JP2007298239A - Damper plate, damper structure, and air supply opening - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce noise generated when closing vanes to block a venting passage, and to improve air tightness in an abutting portion of the vanes composing a damper plate, in regard to a damper plate, a damper structure, and an air supply opening. <P>SOLUTION: A soft rim 15 comprised of a rubber elastic body is provided on an arced circumferential rim of the vane 14 composing the damper plate to softly bring the vane 14 in elastic contact with an abutting step part 10c. By this, contact noise in closing the vanes 14 to close the venting passage can be damped and reduced, and a living environment is improved. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a damper plate, a damper structure, and an air supply port that open and close a ventilation path that serves as an intake port for outside air into a room, for example.

  Due to hygiene measures against the emission of pollutants in the living room, it is required that outside air is constantly taken into the room in highly airtight insulated houses. For this reason, the intake port 1 as shown, for example in FIG. 10 is attached to the intake port of the outside air to a room (nonpatent literature 1).

  The air supply port 1 is attached to an insertion port 2a formed in a wall 2 that partitions the outside and the room, and includes a front side louver portion 3 and a rear side main body portion 4. Of these, the main body 4 is attached by placing a rectangular back plate 5 along the wall 2 and inserting a cylindrical insertion tube 6 into the insertion port 2a.

  An operating portion 7 is attached to the back plate 5 so as to pass along the vertical direction, and an operating arm 7 a protruding to the inside of the insertion tube 6 is connected to the rear side end portion of the operating portion 7. (See FIG. 12).

  On the other hand, a damper plate 8 as shown in FIG. The damper plate 8 is composed of two blade plates 9 made of a thin metal plate having a semicircular shape. As shown in FIG. 11, each vane plate 9 is pivotally supported by a pivotal support shaft 11 attached to an annular portion 10a of a metal bracket 10 so as to abut a straight portion 9a. Yes. Two urging springs 12 are wound around the rotating support shaft 11. These urging springs 12 have a basic function of urging the blades 9 in the closing direction, that is, urging the air passages 6a (FIG. 12) formed by the insertion cylinders 6 to be closed. And the bracket 10 is attached with stays 10b extending in a cantilever shape from the upper end and the lower end of the annular portion 10a to the rear, and these stays 10 are fixed to the plug-in cylinder 6, The damper plate 8 is fixed inside the insertion tube 6.

  There are two basic operation modes in the air supply port 1 having the above schematic configuration. One of them is an operation mode in which the air passages 6a of the plug-in cylinder 6 are forcibly blocked by the blades 9 to block the intake of outside air. In this case, by pushing the operating rod 7b protruding to the lower end of the operating portion 7 upward, as shown in FIG. 12, a rack 7c provided on the operating rod 7b and a pinion 7d provided on the proximal end of the operating arm 7a The linear motion of the operating rod 7b is converted into the rotational motion of the operating arm 7a. When the operating arm 7a is rotated in this way, as shown in FIGS. 12 and 13, the two distal ends of the operating arm 7a projecting backward in a bifurcated manner are positioned substantially side by side, and each vane plate 9 is disposed on the inner surface. It will be in the state which regulates rotation by pushing from. This rotation restriction forcibly blocks the intake of outside air.

In another operation mode, each blade plate 9 can be freely rotated without restricting the rotation by the operation arm 7a, and each blade can be changed according to changes in static pressure (indoor pressure reduction) or dynamic pressure (outside wind blowing). The plate 9 is opened to take in outside air. Also in this case, the operating arm 7a is rotated by pushing the operating rod 7b upward in the same manner as described above so that the two end portions of the operating arm 7a are positioned side by side. When the change in the static pressure or dynamic pressure in the increasing direction is larger than the urging force of the urging spring 12 due to the release of the rotation restriction, each vane plate 9 is opened and the outside air is supplied. When it is smaller than the urging force of the urging spring 12, each blade 9 is closed and the supply of outside air is stopped.
Old model: PDG-AW <Fine series> Resin square louver cover For wall mounting, [on Line], Unix Co., Ltd., Unix website, [Search April 27, 2006], Internet <URL: http: //www.unix-coltd.co.jp/unix/catalogView?katasiki_no=PDG-AW>

