JP2019020010A - Damper device - Google Patents

Abstract

To provide a damper device capable of smoothly opening and closing an opening part with a movable cover.SOLUTION: A damper device 1 controls supply of cool air by moving a movable cover 20 in an opening direction L1 and a direction L2 while guiding it with a guide mechanism 15. The guide mechanism 15 has a gap larger in dimension in a first direction Y than in a second direction X between an outer peripheral surface of a first guide shaft 121 and an inner peripheral surface of a first guide hole 231, and also has a gap larger in dimension in the second direction than in the first direction between an outer peripheral surface of a second guide shaft 122 and an inner peripheral surface of a second guide hole 232. Consequently, even if variance in clearance is generated during manufacture, no excessive load is placed. An opening part 61 can be therefore opened and closed smoothly with the movable cover 20.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a damper device attached to a fluid passage.

  It has been proposed to provide a damper device at an opening of a fluid passage through which a fluid such as a refrigerant or a refrigerant flows (see Patent Document 1). Further, as a damper device, it has been proposed to open and close the opening by linearly driving a movable cover that covers the opening in the opening direction and the closing direction (see Patent Document 2). In the damper device described in Patent Document 2, the drive unit is fixed to a position separated from the partition plate by a support body supported by the partition plate in which the opening is formed, and the rotation of the rotary body of the drive unit is sent to the feed screw mechanism. The movable cover is moved directly by being transmitted to the movable cover. At this time, a mode has been proposed in which the guide shaft formed on one of the movable cover and the support is passed through the guide formed on the other to guide the movable cover. Further, a configuration has been proposed in which the distal end side of the guide shaft is thinned and the movable cover is slid smoothly.

JP 11-118317 A Japanese Patent Laid-Open No. 2006-161232

  However, when the tip end side of the guide shaft is narrowed as in the damper device of Patent Document 2, when the base portion of the guide shaft is fitted in the guide hole, the movable cover cannot be smoothly slid. There is. Further, when the tip end side of the guide shaft is thinned, there is a problem that the movable cover is loose.

  In view of the above problems, an object of the present invention is to provide a damper device that can smoothly open and close an opening by a movable cover.

  In order to solve the above-described problems, the present invention linearly drives a movable cover arranged to cover an opening, a closing direction approaching the opening, and an opening direction separating from the opening. A drive unit; and a support body that supports the drive unit from the opening direction side. One member of the support body and the movable cover extends along a moving direction of the movable cover. A first guide shaft and a second guide shaft are provided, and the first guide hole into which the first guide shaft is fitted and the second guide shaft are fitted into the other member of the support and the movable cover. A gap between the outer peripheral surface of the first guide shaft and the inner peripheral surface of the first guide hole is a dimension in a first direction orthogonal to the moving direction of the movable cover. Is the movement of the movable cover The gap between the outer peripheral surface of the second guide shaft and the inner peripheral surface of the second guide hole is greater than the dimension in the second direction perpendicular to the direction and intersecting the first direction. The dimension in the second direction is larger than the dimension in the first direction.

In the present invention, among the guide shaft and the guide hole for guiding the movable cover, the gap between the outer peripheral surface of the first guide shaft and the inner peripheral surface of the first guide hole has a dimension in the first direction and a dimension in the second direction. In contrast, the clearance between the outer peripheral surface of the second guide shaft and the inner peripheral surface of the second guide hole is larger in the second direction than in the first direction. For this reason, even if a variation in clearance occurs during manufacturing, an excessive load does not occur. Therefore, the opening portion can be smoothly opened and closed by the movable cover.

  In the present invention, it is possible to adopt a mode in which the one member is the support and the other member is the movable cover. According to this aspect, since the movable cover can be reduced in weight, the movable cover can be driven smoothly.

  In the present invention, the moving direction of the movable cover and the second direction may be a horizontal direction, and the first direction may be a vertical direction.

  In the present invention, the one member is provided with a third guide shaft extending along the moving direction of the movable cover, and the other member is provided with a third guide hole into which the third guide shaft is fitted. The gap between the outer peripheral surface of the third guide shaft and the inner peripheral surface of the third guide hole can adopt a mode in which the dimension in the second direction is larger than the dimension in the first direction. . According to this aspect, even when the guide shaft and the guide hole are increased, an excessive load is not generated, so that the opening portion can be smoothly opened and closed by the movable cover.

  In the present invention, the first guide shaft is offset with respect to the first direction with respect to the second guide shaft and the third guide shaft, and the second guide shaft and the third guide shaft in the second direction. A mode positioned between the guide shaft and the guide shaft can be employed. According to this aspect, since the movable cover can be guided by the three sets of guide shafts and guide holes, the movable cover can be guided in a stable state.

  In the present invention, the support and the movable cover may employ a mode in which the movable cover abuts when the movable cover moves most in the opening direction.

  In the present invention, one of the support body and the movable cover is formed with a protrusion protruding toward the other, and the support body and the movable cover are formed when the movable cover moves most in the opening direction. It is possible to adopt a mode in which the contact is made through the protrusion. According to this aspect, the support body and the movable cover abut on each other reliably. In this case, a mode in which a plurality of the protrusions are formed can be employed. In the present invention, a mode in which the protrusions are formed at three positions can be adopted. According to this aspect, the support body and the movable cover abut on each other reliably. In the present invention, when viewed from the center of the movable cover, each of the three locations is a location adjacent to the first guide shaft on the radially outer side, a location adjacent to the second guide shaft on the radially outer side, and the first It is possible to adopt a mode in which the three guide shafts are adjacent to each other on the radially outer side.

