JP2012112610A - Damper device and article storage device with the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a damper device of high reliability, which executes reliable opening and closing operation.SOLUTION: In a driving gear 13, a gear part 13b which engages with a follower gear 14 when a baffle is operated from open to close or from close to open, and comes out from the engagement with the follower gear 14, and a holding part 13c which holds the coming out state from the engagement with the follower gear 14 in the closed state are provided. The holding part 13c is formed to be circular shape of the same or a little larger size of the circle diameter of the gear top of the gear part 13b and the height is made to be lower than that of the gear part 13b. In the follower gear 14, a sector shaped gear 15 which engages with the gear part 13b of the driving gear 13 is provided. The height of a tooth 14c among the teeth of the sector shaped gear 15, which comes in contact with the holding part 13c of the driving gear 13 in the close state and holds the close position of the follower gear 14, is made about the same as the height of the holding part 13c. In this manner, during opening operation, the interference of the gear part 13b of the driving gear 13 with the sector shaped gear part 15 of the follower gear 14 can be prevented, and soundless opening and closing operations can be made definite.

Description

  The present invention relates to a damper device that is provided in a cold air passage inside a storage room in a refrigerator or the like and is used for adjusting the temperature by opening and closing the air passage, and an article storage device including the damper device. It is.

  Conventionally, as a means for controlling the temperature of a plurality of refrigerator compartments provided in a refrigerator, the air flow from the cooler to each refrigerator compartment is opened and closed by a baffle, and the amount of cold air flowing into each refrigerator compartment is controlled. A damper device to be controlled is employed. These are roughly divided into a system in which one baffle is operated by one driving source and a system in which two baffles are operated by one driving source.

  A system in which one baffle is operated by one drive source is one in which one opening is opened and closed by rotation control of a motor (see, for example, Patent Document 1).

  Hereinafter, a conventional damper device described in Patent Document 1 will be described with reference to FIGS.

  10 is a front view including a partial cross-sectional configuration of a conventional damper device, FIG. 11 is a side view including a partial cross-sectional configuration of the conventional damper device, and FIG. 12 is a state in which a baffle in the conventional damper device is closed. FIG. 13 is a plan view of the drive unit with the baffle open in the conventional damper device, FIG. 14 is a plan view of the drive gear in the conventional damper device, and FIG. 15 is the conventional damper device. FIG. 16 is a plan view of the driven gear in the conventional damper device, and FIG. 17 is a side view of the driven gear in the conventional damper device.

  As shown in FIGS. 10 and 11, the conventional damper device 100 described in Patent Document 1 includes a resin frame 101, a baffle 103 that opens and closes an opening 102 formed in the frame 101, and a frame 101. And a drive unit 104 that rotationally drives the baffle 103, a plate-like opening forming part 105 that forms a part of the frame 101 and forms the opening 102, and the baffle 103 is formed around the opening 102. It has the structure which provided the protrusion part 106 which protruded toward.

  A soft foam 107 is attached to the baffle 103 on the surface facing the protruding portion 106.

  As shown in FIGS. 10, 12, and 13, the drive unit 104 includes a case 108 that is open on one side and forms an outer shell, and a geared type motor that can rotate forward and backward as a drive source and has a reduction mechanism inside. 109, a pinion 110 attached to the output shaft of the motor 109, a pinion 110, a drive gear 111 for controlling the opening / closing operation of the baffle 103 while reducing the rotation of the motor 109, and the drive gear 111 The driven gear 112 is engaged with the baffle 103 and transmits the rotation of the drive gear 111 to the baffle 103.

  In addition, in a state in which a projecting (fan-shaped) projecting portion 108 b that protrudes from the inner surface of the side wall 108 a facing the opening of the case 108 is fitted in an arc-shaped recess 111 a provided in the drive gear 111. The drive gear 111 is set to rotate by a predetermined angle.

  As shown in FIGS. 14 and 15, the drive gear 111 includes four recesses 111 a that regulate the rotation angle described above, and four that protrude in the axial direction of the drive gear 111 and mesh with the driven gear 112 only when the baffle 103 is opened and closed. It has the structure which has the gear part 111b which has a tooth | gear, and the holding | maintenance part 111c formed over the whole region except the gear part 111b.

  And the holding | maintenance part 111c is made into the circular shape of the diameter slightly larger than the tooth tip circle diameter of the gear part 111b, and is formed so that it may become lower than the gear part 111b in an axial direction.

  As shown in FIGS. 16 and 17, the driven gear 112 includes a shaft portion 112 a connected to the baffle 103, a sector gear portion 112 b provided on the shaft portion 112 a and having nine teeth, and a holding portion for the drive gear 111. In order to avoid interference with the gear 111c, the fan gear 112b has two cutout portions 112c and 112d, and the teeth of the fan gear 112b have a tooth height. It is almost the same height as the gear portion 111b.

  The operation of the conventional damper device configured as described above will be described below.

