JPH06241551A - Damper - Google Patents

Abstract

PURPOSE:To highly improve the response of an opening/closing blade while keeping the lower fabrication cost with a simplified structure by quickly fully opening the opening/closing blade when the blade is opened exceeding the certain degree of opening. CONSTITUTION:There are provided an opening/closing blade 16 rotatably in a vent port to open and close the vent port through which air flows and a guide lever 28 fixed to the opening/closing blade 16 at a predetermined angle. The guide lever 28 is provided so as to rotate drawing a circular arc while moving from side of a horizontal line 200 to the other side beyond the horizontal line as the opening/closing blade 16 is opened and closed, and a freely sliding weight 30 is provided on the guide lever 28 so as to freely slide along the guide lever 28 following the circular arc movement. Hereby, the blade is fully opened on a stretch with the set degree of opening.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention
Alternatively, the present invention relates to a damper device capable of maintaining a constant pressure difference between the inside and the outside of the room.

[0002]

2. Description of the Related Art In electronic parts, precision machine parts, factories, control rooms, etc. for foods, pharmaceuticals, etc., in order to avoid dust, it is necessary to keep the room pressure higher than the outside pressure to maintain a positive pressure. A damper that adjusts the pressure difference between indoors and outdoors is used. In an emergency such as a fire, people often get caught in smoke and cause unfortunate results. For this emergency, a room called an annex is provided to constantly supply and exhaust air. On the other hand, a differential pressure adjustment damper is provided to maintain a required positive pressure outside the room.

FIGS. 15 and 16 show the actual construction of Sho 59-1638.
The damper for differential pressure adjustment disclosed in No. 51 is shown, and a structure is shown in which the blade is fixed to a rotating shaft provided in the case and the inside of the case is opened and closed by the rotation of the blade. Then, a balance weight is fixed to this rotary shaft to adjust the differential pressure by fixing the weight corresponding to the moment obtained by adding the rotation moment due to the blade weight and the starting rotation moment at the set pressure. is there.

[0004]

[Problems to be Solved by the Invention] By the way, for example,
When there is a sudden increase in pressure in the antechamber during an emergency, rather than adjusting the relative pressure difference between the adjacent indoor and outdoor pressures by adjusting the blade weight and balance weight, it is possible to deal with such a sudden pressure fluctuation. When the opening of the blade is exceeded, the blade is quickly fully opened to reduce the pressure loss, so that the differential pressure can be adjusted smoothly. And in order to solve such a problem, the conventional differential pressure adjustment damper
It was difficult to deal with, and the emergence of such dampers was longed for.

The present invention has been made in view of the above-mentioned conventional problems, and an object thereof is to maintain a low manufacturing cost with a simple structure while the blades are opened beyond a certain opening. The object of the present invention is to provide a damper device in which the responsiveness of the blade is highly improved by rapidly opening and closing the opening and closing blade.

[0006]

In order to achieve the above-mentioned object, the present invention rotatably opens and closes a ventilation port 14 in the ventilation port 14 for opening and closing the ventilation port 14 through which the air flows.
And a guide rod 28 fixed to the opening / closing blade 16 at a required mounting angle. The guide rod 28 crosses the horizontal line 200 from one side of the horizontal line 200 as the opening / closing blade 16 is opened / closed. Is provided so as to rotate in an arc shape while moving to the other side, and this guide rod 28 is freely slidable along the guide rod 28 in accordance with the arc rotation. The damper device 10 is provided with a weight 30.

Further, the opening / closing blade 16 is pivoted slightly below the upper edge of the ventilation opening 14, and the guide rod 28 moves from the horizontal line 200 when the opening / closing blade 16 fully closes the ventilation opening 14. The mounting angle may be set within the range of 90 degrees to 180 degrees, and the opening / closing blade 16 may be provided so as to rotate counterclockwise when opening.

Further, the opening / closing blade 16 is pivoted slightly below the upper edge of the ventilation opening 14, and the guide rod 28 extends from the horizontal line 200 when the opening / closing blade 16 fully closes the ventilation opening 14. The mounting angle may be set within a range of 270 degrees to 360 degrees, and may be provided so as to rotate counterclockwise when the opening / closing blade 16 is opened.