  By the way, there are two problems with the conventional air inlet 1 as described above. One of them is to eliminate the generation of abnormal noise. That is, the air supply opening 1 releases the restriction of the rotation of the operating arm 7a, so that the two blades 9 of the damper plate 8 are automatically connected to the air passage 6a in accordance with the change in static pressure or dynamic pressure as described above. Open and close. At this time, as shown in FIG. 14, each vane plate 9 contacts the contact flange 10 c formed inward in the annular portion 10 a of the bracket 10 to close the air passage 6 a. However, every time each blade 9 comes into contact with the contact flange 10c, an abnormal noise “pattern, pattern,...” Is generated, which may adversely affect the living environment.

  In addition, each vane plate 9 of the damper plate 8 is pivotally supported by a rotation support shaft 11 in a state where the straight portions 9a are abutted with each other. However, when each vane plate 9 is closed and the air passage 6a is closed, the outside air W generates wind noise through a slight gap between the butted portions of the straight portions 9a that allow the vane plates 9 to rotate. However, the wind noise may deteriorate the living environment.

  The present invention has been made against the background of the prior art as described above. An object of the present invention is to first reduce noise generated when a damper plate is closed to close an air passage. Secondly, it is to improve the airtightness in the abutting portion between the blade plates constituting the damper plate.

  In order to achieve the above object, the present invention is configured as follows.

  The present invention has a blade plate that is pivotally supported so as to be rotatable in the direction of the cylinder axis of the cylindrical air passage, and the blade plate is protruded in the cylinder axis direction of the air passage by rotation. A damper plate that closes the air passage by contacting with the contact step and opens the air passage when the blade plate is separated from the contact step portion by rotation, and the contact step portion of the blade plate. Provided is a damper plate characterized in that a soft protrusion made of a rubber-like elastic body is provided at a contact location.

  According to this damper plate, since the soft protrusion made of a rubber-like elastic body is provided at the contact portion between the damper plate and the contact step portion, the blade plate of the damper plate makes elastic contact with the contact step portion. Therefore, compared to the contact sound between the metal blade and the contact step as in the prior art, the contact sound can be silenced by dulling and the living environment can be improved.

  The present invention provides a damper plate having a thin-pointed cross section from the base end side on the blade plate side to the distal end side in contact with the contact step portion.

  According to this damper plate, since the soft projection has a thin-walled cross section from the base end side on the blade plate side to the tip side that contacts the contact step portion, among the soft projections at the time of contact with the contact step portion, The distal end portion of the thin-walled thin section with high flexibility makes soft and elastic contact in a small area while releasing the contact force by elastic deformation. Therefore, it is possible to further reduce the contact sound between the slats and the contact step, and it is possible to realize an improvement in the living environment by further reducing the noise.

  The present invention provides a damper plate having a buffer portion made of a rubber-like elastic body that is fixed to an in-plane position of the blade plate.

  According to this damper plate, the shock absorber made of rubber-like elastic body is provided at the in-plane position of the blade plate, so that transmission of contact sound in the surface direction of the blade blade is absorbed by the buffer portion made of rubber-like elastic body. Is possible. Accordingly, it is possible to realize further silence of the contact sound.

  The present invention provides a damper plate in which a through hole is provided in a blade plate, and a fixing portion having a shape connecting portion that fills the through hole in a soft protrusion is provided.

  According to this damper plate, the blade plate and the soft protrusion can be firmly integrated by the connection structure by the geometric connection portion of the fixing portion through the through hole of the blade plate. Therefore, for example, by insert molding, a soft protrusion made of a rubber-like elastic body can be integrally formed on a blade made of a hard resin or a metal material via a fixing portion. When the blade is made of a hard resin, the blade and the fixing portion can be firmly integrated by two-color molding.

  The present invention provides a damper plate which is a single molded body in which the soft protrusion and the buffer portion are made of a rubber-like elastic body.