  In the present invention, the drive unit includes a drive source and an engaging portion formed of a spiral convex portion or a concave portion on the outer peripheral surface, and is driven by the drive source to extend in the moving direction to the movable cover. A rotating body rotating around the axis of the rotating body, and the movable cover includes a rotating body arranging hole in which a portion of the rotating body where the engaging portion is formed is arranged inside, and the rotating body arranging hole. It is possible to adopt a mode in which the engaging portion and the engaged portion constituting the feed screw mechanism are engaged with the engaging portion on the inner peripheral surface thereof.

In the present invention, a fan is supported on the support body on the side in the closing direction with respect to the movable cover, and the movable cover includes an end plate portion facing the fan in the opening direction, and a periphery of the fan. And a cylindrical body protruding in the closing direction from the end plate so as to surround the end plate, and a mode in which the rotating body arrangement hole is formed in the end plate can be adopted. In this case, an embodiment in which the fan is a centrifugal fan can be adopted. In this invention, the aspect provided with the some connection shaft which connects the said support body and the said fan is employable. In the present invention, the one member is the support body, the other member is the movable cover, and the support body and the fan are connected by the first guide shaft and the second guide shaft. It may be adopted.

  In the present invention, a mode in which cold air is supplied through the opening can be employed.

  In the present invention, among the guide shaft and the guide hole for guiding the movable cover, the gap between the outer peripheral surface of the first guide shaft and the inner peripheral surface of the first guide hole has a dimension in the first direction and a dimension in the second direction. In contrast, the clearance between the outer peripheral surface of the second guide shaft and the inner peripheral surface of the second guide hole is larger in the second direction than in the first direction. For this reason, even if a variation in clearance occurs during manufacturing, an excessive load does not occur. Therefore, the opening portion can be smoothly opened and closed by the movable cover.

It is a perspective view of a damper device to which the present invention is applied. FIG. 2 is a cross-sectional view of the damper device shown in FIG. 1 with a movable cover in a closed position. It is a disassembled perspective view of the state which removed the support body in the damper apparatus shown in FIG. It is a disassembled perspective view of the state which removed the support body and the movable cover in the damper apparatus shown in FIG. It is a disassembled perspective view of the state which removed the support body, the movable cover, the drive unit, and the fan in the damper apparatus shown in FIG. It is the perspective view which looked at the movable cover used for the damper apparatus shown in FIG. 1 from the opening direction. It is the perspective view which looked at the movable cover used for the damper apparatus shown in FIG. 1 from the close direction. It is the disassembled perspective view which looked at the drive unit used for the damper apparatus shown in FIG. 1 from the opening direction. It is the disassembled perspective view which looked at the drive unit used for the damper apparatus shown in FIG. 1 from the close direction. It is a disassembled perspective view of the geared motor used for the drive unit shown in a figure. It is explanatory drawing of the guide mechanism shown in FIG.

  Embodiments of a damper device to which the present invention is applied will be described below with reference to the drawings. In the following description, the rotation center axis of the rotating body is defined as the axis L, and among the directions in which the axis L extends, L1 is attached to the opening direction of the movable cover 20, and L2 is attached to the closing direction. explain. Further, Y is attached to the first direction orthogonal to the axis L, and X is attached to the second direction orthogonal to the axis L and intersecting the first direction Y. In this embodiment, the first direction Y is the vertical direction V, and the second direction X is the horizontal direction H. Further, Va is attached above the vertical direction V, and Vb below. Further, Ha is attached to one side in the horizontal direction H, and Hb is attached to the other side.

(overall structure)
FIG. 1 is a perspective view of a damper device 1 to which the present invention is applied. FIG. 1 (a) is a perspective view of a state in which a movable cover 20 is in a closed position, and FIG. It is a perspective view of a certain state. FIG. 2 is a cross-sectional view of the damper device 1 shown in FIG. 1 with the movable cover 20 in the closed position. FIG. 3 is an exploded perspective view of the damper device 1 shown in FIG. 1 with the support 10 removed. FIG. 4 is an exploded perspective view of the damper device 1 shown in FIG. 1 with the support 10 and the movable cover 20 removed. FIG. 5 is an exploded perspective view of the damper device 1 shown in FIG. 1 with the support 10, the movable cover 20, the drive unit 30, and the fan 50 removed. FIG. 6 is a perspective view of the movable cover 20 used in the damper device 1 shown in FIG. 1 as viewed from the opening direction L1. FIG. 7 is a perspective view of the movable cover 20 used in the damper device 1 shown in FIG. 1 as viewed from the closing direction L2.

  A damper device 1 shown in FIGS. 1 to 5 is a device that controls supply of fluid at an opening 110 of a fluid passage 100 such as a duct through which a fluid such as cold air flows. In this embodiment, the damper device 1 controls the supply of cold air in the refrigerator. The damper device 1 is linear in a movable cover 20 disposed so as to cover the opening 110 of the fluid passage 100, a closing direction L2 in which the movable cover 20 approaches the opening 110, and an opening direction L1 in which the movable cover 20 is separated from the opening 110. It has the drive unit 30 which drives, and the support body 10 which supports the drive unit 30. The support 10 has a plate portion 11 located on the opening direction L1 side with respect to the drive unit 30, and the plate portion 11 holds the drive unit 30 from the opening direction L1 side.

