JP6636780B2 - Opening / closing member driving device and opening / closing member driving device unit - Google Patents

Description

  The present invention relates to an opening / closing member driving device for driving an opening / closing member such as a lid or a door, and an opening / closing member driving unit.

  An opening / closing member driving device that opens and closes an opening / closing member such as a lid or a door is described in Patent Document 1. The opening / closing member drive mechanism of the document closes the lid of the rice cooker in an open state, and includes a motor and a transmission mechanism for transmitting the driving force of the motor to the lid.

Japanese Patent No. 3077622

  Opening and closing members such as lids and doors may be operated by humans. For example, when the opening / closing member is driven in the closing direction by the opening / closing member driving device, the opening / closing member is operated in the closing direction by a person, and the opening / closing member moves in the closing direction at a speed higher than the moving speed by the opening / closing member driving device. To reach the closed position. Similarly, when the opening / closing member is driven in the opening direction, the opening / closing member is operated in the opening direction by a person, and the opening / closing member moves in the opening direction at a speed higher than the moving speed by the opening / closing member driving device, and the open position. May be reached.

  Here, when the opening / closing member is being driven, the driving force of the motor is transmitted to the opening / closing member via the transmission mechanism. Therefore, when the driven opening / closing member is moved in the driving direction, there is a problem that the motor and the transmission mechanism become loads, and a person who operates the opening / closing member cannot move the opening / closing member with a small force.

  In view of the foregoing, an object of the present invention is to provide an opening / closing member driving device and an opening / closing member driving device unit that can move the opening / closing member in a driving direction with a small force when the opening / closing member is driven. It is in.

In order to solve the above problem, an opening / closing member driving device of the present invention has a transmission mechanism that transmits a driving force of a motor to an output shaft to which an opening / closing member is connected, and the transmission mechanism has a driving force of the motor. A transmission gear to be transmitted, and a rotating member positioned downstream of the transmission gear in the driving force transmission direction, wherein the rotating member moves the abutted portion at a position radially separated from a rotation center line thereof. The transmission gear includes a contact portion that contacts the contacted portion from behind in the first rotation direction to rotate the rotating member when the transmission gear rotates in the first rotation direction , The transmission gear is a sector gear, the rotating member includes an arm extending in the radial direction, the abutted portion is provided on the arm, and the arm includes the rotation center line. An extending portion extending in a direction intersecting with the A projection protruding toward the side of the shaped gear, wherein the sector gear has a second end opposite to the first rotation direction from a front end face in the first rotation direction on a sector end face facing the arm portion. A groove extending in a rotation direction, wherein the groove has an arc shape centered on the rotation center line, and the protrusion is inserted into the groove so as to be movable in a circumferential direction. An inner wall surface defining an end in the second rotation direction is the contact portion .

According to the present invention, the rotating member does not rotate while meshing with the transmission gear, but rotates with the transmission gear when the contact portion of the transmission gear contacts the contacted portion of the rotating member. The contact portion of the transmission gear contacts the contacted portion of the rotating member from the rear in the first rotation direction. Therefore, for example, in order to drive the opening / closing member in the closing direction, when the transmission gear rotates in the first rotation direction by driving of the motor, and the rotation member rotates in the first rotation direction, When operated in the closing direction, only the rotating member connected to the opening / closing member rotates in the first rotation direction, and the abutted portion of the rotating member moves from the abutting portion of the transmission gear for the first rotation. Separate forward in the direction. Therefore, when the opening / closing member is driven in one of the opening direction and the closing direction, when the opening / closing member is moved in the driving direction, a mechanism such as a gear positioned upstream of the rotating member in the driving force transmission direction in the transmission mechanism. No part or motor acts as a load. For example, in order to drive the opening / closing member in the closing direction, the transmission gear is rotated in the first rotation direction by the driving of the motor, and when the rotating member is rotating in the first rotation direction, the opening / closing member is operated by a person. When it is moved in the closing direction, only the output shaft and the rotating member rotate in the first rotating direction, and the abutted portion of the rotating member separates forward from the abutting portion of the transmission gear in the first rotating direction. I do. Therefore, when the opening / closing member is moved in the driving direction (closing direction), the mechanism portion or the motor located upstream of the rotating member in the driving force transmission direction in the transmission mechanism does not act as a load. Therefore, the driven opening / closing member can be moved in the driving direction by a weak force by a person. Similarly, when the opening / closing member is driven in the opening direction, when the opening / closing member is operated by a person and moves in the opening direction, a mechanism portion of the transmission mechanism that is located upstream of the rotating member in the driving force transmission direction, The motor does not act as a load. Further, if the transmission gear is a sector gear, the space occupied by the transmission gear can be suppressed as compared with the case where the transmission gear is a circular gear. Therefore, it is easy to reduce the size of the device. Further, by inserting the protrusion of the arm portion into the groove, it is possible to prevent or suppress the protrusion from protruding forward from the front end edge of the sector gear in the first rotation direction. Therefore, it is easy to reduce the size of the device in the rotation direction of the transmission gear. Further, with this configuration, when the opening / closing member is moved in the driving direction by a person, the rotation of the rotating member can be guided by the groove.

  In the present invention, in order to rotate the rotating member and the transmission gear, it is preferable that the rotating member is coaxial with the transmission gear.

  In the present invention, it is preferable that the rotating member is rotatably supported by the transmission gear. This makes it easy to arrange the transmission gear and the rotating member coaxially.

In the present invention, it is preferable that the transmission gear is a final gear of the transmission mechanism, and the rotating member is fixed to the output shaft. With this configuration, since there is no intervening wheel train transmitting driving force between the rotating member and the opening / closing member, such a wheel train acts as a load when the opening / closing member is moved by human power. There is no. Therefore, the opening and closing member can be moved in the driving direction with a small force.

  In the present invention, it is preferable that the transmission mechanism includes a reduction gear train. With this configuration, the opening / closing member can be moved at a desired speed.

  In the present invention, the transmission mechanism includes a torque limiter. This can prevent the transmission mechanism and the motor from being damaged when the opening / closing member is operated in the direction opposite to the driving direction.

  Next, the opening / closing member driving device unit of the present invention includes the opening / closing member driving device described above, a detector that detects that the opening / closing member is disposed at the closed position, and a control unit that controls driving of the motor. Wherein the transmission gear rotates between a first angular position and a second angular position located forward of the first angular position in the first rotation direction, and the control unit corrects the motor. The opening / closing member is moved toward the closed position by driving the transmission gear in the first rotation direction by driving the transmission gear in the first rotation direction, and the opening / closing by the detector when the motor is driven in the forward direction. When it is detected that the member is located at the closed position, the motor is driven in the reverse direction to return the transmission gear to the first angular position.

  According to the present invention, the opening / closing member driven in the closing direction can be moved in the closing direction by a weak force by a person. Further, the control unit drives the motor in the reverse direction to rotate the transmission gear when the opening / closing member is disposed in the closed position while driving the motor in the forward direction to rotate the transmission gear in the first rotation direction. Return to the first angular position. This prevents the rotation of the rotating member connected to the opening / closing member from being transmitted to the transmission gear when the opening / closing member arranged at the closed position is moved in the opening direction by a person. Therefore, the opening / closing member arranged at the closed position can be moved in the opening direction by a weak force by a person.