  According to this damper plate, since the soft protrusion and the buffer portion are a single molded body made of a rubber-like elastic body, the blade plate and them can be firmly integrated. Therefore, for example, the soft protrusion and the buffer portion can be formed on the blade by a single molding process by insert molding or two-color molding, and the production cost can be reduced.

  The present invention includes two semicircular blades that are rotatably supported by abutting linear portions with each other, and at least one of the blades is a straight line between the two blades. Provided is a damper plate that is provided with a ventilation shielding part that covers a portion where the parts meet each other.

  According to this damper plate, the ventilation shielding portion covers the abutting portion between the straight portions of the blade plate, so that the air tightness there can be enhanced. Therefore, inflow of outside air accompanied by wind noise can be suppressed from a slight gap between the butted portions.

  The present invention includes a cylindrical air passage forming member and a damper plate having a blade plate pivotally supported so as to be rotatable in a direction intersecting the cylinder axis of the air passage forming member. Is provided with a contact step protruding in the direction of the cylinder axis. When the blade is in contact with the contact step by rotation, the air passage is blocked, and the blade is separated from the contact step. The damper structure is characterized in that the damper plate is any one of the damper plates of the present invention.

  According to this damper structure, the operation and effect of the above-described damper plate of the present invention can be exhibited. And this damper structure is realizable as a damper structure in the duct used as the ventilation path of a ventilation system, and a damper structure of an air supply opening.

  The present invention includes a cylindrical air passage forming member and a damper plate having a blade plate pivotally supported so as to be rotatable in a direction intersecting the cylinder axis of the air passage forming member. Is provided with a contact step protruding in the direction of the cylinder axis. When the blade is in contact with the contact step by rotation, the air passage is blocked, and the blade is separated from the contact step. The damper structure is characterized in that a soft protrusion made of a rubber-like elastic body is provided at a contact portion with the blade plate in the contact step portion of the air passage forming member.

  According to this damper structure, since the soft protrusion made of a rubber-like elastic body is provided at the contact portion with the blade plate in the contact step portion of the air passage forming member, the same operation and effect as the above-described damper plate of the present invention are obtained. Can demonstrate. And this damper structure is realizable as a damper structure in the duct used as the ventilation path of a ventilation system, and a damper structure of an air supply opening.

  The present invention comprises an insertion cylinder that is inserted into an insertion opening that opens in a wall, and a damper plate that has a blade plate that is pivotally supported in a direction intersecting the cylinder axis of the insertion cylinder. And the insertion tube is provided with an abutting step portion protruding in the cylinder axis direction, and the air passage in the insertion tube is closed by the blade plate coming into contact with the abutting step portion by rotation, An air supply port that opens the air passage when the blade plate is separated from the contact step portion by rotation, wherein the damper plate is any one of the damper plates of the present invention. provide.

  According to this air supply port, the function and effect of the above-described damper plate of the present invention can be exhibited.

  The present invention comprises an insertion cylinder that is inserted into an insertion opening that opens in a wall, and a damper plate that has a blade plate that is pivotally supported in a direction intersecting the cylinder axis of the insertion cylinder. And the insertion tube is provided with an abutting step portion protruding in the cylinder axis direction, and the air passage in the insertion tube is closed by the blade plate coming into contact with the abutting step portion by rotation, The air supply opening that opens the air passage when the blade plate is separated from the contact step portion by rotation is a soft material made of a rubber-like elastic body at the contact portion with the blade plate in the contact step portion of the plug-in cylinder. An air supply opening characterized by providing a projection is provided.

  According to this air supply port, since the soft protrusion made of the rubber-like elastic body is provided at the contact portion with the blade plate in the contact step portion of the insertion tube, the same operation and effect as the above-described damper plate of the present invention are obtained. It can be demonstrated.

  According to the damper plate, the damper structure, and the air supply port of the present invention, it is possible to reduce noise generated when the damper plate is closed and the air passage is closed. For this reason, even if the damper plate is repeatedly opened and closed, it is possible to quietly take in the outside air into the room and realize a favorable living environment.