  The damper device 1 has a fixing member 60 for fixing the damper device 1 to the fluid passage 100. An opening 61 that overlaps the opening 110 of the fluid passage 100 is formed in the fixing member 60. Therefore, the movable cover 20 is switched by the drive unit 30 between a closed state in which the opening 61 of the fixing member 60 is covered and a closed state in which the opening 61 of the fixing member 60 is opened. When the damper device 1 is fixed to the fluid passage 100, the damper device 1 may be fixed by the plate portion 11.

  A fan 50 is fixed to the support 10 on the side of the movable cover 20 in the closing direction L2, and the fan 50 protrudes from the fixing member 60 in the opening direction L1. In this embodiment, the fan 50 is a centrifugal fan 51, and a plate 52 that supports a fan motor (not shown), an impeller 53 connected to the output shaft of the fan motor, and the blades of the impeller 53 are connected to each other. An annular connecting portion 54 to be connected is provided, and the cool air sucked from the openings 61 and 110 is perpendicular to the rotation center axis (axis L) as indicated by an arrow C in FIG. Discharge cold air.

  Accordingly, as shown in FIGS. 6 and 7, the movable cover 20 protrudes in the closing direction L2 from the end plate portion 21 so as to surround the fan 50 and the end plate portion 21 facing the fan 50 in the opening direction L1. The cylindrical trunk | drum 22 was provided.

  In this embodiment, as shown in FIGS. 1, 3, 4, and 5, when fixing the fan 50 to the support body 10, the support body 10 has a plurality of couplings protruding from the plate portion 11 in the closing direction L <b> 2. The shaft 12 is provided, and the distal end portion of the connecting shaft 12 is connected to the plate 52 of the fan 50. In this embodiment, three connecting shafts 12 are provided.

(Configuration of guide mechanism 15)
In this embodiment, each of the three connecting shafts 12 is used as a guide shaft of the guide mechanism 15 that guides the movable cover 20 when moving the movable cover 20 in the opening direction L1 and the closing direction L2. That is, the first guide shaft 121 is configured by one connection shaft 12 of the three connection shafts 12, and the second guide shaft 122 is configured by the other one connection shaft 12, and the remaining connection shafts. 12 constitutes a third guide shaft 123. On the other hand, semicircular protrusions 23 are formed at three locations on the outer peripheral surface of the cylindrical body portion 22 of the movable cover 20, and the first guide shaft 121 fits into each of the three protrusions 23. A first guide hole 231, a second guide hole 232 in which the second guide shaft 122 is fitted, and a third guide hole 233 in which the third guide shaft 123 is fitted are formed. In this embodiment, the three connecting shafts 12 are formed at equiangular intervals around the axis L. Therefore, the three connecting shafts (the first guide shaft 121, the second guide shaft 122, and the third guide shaft) are formed. Shaft 112) and three guide holes (first guide hole 231, second guide hole 232, and third guide hole 233) are also formed around the axis L at equiangular intervals.

(Configuration of drive unit 30)
FIG. 8 is an exploded perspective view of the drive unit 30 used in the damper device 1 shown in FIG. 1 as viewed from the opening direction L1. FIG. 9 is an exploded perspective view of the drive unit 30 used in the damper device 1 shown in FIG. 1 as viewed from the closing direction L2. FIG. 10 is an exploded perspective view of the geared motor 40 used in the drive unit 30 shown in FIG.

  As shown in FIGS. 8 and 9, the drive unit 30 includes a geared motor 40 and a rotating body 31 that rotates around the axis L by the geared motor 40. The rotating body 31 has a circular bottom plate portion 32 and a cylindrical portion 33 projecting in the opening direction L1 from the outer edge of the bottom plate portion 32. At the center of the bottom plate portion 32, an output gear 492 of the geared motor 40 is provided. A fitting nut portion 34 is formed. Therefore, when the output gear 492 rotates by supplying power to the geared motor 40, the rotating body 31 rotates around the axis L.

  An annular flange portion 35 protruding outward in the radial direction is formed at the end of the rotating body 31 in the closing direction L2. The flange portion 35 protrudes radially outward from a position adjacent to the bottom plate portion 32 in the closing direction L2. As will be described later, the flange portion 35 suppresses leakage of cold air between the drive unit 30 and the movable cover 20 when the movable cover 20 moves most in the closing direction L2. It should be noted that drain holes 350 are formed at two locations in the circumferential direction on the inner edge of the flange portion 35. The hole 350 is a portion that discharges water adhering to the cylindrical portion 33 or ice pieces scraped off from the cylindrical portion 33 to prevent the ice pieces from being caught between the flange portion 35 and the movable cover 20. . Note that, at a position adjacent to the hole 350 in the opening direction L1, an end portion 36a of the engaging portion 36 described later protrudes in the closing direction L2. The end 36a is a contact portion when the movable cover 20 abuts when the rotating body 31 rotates counterclockwise CCW and the movable cover 20 moves in the closing direction L2.

  As shown in FIGS. 8, 9, and 10, the geared motor 40 includes a motor main body 41 that is a drive source, and a transmission mechanism 45 that transmits the rotation of the motor main body 41 to the output gear 492. In this embodiment, the motor main body 41 is a stepping motor, and includes a power feeding unit 411 on the outer peripheral side of the stator 410. The geared motor 40 has a base plate 42 fixed to an attachment plate 415 fixed to the end of the motor body 41 in the closing direction L2, and a cup-shaped case 43 fixed so as to cover the base plate 42. A transmission mechanism 45 is disposed between the main plate 42 and the case 43. The main plate 42 and the case 43 are coupled by screws 44.

