JPH0450041Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention relates to a fire prevention damper device, which ensures the installation of a disc-shaped damper when shutting off the damper in an air-conditioning duct in a mid-to-high-rise building, etc. The degree of opening of a disc-shaped damper in a duct passage can be reliably adjusted with a simple one-touch operation, and a separate member is used as a closing part to block the passage in the duct, and a damper is engaged with the separate member. The purpose is to simplify the shape and improve the blocking efficiency.

[Conventional technology]

Generally speaking, this type of fire prevention damper device is
Conventionally, the devices described in Japanese Utility Model Publication No. 56-33551 and Japanese Utility Model Publication No. 56-48278 have been known.

As shown in Figures 6 and 7, the former of the two devices has an elastic locking pawl 4 that engages and disengages from a locking pin 3 associated with a heat sensing fuse 14, and an operating plate on which a tightening bolt 9 is fixed. 8, an operating body 5 equipped with a damper opening adjustment device 13 that displaces an opening adjustment plate 12 along a long hole 10 is connected to the damper shaft 1 via a return spring 6. ing.

The latter has a damper locking protrusion 2 integrally formed on the inner circumferential surface of the duct 7, and a damper 16 whose center portion is fixed to the damper shaft 1 is connected to a heat sensing fuse 14 for opening the damper. The return spring 6 of the damper opening/closing device, which is adjustable in temperature, is forcibly closed in the event of a flame outbreak, etc., and both peripheral edges of the damper 16 are held in confidential pressure contact with the opposing surfaces of the locking protrusion 2 on both sides. It has a structure like this.

On the other hand, in order to form the damper locking protrusion, a separate member is provided instead of integrally forming a bulge on the inner circumferential surface of the duct, as shown in Figs. 8 and 9.
The invention of No. 52-39357 is known. The above idea is
A plurality of peripheral members 3 that divide the circumference of the blade body into upper and lower parts
A stopper ring 2 divided into upper and lower halves is used to lock the damper 3 attached to the vane shaft 9 with 1 to _{3 o} .
₁ and ₂ are installed on the inner surface of the duct 7.

[Problem to be solved by the invention] However, in both the above-mentioned former and latter, the inner peripheral surface of the duct 7 is integrally formed to bulge in order to form the damper locking protrusion 2, and furthermore, the damper opening degree is changed. Tightening bolt 9 fixed to operation plate 8 for adjustment
loosely inserted into the long hole 10 bored in the opening adjustment plate 12,
An opening adjusting plate 12 with an operating handle 11 protruding from one side is loosely fitted onto the damper shaft 1 and overlapped, and both plates are tightened while maintaining a predetermined positional relationship, and are integrally connected with bolts. There is. Therefore, a bending escape part must be formed in the damper 16 by the width w of the bulging convex strip 2. Therefore, the flow path in the duct becomes narrow due to the area of the bent portion, and since the convex striped surface ₂₁ formed integrally with the duct serves as a bearing for the damper mounting shaft 1, the thickness of the duct 7 alone is insufficient. There are some problems with the strength of the bearing part.

In addition, to adjust the damper opening, the bolt 9 must be loosened and then tightened again, which is troublesome, and the operating body 5 is provided with another operating plate on the bottom surface of the opening adjustment plate 12. A plate 8 had to be installed.

On the other hand, the stopper ring proposed in Utility Model Publication No. 52-39357 is divided into upper and lower halves and is symmetrical in pairs, so it is not possible to simply divide one ring body into two; It is necessary to manufacture a circular stopper, adjust its position in the duct, and install it, and the damper 3 must have a number of peripheral members 3 ₁ to 3 _o attached around the blade body, making operation difficult. This is troublesome and the structures of the damper and stopper ring are also complicated.

[Means to solve the problem]

Therefore, in order to solve the above-mentioned conventional problems and achieve the object of the invention, the present invention provides a fire prevention damper device with an annular edge that locks a disc-shaped damper that blocks a duct passage on the inner diameter surface of a cylindrical duct. At the same time, the operating body of the disc-shaped damper is connected to the damper mounting shaft, and the serrated stopper attached to the outer edge of the operating body is connected to the outer edge of the operating body via the spring body. make it appear from the body part,
The degree of opening of the damper is adjusted by engaging the sawtooth stopper with a locking pin of a heat sensing unit.

[Effect]

The operation based on the above means will be explained as follows. First, when the disk-shaped damper 2 is rotated using the handle 41 of the operating body 4 against the return spring 8, the locking pin 94 of the heat sensing unit 9 hits the saw-toothed back surface of the stopper 5, and the locking pin 94 of the heat sensing unit 9 hits this. Therefore, when the sawtooth tip protrusion ₉₄₁ passes, the stopper moves in the direction of the damper mounting axis against the spring 8, causing the outer edge of the operating body 4 to retract, and when it enters the sawtooth recess, it returns to its original position. Therefore, when the damper 2 is engaged with the locking pin 94 of the heat sensing unit 9 at the desired position of the sawtooth recess, the damper 2 is positioned parallel to the passage of the duct 1 and maintained in the open state.