  According to the damper plate, the damper structure, and the air supply port of the present invention, it is possible to improve the airtightness at the abutting portion between the blade plates constituting the damper plate. For this reason, especially when the damper plate is in a closed state in which the air passage is forcibly closed, it is possible to suppress the generation of wind noise due to the outside air flowing in from the butted portions of the blade plates, and a good living environment can be achieved. Can be realized.

  Hereinafter, an example of an embodiment of the present invention will be described with reference to the drawings. The first to fourth embodiments described below have the same configuration except for the damper plate 8 of the conventional air supply port 1. Moreover, 5th Embodiment is the same structure except the bracket 10 of the conventional air inlet 1. FIG. Accordingly, in each embodiment, the same components as those of the conventional technology are denoted by the same reference numerals, and redundant description is omitted.

First Embodiment [FIGS. 1 to 3]
The first embodiment is realized as a damper plate 13 in place of the above-described conventional damper plate 8 and an air supply port 1 in which the damper plate 13 is attached to the bracket 10 via the rotation support shaft 11. Further, it is realized as a damper structure by the air supply port 1 including the insertion tube 6 and the bracket 10 as the “ventilating passage forming member”, the contact flange 10 c as the “contact step portion”, and the damper plate 13.

  The damper plate 13 is composed of two blades 14 made of hard resin or a thin metal material. A soft edge 15 as a “soft protrusion” is provided on the arc-shaped periphery of each semicircular blade 14. The soft edge 15 is formed of a rubber-like elastic body such as a thermoplastic elastomer or a thermosetting elastomer such as natural rubber or synthetic rubber. Therefore, the blade plate 14 and the soft edge 15 are integrated by, for example, insert molding of the metal thin blade plate 14 and soft edge 15, insert molding of the hard resin blade plate 14 and soft edge 15, or two-color molding. be able to.

  The soft edge 15 is formed with a fixing portion 16 that is a fixing portion to the blade plate 14 and a contact portion 17 as a “soft protrusion” having a thin-pointed shape that protrudes obliquely outward from the fixing portion 16. ing. Among these, the fixed portion 16 is formed with a shape connecting portion 16a that is hardened and connected in shape through a through hole 14a (FIG. 2) formed through the blade plate 14. Therefore, even if the fixing portion 16 is peeled off from the blade plate 14, the fixing of the soft edge 15 to the blade plate 14 is maintained by the geometrical connecting portion 16a.

  The contact portion 17 is formed as a pointed shape that gradually tapers from the proximal end side supported by the fixing portion 16 to the distal end side. Accordingly, the distal end side is particularly flexible, while the proximal end side exhibits a supporting force for the soft distal end side. This is based on the following reasons.

  That is, as shown in FIG. 3, when the blade 14 rotates about the rotation support shaft 11 and contacts the contact flange 10 c as the “contact step” in the bracket 10, In particular, the thin tip portion of the contact portion 17 having high flexibility makes soft elastic contact with a small area while releasing contact force (impact at the time of contact) by elastic deformation having high flexibility. Thereby, the contact sound at the time of closing the blade 14 can be suppressed. At this time, the thick base end side acts to regulate elastic deformation in which the thin flexible distal end portion is bent more than necessary. That is, when the fixing portion 16 comes into surface contact with the contact flange 10c, the level at which the contact sound can be dulled is lowered. The thick base end side exerts a supporting force for the thin distal end portion of the abutting portion 17 so that the fixing portion 16 is not brought into surface contact with the abutting flange 10c, and thereby contact when the blade plate 14 is closed. The sound is silenced by the highly flexible elastic contact of the contact portion 17.

  As described above, in the damper plate 13 of the present embodiment, the damper structure including the damper plate 13 and the air inlet 1, it is possible to further reduce the contact sound between the blade plate 14 and the contact flange 10 c, thereby reducing the noise. Can improve the living environment.

