JP5308131B2 - Door opening and closing drive device - Google Patents

Description

  The present invention relates to a door opening / closing drive device that slowly and automatically closes a door closed to a predetermined opening angle.

  As a conventional door opening / closing drive device, for example, the one disclosed in Patent Document 1 is known. In this device, a retracting mechanism is provided on the upper horizontal frame of the door frame, and the retracting mechanism is provided with an arm provided so as to be rotatable about a vertical axis. When the door is closed, the pin provided on the door is introduced and locked into the long groove of the arm that projects obliquely forward on the hand side, and thereafter the arm is rotated backward by the elastic force of the spring. As a result, the door is automatically closed.

  Further, the upper horizontal frame is provided with a buffer mechanism portion having a buffer mechanism for buffering the arm and the pivoting operation of the arm. The shock-absorbing mechanism includes a hollow cylindrical outer frame and a movable ring that acts on the pivot shaft of the arm and is fitted to the outer frame with a predetermined interference fit.

However, the door retracting device of Patent Document 1 is such that the arm pivots back and forth, and the buffer mechanism acts on the pivoting operation of the arm and tends to increase in the front-rear direction. It is difficult to compactly store the door opening / closing drive device portion having the pull-in mechanism portion and the buffer mechanism portion in the upper horizontal frame, and the door opening / closing drive device may not be provided when the front / rear width of the upper horizontal frame is small.
JP 2006-283460 A

  The present invention has been made in view of the above-described conventional problems, and an object of the present invention is to provide a door opening / closing drive device that can be compactly accommodated within the longitudinal width of the upper horizontal frame.

In order to solve the above problems, the door opening / closing drive device of the present invention defines the thickness direction of the door 1 as the front-rear direction, the door opening / closing drive unit 8 provided in the upper horizontal frame 7 of the door frame 2, The door opening / closing drive unit 8 is provided with a retracting mechanism portion 10 and a buffer mechanism portion 11 provided at an upper end portion and protruding backward from the door 1, and the retracting mechanism portion 10 includes an upper horizontal frame. A catcher 14 that is slidable in the longitudinal direction 7 and that is detachably engaged with the catched portion 9 when the door 1 is closed to a predetermined opening angle, and a catcher 14 that is engaged with the catched portion 9 are arranged in an upper horizontal frame. 7 is provided with a drive unit 16 that is driven to the suspending side in the longitudinal direction of 7 to close the door 1, and a pressing action that transmits a pressing force to the buffer mechanism unit 11 when the door is closed at the upper end of the door 1. Part 51 is provided and the buffer The structure 11 includes a receiving portion 47 that can move in the front-rear direction when the pressing action portion 51 comes into contact with the pressing force and a motion conversion mechanism that converts the front-rear motion of the receiving portion 47 into a left-right motion. And a shock absorber 43 that expands and contracts in the left-right direction to buffer the converted left-right motion of the motion conversion mechanism, and the receiving portion 47 and the motion conversion mechanism of the buffer mechanism portion 11 are arranged vertically with the retracting mechanism portion 10. It is provided. Here, the thickness direction of the door 1 is defined as the front-rear direction, the width direction of the door 1 is defined as the left-right direction, and the direction in which the door 1 is operated when the door 1 in the closed state is opened is defined as the front side. .

  In the present invention, it is preferable that the retracting mechanism portion 10 and the buffer mechanism portion 11 are coupled so that the relative positions of the upper horizontal frame 7 in the longitudinal direction can be changed.

According to the first aspect, the retracting mechanism portion drives the catcher engaged with the catched portion in the longitudinal direction of the upper horizontal frame to automatically close the door, so that the front-rear width can be reduced. In addition, since the buffer mechanism unit includes an operation conversion unit that converts the rotation operation when the door is closed into the left-right operation of the operating body, the operating body that is movable in the left-right direction and the movement of the operating body Using a telescopic shock absorber that expands and contracts in the direction, the rotational movement of the door can be buffered. For this reason, the front-rear width of the buffer mechanism can be reduced. Furthermore, the receiving part of the said buffer mechanism part and the operation | movement conversion mechanism are provided side by side with the drawing-in mechanism part . For this reason, the door opening / closing drive unit can be compactly accommodated within the front-rear width of the upper horizontal frame in plan view.

  According to the second aspect of the present invention, the positional relationship in the longitudinal direction of the upper horizontal frame of both the retracting mechanism portion and the buffer mechanism portion can be changed. The buffer start position of the door by the unit can be changed to a desired position according to the shape, material, size, weight, application, user preference, and the like of the door.

