JPH063626Y2 - Fire damper device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial field of application> The present invention relates to a fire protection damper device installed in the middle of an air conditioning duct system.

<Prior Art> Conventionally, as a fire damper device, a thermal fuse using a molten alloy is generally attached to the temperature sensing portion, but recently, a shape memory alloy has been used as an alternative to the thermal fuse. The product used as a sensing function member was developed. A typical example of this is Shoukai 63-596.
The structures disclosed in Japanese Patent No. 59, Japanese Utility Model Laid-Open No. 57-15736, and Japanese Utility Model Laid-Open No. 61-103156 are known.

The applicant of the present invention has also focused on the development of a fire damper device using a shape memory alloy for the past 10 years. (Japanese Utility Model Laid-Open No. 58-10861, Japanese Utility Model Laid-Open No. 58-10862, Japanese Utility Model Laid-Open No. 58-11933) And, particularly, the applicant's focus is to develop a shape memory of a tension spring shape. It was to reduce the required operating force required for the alloy.

Also, as a disaster prevention device, how to ensure the reliability of operation of this fire damper was to develop a disaster prevention device that is easy to maintain.

<Problems to be Solved by the Invention> However, the fire damper devices described in each of the above publications have a large number of parts and have a complicated structure. Therefore, manufacturing and assembling are complicated, which causes a high cost. Also, since there are many parts, there was concern about the reliability of operation. Furthermore, there is a problem that maintenance is difficult.

The present invention was devised based on the above-mentioned development policy, and unlike the above-mentioned conventional fire damper device, the required operating force required for the shape memory alloy is reduced, and the structure is made compact to operate. It is an object of the present invention to provide a fireproof damper device that guarantees the reliability of the fire protection and is easy to maintain.

<Means for Solving the Problems> The above object of the present invention can be achieved by a damper device having the following configuration. That is, the gist is that a ridge portion is provided around the inner wall surface of the duct, and both ends of a damper blade having a shape such that the peripheral line portion is anchored on the ridge portion are pivotally supported on the duct wall, and one end of the duct is attached. A damper vane closing mechanism, which is a penetrating wall and has an operating shaft, an opening / closing handle is attached to the tip of the operating shaft, and the damper vane is always biased by a spring member in the closing direction. Through a through hole for inserting a closing actuation mechanism, the tip of the damper blade and the actuating lever supporting member whose base end are located in the vicinity of the opening / closing handle are pivotally attached to each other in the middle of the actuating lever supporting member. A shape that is contracted by a set temperature between the tip of the operating lever and the tip of the operating lever supporting member, The damper blade is provided between the closing operation mechanism that is connected to the storage alloy and that can be freely attached to and detached from the duct, the opening / closing handle, and the operation lever support member and the base end portion of the operation lever. The fire-damping device is provided with a lock member that is locked in an open state and that is unlocked by contraction of the shape memory alloy.

(Embodiment and Action) Hereinafter, a damper device according to the present invention will be described in detail with reference to the drawings showing the embodiment.

FIG. 1 is a cross-sectional explanatory view of a main part of a damper blade closing mechanism A of the present invention, in which a ridge (2) is provided on the inner peripheral surface of a cylindrical duct (1) so as to project therefrom. The peripheral portion of the damper blade (3) is moored to the part (2) to close the duct (1), and the damper blade (3) is integrated with the rotating shaft (4). It is mounted, and both ends of which are rotatably supported by the blade bearing parts (5) and (5), and one end of which is penetrated to the outside of the duct (1) to form the working shaft (6). is there. The working shaft (6) is
It is contained in the operation shaft housing (7) having an upper end opening, and the opening / closing handle (8) is attached to the tip of the operation shaft (6).
As shown in FIG. 2, the opening / closing handle (8) has a connecting hole (9) penetrating through the center thereof, and the connecting shaft (9) has the operating shaft.
(6) is inserted, and the nut member (11) is fastened and fixed to the threaded portion (10) provided around the distal end thereof. Further, a spring mooring piece (12) is formed on the outer circumference of the opening / closing handle (8), and a coil spring member (13) provided between the operating shaft (6) and the operating shaft housing (7) is provided. An upper end is moored to the spring mooring piece (12) and a lower end is moored to the bottom of the actuating shaft accommodating portion (7), so that the duct (1) is always closed. Is.

Next, FIG. 3 is a sectional view of a main part of the closing operation mechanism B of the present invention, showing the duct (1) near the damper blade (3).
A closing actuation mechanism insertion hole (14) is formed through the body wall, and the base of the actuation lever support member (15) is inserted into the closing actuation mechanism insertion hole (14) near the opening / closing handle (8). The operation supporting member (15) is provided so as to be positioned, and is fixed to the base detachably provided on the body wall of the duct (1) with screws or the like. Further, in the middle of the operation lever support member (15), the middle of the operation lever (16) is pivotally attached, and the base end of the operation lever (16) and the base end of the operation lever support member (15) are connected to the spring member ( 17), the operation lever support member (15) tip and the operation lever (16) tip,
The operating lever support member (15) and the operating lever (16) are opened and closed by projecting on the operating lever support member (15). It is regulated by a pin (17) and a mooring hole (18) which is penetrated by an operating lever (16) into which the pin (17) is inserted.