  According to the present invention, when the opening / closing member is moved in the driving direction by a person, a part of the transmission mechanism or the motor does not act as a load. Therefore, the driven opening / closing member can be moved in the driving direction with a small force.

It is explanatory drawing of the automatic closing apparatus to which this invention is applied. It is a perspective view of the automatic closing device in the state where a part of case was removed. It is an exploded perspective view of the automatic closing device of FIG. It is an exploded perspective view of the automatic closing device of FIG. It is explanatory drawing of a 2nd compound gear. It is an external appearance perspective view of a 4th compound gear. It is an exploded perspective view of the 4th compound gear. It is an exploded perspective view of the 4th compound gear. It is sectional drawing of a 4th compound gear. FIG. 3 is a perspective view of an output gear and peripheral portions of an output shaft. It is explanatory drawing of operation | movement of an output gear and an output shaft. It is explanatory drawing of operation | movement of an output gear and an output shaft when an opening / closing member is operated. It is a flowchart of the closing operation | movement of an opening / closing member. It is a perspective view of an output gear of a reference example , and a peripheral portion of an output shaft. It is explanatory drawing of operation | movement of an output gear and an output shaft of a reference example . It is explanatory drawing of operation | movement of the output gear and output shaft of a reference example when an opening / closing member is operated.

  Hereinafter, an automatic closing device and an automatic closing device unit according to an embodiment of the opening and closing member driving device and the opening and closing member driving device unit of the present invention will be described with reference to the drawings.

(overall structure)
1A is an external perspective view of the automatic closing device, and FIG. 1B is an explanatory diagram illustrating a state in which an opening / closing member is connected to an automatic closing device or an automatic closing device unit. FIG. 2 is a perspective view of the automatic closing device with a part of the case removed. The automatic closing device 1 rotates an opening / closing member 2 such as a lid or a door which is in an open state, and arranges the opening / closing member 2 at a closed position 2 </ b> A which comes into contact with the box 3. Thereby, the storage section provided in the box 3 is closed by the lid or the door. As shown in FIG. 1A, the automatic closing device 1 constitutes an automatic closing device unit 7 together with the control unit 4, the switch 5 and the detector 6. As shown in FIG. 1B, the opening / closing member 2 extends over a 90 ° angle range between a closed position 2 </ b> A lying down along the box 3 and an open position 2 </ b> B standing up on the box 3. Rotate in both directions. In addition, the position and angle range of the closed position 2A and the open position 2B of the opening / closing member 2 are not limited to the embodiment, but are set according to the application.

  The automatic closing device 1 includes a case 10 and an output shaft 11 to which the opening / closing member 2 is connected. The connection portion 12 of the output shaft 11 with the opening / closing member 2 is exposed outside from the bearing hole 13 of the case 10. The opening / closing member 2 has its rotation center axis coaxially connected to the output shaft 11. In the following description, the rotation center line of the output shaft 11 is defined as L0, and the direction along the rotation center line L0 in the automatic closing device 1 is defined as the X direction. One side in the X direction is defined as a first direction X1, and the opposite side to the first direction X1 is defined as a second direction X2.

  As shown in FIG. 1A, the case 10 includes a first case 15, an intermediate case 16, and a second case 17 arranged along the X direction. The first case 15 is located in the first direction X1 of the intermediate case 16, and the second case 17 is located in the second direction X2 of the intermediate case 16. In FIG. 2, the second case 17 has been removed from the automatic closing device 1.

FIG. 3 is an exploded perspective view when the automatic closing device 1 is viewed from the side in the second direction X2 toward the first direction X1. FIG. 4 is an exploded perspective view when the automatic closing device 1 is viewed from the side in the first direction X1 in the second direction X2. As shown in FIGS. 3 and 4, the case 10 includes a motor 20 serving as a drive source of the automatic closing device 1, an output shaft 11 to which the opening / closing member 2 is connected, and a driving force of the motor 20 transmitted to the output shaft 11. A gear mechanism (transmission mechanism) 21 and a potentiometer 28 are housed. The gear mechanism 21 is a reduction wheel train .

  As shown in FIG. 3, the motor 20 is arranged in the case 10 in a posture in which the motor output shaft 20a projects in the second direction X2. The gear mechanism 21 includes a pinion 22 attached to the motor output shaft 20a, a first compound gear 23 meshing with the pinion 22, a second compound gear (torque limiter) 24 meshing with the first compound gear 23, and a second compound gear (torque limiter) 24. A third compound gear 25 that meshes with the compound gear 24, a fourth compound gear 26 that meshes with the third compound gear 25, and an output gear 27 that is a transmission gear that meshes with the fourth compound gear 26.

  In the motor 20, the motor body 20b is housed between the first case 15 and the intermediate case 16. The motor output shaft 20a projects between the intermediate case 16 and the second case 17 through a first opening 16a (see FIG. 4) formed in the intermediate case 16, as shown in FIG. The pinion 22 is fixed to the motor output shaft 20a and housed between the intermediate case 16 and the second case 17.

  As shown in FIG. 3, the first compound gear 23 includes a first large-diameter gear portion 23a that meshes with the pinion 22 and a first large-diameter gear portion 23a provided coaxially on the first direction X1 side. The small gear portion 23b is provided. The second compound gear 24 includes a second large-diameter gear portion 24a meshed with the first small-diameter gear portion 23b, and a second small-diameter gear portion provided coaxially on the side of the second large-diameter gear portion 24a in the first direction X1. 24b. The third compound gear 25 includes a third large-diameter gear portion 25a meshing with the second small-diameter gear portion 24b, and a third small-diameter gear portion provided coaxially on the first direction X1 side of the third large-diameter gear portion 25a. 25b. The fourth compound gear 26 includes a fourth large-diameter gear portion 26a that meshes with the third small-diameter gear portion 25b, and a fourth small-diameter gear portion provided coaxially on the side of the fourth large-diameter gear portion 26a in the second direction X2. 26b. The output gear 27 meshes with the fourth small-diameter gear portion 26b.

  The first compound gear 23 is rotatably supported by a first support shaft 31 extending in the X direction. The first support shaft 31 extends in the X direction through a second opening 16b formed in the intermediate case 16. An end portion of the first support shaft 31 in the first direction X1 is supported by a first case-side first support portion 32 provided in the first case 15. An end portion of the first support shaft 31 in the second direction X <b> 2 is supported by the second case 17 -side first support portion 33 provided in the second case 17. Here, as shown in FIG. 2, in the first compound gear 23, the first large-diameter gear portion 23 a is arranged between the intermediate case 16 and the second case 17 and meshes with the pinion 22. In the first compound gear 23, the first small-diameter gear portion 23b projects between the first case 15 and the intermediate case 16 through the second opening 16b, and meshes with the second compound gear 24.