Second Embodiment [FIG. 4]
In the second embodiment, the vane plate 19 of the damper plate 18 is different from the first embodiment. Each vane plate 19 is provided with a buffer portion 20 having the same shape at in-plane positions on both sides. The buffer portion 20 is a rubber-like elastic molded body that is integrated on both surfaces of the blade plate 19, and is formed by insert molding or two-color molding in accordance with the selected material as in the first embodiment. And in order to improve the adhesiveness with respect to the blade board 19, many through-holes 19a are formed in the surface position of the blade board 19, and it hardens | cures through this through-hole 19a, and it connects firmly in a shape. Therefore, even if the buffer portion 20 is peeled off from the plate surface of the blade plate 19, the fixing of the buffer portion 20 to the blade plate 19 is maintained by this geometric connection structure.

  The buffer portion 20 as described above further alleviates the contact sound that occurs when the blade plate 19 abuts against the abutting flange 10c and closes the air passage 6a. That is, when the blade plate 19 comes into contact with the contact flange 10 c, the contact sound (impact sound / vibration sound) transmitted through the plate surface of the blade plate 19 is absorbed by the buffer portion 20 that partitions the plate surface of the blade plate 19. . Therefore, in the damper plate 18 of the present embodiment, the damper structure including the damper plate 18 and the air supply port 1, it is possible to further reduce the contact sound between the blade plate 19 and the contact flange 10c, and further silence. Can improve the living environment.

  In addition, although the linear thing which the buffer part 20 partitions in matrix form was illustrated in this form, it can also implement as a form of a rectangular surface form, or a combination of a linear form and a rectangular surface form. Moreover, although the buffer part 20 illustrated the thing of the same shape about both surfaces of each blade | wing plate 19, it is good also as a different shape in each surface. Further, the buffer portion may be formed only on one surface of the blade plate 19.

Third Embodiment (FIG. 5)
The third embodiment is a modification of the second embodiment. That is, in the blade plate 22 of the damper plate 21 of the present embodiment, the second embodiment is that the buffer portion 23 made of a rubber-like elastic body is formed as an integral molded body continuous with the fixing portion 16 of the soft edge 15. And different.

  The buffer part 23 as described above extends to a position close to the soft edge 15 that is a source of contact sound, as compared with the buffer part 20 of the second embodiment. For this reason, the contact sound (impact sound / vibration sound) transmitted through the plate surface of the blade 22 can be absorbed at a position closer to the generation source of the contact sound. Therefore, it is possible to further reduce the contact sound generated when the blade plate 22 contacts the contact flange 10c and closes the air passage 6a.

  Moreover, since the buffer part 23 and the soft edge 15 are a single molded object, the blade board 22, the soft edge 15, and the buffer part 23 can be integrated firmly. Therefore, for example, the soft edge 15 and the buffer portion 23 can be formed on the blade 22 by a single molding process by insert molding or two-color molding, and there is an advantage that the production cost can be reduced.

Fourth Embodiment [FIGS. 6 to 8]
The fourth embodiment is a modification of the first embodiment. That is, the damper plate 24 of this embodiment is different from that of the first embodiment in that the ventilation shield 26 made of a rubber-like elastic body is formed on one blade plate 25 as an integral molded body continuous with the soft edge 15. Is different.

  The ventilation shielding part 26 is formed so as to protrude outward from the surface of the one blade plate 25 on the inflow side of the outside air to the straight portion 27 of the blade plate 25. That is, as shown in FIG. 7, the damper plate 24 of the present embodiment is pivotally supported by the rotating support shaft 11 in a state where the one blade plate 25 and the other blade plate 14 are in contact with the straight portions 27 of their outer edges. Is done. And the ventilation | gas_flowing shielding part 26 obstruct | occludes the butting location of the linear parts 27 over a longitudinal direction so that external air may not flow in from the slight clearance gap of the butting location. Thereby, the airtightness in the state where the air passage 6a is closed by the damper plate 24 is enhanced, and the inflow of outside air accompanied by wind noise can be suppressed. Therefore, according to the damper plate 24 of the present embodiment, the damper structure including the damper plate 24, and the air supply port 1, it is possible to realize a favorable living environment by further suppressing wind noise.