Further, the opening / closing blade 40 is connected to the ventilation port 14
Alternatively, it is attached to the rotary shaft 42 provided in the vicinity thereof,
The guide rod 28 may be connected to and attached to the rotary shaft 42.

The guide rod 28 has a mounting angle set within the range of 270 to 180 degrees from the horizontal line 200 when the opening / closing blade 40 fully closes the ventilation opening 14, and the opening / closing blade 40 is opened. It may be provided so as to rotate clockwise when operating.

Further, the guide rod 28 has a mounting angle set within the range of 270 to 360 degrees from the horizontal line 200 when the opening / closing blade 40 fully closes the ventilation opening 14, and the opening / closing blade 40 is opened. It may be provided so as to rotate counterclockwise when operating.

Further, the ventilation port 14 is formed by a case body 12 provided so as to surround the ventilation port 14, and the ventilation port 14 is provided in the case body 12 in the vicinity of the damper device 10. An opening / closing shutter 34 that opens and closes may be provided.

[0013]

The guide rod is provided so as to rotate in an arc shape while moving from one side of the horizontal line to the other side over the horizontal line as the opening and closing blades are opened and closed. A free slide weight is provided so that it can freely slide along the guide rod as the arc rotates. Therefore, when this guide rod is set between 90 degrees and 180 degrees with respect to the horizontal line, the guide rod rotates in an arc shape in accordance with the opening operation of the opening and closing blades, and the horizontal direction After crossing the line 200 and transitioning from the second to the third quadrant, so to speak, the free slide weight is free to slide longitudinally along its guide rod. Then, the free slide weight moves from the base of the guide rod to its tip side or from the tip to the base side at a stroke to increase the blade opening moment or reduce the blade closing moment to set and open the blade. It immediately displaces it to the fully open position.

[0014]

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. 1 to 10 show a first embodiment of a damper device according to the present invention, and FIG. 1 shows an example configured as a damper device which also serves as a fire damper, for example.

In this embodiment, an air supply / exhaust duct (not shown), a fan, etc. are communicated with an annex provided in a required part of the building, and a folding type opening / closing door is normally provided in a concave wall provided in the wall. Is provided, and the damper device 10 of the present case is provided in a part thereof. As shown in FIGS. 3, 4 and 5, for example, a rectangular case body 12 having a height of about 2 m and a width of about 50 cm is attached to the fire door opening so as to function as a fire door for shutting off the inside and outside in an emergency. There is. In the figure, this case body 12 has six rectangular ventilation openings 1 in the vertical direction.
Opening / closing blades 16 are provided so as to open and close these ventilation openings 14 through which air flows.

2 and 4, bearings 20a and 20b are attached to both side walls 18a and 18b of each ventilation port 14, respectively. Then, the short shaft 24 is fixed via a mounting plate 22 provided on the wind flow upstream side surface of the opening / closing blade 16, and the respective end portions of the short shaft 22 are axially supported by the bearings 20a and 20b. Opening and closing blade 1
6 is rotatably attached to open and close the inside of the ventilation port 14. The short shaft 22 axially supported by the bearings 20a and 20b is arranged slightly below the upper edge of the ventilation port 14. Therefore, the opening / closing blade 16 includes the bearing 20a,
The lower end portion side is formed so as to open upward while drawing a circular arc around the axis with 20b as a pivot.

As shown in FIGS. 6 to 8, the opening / closing blade 2
A mounting bracket 26 is fixed to a position slightly lower than the upper edge on the upstream side of 4, that is, near the substantially longitudinal line of the short shaft 24. The mounting bracket 26 has a rod-shaped guide rod at a required mounting angle. 28 is attached. As described above, the guide rod 28 is directly attached to the opening / closing blades 16 so that a so-called balance weight structure can be formed inside the case body 12 and a damper installation place can be widely selected.

One characteristic of the present invention is that the guide rod 28 rotates in an arc shape while moving from one side of the horizontal line to the other side beyond the horizontal line as the opening / closing blades are opened and closed. And the guide rod 2
8 is provided with a free slide weight so that it can freely slide along the guide rod along with the circular arc rotation.