  The second compound gear 24 is rotatably supported by a second support shaft 34 extending in the X direction. An end portion of the second support shaft 34 in the first direction X1 is supported by a first case-side second support portion 35 provided in the first case 15. An end portion of the first support shaft 31 in the second direction X <b> 2 is supported by the intermediate case-side first support portion 36 provided in the intermediate case 16. The third compound gear 25 is rotatably supported by a third support shaft 37 extending in the X direction. An end portion of the third support shaft 37 in the first direction X <b> 1 is supported by a first case-side third support portion 38 provided in the first case 15. An end portion of the third support shaft 37 in the second direction X2 is supported by an intermediate case-side second support portion 39 provided in the intermediate case 16. The fourth compound gear 26 is rotatably supported by a fourth support shaft 40 extending in the X direction. An end portion of the fourth support shaft 40 in the first direction X1 is supported by the first case-side fourth support portion 41 provided on the first case 15. An end portion of the fourth support shaft 40 in the second direction X2 is supported by an intermediate case-side third support portion 42 provided on the intermediate case 16.

  The output gear 27 is a sector gear. The output gear 27 and the output shaft 11 are arranged coaxially. That is, the rotation center line L0 of the output shaft 11 and the output gear 27 coincides with each other. A bearing hole 43 penetrating in the X direction is provided at the pivot (center of rotation) of the output gear 27 (sector gear).

  As shown in FIG. 4, the output shaft 11 integrally includes an output shaft main body 45 extending in the X direction along the rotation center line L0, and an arm 46 that is a rotating member that rotates around the rotation center line L0. With this configuration, the output gear 27 and the arm 46 as a rotating member are coaxially arranged. The output shaft main body 45 is provided with a connecting portion 12 for connecting the opening / closing member 2. The arm 46 rotates in a range interlocked with the positions of the opening position 2B and the closing position 2A of the opening / closing member 2 and the angle range. In this embodiment, since the arm 46 is fixed to the output shaft 11, the arm 46 rotates in the same range as the angle range of the opening / closing member 2. Therefore, it is easy to reduce the size of the device. The connecting portion 12 is a through hole that penetrates the output shaft main body portion 45 in the X direction. When the connecting portion 12 (through hole) is viewed from the X direction, the opening shape is a D-shape. The arm 46 extends in a radial direction orthogonal to the rotation center line L0.

The output shaft 11 has its output shaft main body 45 rotatably supported in a bearing hole 43 of the output gear 27. The output shaft 11 has an output shaft main body 45 rotatably supported by the first case 15 and the intermediate case 16. That is, the end portion of the output shaft main body 45 in the first direction X1 is the first direction.
The output shaft body 45 is rotatably supported by a bearing hole 13 provided in the intermediate case 16, and an end portion of the output shaft main body 45 in the second direction X2 is rotatably supported by a bearing hole 47 provided in the case 15. Therefore, the output gear 27 is rotatably supported by the output shaft main body 45 of the output shaft 11 rotatably supported by the first case 15 and the intermediate case 16.

  Potentiometer 28 is arranged between intermediate case 16 and second case 17. The potentiometer 48 of the potentiometer 28 meshes with the fourth small-diameter gear portion 26b of the fourth compound gear 26. More specifically, the potentiometer 48 is housed in a recess 49 (see FIG. 3) provided on the surface of the intermediate case 16 on the side in the second direction X2. An opening 50 is formed on the side surface of the recess 49, and the potentiometer 48 meshes with the fourth small-diameter gear portion 26 b via the opening 50.

(2nd compound gear)
The second compound gear 24 will be described in detail with reference to FIG. FIG. 5A is a perspective view of the second compound gear 24, FIG. 5B is an exploded perspective view of the second compound gear 24, and FIG. FIG. 4 is a cross-sectional view cut along a plane orthogonal to an axis 34. The second compound gear 24 includes an input-side gear member 55 and an output-side gear member 56 rotatably supported by the second support shaft 34, a coil spring 57, and four metal shafts 58. The input side gear member 55 is located upstream of the output side gear member 56 in the driving force transmission direction. That is, the input side gear member 55 is arranged on the input side of the driving force, and the output side gear member 56 is arranged on the output side of the driving force. The metal shaft 58 has a cylindrical shape.

  As shown in FIG. 5B, the input-side gear member 55 includes a bottom portion 60, a cylindrical portion 61 extending from the outer peripheral edge of the bottom portion 60 in the first direction X <b> 1, and a tooth portion provided on the outer peripheral surface of the cylindrical portion 61. 62 and four arc-shaped walls 63 extending from the bottom 60 to the inside of the cylindrical portion 61 in the X direction. The cylindrical portion 61 forms the second large-diameter gear portion 24a. A shaft hole 64 (see FIG. 5C) through which the second support shaft 34 penetrates is provided at the center of the bottom portion 60.

  The height of the four arc walls 63 from the bottom 60 is slightly shorter than the height of the cylinder 61. Each arc wall 63 extends in the circumferential direction along an imaginary circle coaxial with the cylindrical portion 61. The four arc walls 63 are arranged at equal angular intervals, and a gap extending in the X direction is formed between adjacent arc walls 63. The metal shaft 58 is inserted into each of the gaps (four gaps). The diameter of the metal shaft 58 is longer than the thickness dimension of each arc wall 63. A coil spring 57 is inserted into an annular space formed between the cylindrical portion 61 and the four arc walls 63.

  The output-side gear member 56 is inserted into the inside of the cylindrical portion 61 and has a disk portion 66 that comes into contact with the tip surfaces (end surfaces in the first direction X1) of the four arc walls 63, and four arc walls from the disk portion 66. An insertion portion 67 protruding toward the side 63 and inserted into the inner peripheral side of the four arc walls 63, and a gear portion 68 protruding from the disk portion 66 in a direction opposite to the insertion portion 67. The gear portion 68 forms the second small-diameter gear portion 24b.

  The insertion portion 67 has a cylindrical shape that is rotatably fitted inside the four arc walls 63. Grooves 69 extending in the X direction are provided at four locations at equal angular intervals on the annular outer peripheral surface of the insertion portion 67. A shaft hole 70 through which the second support shaft 34 penetrates is provided at the center of the output side gear member 56.

The second compound gear 24 is configured by combining an input side gear member 55 and an output side gear member 56 from the X direction. When combining the input-side gear member 55 and the output-side gear member 56, the metal shaft 58 is inserted into each gap between the four arc-shaped walls 63 of the input-side gear member 55, and the outer peripheral side of the four arc-shaped walls 63. , A coil spring 57 is arranged. Thereafter, each of the four grooves 69 of the insertion portion 67 of the output-side gear member 56 is positioned at an angular position facing the space between the four arc-shaped walls 63 of the input-side gear member 55, and then the output is performed. The insertion portion 67 and the disk portion 66 of the side gear member 56 are inserted into the cylindrical portion 61 of the input side gear member 55. As a result, each of the four metal shafts 58 has a part on the inner peripheral side fitted into each groove 69 of the insertion portion 67 of the output-side gear member 56. Further, the coil springs 57 located on the outer peripheral side of the four arc walls 63 exert an urging force for urging the respective metal shafts 58 toward the inner peripheral side.

  Here, when the automatic closing device 1 moves the opening / closing member 2 in the closing direction C, the second compound gear 24 causes each of the four metal shafts 58 to be connected to each of the insertion portions 67 by the urging force of the coil spring 57. It is maintained in a state fitted in the groove 69. Therefore, the input side gear member 55 and the output side gear member 56 rotate integrally.

