JPH0258547B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to dampers installed in air conditioning ducts, smoke exhaust ducts, air supply ducts, etc. for buildings, and more specifically, dampers installed in air conditioning ducts, smoke exhaust ducts, air supply ducts, etc. Or it relates to a smoke exhaust or air supply damper with a fire prevention function that is opened.

[Conventional technology]

A conventional damper disclosed in Japanese Patent Publication No. 56-30437 will be explained with reference to FIG.

One end of a first spring 4 is fixed to a shaft 3 that interlocks with the blades 2 of the damper mechanism 1, and the other end of the first spring 4 is fixed to a first hooking member 6 via a connector 5. The first locking member 6 is engaged with the fuse 7 by the bias of the first spring 4, and
A second latching member 9 fixed to the shaft 3 via a boss 8
is latched to the retractable rod 11 of the solenoid 10 by the bias of the first spring 4.

Further, a holding tube 12 fixed to the first latching member 6 is rotatably fitted to the shaft body 3, and one end of a second spring 13 is fixed to this holding tube 12. The other end is fixed to the device frame 15 via a metal fitting 14. The device frame 15 is provided with the fuse 7 described above.

The first spring 4 and the second spring 13 described above are torsion springs whose biasing directions are opposite to each other.

In such a conventional device, when the retractable rod 11 is retracted by the operation of the solenoid 10 from the state shown in FIG. The force causes the shaft 3 to rotate, for example, counterclockwise, and the damper 2 is opened. Thereafter, when the fuse 7 acts and the engagement state with the first latching member 6 is released, the shaft 3 connected to the first latching member 6 via the connector 5 and the first spring 4 is moved to the first latching member 6. It rotates clockwise together with the first latching member 6, and the open damper 2 closes again.

[Problem that the invention attempts to solve]

In the prior art described above, when the engagement between the extension rod 11 of the solenoid 10 and the second locking member 9 is released, the other end of the first spring 4 Since it is fixed by the stop member 6, the first spring 4 operates to rotate the shaft 3, so no problem occurs. However, when the engagement between the first latching member 6 and the fuse 7 is released after such an operation, the first latching member 6 is biased by the second spring 13.
The rotational force of the second spring 13 is transmitted to the shaft 3 via the first spring 4, so in order to guarantee the rotation of the shaft 3 at this time, the biasing force of the second spring 13, that is, the spring force, must be greater than that of the first spring 4. It is also necessary to increase the helix angle or increase the helix angle. Furthermore, in the conventional device, solenoid 1
Although it is possible to open the damper 1 by remotely controlling the damper 0, the operation to return the impeller 2 of the damper 1 to its original position must be performed manually thereafter.

Furthermore, if the re-closing function is not required and the temperature fuse operation type is used, it is not possible to easily change the model. This means that if the second latching member 9 is not disengaged from the extension rod 11 of the solenoid 10, even if the fuse 7 is activated and the first latching member 6 is disengaged from the fuse 7. This is because 3 does not rotate. In order to deal with this, the solenoid 10 and the first spring 4 are omitted,
Although it is possible to use only the second spring 13,
In this case, an extra part is required to connect the second spring 13 and the shaft 3, making the structure complicated. Furthermore, in this case, it becomes impossible to remotely control the operation of returning the blades 2 of the damper 1 to their original state or artificially opening and closing them.

[Cause of the problem]

The second latch member 9 is the retractable rod 11 of the solenoid 10.
When the engagement between the fuse 7 and the first latching member 6 is released from the disengaged state, the second spring 1
3 rotates the shaft 3 together with the first latching member 6. However, since the first latching member 6 is not directly connected to the shaft 3, the member that finally rotates the shaft 3 is the first latching member 6. Spring 4. Therefore, when the second locking member 9 is disengaged from the retractable rod 11 of the solenoid 10, the first spring 4 is in a relaxed state by 90 degrees. Subsequently, in order to rotate the shaft 3 by the biasing force of the second spring 13 as the fuse 7 acts and the first locking member 6 is disengaged, the biasing force of the first spring 4 must be greater than the biasing force of the first spring 4. It is also necessary to apply a large biasing force to the second spring 13.