  First, when the motor 109 is rotated so that the baffle 103 rotates in the opening direction from the closed state and the driving gear 111 is rotated, the holding portion 111c of the driving gear 111 and the sector gear portion 112b of the driven gear 112 face each other. The driven gear 112 is maintained in the closed position while the driven gear 112 is not engaged, so that the baffle 103 is maintained in the closed state and the drive gear 111 is further rotated to rotate the gear portion 111b of the drive gear 111. And the fan gear 112b of the driven gear 112 mesh with each other, the driven gear 112 rotates, and the baffle 103 rotates in the opening direction as the shaft 112a rotates.

  When the rotation of the drive gear 111 is disengaged, the gear portion 111b and the sector gear portion 112b of the driven gear 112 are disengaged, the rotation of the driven gear 112 is stopped, and the baffle 103 is opened and further continued. Due to the rotation of the driving gear 111, the notch 112c of the driven gear 112 and the holding portion 111c of the driving gear 111 face each other, and the holding portion 111c of the driving gear 111 and the driven gear 112 do not interfere with each other.

  In the above state, although the drive gear 111 continues to rotate, the driven gear does not rotate, the open position of the driven gear is maintained, and the baffle 103 is maintained open. Further, the drive gear 111 is rotated to stop the rotation of the drive gear 111 at a position immediately before the fan-shaped concave portion 111a provided on the drive gear 111 and the fan-shaped convex portion 108b provided on the case 108 abut or abut. End the operation.

  Next, when the motor 109 is rotated in the closing direction from the open state and the driving gear 111 is rotated in the reverse direction, while the holding portion 111c of the driving gear 111 and the sector gear portion 112b of the driven gear 112 are in contact with each other, Since the driven gear 112 is kept open, the baffle 103 is kept open.

  When the drive gear 111 is further rotated, the gear portion 11b of the drive gear 111 and the sector gear portion 112b of the driven gear 112 mesh with each other, whereby the driven gear 112 rotates in the reverse direction and the baffle 103 closes. Rotate to.

  Further, when the rotation further continues and the meshing between the gear portion 111b of the drive gear 111 and the sector gear portion 112b of the driven gear 112 is disengaged, the rotation of the driven gear 112 is stopped and the baffle 103 is closed.

Further, due to the continued rotation of the drive gear 111, the holding portion 111c of the drive gear 111 and a part of the teeth of the sector gear portion 112b of the driven gear 112 come into contact with each other, and the notch portion 112c of the driven gear 112 faces each other. The holding portion 111c of the gear 111 and the driven gear 112 do not interfere with each other.

  In the above state, the drive gear 111 continues to rotate in the reverse direction, but the closed position of the driven gear 112 is maintained. As a result, the baffle 103 is maintained in the closed state. Further, the drive gear 111 is rotated, and the rotation of the drive gear 111 is stopped at the position where the fan-shaped concave portion 111a provided on the drive gear 111 and the fan-shaped convex portion 108b provided on the case 108 come into contact or just before contact. End the operation.

JP 2008-309408 A

  However, in the above-described conventional configuration, each component is generally a resin molded component, and the influence of the inclination of the drive gear 111 and the driven gear 112 with respect to the axial direction due to the rattling of the component fitting portion, the warp or sink marks during molding, and the like. In the axial direction of the gear portion 111b of the drive gear 111 and the sector gear portion 112b of the driven gear 112, the position immediately before the engagement of the drive gear 111 and the driven gear 112 during the opening operation and the closing operation is started. Since the tooth height of the sector gear portion 112b of the driven gear 112 is substantially the same as the gear portion 111b of the driving gear 111 and is higher than that of the holding portion 111c, the driven gear 112 in contact with the holding portion 111c of the driving gear 111 is used. The end of the tooth of the fan-shaped gear portion 112b should enter the inside of the tooth tip circle of the gear portion 111b of the drive gear 111, and should not be in contact with it. Among the teeth of the sector gear 112c of the driven gear 112, the end of the tooth that is in contact with the holding portion 111c and the tip of the tooth of the end of the gear 111b of the drive gear 111 may come into contact with each other. There was a problem that there was a risk of generating sound or disturbing operation in the worst case.

  The present invention solves the above-described conventional problems. The damper device has a quiet operation sound, high reliability of opening / closing operation, and high reliability of temperature control, and reliability of temperature control using the damper device. It is an object of the present invention to provide an article storage device having high performance and stable temperature control.

  In order to solve the above-described conventional problems, the damper device of the present invention includes a drive unit, a case that forms an outer shell, a drive source that can rotate forward and reverse, a drive gear that can transmit the rotation of the drive source, The driven gear is configured to be driven and rotated by the drive gear, and the drive gear meshes with the driven gear when the baffle is operated from open to closed or from closed to open, and the driven gear is in a closed state. And a holding portion that holds the driven gear in a disengaged state when in the closed state, and the holding portion is slightly the same as or slightly larger than the tooth tip circle diameter of the gear portion. A large circular shape and a height lower than the height of the gear portion, the driven gear is provided with a sector gear portion that meshes with the gear portion of the drive gear, and among the teeth of the sector gear portion, when in the closed state A holding portion of the drive gear; And, the height of the teeth to hold the closed position of the driven gear, is obtained by substantially the same height as the holding portion.