  On the other hand, when an excessive force is input to the gear mechanism 21 from the output shaft 11 side, the input side gear member 55 and the output side gear member 56 are relatively rotated by this force. That is, when an excessive force is input to the gear mechanism 21 from the output shaft 11 side, a force is generated in which the angular positions of the output gear member 56 and the input gear member 55 deviate from the aligned angular positions. Accordingly, the position of the groove 69 of the insertion portion 67 of the output-side gear member 56 is shifted in the circumferential direction with respect to the space between the four arc-shaped walls 63 of the input-side gear member 55, so that the metal shaft 58 is It moves to the outer peripheral side of the insertion portion 67 against the urging force. As a result, the metal shaft 58 comes off the groove 69, and the relative rotation between the output gear member 56 and the input gear member 55 is allowed. Therefore, the excessive force input from the output shaft 11 is attenuated by the second compound gear 24, and the excessive force is not transmitted to the upstream side (motor 20 side) in the driving force transmission direction. Thus, the second compound gear 24 is a torque limiter.

(4th compound gear)
The fourth compound gear 26 will be described in detail with reference to FIGS. FIG. 6 is a perspective view of the fourth compound gear 26. FIG. 6 is an exploded perspective view when the fourth compound gear 26 is viewed from the side in the second direction X2 in the first direction X1. FIG. 7 is an exploded perspective view when the fourth compound gear 26 is viewed from the second direction X2 side in the first direction X1. FIG. 8 is an exploded perspective view of the fourth compound gear 26 viewed from the first direction X1 in the second direction X2. FIG. 9 is a sectional view of the compound gear cut along a plane orthogonal to the fourth support shaft 40. In FIG. 9, the coil spring 73 is omitted. The fourth compound gear 26 rotates in the first rotation direction R1 (CCW direction in FIG. 9) when the automatic closing device 1 drives the opening / closing member 2 toward the closing position 2A.

  As shown in FIG. 6, the fourth compound gear 26 includes a first rotating member 71 and a second rotating member 72 rotatably supported by the fourth support shaft 40. Further, as shown in FIGS. 7 and 8, the fourth compound gear 26 is connected to the first rotating member 71 and the second rotating member 72 to transmit the rotation of the first rotating member 71 to the second member. Is provided. The first rotating member 71 is located on the upstream side (motor 20 side) of the driving force transmission direction with respect to the second rotating member 72. The elastic member is a coil spring 73.

  As shown in FIG. 7, the first rotating member 71 includes a bottom portion 75, a tube portion 76 extending from the outer peripheral edge of the bottom portion 75 in the second direction X2 (the direction of the rotation center line L2 of the fourth compound gear 26), A tooth portion 77 provided on the outer peripheral surface of the portion 76 and a column portion 78 extending coaxially with the cylindrical portion 76 from the bottom portion 75 inside the cylindrical portion 76 are provided. The tooth portion 77 forms the fourth large-diameter gear portion 26a. The height of the column 78 from the bottom 75 is slightly shorter than the height of the cylinder 76. Specifically, the height of the column 78 from the bottom 75 is shorter than the height of the cylinder 76 by the thickness of the disk member 89 of the first rotating member 71 described later. A recess 79 is formed in the tip end surface of the column 78. As shown in FIG. 8, a shaft hole 80 through which the fourth support shaft 40 passes is provided at the center of the bottom 75. A first connection hole 81 for connecting the coil spring 73 is provided in an annular portion of the bottom 75 between the column 78 and the cylinder 76.

  As shown in FIG. 7 and FIG. 9A, when the column portion 78 is viewed from the second direction X2, the opening shape of the concave portion 79 includes a circular opening portion 84 which is a circle centered on the rotation center line L2, A first fan-shaped opening 85 extending from the outer peripheral edge of the circular portion to the outer peripheral side in a first angle range on one side of the rotation center line L2 of the fourth compound gear 26 and the rotation center line L2. On the other side, a second fan-shaped opening 86 extending from the outer peripheral edge of the circular portion to the outer peripheral side in a second angular range is provided. The second angle range is larger than the first angle range. The front inner wall surface defining the front end of the first fan-shaped opening 85 in the first rotation direction R1 in the concave portion 79 is a contacted portion 79a with which a contact portion of a second rotating member 72 described later contacts. The rear inner wall surface defining the rear end of the first fan-shaped opening 85 in the first rotation direction R1 in the recess 79 defines a rotation angle range in which the second rotation member 72 and the first rotation member 71 relatively rotate. The rotation angle range defining unit 79b.

  As shown in FIG. 6, the second rotating member 72 is provided on the disk member 89, which is inserted inside the cylindrical portion 76 of the first rotating member 71 and abuts on the tip end surface of the column 78, and the disk member 89. A gear member 91 is provided which extends through the mounting hole 90 in the X direction. The gear member 91 includes an insertion portion 92 protruding from the disc member 89 toward the column portion 78 and inserted into the recess 79, a gear portion 93 protruding from the disc member 89 in the opposite direction to the insertion portion 92, and an insertion portion 92. And a mounting portion 94 that fits into the mounting hole 90 between the gear portion 93 and the gear portion 93. The gear portion 93 forms the fourth small-diameter gear portion 26b. At the center of the second rotating member 72, a shaft hole 72a through which the fourth support shaft 40 passes is provided. A second connection hole 95 for connecting the coil spring 73 is provided at a position off the rotation center axis L2 in the disk member 89.

  As shown in FIG. 9B, the cross-sectional shape of the insertion portion 92 cut along a plane orthogonal to the X direction is an annular portion 96 coaxial with the rotation center axis L2 and one side sandwiching the rotation center line L2 therebetween. A first protruding portion 97 protruding from the outer peripheral edge of the annular portion 96 to the outer peripheral side, and a second protruding portion 98 protruding outward from the outer peripheral edge of the annular portion 96 on the other side with the rotation center line L2 interposed therebetween. Prepare. The second protrusion 98 is wider than the first protrusion 97. Here, the front side wall surface of the insertion portion 92 that defines the front end of the first protrusion 97 in the first rotation direction R1 abuts on the abutted portion 79a (the front inner wall surface of the recess 79) of the first rotation member 71. The contact portion 92a is a contactable portion 92a. The rear wall surface of the insertion portion 92 that defines the rear end of the first protrusion 97 in the first rotation direction R1 is located on the rotation angle range defining portion 79b (the rear inner wall surface of the recess 79) of the first rotation member 71. The second contact portion 92b is a contactable second contact portion 92b.

  As shown in FIGS. 7 and 8, the coil spring 73 includes a winding portion 100, a first connection portion 101 that extends from the end of the winding portion 100 in the first direction X1 and extends in the first direction X1. The second connecting portion 102 is provided to bend from an end of the portion 100 in the second direction X2 and extend in the second direction X2. The first connection part 101 is inserted into the first connection hole 81 of the bottom part 75 of the first rotating member 71 and is fixed to the first rotating member 71. The first connection portion 101 is inserted into the second connection hole 95 of the disk member 89 of the second rotation member 72 and is fixed to the second rotation member 72.