  As shown in FIG. 10, the transmission mechanism 45 includes a motor pinion 450 fixed to the motor shaft 413 of the motor body 41, a first gear 46 that meshes with the motor pinion 450, and a second gear 47 that meshes with the first gear 46. A third gear 48 that meshes with the second gear 47 and a fourth gear 49 that meshes with the third gear 48 are provided. The first gear 46, the second gear 47, and the third gear 48 are respectively rotatable to a first support shaft 460, a second support shaft 470, and a third support shaft 480 that are supported at both ends by the main plate 42 and the case 43. It is supported by. The fourth gear 49 is rotatably supported by a cylindrical portion 421 that protrudes from the main plate 42 in the closing direction L2.

The first gear 46 is a compound gear in which a large-diameter gear 461 that meshes with the motor pinion 450 and a small-diameter gear 462 having a smaller diameter than the large-diameter gear 461 are integrally formed. The second gear 47 is a composite gear in which a large-diameter gear 471 that meshes with the small-diameter gear 462 of the first gear 46 and a small-diameter gear 472 having a smaller diameter than the large-diameter gear 471 are integrally formed. The third gear 48 is a composite gear in which a large-diameter gear 481 meshing with the small-diameter gear 472 of the second gear 47 and a small-diameter gear 482 having a smaller diameter than the large-diameter gear 481 are integrally formed. The fourth gear 49 is a composite gear in which a large-diameter gear 491 that meshes with the small-diameter gear 482 of the third gear 48 and an output gear 492 that is smaller in diameter than the large-diameter gear 491 are integrally formed. The output gear 492 of the fourth gear 49 is fixed to the rotating body 31 by a screw 490 while being fitted to the nut portion 34 of the rotating body 31, and the fourth gear 49 and the rotating body 31 rotate integrally. Therefore, the transmission mechanism 45 is configured as a reduction gear mechanism, and the rotation of the motor main body 41 is decelerated and transmitted to the rotating body 31 via the transmission mechanism 45 (reduction gear mechanism).

(Configuration of the transmission unit 37 between the rotating body 31 and the movable cover 20)
In the present embodiment, the rotation of the rotating body 31 is transmitted to the movable cover 20 via the transmission unit 37 and drives the movable cover 20 along the axis L in the opening direction L1 and the closing direction L2. In this embodiment, the transmission unit 37 includes three guide shafts (first guide shaft 121, second guide shaft 122, and third guide shaft 123) and three guide holes (first guide hole 231 and second guide shaft). The feed screw mechanism 38 uses the hole 232 and the third guide hole 233) as an idling prevention mechanism.

  More specifically, on the outer peripheral surface of the cylindrical portion 33 of the rotating body 31, an engaging portion 36 formed of a spiral convex portion or a concave portion is formed. In the present embodiment, the engaging portion 36 includes two convex portions extending in a spiral shape, and the engaging portion 36 extends from the end portion in the opening direction L1 of the cylindrical portion 33 to the end portion in the closing direction L2. ing. Further, in the movable cover 20, a rotating body arrangement hole 25 in which a portion (cylindrical portion 33) where the engaging portion of the rotating body 31 is formed is formed in the center of the end plate portion 21. On the inner peripheral surface of the rotating body arrangement hole 25, an engaged portion 26 that is engaged with the engaging portion 36 and constitutes the engaging portion 36 and the feed screw mechanism 38 is formed. In the present embodiment, the engaged portion 26 is configured as a spirally extending groove, and the engaging portion 36 is in a state of being fitted inside the engaged portion 26. In this embodiment, when forming the groove (engaged portion 26), a part of the inner peripheral surface of the rotating body arrangement hole 25 in the circumferential direction is a thick part 27 projecting radially inward, and the thick part 27. In this structure, a groove (engaged portion 26) is formed. Here, the engaged portions 26 are formed at two locations in the circumferential direction.

  Accordingly, the portion sandwiched by the thick portion 27 in the circumferential direction is a notch 28 that is recessed radially outward. Therefore, as shown in FIG. 1, when the movable cover 20 moves in the opening direction L1 with the axis L oriented horizontally, the water attached to the outer peripheral surface of the rotating body 31 due to condensation is It falls to the inside of the movable cover 20 through the notch 28 and then flows downward from the movable cover 20. Therefore, condensation or the like hardly occurs on the outer peripheral surface of the rotating body 31.

  Further, in the present embodiment, a convex portion 29 protruding radially inward is formed on the inner peripheral surface of the rotating body arrangement hole 25 at a position where the notch 28 is formed. For this reason, when assembling the damper apparatus 1, the situation where the engaging part 36 of the rotary body 31 fits into the notch 28 can be avoided. In this embodiment, the convex portion 29 is formed at the approximate center of the notch 28 in the circumferential direction. The convex portions 29 may be formed at a plurality of locations of the notches 28.

(Detailed configuration in open and closed states)
In the damper device 1 of the present embodiment, when the rotating body 31 rotates around the axis L, the engaged portion 26 (groove) of the movable cover 20 is guided to the engaging portion (convex portion) of the rotating body 31, The movable cover 20 is driven along the axis L in the opening direction L1 and the closing direction L2.