  Further, the gear portion of the drive gear is configured to be disengaged from the driven gear even in the open state, and the holding portion is configured to hold the open state of the driven gear, and the sector of the driven gear. Of the teeth of the gear portion, the height of the teeth that are in contact with the holding portion of the drive gear in the open state and hold the open position of the driven gear is substantially the same as the holding portion.

  Therefore, the axial direction of the gear portion of the drive gear and the sector gear portion of the driven gear due to the influence of the rattling of the component fitting portion with respect to the axial direction of the drive gear and the driven gear, warpage, sink marks, etc. during molding Of the holding part of the driving gear and the fan-shaped gear part of the driven gear, the teeth that are in contact with the holding part in the closed state and the teeth that are in the closed state are in contact with the holding part in the open state. Since the height of the teeth that hold the open state is substantially the same as the height of the holding portion, it is possible to prevent the gear portion of the drive gear and the sector gear portion of the driven gear from interfering during the opening / closing operation.

  As a result, no abnormal noise is generated during the opening / closing operation, the opening / closing operation can be performed quietly and reliably, and the reliability of temperature control can be improved.

  The damper device of the present invention has a quiet opening / closing operation, a high reliability of the opening / closing operation, and a high reliability of temperature control.

  Furthermore, the article storage device provided with such a damper device can stabilize the airflow control for temperature adjustment and obtain a temperature control effect with improved reliability.

The front view including the partial cross section structure of the damper apparatus in Embodiment 1 of this invention Rear view of the damper device of the same embodiment AA line sectional view of FIG. Side view including a partial cross-sectional configuration of the damper device of the same embodiment The top view of the drive part of the state which the baffle in the damper apparatus of the embodiment closed The top view of the drive part of the state which the baffle in the damper apparatus of the embodiment opened The perspective view which shows the positional relationship of the drive gear and the driven gear of the state which the baffle in the damper apparatus of the embodiment closed The perspective view which shows the positional relationship of the drive gear and the driven gear of the state which the baffle opened in the damper apparatus of the embodiment The schematic diagram which shows the structure of the goods storage chamber in Embodiment 2 of this invention. Front view including a partial cross-sectional configuration of a conventional damper device Side view including a partial cross-sectional configuration of the conventional damper device The top view of the drive part in the state where the baffle in the conventional damper device was closed The top view of the drive part in the state where the baffle opened in the conventional damper device Plan view of drive gear in the conventional damper device Side view of drive gear in the conventional damper device Plan view of driven gear in the conventional damper device Side view of driven gear in the conventional damper device

According to a first aspect of the present invention, there is provided a damper device including a frame having an opening, a baffle that opens and closes the opening, and a driving unit that drives the baffle. A drive source capable of rotating, a drive gear capable of transmitting the rotation of the drive source, and a driven gear driven to rotate by the drive gear are provided, and the baffle is opened or closed from the open or closed to the drive gear. A gear portion that meshes with the driven gear when operating in a closed state, and disengages from the driven gear when in a closed state; and a holding portion that holds the state where the driven gear disengages when in the closed state. And the holding portion has a circular shape that is the same as or slightly larger than the tooth tip diameter of the gear portion and has a height lower than the height of the gear portion, and the driven gear includes a gear portion of the driving gear and Meshing A sector gear portion is provided, and among the teeth of the sector gear portion, the height of the teeth that are in contact with the holding portion of the drive gear in the closed state and hold the closed position of the driven gear is substantially the same as the holding portion. That's what it is.

  By adopting such a configuration, the driving gear and the driven gear are tilted with respect to the axial direction due to rattling of the component fitting portion, and the fan gear portion of the driving gear and the fan shape of the driven gear due to the influence of warpage or sink marks at the time of molding. Even if the inclination of the gear portion in the axial direction occurs, among the fan-shaped gear portions of the driven gear, the height of the teeth that are in contact with the holding portion in the closed state and hold the closed position of the driven gear is maintained. Since the height is substantially the same as the height of the portion, it is possible to prevent the teeth that hold the closed position of the gear portion of the drive gear and the driven gear from interfering during the opening operation.

  As a result, no abnormal noise is generated during the opening operation, the opening operation can be performed reliably and quietly, and the reliability of temperature control can be improved.

  In a second aspect of the invention, in particular, in the first aspect of the invention, the gear portion of the drive gear is configured to be disengaged from the driven gear even in the open state, and the holding portion is in the open state of the driven gear. Of the teeth of the fan-shaped gear portion of the driven gear, the height of the teeth that are in contact with the holding portion of the drive gear and hold the open position of the driven gear in the open state is set to the holding portion. Is almost the same height.

  By adopting such a configuration, the driving gear and the driven gear are tilted with respect to the axial direction due to rattling of the component fitting portion, and the fan gear portion of the driving gear and the fan shape of the driven gear due to the influence of warpage or sink marks at the time of molding. Even if the gear portion is tilted in the axial direction, the height of the teeth that are in contact with the holding portion in the open state and hold the open position of the driven gear is substantially the same as the height of the holding portion. Therefore, it is possible to prevent interference between the gear portion of the drive gear and the teeth that hold the open position of the driven gear during the closing operation.

  As a result, no abnormal noise is generated during the closing operation, the closing operation can be performed quietly and reliably, and the reliability of temperature control can be improved.