That is, in FIG. 6, when the opening / closing blade 16 fully closes the ventilation port 14, the guide rod 28 is opened by α degrees with respect to the horizontal line 200 with reference to the rotation axis of the guide rod 28. It is set to and fixed. In the present embodiment, the guide rod 28 is 9
It is fixedly arranged between 0 and 180 degrees. Therefore, when the opening / closing blade 16 is opened 90 degrees from this state and is displaced to the fully open position, that is, the horizontal position, the guide rod 28 rotates counterclockwise in an arc shape and crosses the horizontal line 20. , So to speak, moving from the second to the third quadrant. Further, at this time, as shown in FIGS.
The lower part of the pivot shaft 6 is opened counterclockwise, so that the guide rod 28 is also rotated counterclockwise.

What is important in the present invention is that the free slide weight 3 is freely slidable along the guide rod 28.
0 is provided, and a hollow cylindrical weight having a required weight is inserted into the guide rod 28 on the inner wall side thereof, for example, into a ball bearing which is freely rotatable. The free slide weight 30 freely slides in the longitudinal direction along the guide rod 28 as the guide rod 28 rotates in an arc.

In particular, in this embodiment, when the guide rod 28 moves over the horizontal line 200, the free slide weight 30 moves in a direction in which the blade opening moment is changed from a small one to a large one. , The blades 16 are opened at a stretch with inertial force. 32
Is a stopper for setting the stop position of the opening / closing blade.

In the present embodiment, when the inside of the ventilation port is in a no-air state, the blade closing moment M _A of the blade weight is the free slide weight (including the moment of the guide rod 28).
Is larger than the moment M _B of the blade opening direction, and therefore the opening / closing blade 16 always keeps the ventilation port 14 closed in a windless state.

It goes without saying that the damper device according to the present invention can be used as a differential pressure damper for general air conditioning, a backflow prevention damper, etc. with the above-mentioned configuration, but in this embodiment, as shown in FIGS. In addition, it is configured as a differential pressure damper that doubles as a fire damper in a pressurized smoke exhaust system.

In FIG. 4, a well-known opening / closing shutter 34 for opening / closing an opening surrounded by the case body 12 is provided in the case body 12, close to the fire damper 10 and at a position on the upstream side of the wind flow. Further, a temperature use 36 is arranged at a substantially central position on the upstream side of the flow of the case body. As a result, the differential pressure of the differential pressure damper 10 is adjusted and the ventilation port 14 is shut off as necessary.

Next, the operation of this embodiment will be described. As described above, when the inside of the ventilation port is in a no-air state, the ventilation port closing moment M _A of the blade weight is larger than the opening moment M _B of the free slide weight. Therefore, the opening / closing blade 16 closes the ventilation port 14. At this time, the guide rod 28 is set to an opening degree of about 155 degrees with respect to the horizontal line 200 with respect to the rotation axis of the guide rod 28, and so to speak, it is located in the second quadrant. And free slide weight 30
Is positioned on the base side of the guide rod 28 due to gravity.

Next, the pressure inside the room becomes high, and the wind begins to flow in the direction of the arrow to generate a wind pressure moment M _{W in the} direction of opening the blades. Then, as the blade 16 rotates counterclockwise, the guide rod 28 moves toward the horizontal line 200 side. Then, in FIG. 7, the guide rod 28 has a horizontal line 2
Free slide weight 3 until it becomes parallel with 00
0 holds the position on the base side thereof.

When the free slide weight 30 is displaced from the horizontal line to the side of the third quadrant, the free slide weight 30 slides the guide rod 28 from the base portion due to its gravity, and quickly slides to the tip end side of the guide rod 28. At this time, M _B at the time of being located on the base side of the guide rod 28 suddenly becomes a large moment force as much as the displacement length to the tip of the guide rod 28 to open the opening / closing blade 16.

Further, at this time, the moment of inertia of the weight is also added. As a result, the blade 16 is rotated counterclockwise with a large moment force in combination with the wind pressure M _W, and the responsiveness of the blade is enhanced. The blade 16 shown in FIG. 8 is displaced to the fully open state.