This invention was made in view of the causes of the above-mentioned problems, and allows the return operation of the damper mechanism to be performed by remote control, and also enables the damper mechanism to be opened or closed by the action of a fuse alone. Moreover, it is an object of the present invention to provide a damper which can be easily changed into two types: a remote control type of the damper and a type in which the damper mechanism is opened or closed by the action of a fuse alone.

[Technical issues to resolve the cause of the problem]

The technical issues for solving the causes of the above-mentioned problems are as follows.

Each spring is provided with a spring force transmitting portion so that the first spring and the second spring do not bias each other.

By using a cylinder as a replacement for a solenoid and providing only one latching member,
Only the return operation when the fuse is activated is manual, and when the damper mechanism is opened by remote control, the return operation is made possible by remote control.

When used as a fuse-operated type that does not require a reclosing function, the first spring described above is omitted and no additional parts are required.

[Means for solving problems]

Technical means for solving the above problems are as follows.

That is, a center shaft interlocked with the vane shaft of the damper mechanism, an outer shaft fitted to the center shaft so as to be relatively rotatable, and a lock pin that selectively switches the center shaft and the outer shaft between a locked state and an unlocked state. A latching member connected to a holding tube that is relatively rotatably fitted to the outer shaft, a torsion coil spring disposed between the device frame and the latching member, and a device frame and the outer shaft. a first spring disposed between the outer shaft and the center shaft, an arm coupled to the outer shaft, a cylinder having a cylinder rod coupled to the arm, and a fuse. The holding tube is provided with a cam member that switches the locking pin to an unlocked state as the holding tube rotates when the locking member is disengaged from the fuse.

[Effect]

As the cylinder is pushed out, the outer shaft rotates together with the arm so as to bias the first spring in reverse rotation. At this time, since the outer shaft and the center shaft are set in a locked state by the lock pin, the center shaft also rotates together with the outer shaft, and the blades of the damper mechanism that are interlocked with the center shaft rotate. When the cylinder is set to the exhaust state from this state, the outer shaft rotates due to the bias of the first spring, and the center shaft that is locked with the outer shaft also rotates, and the cylinder rod of the cylinder is pushed back accordingly. This action causes the blade to rotate in the opposite direction to that in the case described above. However, the fuse and the latching member fixed to the retaining tube which is rotatable relative to the outer shaft are engaged only by the bias of the torsion coil spring.

When the fuse and the locking member are disengaged from this state, the lock pin is switched to the unlocked state by the action of the cam member. Therefore, the biasing force of the second spring acts on the center shaft, causing the center shaft to rotate. Therefore, the blades of the damper mechanism also rotate.

If the reclosing function is not required and the fuse is used, the first spring is not used and only the second spring is used. At this time, one end of the second spring is fixed to the device frame, and the other end is fixed to the center shaft. The biasing direction of the second spring is the direction in which the cylinder rod is pushed back.

With this configuration, the movement of the cylinder rod is transmitted only to the outer shaft, but since the outer shaft is linked to the center shaft by a lock pin, when the outer shaft rotates, the center shaft also rotates, causing the blades of the damper mechanism to rotate. Rotate. Then, when the engagement between the fuse and the locking member is released, the locking pin switches to the unlocked state in the same way as described above, and only the center shaft rotates due to the biasing force of the second spring, causing the blades of the damper mechanism to rotate. rotates. In this case, the outer shaft remains stationary without rotating while being biased by the pushing force of the cylinder.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

In FIG. 1, 20 is a base, 21 is a device frame, and 22 is a cover. 23 is the center shaft and the joint 24
through the vanes 2 of the damper mechanism 1 (see Figure 4).
linked to. An outer shaft 25 is fitted into the center shaft 23 so as to be relatively rotatable. 26 is a lock pin. This lock pin 26 is biased by a spring 28 within a guide frame 27 fixed to the outer shaft 25, and normally passes through the outer shaft 25 and enters the hole in the center shaft 23.
It fits inside 3a. When the lock pin 26 is fitted into the hole 23a as shown in the figure, the outer shaft 25 and the center shaft 23 are set in a locked state, and conversely, when the lock pin 26 has come out of the hole 23a, the outer shaft 25 and the center shaft 23 are locked. 23 is set to the unlocked state. A kick piece 29 is protruded from the lock pin 26. Further, a retaining tube 30 fitted to the outer shaft 25 so as to be relatively rotatable is connected to a latch member 31, and a cam member 32 corresponding to the kick piece 29 is provided. Further, an arm 3 having a long hole 35 is provided in a plate 33 fixed to the outer shaft 25.
4 are integrally provided. 36 is a cylinder,
A connecting fitting 38 is fixed to the tip of the cylinder rod 37, and this connecting fitting 38 is attached to the arm 34 via a pin 39.