  According to a third aspect of the present invention, there is provided an article storage chamber formed by a heat insulating space, a refrigeration cycle in which a compressor, a condenser, a decompression device, and an evaporator are connected in an annular shape through a pipe, and a temperature by the evaporator or the condenser. In the storage device having a blowing means for sending a regulated air flow into the article storage chamber, one end of the blowing means is opened in the temperature control chamber in which the condenser or the evaporator is arranged, and the other end is in the article storage chamber. It is set as the structure which comprises the air blower circuit which opened, the air blower provided in the said temperature control room or the said air blow circuit, and the damper apparatus provided in the said air blow circuit, and the said damper apparatus is 1st or 2nd invention. This is an article storage device as a damper device.

  By adopting such a configuration, it is possible to ensure the opening and closing operation of the air passage when the refrigerator is installed, and to improve the reliability of the temperature control, to stabilize the air flow control for temperature adjustment of the article storage device, and to be reliable An article storage device with improved properties can be obtained.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
1 is a front view including a partial cross-sectional configuration of a damper device according to Embodiment 1 of the present invention, FIG. 2 is a rear view of the damper device of the same embodiment as viewed from the back side, and FIG. AA line sectional view of a damper device, FIG. 4 is a side view including a partial sectional configuration of the damper device of the embodiment,
5 is a plan view of the drive unit in the state where the baffle is closed in the damper device of the same embodiment, FIG. 6 is a plan view of the drive unit in the state where the baffle is opened in the damper device of the same embodiment, FIG. FIG. 8 is a perspective view showing the positional relationship between the drive gear and the driven gear in a state where the baffle is closed in the damper device of the same embodiment; FIG. 8 is a diagram of the drive gear in the state where the baffle is opened in the damper device of the same embodiment; It is a perspective view which shows the positional relationship of a driven gear.

  First, the structure of the damper device 1 will be described with reference to FIGS. 1 to 3.

  As shown in FIGS. 1, 2, and 3, the damper device 1 includes a resin frame 5, a baffle 3 that opens and closes an opening 2 formed in the frame 5, and a baffle 3 that is attached to the frame 5. A drive part 4 that rotates and a part of the frame 5, a plate-like opening forming part 6 that forms the opening 2, and a protrusion that is formed around the opening 2 and protrudes toward the baffle 3 7 is provided.

  A soft foam 8 is attached to the baffle 3 on the surface facing the protruding portion 7.

  The frame 5 has a side wall 9 extending vertically from the opening forming portion 6 on the outer periphery of the opening forming portion 6, and the opening forming portion 6 is disposed at an end of the side wall 9. And the attaching part 5a for attaching the drive part 4 is provided, and it serves also as the cover of case 10 mentioned later.

  Next, the structure of the drive unit 4 will be described with reference to FIGS. 1 and 4 to 6.

  As shown in FIG. 1 and FIG. 4 to FIG. 6, the drive unit 4 is a geared type that has a case 10 that is open on one side and that forms an outer shell, and a forward / reverse rotation that is a drive source and that has a reduction mechanism inside. A motor 11, a pinion 12 attached to the output shaft of the motor 11, a gear 11 that meshes with the pinion 12, decelerates the rotation of the motor 11, and controls the opening / closing operation of the baffle 3; The driven gear 14 is connected to the baffle 3 and transmits the rotation of the drive gear 13 to the baffle 3.

  The case 10 is provided with columnar shaft portions 10b and 10c protruding from the inner surface of the side wall 10a facing the opening of the case 10, and the drive gear 13 is rotatably supported by 10b, and the driven gear 14 is supported by 10c. Is rotatably supported.

  Here, in the present embodiment, a pulse-type DC motor is adopted as the motor 11, and drive control is performed by a known control in which the rotation angle of the motor 11 is controlled according to the number of pulses applied. Has been done.

  Further, the case 10 and the drive gear 13 are provided with a rotation angle restricting means for restricting the rotation angle of the drive gear 13. Specifically, an arc that protrudes from the inner surface of the side wall 10 a of the case 10 is drawn. The fan-shaped convex portion 10 d is configured to be fitted into a fan-shaped concave portion 13 a that draws an arc provided in the drive gear 13. The concave portion 13a has a longer circumference than the convex portion 10d, and is set to have a dimensional relationship in which the drive gear 13 rotates by a predetermined angle in a state where the convex portion 10d is fitted.

  And the convex part 10d is a fan shape centering on the axial part 10b, and becomes a shape connected with the axial part 10b.

  In the present embodiment, the rotation angle of the drive gear 13 is set to about 120 °, and the rotation angle of the driven gear 14 is set to about 90 °.

  That is, the dimensions of the convex portion 10d and the concave portion 13a are such that when the drive gear 13 rotates about 120 ° in one direction, one end of the convex portion 10d abuts on one end of the concave portion 13a and rotates about 120 ° in the opposite direction from that state. At this time, the other end of the convex portion 10d and the other end of the concave portion 13a are set to contact each other.

  In other words, when the maximum number of pulses is applied to the motor 11 at the 0 ° base point of the motor 11 (the contact state of the convex portion 10d and the concave portion 13a), the drive gear 13 rotates by the maximum rotation angle (about 120 °). Is set to That is, the number of pulses described above corresponds to the energization time of the motor 11, and the state where the maximum number of pulses is applied is the state where the energization time is the longest.