  The fourth compound gear 26 is configured by combining a first rotating member 71 and a second rotating member 72 from the X direction. When the first rotating member 71 and the second rotating member 72 are combined, first, a coil spring 73 is arranged on the outer peripheral side of the column portion 78 of the first rotating member 71, and the first connecting portion 101 is connected to the first connecting hole. Insert into 81. Next, the disk member 89 of the second rotating member 72 is inserted into the cylindrical portion 76 of the first rotating member 71, and the second connecting portion 102 of the coil spring 73 is inserted into the second connecting hole 95. Thereafter, the gear member 91 is inserted into the mounting hole 90 of the disk member 89, the mounting portion 94 is fitted into the mounting hole 90, and the insertion portion 92 of the gear member 91 is inserted into the recess 79 of the column 78 of the first rotating member 71. Insert

Here, when inserting the insertion portion 92 of the gear member 91 into the concave portion 79 of the column portion 78 of the first rotation member 71, the gear member 91 is twisted in the second rotation direction R2 opposite to the first rotation direction R1. While inserting. Accordingly, when the insertion portion 92 is inserted into the recess 79, the contact portion 92 a of the insertion portion 92 is moved in the first rotation direction R <b> 1 by the urging force (restoring force) of the coil spring 73. Is pressed from behind and comes into contact. That is, the coil spring 73 is stored in a state where elastic energy is accumulated by torsion and has a restoring force in the first rotation direction R1. As a result, the coil spring 73 exerts an urging force for bringing the contact portion 92a into contact with the contacted portion 79a.

  The disk member 89 and the gear member 91 can be formed integrally in the second rotating member 72. However, in this example, since the disc member 89 and the gear member 91 are separate members, the insertion portion 92 is twisted while the coil spring 73 is connected to both the first rotating member 71 and the second rotating member 72. Can be easily inserted into the recess 79. In the present example, the first protrusion 97 and the second protrusion 98 have different shapes in the insertion portion 92 of the first rotating member 71, and the mounting hole 90 has a shape corresponding to the insertion portion 92. Therefore, when attaching the gear member 91 to the disk member 89, the gear member 91 is not attached in a posture rotated by 180 °.

  When the opening / closing member 2 moves in the closing direction C by driving the motor 20, that is, when the fourth compound gear 26 rotates in the first rotation direction R1 by the driving force of the motor 20, the urging force of the coil spring 73 is applied. As a result, the abutted portion 79a of the first rotating member 71 and the abutting portion 92a of the second rotating member 72 are maintained in contact with each other. Therefore, the first rotating member 71 and the second rotating member 72 rotate integrally in the state shown in FIG.

  On the other hand, when the motor 20 is operating when the opening / closing member 2 is in contact with the box 3 at the closed position 2A and the output gear 27 is stopped, the first rotating member 71 is pressed against the urging force by the first rotating member 71. By rotating in the rotation direction R1, the contacted portion 79a and the contact portion 92a are separated. FIG. 9B shows a state in which the first rotating member 71 has rotated in the first rotation direction R1 against the urging force. Therefore, the fourth compound gear 26 rotates the first rotating member 71 after the output gear 27 has fallen into the locked state, thereby allowing the upstream transmission mechanism to transmit the driving force of the motor 20 by the upstream transmission mechanism.

  Here, after the output gear 27 has fallen into the locked state, the fourth compound gear 26 allows the rotation of the first rotating member 71 for a predetermined period. The predetermined period is defined as the time when the abutted portion 79a of the first rotating member 71 and the abutting portion 92a of the second rotating member 72 are separated from each other, and the second abutting portion 92b of the second rotating member 72 and the first This is a period until the rotation member 71 comes into contact with the rotation angle range defining portion 79b.

  As described above, when the motor 20 is operating when the output gear 27 is stopped, the fourth compound gear 26 transmits the transmission mechanism portion (the pinion 22 and the second compound gear) from the motor 20 to the fourth compound gear 26. 24 and the third compound gear 25) function as a driving force release mechanism that allows the driving force of the motor 20 to be transmitted. In this example, since the gear mechanism 21 includes the driving force releasing mechanism (the fourth compound gear 26), when the opening / closing member 2 abuts on the box 3 at the closed position 2A, the entire gear mechanism 21 is immediately locked. Can be prevented.

That is, in the present embodiment, the driving force relief mechanism (fourth compound gear 26) that operates as a torque limiter that reduces the transmission torque by idling at a predetermined torque or more is arranged in the gear train of the gear mechanism 21. When the motor 20 is operated so that the opening / closing member 2 is securely brought into contact with the box body 3 in the closed position 2A, the failure such as the seizure of the motor 20 and the damage or deformation of the gear train of the gear mechanism 21 are prevented. it can. Here, in a case where a sealing part made of a packing or another elastic body is provided at a portion where the opening / closing member 2 and the box 3 come into contact with each other, the opening / closing member 2 is surely brought into contact with the box 3 at the closed position 2A. When the motor 20 is operated, a large force is applied to the gear mechanism 21 as compared with a case where no seal component is provided. In such a case, the driving force releasing mechanism (the fourth compound gear 2)
Arranging 6) in the gear train of the gear mechanism 21 is effective for preventing failure of the motor 20 and the gear mechanism 21. Further, the repulsive force of the sealing member made of an elastic body and the repulsive force due to the accumulation of elastic energy of the urging member for driving the openable member 2 from the side of the closed position 2A to the open position 2B from the closed position 2A described later are in the closed position. It becomes larger as it approaches 2A. Therefore, a driving force release mechanism from the motor 20 while transmitting to the opening / closing member 2 a force greater than the repulsive force of the sealing member or the urging member for driving the opening / closing member 2 that increases in size as the opening / closing member 2 approaches the closed position 2A. The configuration of the present embodiment that allows the transmission operation up to this point is suitable for protecting the motor 20 and the gear mechanism 21 by securely closing the opening / closing member 2. In this embodiment, two torque limiters for reducing the transmission torque are used in the driving force releasing mechanism, but one of the torque limiters may be a torque limiter for interrupting the transmission torque.

(Output gear and output shaft)
FIG. 10 is a perspective view when the intermediate case 16, the output gear 27, the output shaft 11, and the gear member 91 of the fourth compound gear 26 are viewed from the first direction X1 side in the second direction X2. FIG. 11A is a plan view showing a state of the output gear 27 and the output shaft 11 when the opening / closing member 2 is arranged at the open position 2B, and FIG. 11B is a plan view showing the state where the opening / closing member 2 is arranged at the closed position 2A. It is a top view which shows the state of the output gear 27 and the output shaft 11 when it is performed. FIG. 12A is a plan view showing the state of the output gear 27 and the output shaft 11 when the opening / closing member 2 is located halfway between the open position 2B and the closed position 2A, and FIG. 12B is a plan view. 4) is a plan view showing a state of the output gear 27 and the output shaft 11 when the opening / closing member 2 is moved by a person in the closing direction C from the state of FIG.

  As shown in FIG. 10, the output gear 27 is a sector gear. The sector gear has tooth portions 27b in an angular range corresponding to the angular range (about 90 °) in which the opening / closing member 2 rotates. The output gear 27 rotates in the first rotation direction S1 (CW direction in FIG. 10) when the automatic closing device 1 drives the opening / closing member 2 toward the closing position 2A. Note that the first rotation direction S1 (CW direction) of the output gear 27 is opposite to the first rotation direction R1 (CCW direction) of the fourth compound gear 26 that meshes with the output gear 27.