Next, 40 is a torsion coil spring, one end of which is engaged with the above-mentioned latching member 31, and the other end is engaged with a metal fitting 41 fixed to the cylinder 36. Furthermore, the locking member 31 with which one end of the torsion coil spring 40 is engaged is engaged with a fuse 42 . That is, the locking member 31 is engaged with the fuse 42 while being biased by the torsion coil spring 40. In this case, the biasing direction of the torsion coil spring 40 is assumed to be clockwise.

Further, one end of a first spring 50 made of a torsion spring is fixed to the outer shaft 25, and the other end is fixed to the device frame 21. In this case the first spring 50
The biasing direction is also clockwise.

On the other hand, one end of a second spring 45 made of a torsion spring is fixed to a boss 44 fixed to the center shaft 23, and the other end of the second spring 45 is attached to a latch piece 46 provided on the plate 33. engaged. In this case, the biasing direction of the second spring 45 is set to be counterclockwise.

When the vanes 2 of the damper mechanism 1 are in the closed state, as shown by solid lines in FIG. 4, the cylinder rod 37 of the cylinder 36 shown in FIG. 1 is pushed out.

When the cylinder 36 is set to the exhaust state from this state, the outer shaft 25 and the lock pin 26 engage the outer shaft 25 and the center shaft 23 in the locked state due to the bias of the first spring 50.
rotate together. Then, the plate 33 and arm 34 fixed to the outer shaft 25 also rotate, and the cylinder rod 37 is also pushed back accordingly. Further, at this time, the second spring 45 rotates together with the outer shaft 25 and the inner shaft 23 having the boss 44. Further, the rotation of the outer shaft 25 at this time does not transmit any rotational force to the latching member 31 because the holding tube 30 is fitted to the outer shaft 25 so as to be relatively rotatable. Since the center shaft 23 is interlocked with the blades 2 of the damper mechanism 1, the rotation of the center shaft 23 opens the blades 2 of the damper mechanism 1 as shown by the imaginary line in FIG.

Further, when the cylinder rod 37 is pushed back and the engagement between the fuse 42 and the locking member 31 is released from the open state of the damper mechanism 1, the second
As shown by arrow A in the figure, the latching member 31 rotates clockwise together with the holding tube 30 by the bias of the torsion coil spring 40. Therefore, the kick piece 29 is kicked outward by the cam member 32 provided on the holding tube 30 against the bias of the spring 28, and the lock pin 26
comes out of the hole 23a of the center shaft 23 as shown by arrow B in FIG. At this time, since the outer shaft 25 is backed up by the cylinder rod 37 via the arm 34 and the connecting fitting 38, the end of the second spring 45 that engages with the locking piece 46 becomes a fixed end. Therefore, the center shaft 23 is rotated counterclockwise by the bias of the second spring 45, and the blades 2 of the damper mechanism 1 are closed as shown by the solid line in FIG.

In the above, a case has been described in which the blades 2 of the damper mechanism 1 open when the center shaft 23 rotates clockwise, and conversely, the blades 2 of the damper 1 close when the center shaft 23 rotates counterclockwise. However, this point is not limited to the above embodiment; for example, when the center shaft 23 rotates clockwise, the blades 2 of the damper mechanism 1 close,
Conversely, it is also possible to have a configuration in which the blades 2 of the damper mechanism 1 open when the center shaft 23 rotates counterclockwise. Regarding this point, in the embodiment described above, one end and the other end of the center shaft 23 have the same configuration, and the blade shaft of the damper mechanism 1 can be connected to either end, so that the cover 22 and the base can be connected to each other. 20
By attaching the frame 21 along with various elements such as the center shaft 23 in an up-down direction, the blades 2 of the damper mechanism 1 close when the center shaft 23 rotates clockwise, and conversely, the center shaft 23 rotates counterclockwise. It is possible to configure the blade 2 of the damper mechanism 1 that rotates to open.

