JP2004144389A - Damper device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a damper device capable of simplifying an assembling structure, improving the efficiency of the work by simplifying the assembly, reducing the cost, and securing the air-tightness to the external. <P>SOLUTION: A bearing body 5 directly supporting a rotating shaft 3 is formed by combining an approximately cylindrical part and an approximately flange part, the bearing body 5 is mounted on an open frame body 2 in a state that the approximately flange part is opposite to an inner face of the open frame body 2, and a bearing locking tool 6 is screwed on the bearing body 5 from an outer side of the open frame body 2 to integrate the bearing body 5 and the open frame body 2 in an air-tight state, whereby the outflow of a gas from the inside of the opening frame body 2 to the outside is inhibited. A structure for journaling the rotating shaft 3 on the open frame body 2 is simplified, which dispenses with the work such as welding and the like, further the components can be easily assembled without needing a special technician for welding and the like, the manufacturing cost can be remarkably reduced, and the reliability on an air-tight state can be secured by eliminating a welded joint parts from a part which needs the air-tightness. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a damper device that is disposed in a duct path to perform intermittent flow control and air flow adjustment, and particularly to a damper device that places importance on airtightness that is disposed in a duct path through which a harmful gas leaks to the outside and passes through. About.
[0002]
[Prior art]
In ducts such as an intake system that sends conditioned air into a room that is an air-conditioning target room, and an exhaust system that exhausts air from the room for indoor ventilation or smoke emission, the flow path is interrupted or intermittent in the middle of the path. In many cases, a damper device is arranged for adjustment or the like. An example of such a conventional damper device is shown in FIGS. FIG. 4 is a plan view and a front view of the conventional damper device, FIG. 5 is a sectional view of each bearing portion in the conventional damper device, and FIG. 6 is an exploded perspective view of a main part of the conventional damper device.
[0003]
In each of the drawings, a conventional damper device 100 is provided with a substantially cylindrical opening frame 101 that is disposed in the middle of a duct path and allows gas to pass therethrough, and rotatably supports the opening frame 101 through the opening frame 101. A rotating shaft 102, a blade 103 for adjusting the air volume which is integrally fixed to the rotating shaft 102 and is disposed in the inner opening area of the opening frame 101, and an end of the rotating shaft 102 outside the opening frame 101. And a drive mechanism 104 that is connected to the unit and rotates the rotary shaft 102 together with the blade 103.
[0004]
The opening frame body 101 is a metal-made substantially cylindrical body having a flange portion integrally formed at both ends, and has holes penetrating the rotation shaft 102 at two opposing positions on the inner peripheral surface. And a bearing metal 101a slidably in contact with the rotating shaft 102.
[0005]
In this conventional damper device, the blade 103 is rotated by a predetermined angle with respect to the opening frame 101 from the outside of the opening frame 101 via a driving mechanism 104, and the direction of the airflow in the opening frame 101, By adjusting the opening area in the direction, the amount of gas passing, that is, the amount of gas flowing downstream is adjusted.
[0006]
When the conventional damper device 100 having the above configuration is used for the purpose of circulating a harmful gas leaking to the outside through the duct path including the damper device 100, airtightness is ensured and harmful gas from the inside to the outside of the opening frame body 101 is secured. On the drive side where the rotating shaft 102 is connected to the drive mechanism 104, an O-ring 105 is mounted at a predetermined position on the rotating shaft to prevent gas leakage, thereby preventing internal gas from leaking from a gap around the rotating shaft 102. Had a mechanism. On the outer side of the O-ring 105, an O-ring base 106 that supports the O-ring 105 from the outer peripheral side and adheres closely to the rotating shaft 102 is provided, and the O-ring base 106 is welded to the opening frame 101 in a substantially box. It is configured to be attached to and fixed to an O-ring base receiver 107 having a shape like a letter. The O-ring support 107 also serves as a mounting base for the drive mechanism 104.
On the other hand, at the end on the non-drive side of the rotating shaft 102, a shaft cap 108 is welded to the outside of the rotating shaft penetrating portion of the opening frame body 101 to prevent leakage of internal gas.