  Hereinafter, an example of an embodiment of the present invention will be described with reference to the accompanying drawings. In the following, the longitudinal direction of the upper horizontal frame 7 and the width direction of the door 1 are defined as the left-right direction, the direction orthogonal to the longitudinal direction of the upper horizontal frame 7 in plan view, and the thickness direction of the door 1 are defined as the front-rear direction. Moreover, let the direction which operates the door 1 when opening the door 1 in a closed state be a front side.

  The door opening and closing drive device of the present example includes a door retracting device that automatically closes the door 1 when closed to a predetermined opening angle, and a door shock absorber that relieves shock generated when the door 1 is closed, By both, the door 1 at the time of closing closed to a predetermined opening angle is automatically and slowly closed.

  As shown in FIG. 7 and the like, the side end of the door 1 is rotatably connected to one vertical frame 3 of the door frame 2 via a hinge 4. A door stop 5 protrudes from the inner peripheral surface of the rear part of the door frame 2, and the door 1 is entirely housed in the door frame 2 in a closed state in which the rear edge of the door 1 is in contact with the door stop 5.

  As shown in FIG. 1, the door opening / closing drive device includes a catch member 6 provided on the door 1 and a door opening / closing drive unit 8 provided on the upper horizontal frame 7 of the door frame 2.

  The member 6 to be caught is provided at the end of the rear upper end of the door 1 on the suspension base side. The catch member 6 includes a catch portion 9 that protrudes toward the back of the door 1, and the catch portion 9 is formed in a substantially plate shape with a small thickness.

  The door opening / closing drive unit 8 is provided on the hanging side of the upper horizontal frame 7 (the hanging side here means a half of the side of the door rotating shaft in the left-right direction of the upper horizontal frame 7). The retracting mechanism section 10 and the buffer mechanism section 11 shown in FIG. 2 and a casing 12 (see FIG. 2) covering them.

  First, the retracting mechanism unit 10 will be described. As shown in FIGS. 9 and 10, the retracting mechanism 10 includes a retracting mechanism base 13 that is long to the left and right (hereinafter simply referred to as a base 13), a catcher 14 provided on the base 13, a drive unit 16, and The guide member 17 is used. The pull-in mechanism 10 and the above-described caught member 6 constitute a door pull-in device.

  As shown in FIGS. 3 and 5, the base 13 is formed in a substantially groove shape that is long on the left and right and opens downward, and is fitted in a long fitting groove 20 on the left and right formed on the rear lower surface of the upper horizontal frame 7. The rear edge piece 18 protruding rearward from the lower edge of the rear surface portion of the base 13 is attached to the upper horizontal frame 7 along the lower surface of the upper horizontal frame 7. The base 13 is accommodated within the front-rear width of the upper horizontal frame 7 in plan view, and is disposed rearward of the front end of the door stop 5 provided on the upper horizontal frame 7.

  The guide member 17 is housed inside the base 13 and is fixed to the base 13. As shown in FIG. 10, a slide groove 21 is formed in the guide member 17 that is long in the left and right and opens downward and on the hand side (on the opposite side to the suspension side in the left-right direction).

  The opening 22 of the slide groove 21 is formed from the end surface on the hand side of the guide member 17 to the lower surface. A lock portion 25 is constituted by a vertical end surface of the guide member 17 in which the opening 22 is formed, and a rail portion 24 is constituted by a horizontal lower surface of the guide member 17 in which the opening 22 is also formed. Moreover, the rail part 24 and the lock | rock part 25 are smoothly connected by the guide part 26 which consists of a front view arc-shaped surface.

  The drive unit 16 urges an elastic force in a direction to drive the moving member 28 to the suspending side in the left-right direction, and the moving member 28 that is slidable in the left-right direction with respect to the base 13. And an elastic member 29.

  A spring housing groove 30 (see FIG. 11) is formed on the hand side of the moving member 28. A tension spring is accommodated in the spring accommodating groove 30, and an elastic member 29 is constituted by the tension spring.

  The end of the elastic member 29 on the suspending side is locked to the base 13, and the end on the opposite side is locked to the moving member 28. Accordingly, the moving member 28 is always urged toward the suspension side by the elastic member 29. A disposition groove 31 (see FIG. 10) that opens downward is formed at the end of the moving member 28 on the suspending side.

  A catcher 14 that can be detachably engaged with the catched portion 9 is provided at the end of the suspending side of the moving member 28 so that the upper portion of the catcher 14 is accommodated in the arrangement groove 31 and can be rotated to the left and right. . The rotation axis direction of the catcher 14 is parallel to the front-rear direction.

  The catcher 14 moves to the suspension side in the left-right direction by driving the moving member 28 to the suspension side by the elastic member 29 of the drive unit 16.