  More specifically, when the rotating body 31 rotates in the clockwise direction CW around the axis L, the rotation is transmitted to the movable cover 20 via the feed screw mechanism 38. It moves in the opening direction L1 of the direction. As a result, as shown in FIG. 1B, the cylindrical body 22 of the movable cover 20 is separated from the opening 61, so that the fixed member 60 and the movable cover 20 are opened. For this reason, the cold air supplied from the fluid passage 100 is supplied into the refrigerator cabinet via the damper device 1 as indicated by an arrow C in FIG.

  On the other hand, when the rotating body 31 rotates counterclockwise about the axis L in the direction of CCW, the rotation is transmitted to the movable cover 20 via the feed screw mechanism 38. Move in the closing direction L2. As a result, as shown in FIG. 1A, the cylindrical body portion 22 of the movable cover 20 approaches the opening 61, so that the space between the fixed member 60 and the movable cover 20 is closed. For this reason, the cold air supplied from the fluid passage 100 is shut off, and the supply of the cold air into the refrigerator compartment is stopped.

  In this embodiment, when the movable cover 20 moves most in the opening direction L <b> 1, the end plate portion 21 of the movable cover 20 contacts the plate portion 11 of the support 10. Here, in the end plate portion 21 of the movable cover 20, the protruding portion 23 in which the guide holes (the first guide hole 231, the second guide hole 232, and the third guide hole 233) are formed is in addition to the end plate portion 21. Projecting in the opening direction L1. Further, in the end plate portion 21, an annular convex portion 250 is formed in the opening direction L <b> 1 from the edge of the rotating body arrangement hole 25. Projecting in the opening direction L1. Therefore, when the movable cover 20 moves most in the opening direction L <b> 1, the protruding portion 23 of the end plate portion 21 of the movable cover 20 contacts the plate portion 11 of the support 10.

  In this embodiment, a cylindrical or hemispherical protrusion 230 protruding in the opening direction L1 is formed on each of the three protrusions 23. In this embodiment, each of the three protrusions 230 is located adjacent to the first guide hole 231 (first guide shaft 121) on the outer side in the radial direction when viewed from the center of the movable cover 20, and the second guide hole 232 (second guide). The shaft 122) is adjacent to the outer side in the radial direction, and the third guide hole 233 (third guide shaft 123) is adjacent to the outer side in the radial direction.

  Further, in this embodiment, when the movable cover 20 moves most in the closing direction L2, the end plate portion 21 of the movable cover 20 is transmitted between the rotating body 31 of the drive unit 30 and the movable cover 20, as shown in FIG. The flange portion 35 formed on the rotating body 31 of the drive unit 30 approaches from the opening direction L1 side on the closing direction L2 side (opening portion 61 side) from the portion 37 (feed screw mechanism 38). Therefore, in the state where the movable cover 20 has moved most in the closing direction L2, the leakage of cold air is suppressed from the transmission portion 37 (feed screw mechanism 38) between the rotating body 31 of the drive unit 30 and the movable cover 20. Here, when the movable cover 20 moves most in the closing direction L2, either the configuration in which the end plate portion 21 of the movable cover 20 and the flange portion 35 of the rotating body 31 are in contact with each other, or the configuration in which the movable cover 20 is separated through a slight gap. In any case, it is possible to prevent the cold air from leaking from the transmission portion 37 (feed screw mechanism 38) between the rotating body 31 of the drive unit 30 and the movable cover 20. Further, when the movable cover 20 is moved most in the closing direction L2, when the end plate portion 21 of the movable cover 20 and the flange portion 35 of the rotating body 31 are in contact with each other, the rotating body 31 of the drive unit 30 and the movable cover are arranged. It is possible to further suppress the leakage of cold air from the transmission portion 37 (feed screw mechanism 38).

  In this embodiment, the end plate portion 21 is formed with an annular cylindrical rib 24 protruding in the closing direction L <b> 2 from around the rotating body arranging hole 25. It is formed to surround. Therefore, when the movable cover 20 moves most in the closing direction L2, the end plate portion 21 of the movable cover 20 is opened to the flange portion 35 formed on the rotating body 31 of the drive unit 30 via the cylindrical rib 24 in the opening direction L1. Approach from the side. Therefore, in the state where the movable cover 20 has moved most in the closing direction L2, the leakage of cold air is suppressed from the transmission portion 37 (feed screw mechanism 38) between the rotating body 31 of the drive unit 30 and the movable cover 20.

(Guide mechanism clearance)
FIG. 11 is an explanatory diagram of the guide mechanism shown in FIG. 4, and is a cross-sectional view when the position where the guide hole is formed is cut along a plane orthogonal to the axis L, and FIG. A state in which the clearance between the first guide hole 231, the second guide hole 232, and the third guide hole 233 and the guide shaft (the first guide shaft 121, the second guide shaft 122, and the third guide shaft 123) is enlarged is also illustrated. It is shown. In the guide mechanism 15 described with reference to FIG. 4 and the like, the gap between the outer peripheral surface of the first guide shaft 121 and the inner peripheral surface of the first guide hole 231 is a first orthogonal to the moving direction of the movable cover 20. The dimension Y1 in the direction Y is larger than the dimension X1 in the second direction X orthogonal to the moving direction of the movable cover 20 and intersecting the first direction Y. On the other hand, in the gap between the outer peripheral surface of the second guide shaft 122 and the inner peripheral surface of the second guide hole 232, the dimension X2 in the second direction X is larger than the dimension Y2 in the first direction Y. Further, the gap between the outer peripheral surface of the third guide shaft 123 and the inner peripheral surface of the third guide hole 233 is such that the dimension X3 in the second direction X is larger than the dimension Y3 in the first direction Y. That is, the first guide hole 231, the second guide hole 232, and the third guide hole 233 are slid after being aligned with the first guide shaft 121, the second guide shaft 122, and the third guide shaft 123. The optimum clearance is set in the vertical direction V and the horizontal direction H.