  The driven gear 14 is set so that the meshing starts during the rotation of the drive gear 13 while the drive gear 13 rotates about 120 °, and the meshing is disengaged until the rotation of the drive gear 13 stops. . That is, the driven gear 14 is disengaged when the meshing with the drive gear 13 starts and rotates about 90 °, and the position (rotation angle) is maintained.

  By such an operation, the driven gear 14 starts to rotate and the baffle 3 starts to be opened. When the meshing is released, the baffle 3 is maintained in a fully opened state, and when the driving gear 13 is rotated or counter-rotated, the baffle 3 is started. 3 is set so that the baffle 3 is fully closed at the time when the clogging of 3 starts and the engagement is released.

  Further, the drive gear 13 continues to rotate at a predetermined angle from the time when the driven gear 14 is disengaged in forward rotation and reverse rotation.

  When a motor of a type that does not use a pulse power source is used to drive the motor 11, the drive gear 13 can be driven at the maximum rotation time in each of the forward and reverse directions by setting the energization time. it can.

  Next, a mechanism for opening and closing the baffle 3 will be described with reference to FIGS.

  As shown in FIGS. 7 and 8, the drive gear 13 includes a recess 13 a that regulates the rotation angle of the drive gear 13 described above, and a driven gear 14 that protrudes in the axial direction of the drive gear 13 and is only in the open / close operation of the baffle 3. It has the structure which has the gear part 13b which has four teeth | gears which mesh | engage, and the holding | maintenance part 13c formed over the perimeter except the gear part 13b.

  And the holding | maintenance part 13c is made into the same circular shape of the tooth tip circle diameter of the gear part 13b, or a slightly large diameter, and is formed so that the height in an axial direction may be lower than the gear part 13b. .

  The driven gear 14 is provided in the shaft portion 14a connected to the baffle 3, the fan-shaped gear portion 15 provided on the shaft portion 14a and having nine teeth and the holding portion 13c of the drive gear 13 in order to avoid interference. It has the structure which has two notch parts 15a and 15b which notched a part of gear part 15. FIG.

  The notches 15a and 15b are provided in a portion located between the teeth at both ends and a plurality of teeth at the center. In the present embodiment, the teeth at both ends excluding the three teeth at the center. And the axial height is set slightly higher than the holding portion 13c of the drive gear 13, and also in the radial direction, the diameter of the valley portion of the sector gear portion 15 is set. Has been.

  Of the two teeth provided with the notch 15a, the central tooth is an opening operation start tooth 15e that first meshes with the gear 13b when the drive gear 13 is rotated in the opening direction. Of the two teeth provided with the portion 15b, the central tooth is a closing operation start tooth 15f that first meshes with the gear portion 13b when the drive gear 13 is rotated in the closing direction.

  Of the nine teeth of the sector gear portion 15, in the closed state of the baffle 3, the teeth 15 c that are in contact with the holding portion 13 c of the drive gear 13 and hold the closed position of the driven gear 14, and in the open state of the baffle 3 The height in the axial direction of the tooth 15d that contacts the holding portion 13c of the driving gear 13 and holds the open position of the driven gear 14 is set to be substantially the same as the holding portion 13c of the driving gear 13.

  The motor 11, the pinion 12, the drive gear 13, and the driven gear 14 are arranged so that the meshing relationship is established as shown in FIGS. More specifically, the notched portions 15a and 15b of the driven gear 14 face the holding portion 13c of the drive gear 13 so as to be parallel in the axial direction, and the facing distance is the same as that of the gear portion 13b of the drive gear 13 and the driven portion. The engagement of the sector gear portion 15 of the gear 14 is possible, and when the engagement of the gear portion 13b and the sector gear portion 15 is disengaged, the holding portion 13c of the drive gear 13 faces the notches 15a and 15b and the notch portion. It is set so as to be in a relationship overlapping with the tooth portions left to form 15a and 15b.

  In other words, the number of teeth of the drive gear 13 and the driven gear 14 is set more in the driven gear 14 than in the drive gear 13 including the notches 15a and 15b. The facing distance between the notches 15a and 15b and the holding portion 13c of the drive gear 13 is close to the contact or not.

  In the present embodiment, a geared motor 11 that can rotate in the forward and reverse directions is used as a drive source. However, the motor 11 may be various motors that use DC or AC as a power source. However, it may be based on a mechanism that allows the drive gear 13 to rotate forward and backward.

  The operation of the damper device of the present embodiment configured as described above will be described below.

  First, when the motor 11 is rotated so that the baffle 3 rotates in the opening direction from the closed state and the driving gear 13 is rotated, the closed position in the holding portion 13c of the driving gear 13 and the sector gear portion 15 of the driven gear 14 is reached. While the teeth 15c that hold the gear 15 are in contact, that is, when the meshing is not performed, the driven gear 14 is maintained in the closed position, so that the baffle 3 maintains the closed state.