[0007]
[Problems to be solved by the invention]
The conventional damper device is configured as described above, and has an airtight holding structure portion in the opening frame body 101, that is, the O-ring base 106 and the O-ring base support 107, the O-ring base support 107 and the opening frame body 101, and the shaft. Since the cap 108 and the opening frame 101 are integrated by welding, it is difficult to reliably attain the state of satisfying the external airtightness at the welded joint portion 109, and a skilled welding technician is required. There is a problem that the cost is high and there is a risk that airtightness cannot be secured depending on the welding accuracy. In addition, there is a problem in that the components to be assembled by welding may be distorted due to heat of welding or the like, and the rotating operation of the blade 103 may become heavy.
[0008]
SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and provides a damper device which simplifies an assembling structure, enables easy assembling, improves work efficiency and costs, and ensures airtightness to the outside. The purpose is to do.
[0009]
[Means for Solving the Problems]
A damper device according to the present invention is provided with a substantially cylindrical opening frame that is provided in a predetermined intake or exhaust duct path and allows gas to flow, and a shaft that is rotatable while penetrating the opening frame. A rotating shaft that is supported, substantially plate-like blades that are integrally fixed to the rotating shaft and that are rotatably disposed in an inner opening region of the opening frame; A driving mechanism coupled to one end of the rotating shaft to drive the rotating shaft to rotate, and the damper device capable of rotating the wing by a predetermined angle to adjust the opening area in the opening frame body; A substantially cylindrical portion that allows the rotation shaft to be inserted inside and a substantially flange-shaped portion integrally formed around one end of the substantially cylindrical portion; a male screw portion is formed on the outer periphery of the substantially cylindrical portion; With the part positioned closer to the blade, insert the rotating shaft A bearing member disposed through the opening frame body, and a sealing member made of an elastic material disposed annularly between a substantially flange portion of the bearing body and the inner peripheral surface of the opening frame, A bearing stopper having a female screw portion engageable with a male screw portion of the bearing body, and airtight maintenance for preventing gas leakage from the inside to the outside of the opening frame body between the bearing body and the rotating shaft Means, the bearing body and the bearing stopper are screwed together and tightened to integrate the bearing body and the opening frame body, and the sealing material is provided on the substantially flange-shaped portion of the bearing body and the inner peripheral surface of the opening frame body. They are closely adhered to each other without gaps.
[0010]
As described above, in the present invention, the bearing body that directly supports the rotating shaft has a combination shape of a substantially cylindrical portion and a substantially flange-shaped portion, and this bearing body is formed on the opening frame body with the substantially flange-shaped portion facing the inner surface of the opening frame body. The bearing is fastened to the bearing body from the outside of the opening frame body, and the bearing body and the opening frame body are integrated in an airtight state. The structure for supporting the shaft to the opening frame can be a simple structure that does not require welding or other work.Parts can be easily assembled, and special technicians such as welding are not required, and manufacturing costs are reduced. In addition to greatly reducing the airtightness, the reliability of the airtight state can be ensured by eliminating the welded joint portion from the area where the airtightness needs to be ensured.
[0011]
Further, in the damper device according to the present invention, as necessary, the bearing body into which the other end of the rotating shaft is inserted is formed in a shape in which the other end located outside the opening frame is closed. , And also serves as the airtightness maintaining means.
Thus, in the present invention, the other end of the bearing body located near the other end side of the rotating shaft is formed in a closed state, and the bearing body having no opening at the other end is formed as a sealing body as airtight maintenance means. Since gas can be prevented from flowing out of the opening frame from between the rotating shafts, airtightness can be reliably ensured with a simple structure in which the other end of the rotating shaft is simply covered with a bearing, and cost reduction can be achieved.
[0012]
In addition, the damper device according to the present invention may be provided, as necessary, between the outer peripheral surface of the bearing body on the side close to the drive mechanism and the outer peripheral surface of the rotating shaft located in the bearing body, as the airtight maintaining means. An annular seal body made of an elastic material is provided in close contact with both the peripheral surface and the outer peripheral surface of the rotating shaft.
As described above, in the present invention, the annular seal is disposed between the rotating shaft and the bearing as airtightness maintaining means, and the bearing is formed by the annular seal that is in close contact with both the inner peripheral surface of the bearing and the outer peripheral surface of the rotating shaft. Gas can be prevented from flowing out of the opening frame body from between the body and the rotating shaft, so that a simple sealing structure combining the annular seal body and the bearing body at the opening frame penetrating portion near the drive mechanism of the rotating shaft is provided. Airtightness can be reliably ensured, and costs can be reduced.
[0013]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, a damper device according to an embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a plan view and a front view of a damper device according to the present embodiment, FIG. 2 is a cross-sectional view of each bearing portion in the damper device according to the present embodiment, and FIG. It is a partial exploded perspective view.