The output gear 27 is attached to the fan-shaped end surface 27c on the side where the arm portion 46, which is a rotating member provided integrally with the output shaft main body portion 45 of the output shaft 11, from the front end surface 27a in the first rotation direction S1. It has a groove 105 extending in the circumferential direction in the second rotation direction S2 opposite to the rotation direction S1. The groove 105 has an arc shape centered on the rotation center line L0. An inner wall surface defining an end of the groove 105 in the second rotation direction S2 is a contact portion 105a that can contact the arm portion 46 . The output gear 27 moves between the output gear closed position 27A shown in FIG. 11B and the output gear open position shown in FIG. 11A while the opening / closing member 2 moves between the closed position 2A and the open position 2B. Move between 27B.

  As shown in FIGS. 4 and 10, the arm portion 46 has an extending portion 107 extending along a sector end surface (an end surface on which the groove 105 is formed) of the output gear 27, and a side of the output gear 27 from the extending portion 107. And a projection 108 protruding toward. The extending portion 107 extends in the radial direction orthogonal to the rotation center line L0. The protrusion 108 is inserted into the groove 105 so as to be movable in the circumferential direction. The rear surface of the protrusion 108 in the first rotation direction S1 is a contacted portion 108a to which the contact portion 105a of the output gear 27 can contact from behind in the first rotation direction S1.

That is, the arm 46 and the output gear 27, which are rotating members that rotate around the rotation center line L0, are configured such that the output gear 27 rotates in the first rotation direction S1, which is the driving direction, and the contact portion provided on the output gear 27. The so-called pin clutch 105 transmits the driving force by pressing the contact portion 108a of the arm portion 46 of the rotating member. According to this configuration, the arm 46 which is a rotating member on the transmission path of the driving force, the output shaft 11 integrally provided with the arm 46, and the opening / closing member 2 connected to the output shaft 11 are automatically attached to the opening / closing member 2. When an external force is applied that causes the closing device 1 to operate faster than the rotation in the first rotation direction S1, the transmission of the driving force between the abutting portion 105a and the abutted portion 108a is interrupted, so that the device operates only by the external force. Here, in the present embodiment, the contact portion 105a and the contacted portion 108a are in direct contact with each other to transmit the driving force, but a rubber or the like is provided between the contact portion 105a and the contacted portion 105b. The two members may indirectly contact each other to transmit the driving force in a configuration in which the elastic member is disposed or in a configuration in which the members are not in contact by using a magnetic repulsion force.

  When the automatic closing device 1 moves the opening / closing member 2 in the closing direction C, as shown in FIGS. 11A and 11B, the contact portion 105a of the output gear 27 rotating in the first rotation direction S1 (see FIG. The inner wall surface of the groove 105 abuts on the abutted portion 108a of the output shaft 11 from behind in the first rotation direction S1. Thus, the output shaft 11 rotates around the output gear 27 in the first rotation direction S1. In other words, the driving force is transmitted from the output gear 27 to the arm 46 as a rotating member, and the arm 46 rotates in the first rotation direction S1 in synchronization with the output gear 27. In addition, since the arm 46 as a rotating member rotates in the first rotation direction S1 in synchronization with the output gear 27, the output shaft 11 integrally including the arm 46 rotates in the first rotation direction S1.

  Here, the arm portion 46, which is a rotating member, does not mesh with the output gear 27 and rotates. Instead, the abutting portion 105a of the output gear 27 abuts on the abutted portion 108a, so that the arm 46 accompanies the output gear 27. Be turned around. Therefore, as shown in FIG. 12A, when the output gear 27 is rotated in the first rotation direction S1 by the drive of the motor 20, and the output shaft 11 is rotating in the first rotation direction S1 (opening / closing member). 2 is driven in the closing direction C), and when the opening / closing member 2 is moved in the closing direction C by manual operation, it is connected to the opening / closing member 2 as shown in FIG. Only the output shaft 11 and the arm 46 integral with the output shaft 11 rotate in the first rotation direction S1 so that the contacted portion 108a of the output shaft 11 is moved from the contact portion 105a of the output gear 27 in the first rotation direction S1. Separated in front of Therefore, when a person moves the opening / closing member 2 in the closing direction C, a mechanism portion (the pinion 22, the first compound gear 23, the first compound gear 23, The second compound gear 24, the fourth compound gear 26, the output gear 27) and the motor 20 do not act as loads. Therefore, the opening / closing member 2 can be moved in the closing direction C with a small force.

(Control system)
Next, the control system of the automatic closing device unit 7 includes the control unit 4 including a CPU and the like. As shown in FIG. 1A, on the input side of the control unit 4, a switch 5 for causing the automatic closing device 1 to start a closing operation and a closing position 2 </ b> A where the opening / closing member 2 abuts on the box 3 are arranged. The detector 6 for detecting the fact is connected. Further, a potentiometer 28 as the detector 6 is connected to the input side of the control unit 4. The motor 20 is connected to the output side of the control unit 4.

  When the switch 5 is operated, the controller 4 drives the motor 20 in the forward direction to drive the opening / closing member 2 toward the closed position 2A. The control unit 4 monitors the position of the opening / closing member 2 based on the output from the potentiometer 28 and controls the rotation of the motor 20. Further, when it is detected that the opening / closing member 2 has reached the closed position after driving the motor 20, the control unit 4 stops the motor 20. Then, the control unit 4 drives the motor 20 in the reverse direction to return the output gear 27 to the output gear open position 27B.

(Close operation of the opening / closing member by the automatic closing device unit)
FIG. 13 is a flowchart of the closing operation of the opening / closing member 2 by the automatic closing device unit 7. When the switch 5 is operated when the opening / closing member 2 is at the open position 2B, the control unit 4 drives the motor 20 in the forward direction (step ST1). Thereby, as shown in FIG. 1B, the opening / closing member 2 is driven in the closing direction C. Thereafter, when the detector 6 detects that the opening / closing member 2 is located at the closed position 2A (step ST2), the control unit 4 stops the motor 20 (step ST3). Thereafter, the control unit 4 drives the motor 20 in the reverse direction to return the output gear 27 to the output gear open position 27B (step ST4).

  Here, in this example, the gear mechanism 21 includes a driving force releasing mechanism (the fourth compound gear 26). Therefore, even when the motor 20 is driven by the control unit 4 after the opening / closing member 2 is disposed at the closed position 2A where the opening / closing member 2 abuts on the box body 3 due to an error in the arrangement of the detector 6 or a tolerance of parts. The transmission operation of the driving force by the transmission mechanism portion (the pinion 22, the second compound gear 24, and the third compound gear 25) from the motor 20 to the driving force releasing mechanism (the fourth compound gear 26) is allowed only for a predetermined period. You. Therefore, every time the opening / closing member 2 is arranged at the closed position 2A, it is possible to prevent the motor 20 from falling into an overload state. Therefore, it is possible to prevent the contacts and the like of the motor 20 from being damaged and shortening the product life of the motor 20. This can prevent the product life of the automatic closing device 1 from being shortened.