  When the drive gear 13 is further rotated, the contact between the holding portion 13c of the drive gear 13 and the teeth 15c holding the closed position of the driven gear 14 is released, and the opening operation of the gear portion 13b of the drive gear 13 and the driven gear 14 is started. When the teeth 15e come into contact with each other and the meshing of the drive gear 13 and the driven gear 14 starts, the driven gear 14 rotates, and the baffle 3 rotates in the opening direction as the shaft portion 14a rotates.

Here, the gear portion 13b of the drive gear 13 and the sector gear portion 15 of the driven gear 14 due to the inclination of the drive gear 13 and the driven gear 14 with respect to the axial direction due to rattling of the component fitting portion, the influence of warpage, sink marks, etc. during molding. Of the teeth of the sector gear portion 15 provided on the driven gear 14, the height of the teeth 15 c that hold the closed position is substantially the same as the height of the holding portion 13 c of the drive gear 13. Therefore, when the contact between the holding portion 13c of the driving gear 13 and the tooth 15c holding the closed state of the driven gear 14 is released, the tooth at the end of the gear portion 13b of the driving gear 13 and the closed position of the driven gear 14 are released. The teeth 15c that hold the gears do not interfere with each other, and the generation of noise and the rotation of the drive gear 13 are not hindered.

  When the rotation of the drive gear 13 is disengaged, the gear portion 13b and the sector gear portion 15 of the driven gear 14 are disengaged, the rotation of the driven gear 14 is stopped, and the baffle 3 is opened and further continued. Due to the rotation of the drive gear 13, the notch 15b of the driven gear 14 and the holding portion 13c of the drive gear 13 face each other, and the holding portion 13c of the drive gear 13 and the driven gear 14 do not interfere with each other.

  In the above state, the drive gear 13 continues to rotate, but the driven gear 14 does not rotate, and the open position is held among the teeth of the holding portion 13c of the drive gear 13 and the sector gear portion 15 provided on the driven gear 14. The contact position of the tooth 15d to be maintained keeps the open position of the driven gear 14, and as a result, the baffle 3 is kept open.

  Further, when the drive gear 13 rotates, the fan-shaped concave portion 13a provided on the drive gear 13 and the fan-shaped convex portion 10d provided on the side wall 10a of the case 10 contact or stop rotating at the position immediately before the contact. Then, the operation is terminated. That is, the maximum number of pulses is applied to the motor 11 at a position where the fan-shaped convex portion 10d and the concave portion 13a are in contact or just before contact.

  Next, when the motor 11 is rotated in the closing direction from the open state and the driving gear 13 is rotated in the reverse direction, the open position in the holding portion 13c of the driving gear 13 and the sector gear portion 15 of the driven gear 14 is held. While the teeth 15d are in contact, the driven gear 14 is kept in the open position, so that the baffle 3 is maintained in the open state.

  When the drive gear 13 is further rotated, the contact between the holding portion 13c of the drive gear 13 and the teeth 15d holding the open position of the driven gear 14 is released, and the gear portion 13b of the drive gear 13 and the driven gear 14 are released. When the tooth 15f for starting the closing operation is in contact with the fan-shaped gear portion 15 and the meshing of the drive gear 13 and the driven gear 14 starts, the driven gear 14 rotates in the reverse direction and the baffle 3 rotates in the closing direction.

  Here, the gear portion 13b of the drive gear 13 and the sector gear portion 15 of the driven gear 14 due to the inclination of the drive gear 13 and the driven gear 14 with respect to the axial direction due to rattling of the component fitting portion, the influence of warpage, sink marks, etc. during molding. Even if the inclination in the axial direction occurs, the height of the tooth 15d that holds the open position in the sector gear portion 15 of the driven gear 14 is substantially the same as the height of the holding portion 13c of the drive gear 13. When the contact between the holding portion 13c of the driving gear 13 and the tooth 15d holding the open position of the driven gear 14 is released, the tooth at the end of the gear portion 13b of the driving gear 13 and the tooth holding the closed position of the driven gear 14 are released. 15d does not interfere, and does not interfere with generation of abnormal noise or rotation of the drive gear 13.

  Further, when the rotation continues and the meshing of the gear portion 13b of the drive gear 13 and the sector gear portion 15 of the driven gear 14 is disengaged, the rotation of the driven gear 14 is stopped and the baffle 3 is closed.

  At this time, the engagement between the drive gear 13 and the driven gear 14 described above with the baffle 3 fully open is already secured between the shaft portion 14a of the driven gear 14 and the baffle 3 so that the baffle 3 is fully closed immediately before the engagement is released. By adjusting the connection in the rotational direction, the fully closed state of the baffle 3 can be maintained reliably.

Further, due to the continued rotation of the drive gear 13, the holding portion 13 c of the drive gear 13 and the driven gear 1.
4 is in a state in which the teeth 15c that hold the closed position in the sector gear portion 15 are in contact with each other and the notch portion 15a of the driven gear 14 faces each other, so that the holding portion 13c of the drive gear 13 and the driven gear 14 do not interfere with each other. It becomes.

  In the above state, the drive gear 13 continues to rotate in the opposite direction, but the driven gear 14 does not rotate, and the closed position in the holding portion 13c of the driving gear 13 and the sector gear portion 15 of the driven gear 14 is held. Due to the contact of the teeth 15c, the closed position of the driven gear 14 is maintained, and as a result, the baffle 3 is kept closed.