[0014]
In each of the drawings, the damper device 1 according to the present embodiment includes a substantially cylindrical opening frame 2 disposed in the middle of a predetermined duct path through which harmful gas leaks to the outside, and this opening frame. A rotating shaft 3 that is longer than the outer diameter of the opening frame 2 that is rotatably supported while penetrating the opening 2, and that is integrally fixed to the rotating shaft 3 and is disposed in the inner opening area of the opening frame 2. And a bearing member 5 having a combined shape of a cylindrical portion and a flange-shaped portion and attached to the opening frame 2, and screwed into the bearing 5 to integrate the bearing 5 and the opening frame 2 integrally. And a drive mechanism 7 that is connected to one end of the rotating shaft 3 outside the opening frame 2 and drives the rotating shaft 3 to rotate.
[0015]
The opening frame 2 is a metal-made substantially cylindrical body having flange portions integrally formed at both ends, and convex portions 2a that protrude outwardly protrude at two predetermined opposing inner peripheral surfaces. A hole 2b through which the rotating shaft 3 penetrates is formed at the center position of the convex portion 2a, and a bearing body 5 slidably in contact with the rotating shaft 3 is inserted and arranged in the hole 2b. Configuration. On the outer surface of the opening frame 2, a bolt 2c for fixing a driving mechanism 7 for driving the rotating shaft 3 at a predetermined arrangement position is fixed in an upright state by welding.
The blade 4 is formed of a metal disc-shaped body, is integrally fixed to the rotation shaft 3 at a central portion, and is disposed at the center of the opening area of the opening frame 2 so as to be rotatable by a predetermined angle. It is.
[0016]
The bearing body 5 includes a cylindrical portion through which the rotating shaft 3 can be inserted, and a flange portion 5a integrally formed around one end of the cylindrical portion. A male screw portion 5b is formed on the outer periphery of the cylindrical portion. The flange-shaped portion 5a is disposed so as to penetrate the opening frame 2 in a state of being located near the blade 4, so that the rotating shaft 3 can be inserted inside. An annular sealing member 5c made of an elastic material is provided between the flange 5a of the bearing 5 and the inner peripheral surface of the opening frame 2 to maintain airtightness. The opening frame 2 is brought into close contact with each of the inner peripheral surfaces.
[0017]
Of the bearing members 5, the bearing member 5 into which the other end portion of the rotating shaft 3 is inserted is formed in a shape in which the other end portion located outside the opening frame 2 is closed, and the bearing member 5 rotates with the bearing member 5. It is configured to prevent gas from leaking from the inside to the outside of the opening frame 2 through the space between the shaft 3 and serves also as the airtight maintaining means.
[0018]
In addition, between the inner peripheral surface of the bearing body 5 on the side closer to the drive mechanism 7 and the outer peripheral surface of the rotating shaft 3 located in the bearing body 5, the inner peripheral surface of the bearing body 5 serves as the airtight maintaining means. An annular seal body 8 made of an elastic material is provided in close contact with both outer peripheral surfaces of the driving shaft 3. The annular seal body 8 is mounted in a groove 3 a formed at a position just inside the bearing body 5 on the outer periphery of the rotating shaft 3, and the annular seal body 8 is provided between the bearing body 5 and the rotating shaft 3. It is unlikely to be displaced in the axial direction, so that the annular seal body 8 is not misaligned when the rotating shaft 3 is inserted into the bearing body 5 during assembly, and the position adjustment of the annular seal body 8 is unnecessary, thus improving workability.
[0019]
The nut 6 has a general configuration having a female screw portion that can be screwed into the male screw portion 5b of the bearing body 5 on the inner peripheral side. A washer (not shown) is provided between the end surface of the nut 6 and the outer peripheral surface of the opening frame 2 as necessary. The nut 6 is screwed into the bearing 5 from the outside of the opening frame 2 and tightened with a predetermined tightening force to fix the bearing 5 and the opening frame 2 integrally.
The drive mechanism 7 is a known mechanism that is connected to and drives one end of the rotating shaft 3 such as a handle, an electric motor, a gear box, or the like that transmits an operating force from a hand. This is a mechanism for rotating by a predetermined angle.