  Further, similarly to the fixing structure of the soft edge 15, the ventilation shielding part 26 of this embodiment is firmly fixed to the blade plate 25 by a geometrical connection structure through a through hole 25 a penetrating the blade plate 25. Therefore, even if the ventilation shielding part 26 is peeled off from the plate surface of the blade plate 25, the fixing can be maintained by this geometrical connection structure.

  Furthermore, since the ventilation shielding part 26 of this embodiment is a single molded body continuous with the soft edge 15, the blade plate 25, the soft edge 15, and the ventilation shielding part 26 can be firmly integrated. Therefore, for example, the soft edge 15 and the ventilation shielding part 26 can be formed on the vane plate 25 by a single molding process by insert molding or two-color molding, and there is an advantage that the production cost can be reduced.

  About the ventilation shielding part 26 of the above 4th Embodiment, it can also implement as a form of FIG. 8, for example. That is, although the example of FIG.6 and FIG.7 is the ventilation shielding part 26 which consists of rubber-like elastic bodies, it can also be implemented as the ventilation shielding part 28 which consists of a strip-shaped resin film, for example. In this case, the ventilation shielding portion 28 is fixed by first providing the ventilation shielding portion 28 with a through hole 28a that is aligned with the through hole 25a of the blade plate 25. And the holding | maintenance part 29 equivalent to the strip | belt-shaped part in the surface of the blade | wing plate 25 in the ventilation | gas_flowing shielding part 26 mentioned above is integrally molded with the soft edge 15. FIG. As a result, similarly to the geometrical connection structure of the ventilation shielding part 26, a geometrical connection structure is formed for the through holes 25 a and 28 a, and the ventilation shielding part 28 is firmly fixed to the blade plate 25 by the holding part 29. Can do.

Fifth embodiment (FIG. 8)
The fifth embodiment is different from the conventional air supply port 1 in the configuration of the bracket 30 that constitutes the “ventilating passage forming member” together with the insertion tube 6. About the remaining structure, it is the same as the conventional air inlet 1 provided with the bracket 10.

  An annular portion 30 a is formed on the bracket 30 in the same manner as the conventional bracket 10. Although not shown, a stay 10b for fixing the bracket 30 to the inner periphery of the insertion tube 6 is formed in the annular portion 30a.

  The bracket 30 is formed with a soft edge 31 as a “soft protrusion” on the contact flange 30 b as a “contact step” over the entire circumference. The structure of the soft edge 31 is substantially the same as the soft edge 15 of the first embodiment. Therefore, according to the damper structure including the bracket 30 and the air supply port 1 including the bracket 30 according to the present embodiment, the same functions and effects as those of the embodiments including the soft edge 15 can be exhibited.

The front view which looked at the damper board of 1st Embodiment from the inner side of the air supply opening. It is explanatory drawing of the slat which comprises the damper board of FIG. 1, a division figure (A) is a front view, and a division figure (B) is a right view. Operation | movement explanatory drawing which shows the operating state of the damper board of FIG. The front view of the blade board of the damper board of 2nd Embodiment. The front view of the blade board of the damper board of 3rd Embodiment. The front view of the blade board of the damper board of 4th Embodiment. The expanded sectional view which shows the attachment state to the air supply opening | mouth of the damper board of FIG. FIG. 8 is an enlarged cross-sectional view showing a modification of the vane plate of FIG. The principal part expanded sectional view which shows the damper structure and air supply opening of 5th Embodiment. The perspective view which shows the air inlet by a prior art example. The external appearance perspective view which shows the damper board of FIG. The center longitudinal cross-sectional view of the air supply opening shown in FIG. FIG. 11 is a partially cutaway front view of the air supply port shown in FIG. 10. Operation | movement explanatory drawing of the damper board of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Air supply port 2 Wall 2a Insertion port 3 Guarantee part 4 Main-body part 5 Back plate 6 Insertion cylinder (air-passage formation member)
6a Ventilation path 7 Actuation part 7a Actuation arm 7b Operation rod 7c Rack 7d Pinion 8 Damper plate 9 Blade plate 9a Straight line part 10 Bracket (ventilation path forming member)
10a Ring portion 10b Stay 10c Contact flange (contact step)
11 Rotating support shaft 12 Biasing spring 13 Damper plate (first embodiment)
14 Blade plate 14a Through hole 14b Through hole 15 Soft edge (soft protrusion)
16 Adhering part 16a Shaped connection part 17 Contact part (soft projection)
18 Damper plate (second embodiment)
19 Blade plate 19a Through hole 20 Buffer portion 21 Damper plate (third embodiment)
22 vane plate 23 buffer part 24 damper plate (fourth embodiment)
25 Vane plate 25a Through hole 26 Ventilation shielding portion 27 Straight portion 28 Ventilation shielding portion 29 Holding portion 30 Bracket (fifth embodiment)
30a Ring portion 30b Contact flange (contact step)
31 Soft edges (soft protrusions)