The set pressure can be adjusted and set by the free slide weight or the length of the guide rod 28, but when the indoor wind pressure falls below the set pressure, the blade 16 gradually rotates in the closing direction by its own weight moment M _A. . On the contrary, when the guide rod 28 moves clockwise and crosses the horizontal line, the free slide weight 30 immediately moves to the guide rod 28.
Move up and stop at its base. As a result, even if the set differential pressure is adjusted, if an abnormally high pressure occurs inside the room, if the blades exceed a certain opening,
The fully opened state is immediately reached and the differential pressure is adjusted quickly.

When a fire occurs, the thermal fuse 36, which has reached the melting temperature, is actuated to release the engagement state of the shutter 34 at the opening position of the ventilation port to close the opening / closing shutter 34.
It also functions as a smoke proof and fire proof damper.

In the above embodiment, the guide rod 28 is 90 ° from the horizontal line when the opening / closing blade 16 fully closes the ventilation port.
Although the mounting angle was set in the range of 180 degrees to 180 degrees, as shown in FIGS. 11 and 12, the guide rod 28 is 270 degrees from the horizontal line when the opening / closing blade 16 fully closes the ventilation port 14. Alternatively, the mounting angle may be set within the range of 360 to 360 degrees.

In this case, the guide rod 28 is, so to speak, the fourth rod.
It is in a quadrant, and will cross over from the lower side of the horizontal line 200 to the upper side. The free slide weight 30 is positioned at the tip end side of the guide rod 28 by its own weight when the blades are fully closed at the air vent, and immediately slides to the base side and stops when the horizontal line 200 is crossed.

As a result, the moment force in the blade closing direction corresponding to the displacement length of the guide rod 28 is suddenly reduced, whereby the opening / closing blade 16 is quickly displaced to the fully open position. As the wind pressure decreases, the guide rod 28 rotates clockwise when it rotates in the closing direction due to the weight of the blades, and when it moves downward beyond the horizontal line 200, the free slide weight 30 moves to the tip side again. Of.

Next, a second embodiment of the damper device according to the present invention will be described with reference to FIGS.
The same members as those in the embodiment are designated by the same reference numerals and the description thereof will be omitted. In this embodiment, the damper device 10 is configured as a differential pressure damper for general air conditioning, for example.

Inside the rectangular case body 38 forming the ventilation opening 14, an opening / closing blade 40 for opening / closing the ventilation opening 14 in a double-door shape is provided so as to be openable and closable.

That is, rotary shafts 42b and 42a are rotatably attached to the upper and lower ends of the side wall of the case body 38 so as to pass through the ventilation holes 14, and one end of the lower rotary shaft 42a is attached. It projects from the case body to the outside. A guide rod 28 is attached and fixed to the projecting portion 44, and a free slide weight 30 is attached to the guide rod 28 as in the first embodiment.
Mounted so as to be freely slidable along the longitudinal direction thereof.

As shown in FIG. 13, in this embodiment, the guide rod 28 is opened when the opening / closing blade 40 fully closes the ventilation opening 14.
Has a mounting angle within the range of 270 to 180 degrees with respect to the horizontal line 200 with reference to the rotation axis of the guide rod 28. Further, it is provided so as to rotate clockwise when the opening / closing blade 40 is opened.

At this time, when there is no air inside the ventilation port, the ventilation port closing moment M _B of the free slide weight 30 is set to be larger than the ventilation port opening moment M _A of the blade weight. The ventilation port 14 is closed. Therefore, when the opening / closing blade 40 is displaced from this state to the open position shown by the chain line, the guide rod 28 rotates in a circular arc in the clockwise direction with the rotation of the rotating shaft 42, and exceeds the horizontal line 200. So to speak, move from the 3rd to the 2nd quadrant.

Next, the operation of this embodiment will be described.
The guide rod 28 is in the so-called third quadrant position when the blades 40 are in the closed state, and the free slide weight 30 is located on the endmost side thereof due to gravity.

Next, when there is wind pressure in the direction of the arrow, the opening / closing blades 40 are pushed open, and the blades further rotate in the opening direction beyond the position where the guide rod 28 becomes parallel to the horizontal line 200.
The guide rod 28 is also moved in an arc in synchronization with the guide rod 28, so that the free slide weight 30 immediately moves to the guide rod 28.
Slide to the base side of. As a result, the moment force in the blade closing direction corresponding to the displacement length of the guide rod 28 is suddenly reduced, so that the opening / closing blade 40 is quickly displaced to the fully open position.