  Further, in this example, when the opening / closing member 2 is driven in the closing direction C, the output gear 27 causes the contact portion 105a to contact the contacted portion 108a of the output shaft 11 from the rear in the first rotation direction S1. Thus, the arm 46 as a rotating member is rotated. Accordingly, when the opening / closing member 2 is moved in the closing direction C by operation by a person while the opening / closing member 2 is moved in the closing direction C by the drive of the motor 20, the output shaft 11 connected to the opening / closing member 2 is moved. And only the arm 46 rotate in the first rotation direction S1. Therefore, when the opening / closing member 2 is moved in the closing direction C, the mechanism portion and the motor 20 located on the upstream side of the arm portion 46 in the driving force transmission direction in the gear mechanism 21 do not act as a load. Therefore, the driven opening / closing member 2 can be moved in the driving direction by a weak force by a person.

  Furthermore, in this example, when a person moves the opening / closing member 2 in the closing direction C, the output shaft 11 connected to the opening / closing member 2 and the arm portion 46 that is a rotating member provided integrally with the output shaft 11. Since only the rotary member rotates, the train wheel does not act as a load when the opening / closing member is moved manually. Therefore, the opening / closing member 2 can be moved in the driving direction with a small force.

  Further, in this example, when it is detected that the opening / closing member 2 is located at the closed position 2A, the control unit 4 drives the motor 20 in the reverse direction to return the output gear 27 to the output gear open position 27B. Therefore, it is possible to prevent the rotation of the output shaft 11 connected to the opening / closing member 2 from being transmitted to the output gear 27, for example, when the opening / closing member 2 disposed at the closed position 2A is moved in the opening direction by a person. Therefore, the opening / closing member 2 arranged at the closed position 2A can be moved in the opening direction by a weak force by a person.

  In this example, the gear mechanism 21 includes a torque limiter (second compound gear 24). Accordingly, it is possible to prevent the gear mechanism 21 and the motor 20 from being damaged when the opening / closing member 2 is operated in the direction opposite to the driving direction. It is preferable that the torque limiter be provided on the motor 20 side (upstream in the driving force transmission direction) of the arm portion 46 as a rotating member in the gear mechanism 21 as in the present embodiment. With this configuration, when the opening and closing member 2 is operated by an external force, the load of the torque limiter is not received, so that the opening and closing member 2 can be operated by a small external force.

  Here, the driving force releasing mechanism (the fourth compound gear 26) may operate with the same force or a small force with respect to the external force applied to the opening / closing member 2 on which the torque limiter (the second compound gear 24) operates. preferable. With this configuration, the torque of the function of securely closing the opening / closing member 2 and the torque of the protection function of the gear mechanism 21 and the motor 20 against a large external force can be set separately, so that reliability can be improved.

Further, in the present example, the output gear 27 is a sector gear provided with the tooth portions 27b in an angle range corresponding to the rotation angle range of the opening / closing member 2. Therefore, the space occupied by the output gear 27 can be suppressed as compared with the case where the output gear 27 is a circular gear. Therefore, it is easy to reduce the size of the automatic closing device 1.

  In this example, the contact portion 105a of the output gear 27 that contacts the contacted portion 108a of the output shaft 11 is closer to the front end edge (front end surface 27a) of the output gear 27 (sector gear) in the first rotation direction S1. Is also provided at the rear. Therefore, it is possible to suppress the arm portion 46 from protruding forward from the front edge of the output gear 27 (sector gear). Therefore, in the first rotation direction S1 of the output gear 27, it is easy to reduce the size of the device.

  Further, in this example, the protrusion 108 of the arm 46 is inserted into the groove 105 of the output gear 27 so as to be movable in the circumferential direction. Therefore, when the opening / closing member 2 is moved in the closing direction C by a person, the rotation of the output shaft 11 can be guided by the groove 105.

( Reference example )
The output gear and the output shaft of the reference example will be described with reference to FIGS. FIG. 14 is a perspective view of the output gear and the output shaft when viewed from the first direction X1 in the second direction. FIG. 15A is a plan view showing the state of the output gear 27 and the output shaft 11 when the opening / closing member 2 is arranged at the open position 2B, and FIG. It is a top view which shows the state of the output gear 27 and the output shaft 11 when it is performed. FIG. 16A is a plan view showing the state of the output gear 27 and the output shaft 11 when the opening / closing member 2 is located halfway between the open position 2B and the closed position 2A, and FIG. 4) is a plan view showing a state of the output gear 27 and the output shaft 11 when the opening / closing member 2 is moved by a person in the closing direction C from the state of FIG. Since the output gear and the output shaft of the reference example have shapes corresponding to the output gear 27 and the output shaft 11, corresponding portions are denoted by the same reference numerals and described.

  As shown in FIG. 14, the output gear 27 is a sector gear. The sector gear has tooth portions 27b in an angular range corresponding to the angular range (about 90 °) in which the opening / closing member 2 rotates. The output gear 27 rotates in the first rotation direction S1 (CW direction in FIG. 14) when the automatic closing device 1 drives the opening / closing member 2 toward the closing position 2A. The output gear 27 is moved from the front end surface 27a in the first rotation direction S1 to the second rotation on the sector end surface 27c on the side where the arm 46, which is a rotation member provided integrally with the output shaft main body 45 of the output shaft 11, is located. It has a cutout recess 110 cutout in the direction S2. The inner wall surface defining the end in the second rotation direction S <b> 2 in the notch recess 110 is a contact portion 110 a that can contact the arm portion 46. While the opening / closing member 2 moves between the closed position 2A and the open position 2B, the output gear 27 is moved to the output gear closed position (second angular position) 27A shown in FIG. In the output gear open position (first angular position) 27B shown in FIG.

  The output shaft 11 integrally includes an output shaft main body 45 extending in the X direction along the rotation center line L0, and an arm 46 as a rotating member that rotates about the rotation center line L0. The arm 46 extends in a radial direction orthogonal to the rotation center line L0. The shape of the arm 46 when viewed from the X direction is tapered as the arm 46 moves away from the output shaft main body 45. As shown in FIG. 14, the arm 46 has a front end portion (outer peripheral side portion) that can be accommodated in the cutout recess 110. That is, the arm 46 has a height in the X direction that is equal to or less than the depth of the notch 110 in the X direction. The rear surface of the arm portion 46 in the first rotation direction S1 is a contacted portion 46a with which the contact portion 115a provided on the output gear 27 contacts from the rear in the first rotation direction S1.

When the automatic closing device 1 moves the opening / closing member 2 in the closing direction C, as shown in FIGS. 14A and 14B, the contact portion 110a of the output gear 27 that rotates in the first rotation direction S1 ( The inner wall surface of the notch recess 110 contacts the contacted portion 46a of the output shaft 11 from behind in the first rotation direction S1. Thus, the output shaft 11 rotates around the output gear 27 in the first rotation direction S1. In other words, the driving force is transmitted from the output gear 27 to the arm 46 as a rotating member, and the arm 46 rotates in the first rotation direction S1 in synchronization with the output gear 27. Further, the arm 46 as a rotating member is connected to the output gear 2.
7, the output shaft 11 integrally including the arm 46 rotates in the first rotation direction S1.