Further, a coil-shaped shape memory alloy portion C that contracts at around 70 ° C. is provided at the tips of the operation lever support member (15) and the operation lever (16).

Therefore, as shown in FIG. 4, the base of the lock member (19) is pivotally attached to the outer peripheral edge of the opening / closing handle (8), and the locking recess (20) is formed on the outer peripheral edge of the lock member (19). The recess (20) is a mechanism for mooring with a locking pin member (21) projecting from the opening edge of the operating shaft housing (7), and the tip of the lock member (19) is the operating lever support member. (15) The mechanism is loosely fitted in the fitting groove (22) formed in the base and is moored in the mooring groove (23) at the base end of the operating lever (16). That is, the lock member (19) rotates the opening / closing handle (8) when the damper blade (3) is rotated by the opening / closing handle (8) to close the inside of the duct (1). With the above lock member
The locking recess (20) and the locking pin member (21) of (19) are anchored to each other, and by further rotating the opening / closing handle (8), the locking member (19 The distal end is fitted in the fitting groove portion (22) formed in the base portion of the operating lever support member (15) and is anchored in the mooring groove portion (23) at the proximal end of the operating lever (16). Also the above duct (1)
Working lever support member (15) and working lever inserted into
The closing operation mechanism B composed of (16) is configured so as to be detachable with screws or the like.

In the present invention having the above-described structure, as shown in FIGS. 5 and 6, when the temperature in the duct (1) rises to around 70 ° C., the shape memory alloy member A in the duct (1) is However, by contracting as shown by the imaginary line in the figure, the operating lever
The base end side of (16) pivots downward, the tip of the lock member (19) is released from the mooring groove (23) of the operating lever (16), and the lock member (19) is opened and closed by a handle ( Since it is pivotally attached to 8), it is locked by the biasing direction toward the closing direction.
The (20) abuts on the locking pin member (21) and rotates downward, and the locking recess (20) of the opening / closing handle (8) and the locking pin member (2
The mooring with 1) is released, and the damper blade (3) is rotated by the urging force of the coil spring member (13) to close the inside of the duct (1). That is, the lock portion (9) uses the length of the arm of the lock member (19) to reduce the force applied to the lock member (19) according to the principle of leverage, and thus the mooring groove portion (2).
The mechanism is such that the locking force with 3) can be pressed with a minimum force, and by releasing it, the mooring with the opening / closing handle (8) is released.

It should be noted that although the cylindrical duct has been described in detail in the above embodiment, the present invention can be applied to other shapes, for example, a rectangular duct, and the shape of the damper blade and the duct closing mechanism can be changed according to the shape of the duct. Are considered as appropriate.

<Effect of the Invention> As described above, according to the present invention, the locking member causes the closing operation mechanism to operate with a small acting force, so that the operating force of the shape memory alloy may be small, so that reliable and low cost is achieved. It can be fully utilized with the material cost of.

Also, by making the closing mechanism detachable, maintenance and manufacturing are very easy, and the number of parts is small and the structure is compact, so the failure rate is low,
The certainty of operation is guaranteed. In addition, various effects such as a reduction in the overall manufacturing cost are achieved.

[Brief description of drawings]

FIG. 1 is an explanatory sectional view of a main part showing a closing mechanism of a damper blade of the present invention, FIG. 2 is an explanatory view showing a mounting state of an opening / closing handle of the present invention, and FIG. 3 is an explanatory view showing a closing operation mechanism of the present invention. FIG. 4 and FIG. 4 are enlarged explanatory views of the same main part, and FIGS. 5 and 6 are explanatory views showing the usage state of the present invention. In the figure, A: Damper blade closing mechanism B: Closure operating mechanism C: Shape memory alloy member (1): Duct (2): Protrusion (3): Damper blade (6): Operating shaft (8): For opening and closing Handle (13): Coil spring member (14): Closure actuation mechanism insertion hole (15): Actuation lever support member (16): Actuation lever (19): Lock member

Claims (1)

[Scope of utility model registration request] 1. A means for urging a damper blade in a closing direction,
A damper device having a blade stopper and an opening / closing handle is provided with a closing operation mechanism insertion hole projectingly provided in a damper wall, and a tip end portion thereof is disposed outside a rotation region of a damper blade through the closing operation mechanism insertion hole. Further, an operating lever supporting member whose base end is fixed to the damper outer wall, an operating lever pivotally attached to the operating lever supporting member and always biased in the closing direction, the operating lever tip and the operating lever. A closing operation mechanism having a shape memory alloy contracted by a set temperature, which is provided between the tip end portion of the support member and the closing operation mechanism that can be freely attached to and detached from the damper outer wall. The damper blade is locked between the operation lever support member and the operation lever base end in an open state, and the lock is released by contraction of the shape memory alloy. Configured urchin, moreover fire damper device being characterized in that a lock member occupying become small the required actuation force of the shape memory alloy has a predetermined arm length.