  Further, when the drive gear 13 rotates, the rotation of the drive gear 13 is stopped at the position immediately before the fan-shaped concave portion 13a provided on the drive gear 13 and the fan-shaped convex portion 10d provided on the case 10 come into contact or contact with each other. End the operation. That is, the maximum number of pulses for reverse rotation of the motor 11 is applied at a position just before the fan-shaped convex portion 10d and the concave portion 13a come into contact with each other.

  As described above, the height of the tooth 15c that holds the closed position and the height of the tooth 15d that holds the open position in the sector gear portion 15 of the driven gear 14 are substantially the same as the height of the holding portion 13c of the drive gear 13. Therefore, when the meshing of the drive gear 13 and the driven gear 14 is disengaged and the opening / closing operation is started, the interference between the gear portion 13b of the drive gear 13 and the fan-shaped gear portion 15 of the driven gear 14 can be prevented. There is no fear of occurrence, it is quiet and can be reliably opened and closed, and high reliability can be obtained.

  As an initialization operation for positioning the baffle 3, a pulse is applied to the motor 11 to temporarily rotate the motor 11 in the closing direction, and the fan-shaped concave portion 13 a of the drive gear 13 and the fan-shaped convex portion 10 d of the case 10 come into contact with each other. The drive gear 13 is rotated until the baffle 3 is fully closed. Then, the position is set as a reference position for closing, and thereafter, a predetermined pulse is applied in the opening direction (closing direction) to control the opening / closing operation.

  In addition, when the motor 11 is not a pulse type, it can be similarly controlled by energizing time to the motor.

  As described above, the damper device 1 according to the first embodiment includes the motor 11 that is a drive source capable of forward and reverse rotation, the drive gear 13 that transmits the rotation of the motor 11, and the driven gear 14 that is driven and rotated by the drive gear 13. The drive gear 13 is engaged with the driven gear 14 when the baffle 3 is operated from open to closed or closed to open, and the gear portion 13b is disengaged from the driven gear 14 in the closed state. A holding portion 13c is provided to hold the state where the driven gear 14 is disengaged in the closed state, and the holding portion 13c has a circular shape that is the same as or slightly larger than the tooth tip circle diameter of the gear portion 13b and has a high height. The driven gear 14 is provided with a fan-shaped gear portion 15 that meshes with the gear portion 13b of the drive gear 13, and the teeth of the fan-shaped gear portion 15 hold the drive gear 13 in the closed state. Part 3c and in contact, the height of the teeth 15c for holding the closed position of the driven gear 14 is to that almost the same height as the holding portion 13c.

  For this reason, the gear portion 13b of the drive gear 13 and the sector gear portion 15 of the driven gear 14 due to the inclination of the drive gear 13 and the driven gear 14 with respect to the axial direction due to rattling of the component fitting portion, and the influence of warpage or sink marks during molding. Even if the inclination in the axial direction occurs, it is possible to prevent the gear portion 13b of the drive gear 13 and the tooth 15c holding the closed position of the driven gear 14 from interfering during the opening operation, and no abnormal noise is generated during the opening operation. Quiet, reliable opening operation, can improve the reliability of temperature control.

Further, in the damper device 1 of the first embodiment, the gear portion 13b of the drive gear 13 is configured to be disengaged from the driven gear 14 even in the open state, and the holding portion 13c is in the open state of the driven gear 14. Of the teeth of the fan-shaped gear portion 15 of the driven gear 14 is in contact with the holding portion 13c of the drive gear 13 in the open state, and the height of the teeth 15d holding the open position of the driven gear 14 is The height is almost the same as the holding portion 13c.

  For this reason, the gear portion 13b of the drive gear 13 and the sector gear portion 15 of the driven gear 14 due to the inclination of the drive gear 13 and the driven gear 14 with respect to the axial direction due to rattling of the component fitting portion, and the influence of warpage or sink marks during molding. Even if the inclination in the axial direction occurs, it is possible to prevent the gear portion 13b of the driving gear 13 and the tooth 15d holding the open position of the driven gear 14 from interfering during the closing operation, and no abnormal noise is generated during the closing operation. It is quiet, can ensure the closing operation, and can improve the reliability of temperature control.

(Embodiment 2)
FIG. 9 is a schematic diagram showing the configuration of the article storage device according to Embodiment 2 of the present invention. Here, the damper device 1 is the damper device 1 of the first embodiment, and the same components as those of the first embodiment are denoted by the same reference numerals.

  In FIG. 9, the storage device main body 51 includes a first storage chamber 52a, a second storage chamber 52b, and a third storage chamber 52c that are open at the front and surrounded by a heat insulating material. A heat insulating first door 53a, a second door 53b, and a third door 53c that open and close the opening corresponding to the storage chamber 52a, the second storage chamber 52b, and the third storage chamber 52c are provided. The first storage chamber 52a and the second storage chamber 52b communicate with each other via a communication passage 54.