As the wind pressure decreases, when the blade opening moment of the free slide weight 30 rotates in the blade closing direction, the guide rod 28 rotates counterclockwise and moves downward beyond the horizontal line 200. The free slide weight 30 again moves to the tip side thereof to maintain the blade closed state.

In the present embodiment, the case where the guide rod 28 is connected and fixed to the rotary shaft 42 of the blade is shown, but in addition to the second embodiment described above, the guide rod 28 has the opening / closing blade 40 and the ventilation port 14. Horizontal line 200 to 2 when fully closed
The mounting angle may be set within the range of 70 degrees to 360 degrees, and may be provided counterclockwise when the opening / closing blade 40 is opened.

In addition to this, when fixing to the rotary shaft,
Since the attachment of the blade in the closed state can be easily set to an arbitrary angle, the attachment angle of the guide rod 28 in the closed state of the blade may be set in the so-called first and second quadrants.

Further, the mounting angle of the guide rod corresponding to the blade opening direction is set according to the wind flow direction, and the guide rod and the like are attached to the right position symmetrical with respect to the wind pressure from the right direction in the figure. Becomes In addition, a guide rod may be attached to the lower side or the upper side of the case body 12 to reduce the space for installing the damper device,
Can be set arbitrarily according to the mounting angle. The present invention is not limited to the above-mentioned embodiments, and any modification may be made without departing from the essence of the invention described in the claims.

[0045]

As described above, according to the damper device of the first aspect, the opening / closing blade rotatably provided in the ventilation opening for opening / closing the ventilation opening through which the air flows and the opening / closing blade. With a guide rod fixed at the required mounting angle,
This guide rod is provided so as to rotate in an arc shape while moving from one side of the horizontal line to the other side across the horizontal line as the opening and closing blades are opened and closed. Is provided with a free slide weight so that it can freely slide along the guide rod in accordance with the circular arc rotation, so that the manufacturing cost can be kept low with an extremely simple structure and at the time of an emergency. When the room pressure suddenly becomes high and the blades open beyond the set opening, the blades can be quickly fully opened to reduce pressure loss and the differential pressure adjustment can be performed quickly and smoothly. is there.

According to a second aspect of the present invention, the opening / closing blade is pivoted slightly below the upper edge of the ventilation opening, and the guide rod is moved from the horizontal line when the opening / closing blade fully closes the ventilation opening. The installation angle is set within the range of 90 degrees to 180 degrees, and it is provided so as to rotate counterclockwise when the opening / closing blade is opened, so that the differential pressure can be quickly adjusted by the free slide weight. , The operation can be performed quickly with an increase in the moment in the direction that promotes blade opening.

According to a third aspect of the present invention, the opening / closing blade is pivotally supported at a position slightly lower than the upper edge of the ventilation opening, and the guide rod has a horizontal line when the opening / closing blade fully closes the ventilation opening. From 270 degrees to 360 degrees, and the opening / closing blade is provided so as to rotate counterclockwise when the opening operation is performed. The directional moment can be rapidly reduced to quickly obtain the blade fully open state.

According to a fourth aspect of the present invention, the opening / closing blade is attached to a rotary shaft provided at or near the ventilation port, and the guide rod is attached so as to be connected to the rotary shaft. The angle of the guide rod can be attached and set to an arbitrary angle very easily at any opening.

According to a fifth aspect of the present invention, the guide rod has a mounting angle set within a range of 270 to 180 degrees from the horizontal line when the opening / closing blade is in a state where the opening / closing blade is fully closed, and the opening / closing blade is Is provided so as to rotate in the clockwise direction when the blade is opened, it is possible to effectively show the rapid opening movement of the blade beyond the set angle.

According to a sixth aspect of the present invention, the guide rod has a mounting angle set within a range of 270 to 360 degrees from the horizontal line when the opening / closing blades are in a state of fully closing the ventilation opening, and the opening / closing blades are The blade is provided so as to rotate counterclockwise when it is opened, so that the blade can be quickly opened.