When the fuse body 97 of the heat sensing unit 9 senses heat due to a fire or other abnormally high temperature inside the duct 1 and the fusible metal melts, the locking pin 94 sinks into the outer edge of the operating body. In order to disengage the serrated stopper, the damper mounting shaft 20 rotates together with the operating body 4 by the restoring force of the return spring 8, and the damper 2, which is integrated with these, is attached to the perforated disc body 3 with an annular edge in the duct. Rotate until it comes in close contact with the duct to block the passage inside the duct.

In order to reopen the damper 2 which has been shut off due to the melting of the fuse body 97 of the heat sensing unit 9, after replacing the melted fuse body 97 with a new one and setting it, the handle portion 41 of the operating body must be pressed against the return spring. 8
When the sawtooth of the stopper 5 is engaged with the locking pin 94 of the heat sensing unit 9 by rotating in the restoring direction against It will be released.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings. 1
2 is a cylindrical duct, and 2 is a disk-shaped damper for blocking the passage on the inner diameter surface of the cylindrical duct, and is supported on the upper and lower surfaces of the duct via a mounting shaft 20.

3 is a perforated disk body with a rising annular edge that is engaged when the damper blocks the passage in the duct, and the surface of the rising annular edge ₃₁ is fixed to the inner diameter surface of the duct by welding or the like.

4 is a handle portion 41 for setting the opening angle of the damper 2 with respect to the duct inner diameter with respect to the mounting shaft 20;
A stopper 5 having a sawtooth 51 formed in a long hole 6 opened in the direction of the damper mounting axis is attached via a connecting shaft 7 so as to be freely protrusive and retractable from the outer edge of the operating body. . The sawtoothed stopper is normally actuated in the outward advancing direction from the outer edge portion of the operating body 4 by a spring 8 passed between the stopper and the coupling shaft 7, and is engaged with the locking pin of the heat sensing unit.

Reference numeral 9 denotes a heat sensing unit, in which a middle cylinder 92 is inserted into a cylinder shaft 91 and its upper end is fixed to the cylinder shaft 91 via a plug 93, and a locking pin 9 is further inserted into the middle cylinder.
4 is inserted so that its upper end 94 ₁ protrudes upward from the plug 93, and the large diameter portion 94 of the base of the locking pin is inserted.
₂ and the lower surface of the plug body of the middle cylinder, and a fuse that melts by sensing high heat between the hanging member 96 provided at the large diameter part of the locking pin and the middle cylinder 92. The bodies 97 are connected.

Reference numeral 10 denotes a case 1 provided between the operating body 4 and the upper surface of the duct in order to store the damper 2 in the duct and accumulate a closing action toward the perforated disc body 3.
1 shows a damper return spring housed within 1.

[Effect of idea]

Since the present invention has the above-mentioned configuration, the degree of opening of the damper in the duct can be adjusted by operating the handle of the operating body and at the same time retracting and retracting the serrated stopper against the spring, and setting the serrated stopper. The angular position can be easily and reliably adjusted by engaging the sawtooth recess with the locking pin.

In addition, the disc body that locks the damper when it is cut off has a rising annular edge, so the edge surface is fixed to the inner diameter surface of the duct, and the disc body with a hole is made as thin as the plate thickness. The edges of the damper can be reliably brought into close contact with each other, and efficient circulation can be achieved without impairing the flow rate in the duct when the damper is opened.

Furthermore, since the rising annular edge is fixed to the inner surface of the duct, when a bearing hole for the damper mounting shaft is provided in the duct, the rising annular edge is drilled through the hole, which serves as reinforcement and increases strength.

[Brief explanation of the drawing]

Fig. 1 is a plan view of a fire prevention damper device according to the present invention, Fig. 2 is a central cross-sectional view of Fig. 1, Fig. 3 is a sectional view taken along line 3-3 of Fig. 1, and Fig. A vertical sectional view of the heat sensing unit, FIG. 5 is a plan view showing the operating state of the operating body and the sawtooth stopper and damper shown in FIG. 1, FIG. 6 is a plan view of the conventional product, and FIG. 6 is a side view, FIG. 8 is a longitudinal sectional side view showing another example of the conventional product, and FIG. 9 is a front view of the damper in FIG. 8. 1... Cylindrical duct, 2... Disc shaped damper,
3... Perforated disc body with annular edge, 4... Operation body, 5
... Stopper with saw teeth formed, 6 ... Long hole, 7
... Connection shaft, 8 ... Spring, 9 ... Heat sensing unit, 10 ... Damper return spring, 11 ... Case, 20 ... Mounting shaft, 41 ... Handle of operating body,
51... Sawtooth, 91... Cylinder shaft, 92... Middle tube, 9
3... Plug body, 94... Locking pin, 95... Coil spring, 96... Hanging member, 97... Fuse body.

Claims (1)

[Scope of utility model registration request] An annular edged disc body 3 that locks a disc-shaped damper 2 that blocks the duct passage on the inner diameter surface of the cylindrical duct 1
At the same time, the operation body 4 of the disc-shaped damper is connected to the damper mounting shaft 20, and the sawtoothed stopper 5 attached to the outer edge of the operation body is attached via the spring body 8 to the outer edge of the operation body. A fire prevention damper device characterized in that the degree of opening of the damper is adjusted by causing the sawtooth stopper to protrude and retract from a portion and engaging the locking pin 94 of the heat sensing unit 9.