  Further, the storage device main body 51 is provided with a refrigeration cycle in which a compressor 55, a condenser 56, a decompression device 57, and an evaporator 58 are connected in a ring shape by piping, and the evaporator 58 is connected to the third storage chamber 52c. It arrange | positions in the cooling chamber 59 formed in the back surface.

  An air passage 60 for sending cold air to the second storage chamber 52b is provided in the upper portion of the cooling chamber 59. Further, in the cooling chamber 59, a blower 61 that actively circulates the cold air cooled by the evaporator 58 in the first storage chamber 52a, the second storage chamber 52b, and the third storage chamber 52c is provided. .

  Further, the air passage 60 is provided with a damper device 1 that controls the supply of cold air into the first storage chamber 52a. The damper device 1 detects at least the temperature in the first storage chamber 52a by a sensor 62, and opens / closes or opens the air passage 60 based on a signal from a control device (not shown) that receives the detected temperature. Adjust the degree.

  As a result, the supply of cold air by the blower 61 or the supply amount can be controlled, and the temperature in the first storage chamber 52a is controlled. The second storage chamber 52b is cooled by a part of the cold air flowing into the first storage chamber 52a that has flowed in through the communication passage 54.

  The opening / closing control of the damper device 1 may have a well-known configuration and is not directly related to the gist of the present invention, and thus a detailed description thereof is omitted.

  Furthermore, the damper device 1 is not limited to the first storage chamber 52a, but can be provided corresponding to the second storage chamber 52b and the third storage chamber 52c. It can also be controlled within a known range corresponding to each of the storage chamber 52a, the second storage chamber 52b, and the third storage chamber 52c.

Therefore, by adopting the damper device 1 having the configuration of the first embodiment, the opening and closing operation of the baffle 3 is ensured, air can be stably supplied and stopped to the storage space, stable temperature management, etc. And high reliability can be obtained.

  In the article storage device of the second embodiment, the cooling airflow is supplied to the first storage chamber 52a, the second storage chamber 52b, and the third storage chamber 52c. However, the temperature control chamber (cooling chamber 59) It is also possible to arrange a condenser 56 to supply the warm air flow to the first storage chamber 52a, the second storage chamber 52b, and the third storage chamber 52c, and to condense in the temperature control chamber (cooling chamber 59). 56 and an evaporator 58 are arranged to supply dehumidified air to the first storage chamber 52a, the second storage chamber 52b, and the third storage chamber 52c, and supply control of hot air or dehumidified dry air It can also be set as the goods storage apparatus provided with the function to perform.

  As described above, the damper device according to the present invention has a quiet opening / closing operation, has a high reliability of the opening / closing operation, and can improve the reliability of the temperature control. And can be widely applied to applications in which the fluid passage is opened and closed to control the supply of fluid.

DESCRIPTION OF SYMBOLS 1 Damper apparatus 2 Opening part 3 Baffle 4 Drive part 5 Frame 10 Case 11 Motor (drive source)
13 drive gear 13b gear part 13c holding part 14 driven gear 15 fan-shaped gear part 15c teeth holding the closed state 15d teeth holding the open state 51 storage device body (article storage device)
52a First storage room (article storage room)
52b Second storage room (article storage room)
52c Third storage room (article storage room)
55 Compressor 56 Condenser 57 Depressurizer 58 Evaporator 59 Cooling chamber (temperature control chamber)
60 Airway 61 Blower

Claims (3)

In a damper device comprising a frame having an opening, a baffle that opens and closes the opening, and a drive unit that drives the baffle, the drive unit includes a case that forms an outer shell, and a drive source that can rotate forward and backward And a drive gear capable of transmitting the rotation of the drive source, and a driven gear driven to rotate by the drive gear, and when the baffle is operated from open to closed or from closed to open on the drive gear, A gear portion that meshes with the driven gear and disengages from the driven gear when in the closed state; and a holding portion that holds the state where the driven gear disengages when in the closed state. Is a fan-shaped gear portion that has a circular shape that is the same as or slightly larger than the tooth tip circle diameter of the gear portion, has a height lower than the height of the gear portion, and engages the driven gear with the gear portion of the drive gear. A damper device provided with a tooth height of the teeth of the fan-shaped gear portion that is in contact with the holding portion of the drive gear when in the closed state and holds the closed position of the driven gear is substantially the same as the holding portion. . The gear portion of the drive gear is configured to be disengaged from the driven gear even in the open state, and the holding portion is configured to hold the open state of the driven gear, and the sector gear portion of the driven gear. The damper device according to claim 1, wherein a height of a tooth that contacts the holding portion of the drive gear and maintains the open position of the driven gear is substantially the same as that of the holding portion in the open state. . An article storage chamber formed by an insulated space, a refrigeration cycle in which a compressor, a condenser, a decompression device, and an evaporator are connected in an annular shape through a pipe, and a temperature-controlled airflow by the evaporator or the condenser is stored in the article In the storage device comprising the blowing means for sending into the room, the blowing means has one end opened to the temperature control chamber in which the condenser or the evaporator is disposed, and the other end opened to the article storage chamber, The article storage which made it the structure which comprises the air blower provided in the said temperature control room or the said air blow circuit, and the damper apparatus provided in the said air blow circuit, and made the said damper device the damper apparatus of Claim 1 or 2 apparatus.