the movable rod of the electromagnetic device 17 has a movement of 2-3 mm. When the distance is reached, the second
Possessing a force large enough to attract the arm 16 1
．． Next, a tensile force is applied to the first arm 13 to rapidly pivot the support member 4 in the counterclockwise direction.

The steep inclination of the support member 4 causes the cam engagement surface 3 to move while imparting sufficient rotation to the roller 6, and when the center line of the roller 6 approaches the edge of the cam engagement surface 3, the roller 6 moves toward the edge. It slides down from the edge, and at this time the restraint of the cam 2 is released.

In the above operation, the starting energy is small and the rotational movement of the roller 6 is performed rapidly.

That is, the play length of the play mechanism 15 is a length necessary so that the starting energy of the electromagnetic device 17 is sufficiently small, and a distance necessary so that a sudden movement can be given to the roller 6.

It is necessary for the roller 6 to be in proper frictional contact with the cam retaining surface 3 at all times, and the cam 2 is reliably held in place unless the electromagnetic device 17 is energized or the abnormality detector 18 is activated. must be restrained.

The roller 6 is engaged on the cam engagement surface 3 at an appropriate depth.

When the cam 2 and the roller 6 are to be engaged again, the damper operating shaft 1 is rotated manually, electrically, or by air pressure.

For example, when the roller 6 is detached from the cam engagement surface 3 and is on the circumferential surface 21 of the cam 2, when the damper operating shaft 1 is rotated counterclockwise, the roller 6 then falls onto the cam engagement surface 3. .

At this time of depression, the protruding piece 20 shown in FIG. 2 returns to the central setting position after moving too far to the right of the center.

In this embodiment, the cross section of the roller 6 is approximately circular.

One end of the support member 4 is pivotally supported by a shaft 5 approximately at the center of this circle.

The cross section of the cam gathering surface 3 is approximately straight. The arc of the roller 6 is pressed against the straight cam engagement surface 3 and is frictionally engaged.

As described above, the present invention prevents the rotation of the cam 2, which is engaged with the damper operating shaft 1, which is elastically biased in the operating direction by the elasticity of a spring (not shown), from the engagement surface of the cam 2. 3, the roller 6 is fixed by a support member 4, and the support member 4 is elastically biased by a spring 12 or the like in a direction opposite to the above-mentioned operating direction, and is normally restrained at the position shown in the figure. However, when an abnormal signal such as a fire occurs, the electromagnetic device 17 is energized and pulls the second arm 16, and the second arm 16 is connected to the support member 4 through the play mechanism 15 and the first arm 13. The motion is given and the above-mentioned restraint is released at this time, and the play length of the play mechanism 15 is such that the starting energy of the electromagnetic device 17 is sufficiently small and the roller 6 can rotate rapidly. The distance required for this purpose is selected.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention; FIG. 1 is a front view, and FIG. 2 is a schematic front view of the main parts. 1... Damper operating shaft, 2... Cam,
3... Cam engagement surface, 4... Support member,
13...First arm, 15...Play mechanism, 16...Second arm.

Claims (1)

[Scope of utility model registration request] A damper operating shaft that is always given elasticity in the operating direction, a cam that is integrally engaged with this shaft, a roller that restrains the rotation of this cam, a support member that pivotally supports this roller, and this support member. A first arm that is engaged with the first arm, a second arm that is engaged with the first arm via a play mechanism, and an electromagnetic device that applies a tensile force to the second arm. , disengaging the roller from the engagement surface of the cam by energizing the electromagnetic device to apply a tensile force to the second arm and pivoting the support member through the first arm; The damper actuating shaft is rotated in the operating direction, and the play length of the play mechanism is such that the starting energy of the electromagnetic device is sufficiently small and the roller suddenly moves to release the restraint from the cam. A disaster prevention damper actuating device characterized in that the distance is necessary for rotational movement.