Claims (10)

A blade plate pivotally supported so as to be pivotable in a tube axis crossing direction of the cylindrical air passage, and the blade plate projecting in the tube shaft direction of the air flow passage by rotation; In the damper plate that closes the ventilation path by contacting, and opens the ventilation path by separating the blade plate from the corresponding stepped part by rotation,
A damper plate characterized in that a soft protrusion made of a rubber-like elastic body is provided at a contact portion of the blade plate with the contact step portion.   2. The damper plate according to claim 1, wherein the soft protrusion has a thin-walled cross section from the base end side on the blade plate side to the tip end side in contact with the contact step portion.   The damper plate according to claim 1 or 2, wherein the damper plate has a buffer portion made of a rubber-like elastic body fixed to an in-plane position of the blade plate.   The damper plate according to any one of claims 1 to 3, wherein the blade plate is provided with a through hole, and the soft protrusion is provided with a fixing portion having a shape connecting portion that fills the through hole.   The damper plate according to claim 3 or 4, wherein the soft protrusion and the buffer portion are a single molded body made of a rubber-like elastic body.   It has two semicircular blades supported so as to be able to rotate by abutting each other with straight portions, and at least one of the blades is abutted between the straight portions of the two blades The damper plate according to any one of claims 1 to 5, further comprising a ventilation shielding portion that covers the portion. And a damper plate having a blade plate pivotally supported so as to be pivotable in a direction crossing the cylinder axis of the air passage forming member. The abutting step portion is provided so as to close the air passage when the blade plate comes into contact with the abutting step portion by rotation, and the air passage is separated from the contact step portion. In the damper structure that opens,
The damper plate according to any one of claims 1 to 6, wherein the damper plate is a damper plate. And a damper plate having a blade plate pivotally supported so as to be pivotable in a direction crossing the cylinder axis of the air passage forming member. The abutting step portion is provided so as to close the air passage when the blade plate comes into contact with the abutting step portion by rotation, and the air passage is separated from the contact step portion. In the damper structure that opens,
A damper structure characterized in that a soft protrusion made of a rubber-like elastic body is provided at a contact portion with a blade at a contact step portion of an air passage forming member. And a damper plate having a blade plate pivotally supported so as to be rotatable in a direction intersecting the cylinder axis of the insertion tube. The insertion tube is provided with a contact step portion that protrudes in the cylinder axis direction. When the blade plate contacts the contact step portion by rotation, the air passage in the insertion tube is blocked, and the blade plate In the air supply opening that opens the air passage by being separated from the contact step portion by rotation,
An air supply port, wherein the damper plate is the damper plate according to any one of claims 1 to 6. And a damper plate having a blade plate pivotally supported so as to be rotatable in a direction intersecting the cylinder axis of the insertion tube. The insertion tube is provided with a contact step portion that protrudes in the cylinder axis direction. When the blade plate contacts the contact step portion by rotation, the air passage in the insertion tube is blocked, and the blade plate In the air supply opening that opens the air passage by being separated from the contact step portion by rotation,
An air supply opening characterized in that a soft projection made of a rubber-like elastic body is provided at a contact portion with a blade at a contact step portion of an insertion tube.

Images