Note that when the vanes 2 of the damper mechanism 1 are opened, smoke exhaust and air supply are possible;
When the blades 2 are closed, a fire prevention effect is achieved.

When the re-closed state is not required and the temperature fuse operation type is used, the first spring 50 is not used and only the second spring 45 is used. At this time, one end of the second spring 45 is fixed to the boss 44 fixed to the inner shaft 23 as described above, but the other end is fixed to the latch piece 46 provided on the plate 33 fixed to the outer shaft 25. It is fixed to the device frame 21 without being combined. Therefore, the plate 33 and the hooking piece 46 are no longer necessary, and the arm 34 is directly fixed to the outer shaft 25. And the second spring 4
The urging direction of 5 is the direction in which the cylinder rod 37 is pushed back.

In this configuration, cylinder rod 3
7 is transmitted only to the outer shaft 25, but the movement of the outer shaft 2
5 is interlocked with the center shaft 23 by a lock pin 26, so when the outer shaft 25 rotates, the center shaft 23 also rotates, causing the blades 2 of the damper mechanism to rotate. When the engagement between the fuse 42 and the locking member 31 is released, the lock pin 26 is switched to the unlocked state, and only the center shaft 23 is rotated by the biasing force of the second spring 45, as described above. The blades 2 of the damper mechanism rotate. In this case, the outer shaft 25 remains stationary without rotating while being biased by the pushing force of the cylinder 36.

Furthermore, by using the cylinder, it was possible to perform remote control. Therefore, the opening and closing of the blades of the damper mechanism can be controlled remotely.

〔Effect of the invention〕

This invention can be implemented as described above, and since the first spring and the second spring do not bias each other, there is no need to make the spring forces and torsion angles of the two different. In addition, we adopted a cylinder instead of a conventional solenoid and provided only one latching member, so only the return operation when the fuse is activated is manual, and when the damper mechanism is opened by remote control, it can be operated remotely. The damper mechanism can be restored by control.

As described above, the damper of the present invention has an improved remote control function, etc., although the structure is simpler than that of the conventional damper. Furthermore, if the re-closing function is not required and a fuse-operated type is used, only the number of parts can be reduced without changing the structure. Furthermore, there is the advantage that model changes are easy.

[Brief explanation of drawings]

Fig. 1 is a partially cutaway side view showing an embodiment of the present invention, Fig. 2 is a cross-sectional view taken along line X-X in Fig. 1, and Fig. 3 is a cross-sectional view taken along line Y-Y in Fig. 1. , FIG. 4 is a sectional view for explaining the function of the damper, and FIG. 5 is a sectional view showing a conventional example. 1... Damper mechanism, 21... Frame body, 23...
Center shaft, 25... Outer shaft, 26... Lock pin, 30
...Holding tube, 31...Latching member, 32...Cam member, 34...Arm, 36...Cylinder, 37...
...Cylinder rod, 40...Torsion coil spring,
42...Fuse, 45...Second spring. 50...
First spring.

Claims (1)

[Claims] 1. A center shaft interlocked with the vane shaft of the damper, an outer shaft fitted to the center shaft so as to be relatively rotatable, a lock pin that selectively switches the center shaft and the outer shaft between a locked state and an unlocked state, and an outer shaft. a retaining member coupled to a holding tube that is relatively rotatably fitted to the retaining tube;
A torsion coil spring disposed between the device frame and the hanging member, a first spring disposed between the device frame and the outer shaft, and a first spring disposed between the outer shaft and the center shaft. a second spring, an arm coupled to the outer shaft, a cylinder having a cylinder rod coupled to the arm, and a fuse, the retaining tube rotates when the locking member is disengaged from the fuse. 1. A smoke exhaust or air supply damper with a fire prevention function, characterized in that a cam member is provided on the holding tube to switch the lock pin to an unlocked state when the lock pin is unlocked.