[0020]
Next, an assembly process of the damper device based on the above configuration will be described. First, the cylindrical portion of the bearing 5 is inserted from the inside of the opening frame 2 into the hole 2 b while facing the outside of the opening frame 2. At this time, a sealing material 5c is interposed between the flange 5a at one end of the bearing 5 and the inner peripheral surface of the opening frame 2. After inserting the bearing 5, a nut 6 is screwed into the external thread 5 b at the other end of the bearing 5 from the outside of the opening frame 2 so that the bearing 5 does not fall off the opening frame 2.
[0021]
On the other hand, after the annular seal body 8 is mounted in the groove 3a of the rotating shaft 3 in advance, the rotating shaft 3 is inserted into the bearing body 5 from the side of the opening frame body 2 closer to the driving mechanism 7 to open the opening frame body 2. And finally inserted into each bearing body 5. In this state, the annular seal body 8 comes into close contact with the inner peripheral surface of the bearing body 5 to ensure airtightness between the bearing body 5 and the rotating shaft 3. At the other end of the rotating shaft 3 as well, a bearing 5 having no opening at the end can prevent gas from flowing out between the bearing 5 and the rotating shaft 3 to the outside of the opening frame 2 and has a simple structure. Airtightness can be ensured.
[0022]
Thereafter, the blades 4 and the rotating shaft 3 are integrally fixed, and the respective nuts 6 are tightened with a predetermined tightening force so that the two bearing bodies 5 are integrally fixed to the opening frame 2. By tightening the nut 6, the sealing material 5c surely adheres tightly to the flange portion 5a of the bearing body 5 and the inner peripheral surface of the opening frame 2 without any gap, thereby ensuring airtightness between the bearing 5 and the opening frame 2. . The rotating shaft 3 is supported so as to be able to smoothly rotate while sliding with respect to the bearing body 5 fixed to the opening frame 2. Finally, if the drive mechanism 7 is fixed to the outer surface of the opening frame 2 while being connected to the rotation shaft 3, the assembling work is completed.
[0023]
In the damper device 1 having the above-described structure, the air volume can be adjusted by rotating the blades 4 from the outside of the opening frame 2 via the rotating shaft 3 by the driving mechanism 7 and changing the rotation angle of the blades 4 as in the related art. This is done by adjusting the opening area in the inside. An airtight state is ensured by a seal member 5c between each bearing body 5 and the opening frame body 2 and an annular seal body 8 provided between the bearing body 5 and the rotating shaft 3 on the side closer to the drive mechanism 7. 2 There is no gas leakage from the inside to the outside or in the opposite direction, and even if a harmful gas leaks to the outside inside the opening frame 2, the leakage of the harmful gas from inside the opening frame 2 is suppressed. Safety can be ensured.
[0024]
As described above, in the damper device according to the present embodiment, the bearing 5 that directly supports the rotating shaft 3 is formed by combining the cylindrical portion and the flange portion 5 a, and the bearing 5 is attached to the opening frame 2 by the flange. The bearing 5a is attached in a direction facing the inner surface of the opening frame 2 and the bearing stopper 6 is screwed to the bearing 5 from the outside of the opening frame 2 to integrate the bearing 5 and the opening frame 2 in an airtight state. Since the outflow of gas from the inside of the opening frame body 2 to the outside is suppressed, the structure for pivotally supporting the rotating shaft 3 on the opening frame body 2 can be a simple structure that does not require work such as welding. Can be easily assembled, and special technicians such as welding are not required, so that the manufacturing cost can be greatly reduced and the reliability of the airtight state can be secured by eliminating the welded joints from the areas where airtightness is required. .
[0025]
In the damper device according to the above-described embodiment, the damper device is configured to be a damper device for adjusting the air volume. However, the damper device is not limited to this, and may be another damper device such as a fire damper or a smoke exhaust damper. .
Further, in the damper device according to the above-described embodiment, a general nut 6 is used as a bearing stopper. It is also possible to adopt a configuration using a substantially cap-shaped body having a female screw formed thereon. In the case of such a cap nut or a substantially cap-shaped body, the male screw portion 5b of the bearing body 5 can be prevented from being exposed to the outside. .