  Here, the arm portion 46, which is a rotating member, does not mesh with the output gear 27 and rotates. Instead, the abutting portion 105a of the output gear 27 abuts on the abutted portion 108a, so that the arm 46 accompanies the output gear 27. Turned. Therefore, as shown in FIG. 15A, when the output gear 27 rotates in the first rotation direction S1 by driving the motor 20, the output shaft 11 rotates in the first rotation direction S1 (opening / closing member). 2 is driven in the closing direction C), when the opening / closing member 2 is moved in the closing direction C by manual operation, as shown in FIG. Only the output shaft 11 and the arm 46 integral with the output shaft 11 rotate in the first rotation direction S1, and the contacted portion 46a of the arm 46 is moved from the contact portion 110a of the output gear 27 in the first rotation direction S1. Separated in front of Therefore, when a person moves the opening / closing member 2 in the closing direction C, a mechanism portion (the pinion 22, the first compound gear 23, the first compound gear 23, The second compound gear 24, the fourth compound gear 26, the output gear 27) and the motor 20 do not act as loads. Therefore, the opening / closing member 2 can be moved in the closing direction C with a small force.

  In this example, the arm portion 46 provided integrally with the output shaft 11 can be accommodated in the cutout recess 110 at the tip end portion. Therefore, it is possible to suppress the arm portion 46 from protruding forward from the front edge of the output gear 27 (sector gear). Therefore, in the first rotation direction S1 of the output gear 27, it is easy to reduce the size of the device. The height of the arm 46 is not more than the depth of the notch 110 in the X direction. Therefore, the size of the automatic closing device 1 can be reduced in the X direction (direction along the rotation center line L0).

(Other embodiments)
In the above example, the arm 46 as a rotating member is integrated with the output shaft 11. However, the arm 46 and the output shaft 11 are separated from each other, and the rotational force transmitted to the arm 46 is used for a wheel train, a cam, and the like. It is also possible to adopt a configuration in which the power is transmitted to the output shaft 11 via the driving force transmission path. More preferably, when the arm 46 is provided integrally with the output shaft 11 as in the present embodiment, the arm 46 as a rotating member is fixed to the output shaft 11. In this case, the driving force transmitted to the arm portion 46 is directly transmitted to the output shaft 11, so that there is no wheel train transmitting the driving force between the rotating member and the opening / closing member 2. With this configuration, such a train does not act as a load when the opening / closing member 2 is moved manually. Further, even if the output shaft 11 and the arm 46 which are formed separately are coaxially mechanically fixed, fixed with an adhesive or the like, or connected, the arm 46 as a fixing member is fixed to the output shaft 11. The effect of is obtained.

  Further, a locking portion may be provided on the opening / closing member 2 and the box body 3 may be provided with a locking mechanism for removably locking with the locking portion. In this case, the locking mechanism includes a locking claw that can be locked to the locking portion of the opening / closing member 2 that has reached the closed position 2A, a locking position for locking the locking claw to the locking portion, and a locking portion. A support mechanism that movably supports the locking claw to the locking position, a spring member that urges the locking claw to the locking position, and a locking mechanism that moves the locking claw disposed at the locking position to the separation position. May be provided. With this configuration, when the opening / closing member 2 is disposed at the closed position 2A, the locking portion of the opening / closing member 2 and the locking mechanism provided on the box 3 are locked, and the opening / closing member 2 is closed. Is fixed to the box 3.

  Furthermore, the opening / closing member 2 may be provided with a locking portion, the box body 3 may be provided with a locking mechanism, and a biasing member for biasing the opening / closing member 2 from the closed position 2A to the open position 2B may be provided. With this configuration, when the operating portion of the locking mechanism is operated to move the locking claw to the separated position after the opening and closing member 2 is fixed to the box 3 at the closed position 2A, the urging force of the urging member is Thereby, the opening / closing member 2 at the closed position 2A can be moved to the open position 2B.

  In the above example, the opening / closing member driving device of the present invention is applied to the automatic closing device 1, but the present invention can also be applied to an automatic opening device in which the opening / closing member 2 is disposed at the open position 2B. In this case, when a person moves the opening / closing member 2 in the opening direction while the automatic opening device drives the opening / closing member 2 in the opening direction, the gear mechanism 21 or the motor 20 may act as a load. Absent. Therefore, the driven opening / closing member 2 can be moved in the opening direction by a weak force by a person.

  Further, in the above example, the opening / closing member driving device (the automatic closing device 1) rotates the opening / closing member 2 in the up-down direction. However, the opening / closing member 2 may be turned in the horizontal direction.

1 .. Automatic closing device (opening / closing member drive device)
2, opening / closing member 4, control unit 6, detector 7, automatic closing device unit (opening / closing member drive unit)
11, output shaft 20, motor 21, gear mechanism (transmission mechanism)
24..2nd compound gear (torque limiter)
27. ・ Output gear (transmission gear, final gear, sector gear)
27A ··· Output gear closed position (second angular position)
27B ··· Output gear open position (first angular position)
27a ··· Front end face of output gear (front end edge)
45 Output shaft main body 46 Arm (rotary member)
105, groove 105a, abutting portion 107, extending portion 108, protruding portion 108a, abutted portion 110, notched concave portion 110a abutting portion L0, rotation center line S1, first rotation direction

Claims (7)

A transmission mechanism for transmitting the driving force of the motor to an output shaft to which the opening / closing member is connected,
The transmission mechanism includes a transmission gear to which the driving force of the motor is transmitted, and a rotating member positioned downstream of the transmission gear in the driving force transmission direction,
The rotating member includes a contacted portion at a position radially separated from the rotation center line,
The transmission gear includes a contact portion that contacts the contacted portion from behind in the first rotation direction to rotate the rotating member when the transmission gear rotates in the first rotation direction ,
The transmission gear is a sector gear,
The rotating member includes an arm portion extending in the radial direction,
The contacted part is provided on the arm part,
The arm portion includes an extending portion extending in a direction intersecting the rotation center line, and a protruding portion projecting from the extending portion toward the sector gear.
The sector gear includes a groove on a sector end face facing the arm portion, extending from a front end face in the first rotation direction in a second rotation direction opposite to the first rotation direction,
The groove has an arc shape centered on the rotation center line,
The protrusion is inserted into the groove so as to be movable in a circumferential direction,
An opening / closing member driving device , wherein an inner wall surface defining an end in the second rotation direction in the groove is the contact portion . In claim 1 ,
The opening / closing member driving device, wherein the rotating member is coaxial with the transmission gear. In any one of claims 1 and 2 ,
The opening / closing member driving device, wherein the rotating member is rotatably supported by the transmission gear. In any one of claims 1 to 3 ,
The transmission gear is a final gear of the transmission mechanism,
The opening / closing member driving device, wherein the rotating member is fixed to the output shaft. In any one of claims 1 to 4 ,
The opening / closing member driving device, wherein the transmission mechanism includes a reduction gear train. In any one of claims 1 to 5 ,
The opening / closing member driving device, wherein the transmission mechanism includes a torque limiter. An opening and closing member drive device according to any one of claims 1 to 6 ,
A detector for detecting that the opening / closing member is disposed at the closed position;
A control unit for driving and controlling the motor,
The transmission gear rotates between a first angular position and a second angular position located forward of the first angular position in the first rotation direction;
The control unit drives the motor in the forward direction to rotate the transmission gear in the first rotation direction, thereby moving the opening / closing member toward the closed position, and driving the motor in the forward direction. When the detector detects that the opening / closing member is located at the closed position, the motor is driven in the reverse direction to return the transmission gear to the first angular position. Opening / closing member drive unit.

Images