  In this configuration, for example, the first guide shaft 121, the second guide shaft 122, and the third guide shaft 123 are formed in a perfectly circular cross section, while the first guide hole 231, the second guide hole 232, and the third guide hole are formed. 233 can be realized by forming an ellipse. The first guide shaft 121, the second guide shaft 122, and the third guide shaft 123 are formed in an oval cross section, while the first guide hole 231, the second guide hole 232, and the third guide hole 233 are true. It can also be realized by forming a circular shape.

  In this embodiment, the moving direction of the movable cover 20 (the extending direction of the axis L) and the second direction X are the horizontal direction H, and the first direction Y is the vertical direction V. Accordingly, the gap between the outer peripheral surface of the first guide shaft 121 and the inner peripheral surface of the first guide hole 231 is larger in the vertical direction V than in the horizontal direction H. In contrast, the gap between the outer peripheral surface of the second guide shaft 122 and the inner peripheral surface of the second guide hole 232 is larger in the horizontal direction H than in the vertical direction V. Further, the gap between the outer peripheral surface of the third guide shaft 123 and the inner peripheral surface of the third guide hole 233 is larger in the horizontal direction H than in the vertical direction V. Therefore, in this embodiment, the guide shafts (first guide shaft 121, second guide shaft 122, and third guide shaft 123) are guide holes (first guide hole 231, second guide hole 232, and third guide hole). 233) of the inner peripheral surface slides with a portion having a narrow clearance. In the present embodiment, the first guide shaft 121 is displaced with respect to the first direction Y with respect to the second guide shaft 122 and the third guide shaft 123, and the second guide shaft 122 and the third guide in the second direction X. It is located between the shaft 123. Further, the second guide shaft 122 and the third guide shaft 123 are in the same position in the first direction Y.

  In the guide mechanism configured as described above, the first guide shaft 121, the second guide shaft 122, and the third guide shaft 123 are arranged in the horizontal direction H. For this reason, when the movable cover 20 moves in the opening direction L1 and the closing direction L2 with gravity applied to the lower direction Vb in the vertical direction V, the second guide shaft 122 and the third guide shaft 123 are respectively The slider slides in contact with the upper portion 232a of the inner surface of the guide hole 232 and the upper portion 233a of the inner surface of the third guide hole 233.

Further, when the movable cover 20 moves in the opening direction L 1, the movable cover 20 tries to rotate clockwise CW, but the rotation stop at that time is the inner surface of the first guide hole 231 with respect to the first guide shaft 121. In this state, the first guide shaft 121 and the one-side Ha portion 231a in the horizontal direction H of the inner surface of the first guide hole 231 slide with each other. Move. On the other hand, when the movable cover 20 moves in the closing direction L2, the movable cover 20 tries to rotate counterclockwise CCW, but the rotation stop at that time is the first guide shaft 121 with respect to the first guide shaft 121. The portion 231b on the other side Hb in the horizontal direction H on the inner surface of the hole 231 is blocked by contact, and in this state, the portion on the other side Hb in the horizontal direction H on the inner surface of the first guide shaft 121 and the first guide hole 231. 231b slides. Even in such a case, since the first guide hole 231 is oval, rattling does not occur, and a situation in which the movable cover 20 becomes difficult to move due to too little clearance.

(Main effects of this form)
As described above, in the damper device 1 of the present embodiment, when the movable cover 20 is moved in the opening direction L1 by the drive unit 30, the cold air supplied from the opening 61 can be discharged to the outside of the movable cover 20. On the other hand, when the movable cover 20 is moved in the closing direction L2, the opening 61 is covered, so that the outflow of cold air can be stopped.

  Further, the drive unit 30 protrudes in a direction orthogonal to the drive direction (axis L direction) of the movable cover 20 on the opening 61 side from the transmission portion 37 (feed screw mechanism 38) from the drive unit 30 to the movable cover 20. A flange portion 35 is provided, and when the movable cover 20 moves most in the closing direction L2, the movable cover 20 approaches the flange portion 35 from the opening direction L1 side. For this reason, when the movable cover 20 moves most in the closing direction L2, the leakage of cold air from between the movable cover 20 and the drive unit 30 can be suppressed.

  In addition, the movable cover 20 includes a cylindrical rib 24 that protrudes toward the flange portion 35 so as to surround the transmission portion 37. When the movable cover 20 moves most in the closing direction L2, the movable cover 20 The flange portion 35 approaches through the cylindrical rib 24. For this reason, when the movable cover 20 moves to the closing direction L2, the movable cover 20 and the flange part 35 can be made to approach reliably. Even when the movable cover 20 and the flange portion 35 come into contact with each other, if the cylindrical rib 24 is provided, the contact area between the movable cover 20 and the flange portion 35 is narrow, so that the movable cover 20 and the flange portion 35 are frozen. It is difficult for the situation to stop moving.