Further, according to claim 7, the ventilation port is formed by a case body provided so as to surround the ventilation port. Further, in the case body, the ventilation port is provided in the vicinity of the damper device. By providing an opening / closing shutter for opening / closing, it is possible to integrally construct a differential pressure damper that also serves as a fire damper.

[Brief description of drawings]

FIG. 1 is an installation conceptual diagram showing an installation place of a damper device according to a first embodiment of the present invention.

FIG. 2 is a partially enlarged back view of the opening / closing blades of the damper device according to the first embodiment as viewed from the front side inside.

FIG. 3 is a schematic overall front view of the damper device according to the first embodiment.

FIG. 4 is a schematic vertical explanatory view of FIG.

5 is a cross-sectional view taken along the line AA of FIG.

FIG. 6 is an enlarged cross-sectional explanatory view of a schematic main part of the damper device.

FIG. 7 is an enlarged cross-sectional explanatory view of a schematic main part of the damper device.

FIG. 8 is an enlarged cross-sectional explanatory view of a schematic main part of the damper device.

FIG. 9 is an enlarged side view of the damper device.

FIG. 10 is an enlarged side view operation explanatory diagram of the damper device.

FIG. 11 is a schematic side view illustrating a damper device according to a modification of the first embodiment.

FIG. 12 is an explanatory diagram of its operation.

FIG. 13 is a schematic side view illustrating a damper device according to a second embodiment of the present invention.

FIG. 14 is a schematic front explanatory view of a damper device according to a second embodiment of the present invention.

FIG. 15 is a schematic front view of a conventional differential pressure damper.

FIG. 16 is a schematic cross-sectional explanatory view of a conventional differential pressure damper.

[Explanation of symbols]

 10 Damper Device 12 Case Body 14 Ventilation Port 16 Opening / Closing Blade 28 Guide Rod 30 Free Slide Weight 34 Opening / Closing Shutter 42 Rotating Shaft 200 Horizontal Line

Claims (7)

[Claims] 1. An opening / closing blade rotatably provided in the ventilation opening for opening / closing a ventilation opening through which air flows, and a guide rod fixed to the opening / closing blade at a required mounting angle. The rod is provided so as to move in an arc shape while moving from one side of the horizontal line to the other side over the horizontal line when the opening and closing blades are opened and closed. A damper device in which a free slide weight is provided so that it can freely slide along the guide rod as it moves. 2. The opening / closing blade is pivotally supported slightly below the upper edge of the ventilation opening, and the guide rod is 90 degrees to 180 degrees from a horizontal line when the opening / closing blade fully closes the ventilation opening.
The damper device according to claim 1, wherein the mounting angle is set within a range of degrees, and the damper device is provided so as to rotate counterclockwise when the opening / closing blade opens. 3. The opening / closing blade is pivotally supported at a position slightly lower than the upper edge of the ventilation opening, and the guide rod is 270 ° to 36 ° from a horizontal line when the opening / closing blade fully closes the ventilation opening.
2. The damper device according to claim 1, wherein a mounting angle is set within a range of 0 degree and the damper device is provided so as to rotate counterclockwise when the opening / closing blade opens. 4. The damper device according to claim 1, wherein the opening / closing blade is attached to a rotating shaft provided at or near the ventilation port, and the guide rod is attached to be connected to the rotating shaft. 5. The guide rod has a mounting angle set within a range of 270 ° to 180 ° from a horizontal line when the opening / closing blades are in a state where the ventilation openings are fully closed, and the opening / closing blades are opened when the watch is opened. The damper device according to claim 4, wherein the damper device is provided so as to rotate around the direction. 6. The guide rod has a mounting angle set within a range of 270 ° to 360 ° from a horizontal line when the opening / closing blades are in a state of fully closing the ventilation port, and is not moved when the opening / closing blades are opened. The damper device according to claim 5, wherein the damper device is provided so as to rotate in a clockwise direction. 7. The ventilation port is formed by a case body provided so as to surround the ventilation port, and an opening / closing shutter for opening and closing the ventilation port is provided in the case body in the vicinity of the damper device. Claims 1 to 6
The damper device according to any one of 1.