[0026]
【The invention's effect】
As described above, according to the present invention, the bearing body that directly supports the rotating shaft has a combination shape of a substantially cylindrical portion and a substantially flange-shaped portion, and the bearing body is formed on the opening frame body and the substantially flange-shaped portion is formed on the inner surface of the opening frame. By attaching the bearing stopper to the bearing body from the outside of the opening frame body and integrating the bearing body and the opening frame body in an airtight state from the outside of the opening frame body, suppressing outflow of gas from the opening frame body to the outside, The structure for supporting the rotating shaft on the opening frame can be a simple structure that does not require welding or other work. Parts can be easily assembled, and special technicians such as welding are not required, and manufacturing is completed. It is possible to greatly reduce the cost, and it is possible to eliminate the welded joint portion from the portion where the airtightness needs to be ensured, thereby achieving the effect of ensuring the reliability of the airtight state.
[0027]
Further, according to the present invention, the other end of the bearing body located near the other end of the rotating shaft is formed in a closed state, and the bearing body in which the opening does not appear at the other end is a bearing body as airtight maintenance means. Since gas can be prevented from flowing out of the opening frame from between the rotating shafts, airtightness can be reliably ensured with a simple structure in which the other end of the rotating shaft is simply covered with a bearing, thereby reducing costs. Having.
[0028]
Further, according to the present invention, an annular seal is provided between the rotating shaft and the bearing body as an airtight maintaining means, and the bearing is formed by the annular seal body closely contacting both the inner peripheral surface of the bearing and the outer peripheral surface of the rotating shaft. Gas can be prevented from flowing out of the opening frame body from between the body and the rotating shaft, so that a simple sealing structure combining the annular seal body and the bearing body at the opening frame penetrating portion near the drive mechanism of the rotating shaft is provided. This has the effect of ensuring airtightness and reducing costs.
[Brief description of the drawings]
FIG. 1 is a plan view and a front view of a damper device according to an embodiment of the present invention.
FIG. 2 is a sectional view of each bearing part in the damper device according to one embodiment of the present invention.
FIG. 3 is an exploded perspective view of a main part of the damper device according to the embodiment of the present invention.
FIG. 4 is a plan view and a front view of a conventional damper device.
FIG. 5 is a sectional view of each bearing part in a conventional damper device.
FIG. 6 is an exploded perspective view of a main part of a conventional damper device.
[Explanation of symbols]
1, 100 Damper device 2, 101 Opening frame 2a Convex portion 2b Hole 2c Bolt 3, 102 Rotating shaft 3a Groove 4, 103 Blade 5 Bearing 5a Flange 5b Male thread 5c Seal material 6 Nut 7, 104 Drive mechanism 8 Annular seal body 101a Bearing metal 105 O-ring 106 O-ring base 107 O-ring base support 108 Shaft cap 109 Weld joint

Claims (3)

A substantially cylindrical opening frame body that is provided in a predetermined intake or exhaust duct path and allows gas to flow, and a rotating shaft that is rotatably supported while penetrating the opening frame body, A substantially plate-shaped blade fixed integrally to the rotation shaft and rotatably disposed in the inner opening area of the opening frame, and connected to one end of the rotation shaft outside the opening frame; And a driving mechanism for rotating the rotating shaft to rotate the blades by a predetermined angle to adjust the opening area in the opening frame.
At least a substantially cylindrical portion that can be inserted through the rotation shaft inside and a substantially flange-shaped portion integrally formed around one end of the substantially cylindrical portion, and a male screw portion is formed on the outer periphery of the substantially cylindrical portion; A bearing body disposed through the opening frame body while the rotating shaft is inserted inside in a state where the flange portion is located near the blade,
An elastic sealing material disposed annularly between the substantially flange portion of the bearing body and the inner peripheral surface of the opening frame;
A bearing stopper having a female screw portion that can be screwed into a male screw portion of the bearing body,
Airtight maintaining means for preventing gas from leaking from the inside to the outside of the opening frame through the space between the bearing and the rotating shaft,
The bearing body and the bearing stopper are screwed together and tightened to integrate the bearing body and the opening frame body, and the sealing material is closely adhered to the substantially flange-shaped portion of the bearing body and the peripheral surface of the opening frame body without any gap. A damper device. The damper device according to claim 1,
A damper device, wherein the bearing body through which the other end of the rotating shaft is inserted is formed in a shape in which the other end located outside the opening frame is closed, and also serves as the airtightness maintaining means. . The damper device according to claim 1 or 2,
An elastic material that is in close contact with both the inner peripheral surface of the bearing and the outer peripheral surface of the rotating shaft as the airtightness maintaining means between the inner peripheral surface of the bearing on the side closer to the drive mechanism and the outer peripheral surface of the rotating shaft located in the inner bearing. A damper device comprising an annular seal member made of stainless steel.

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