  Further, in order to allow the movable cover 20 to approach the flange portion 35 of the drive unit 30 from the opening direction L1, the support 10 supports the drive unit 30 from the side opposite to the side where the opening 61 is located (the side in the opening direction L1). Even if it is the mode currently performed, when the movable cover 20 moves to the closing direction L2, the leak of the cold from between the movable cover 20 and the drive unit 30 can be suppressed.

  In particular, in this embodiment, since the notch 28 is formed on the inner peripheral surface of the rotating body arrangement hole 25, dewed water or the like flows out from the gap between the notch 28 of the rotating body arrangement hole 25 and the rotating body 31. Can be made. In this case, there is a possibility that cold air may leak from the notch 28 when the movable cover 20 moves most in the closing direction L2, but in this embodiment, the movable cover 20 approaches the flange portion 35 from the opening direction L1 side. The leakage of cold air from the cutout 28 can be suppressed.

  In addition, when the notch 28 is provided in the rotating body arrangement hole 25, when the damper device 1 is assembled, the engaging portion 36 of the rotating body 31 may be fitted into the notch 28. However, in this embodiment, the notch 28 protrudes. A portion 29 is formed. For this reason, when assembling the damper apparatus 1, the situation where the engaging part 364 of the rotary body 31 fits into the notch 28 can be avoided.

  The support 10 supports a fan 50 via a plurality of connecting shafts 12 on the side of the movable cover 20 in the closing direction L <b> 2, and the guide mechanism 15 uses the plurality of connecting shafts 12. It is configured. For this reason, when the movable cover 20 is driven, a situation such as the movable cover 20 tilting hardly occurs.

  In the guide mechanism 15, the gap between the outer peripheral surface of the first guide shaft 121 and the inner peripheral surface of the first guide hole 231 is larger in the first direction Y than in the second direction X. On the other hand, the gap between the outer peripheral surface of the second guide shaft 122 and the inner peripheral surface of the second guide hole 232 is larger in the X direction in the second direction than in the first direction Y. Further, the gap between the outer peripheral surface of the third guide shaft 123 and the inner peripheral surface of the third guide hole 233 is larger in the second direction X than in the first direction Y. For this reason, even if a variation in clearance occurs during manufacturing, an excessive load does not occur. Further, even if expansion or contraction due to temperature change occurs, no excessive load is generated. Therefore, the opening 61 can be smoothly opened and closed by the movable cover 20. In particular, in this embodiment, since the three guide shafts (the first guide shaft 121, the second guide 122, and the third guide shaft 123) are used, the movable cover 20 can be guided in a stable state, Since the gap satisfies the above condition, the opening 61 can be smoothly opened and closed by the movable cover 20 even when the guide shaft is increased.

Further, since the fan 50 is the centrifugal fan 51, even when the movable cover 20 is disposed on the opening direction L1 side, the cold air can be allowed to flow without being obstructed by the movable cover 20.
Further, when the movable cover 20 moves most in the opening direction L1, the support body 10 and the movable cover 20 come into contact with each other, but the support body 10 and the movable cover 20 are connected via a protrusion 230 formed on the movable cover 20. Abut. For this reason, the support body 10 and the movable cover 20 contact | abut reliably. In addition, since the support 10 and the movable cover 20 are in contact with each other via the protrusion 230, the contact area is narrow. For this reason, it is difficult for the support 10 and the movable cover 20 to freeze and stop moving. In addition, since the plurality of protrusions 230 are formed, the support 10 and the movable cover 20 are reliably in contact with each other via the protrusions 230. In addition, since the protrusions 230 are formed at the three locations, the support 10 and the movable cover 20 reliably come into contact with each other at the three locations. Further, when viewed from the center of the movable cover 20, the three locations where the protrusions 230 are formed are locations adjacent to the first guide shaft 121 on the radially outer side, and locations adjacent to the second guide shaft 122 on the radially outer side. And the third guide shaft 123 adjacent to the outer side in the radial direction. For this reason, since the support body 10 and the movable cover 20 are in contact with each other through the protrusion 230 at a position away from the center of the movable cover 20, when the support body 10 and the movable cover 20 are in contact, the movable cover 20 is It is hard to tilt.

(Other forms)
In the above embodiment, the guide shaft is formed on the support 10 side, but the guide shaft may be provided on the movable cover 20 side. In this case, a guide hole is formed on the support 10 side.

  In the above embodiment, when the movable cover 20 is moved most in the closing direction L2, the flange portion 35 of the drive unit 30 and the movable cover 20 are brought into contact with each other via the cylindrical rib 24 formed on the movable cover 20. However, the cylindrical rib 24 may be formed on the flange portion 35 side.

In the above embodiment, when the movable cover 20 is moved most in the opening direction L1, the support 10 and the movable cover 20 are brought into contact with each other via the protrusion 230 formed on the movable cover 20, but the support 10 Protrusion 230 may be formed on the side of this.
In the said embodiment, although the connection shaft 12 which connects the support body 10 and the fan 50 was utilized as a guide shaft, you may comprise the connection shaft 12 and a guide shaft by another axis | shaft. When the connecting shaft 12 and the guide shaft are constituted by different shafts, a stable guide portion can be realized by lengthening the overlap in the axial direction between the guide hole and the guide shaft. That is, when the connecting shaft 12 is used as a guide shaft, only the plate thickness becomes a sliding portion between the guide hole and the connecting shaft 12 (guide shaft), but the connecting shaft 12 and the guide shaft are separated from each other. In this case, it is easy to thicken the portion constituting the guide hole and lengthen the sliding portion between the guide hole and the guide shaft in the axial direction.

In the above-described embodiment, the present invention is applied to the damper device 1 attached to the fluid passage 100 through which cold air (fluid) flows. The present invention may be applied.

H: horizontal direction (second direction), V: vertical direction (first direction) L: axis, L1 ... open direction, L2 ... closed direction, X ... second direction, Y ... first direction, 1 ... damper device, DESCRIPTION OF SYMBOLS 10 ... Support body, 11 ... Plate part, 12 ... Connecting shaft, 15 ... Guide mechanism, 20 ... Movable cover, 21 ... End plate part, 22 ... Cylindrical trunk part, 23 ... Projection part, 24 ... Cylindrical rib, 25 Rotating body arrangement hole, 26 ... engaged portion, 27 ... thick portion, 28 ... notch, 29 ... convex portion, 30 ... drive unit, 31 ... rotating body, 32 ... bottom plate portion, 33, 421 ... cylindrical portion 35 ... Flange part, 36 ... Engagement part, 37 ... Transmission part, 38 ... Feed screw mechanism, 40 ... Geared motor, 41 ... Motor body, 42 ... Base plate, 43 ... Case, 45 ... Transmission mechanism, 50 ... Fan, DESCRIPTION OF SYMBOLS 51 ... Centrifugal fan, 52 ... Plate, 53 ... Impeller, 60 ... Fixing member, 61, 110 ... Opening part, 1 0 ... fluid passage 121 ... first guide shaft, 122 ... second guide shaft, 123 ... third guide shaft, 230 ... projection, 231 ... first guide hole, 232 ... second guide hole 233 ... third guide hole

Claims (16)

A movable cover arranged to cover the opening;
A drive unit for linearly driving the movable cover in a closing direction approaching the opening and an opening direction separating from the opening;
A support that supports the drive unit from the side in the opening direction;
Have
One member of the support and the movable cover is provided with a first guide shaft and a second guide shaft extending along the moving direction of the movable cover,
The other member of the support body and the movable cover is provided with a first guide hole into which the first guide shaft is fitted and a second guide hole into which the second guide shaft is fitted,
The gap between the outer peripheral surface of the first guide shaft and the inner peripheral surface of the first guide hole has a dimension in a first direction orthogonal to the moving direction of the movable cover, relative to the moving direction of the movable cover. Orthogonally greater than a dimension in a second direction intersecting the first direction;
The damper device characterized in that the gap between the outer peripheral surface of the second guide shaft and the inner peripheral surface of the second guide hole has a dimension in the second direction larger than a dimension in the first direction. The one member is the support;
The damper device according to claim 1, wherein the other member is the movable cover. The moving direction of the movable cover and the second direction are horizontal directions,
The damper device according to claim 1, wherein the first direction is a vertical direction. The one member is provided with a third guide shaft extending along the moving direction of the movable cover,
The other member is provided with a third guide hole into which the third guide shaft is fitted,
The clearance between the outer peripheral surface of the third guide shaft and the inner peripheral surface of the third guide hole has a dimension in the second direction larger than a dimension in the first direction. 4. The damper device according to any one of up to 3.   The first guide shaft is displaced with respect to the first direction with respect to the second guide shaft and the third guide shaft, and the second guide shaft and the third guide shaft are arranged in the second direction. The damper device according to claim 4, wherein the damper device is located in between.   The damper device according to claim 4 or 5, wherein the support body and the movable cover abut on each other when the movable cover moves most in the opening direction. A protrusion protruding toward the other is formed on one of the support and the movable cover,
The damper device according to claim 6, wherein the support and the movable cover abut against each other via the protrusion when the movable cover moves most in the opening direction.   The damper device according to claim 7, wherein a plurality of the protrusions are formed.   The damper device according to claim 8, wherein the protrusions are formed at three locations.   Each of the three locations, when viewed from the center of the movable cover, is a location adjacent to the first guide shaft on the radially outer side, a location adjacent to the second guide shaft on the radially outer side, and the third guide shaft. The damper device according to claim 9, wherein the damper device is a portion adjacent to the outside in the radial direction. The drive unit has a drive source and an engagement portion formed of a spiral convex portion or a concave portion on an outer peripheral surface, and is driven by the drive source around an axis extending along the moving direction to the movable cover. A rotating body that rotates,
The movable cover is engaged with the engaging portion on the inner surface of the rotating member disposing hole, and a rotating member disposing hole in which a portion where the engaging portion of the rotating member is formed is disposed inside. The damper device according to any one of claims 1 to 10, further comprising an engaging portion and an engaged portion constituting a feed screw mechanism. A fan is supported on the support body on the side in the closing direction with respect to the movable cover,
The movable cover includes an end plate portion facing the fan in the opening direction, and a cylindrical body portion protruding from the end plate portion toward the closing direction so as to surround the fan.
The damper device according to claim 11, wherein the rotating body arrangement hole is formed in the end plate portion.   The damper device according to claim 12, wherein the fan is a centrifugal fan.   The damper device according to claim 12 or 13, comprising a plurality of connecting shafts for connecting the support and the fan. The one member is the support;
The other member is the movable cover;
The damper device according to claim 12 or 13, wherein the support and the fan are connected by the first guide shaft and the second guide shaft.   The damper device according to any one of claims 1 to 15, wherein cold air is supplied through the opening.

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