  The catcher 14 is made of a member that is thin in the front-rear direction and has a substantially inverted U-shape when viewed from the front. Further, a connecting portion 35 that connects the protruding proximal ends of the protruding portions 33 and 34 is provided. An opening 36 is formed between the protrusions 33 and 34 of the catcher 14 so as to open forward and backward and downward.

  The connecting portion 35 located at the upper portion of the catcher 14 is formed with a pivoted portion 37 that protrudes in the front-rear direction. 14 is rotatable with respect to the moving member 28.

  The catcher 14 is rotatable in a range from a standby posture that opens obliquely downward on the hand side shown in FIG. 11 to an engagement posture that opens substantially vertically downward as shown in FIG. 9. The upper portion of the catcher 14 is brought into contact with the moving member 28 when the standby posture and the engagement posture are reached, and thereby the rotation range of the catcher 14 is limited to the range from the standby posture to the engagement posture. Guided portions 38 are formed to project from both the front and rear sides of the hand side portion of the catcher 14.

  The end of the moving member 28 on the suspending side is housed in the slide groove 21 of the guide member 17 so as to be slidable in the left-right direction, and the pivoted support portion 37 of the catcher 14 provided in the same portion It is free to move in the direction.

  Both guided portions 38 of the catcher 14 are arranged along the rail portion 24, the lock portion 25, or the guide portion 26 of the guide member 17.

  In the catcher 14, the both guided portions 38 are guided by the guide member 17 as shown in FIG. 13, and accordingly, the catcher 14 has the both guided portions 38 in a standby posture along which the both guided portions 38 are along the lock portion 25. Rotates within a range up to the engagement posture along the rail portion 24.

  In the catcher 14 shown in FIGS. 12A and 13A, the moving member 28 is urged toward the suspension side by the elastic member 29, the both guided portions 38 abut against the lock portion 25, and the standby It is in a locked state in a posture. In this locked state, the first claw portion 33 of the catcher 14 protrudes below the base 13, the guide member 17, and the second claw portion 34.

  Now, when the catcher 14 is in the locked state, the door 1 is rotated in the closing direction by a human hand from the opened state. Then, the catched portion 9 protruding rearward from the door 1 is a suspension base side in the left-right direction in front view as shown in FIGS. 12 (a) to 12 (c) and FIG. 13 (a) to (d). When the door 1 is closed to a predetermined opening angle, it is engaged with the catcher 14.

  Specifically, when the opened door 1 is closed to a predetermined opening angle, first, as shown in FIG. 13A, the catched portion 9 passes under the second claw portion 34 of the catcher 14 in the locked state. Then, as shown in FIG. 13 (b), it comes into contact with the first claw portion 33 of the catcher 14.

  When the catched portion 9 further moves to the suspension base side, the first claw portion 33 of the catcher 14 is pressed to the suspension base side by the catched portion 9, whereby both guided portions 38 of the catcher 14 are moved from the lock portion 25. It moves downward along the guide part 26 and is in a state along the rail part 24. Then, as both guided portions 38 are guided along the guide portion 26 in this manner, the catcher 14 rotates from the standby posture shown in FIG. As shown, the catched portion 9 is engaged with the opening 36. Both protrusions 33 and 34 of the catcher 14 in this engagement posture protrude below the base 13 and the guide member 17.

  Further, as described above, when both guided portions 38 reach the rail portion 24 from the lock portion 25 via the guide portion 26, the locking of the both guided portions 38 to the lock portion 25 is released, and the moving member 28 is The elastic member 29 is driven to the suspension side by the elastic force.

  At this time, the catcher 14 is engaged as shown in FIGS. 12 (c) and 13 (d) in a state in which both guided portions 38 travel along the rail portion 24 and the engagement posture is maintained. It moves to the suspension side in the left-right direction together with the catched portion 9 that has been caught. At this time, the catched portion 9 gradually moves backward as the door 1 rotates in the closing direction, and the insertion depth of the catcher 14 into the opening 36 is increased.

  And the to-be-caught part 9 moves to the suspension origin side in this way, and the door 1 closed to the predetermined opening angle will rotate automatically, and will be in a closed state.

  Conversely, the closed door 1 is rotated in the opening direction by a human hand. Then, the catched portion 9 moves to the hand side in the left-right direction when viewed from the front, and disengages from the catcher 14 when the door 1 is opened to a predetermined opening angle.

Specifically, when the closed door 1 is opened to a predetermined opening angle, the second claw portion 34 of the catcher 14 is pressed toward the hand side by the catched portion 9 that moves toward the hand side, and the moving member 28 moves together with the catcher 14. It moves to the hand side against the elastic force of the elastic member 29. At this time, both the guided portion 38 of the catcher 14 is moved to the hand side along the rail part 24, thereby catcher 14 is moved to the hand side while maintaining the engagement posture.

When the door 1 to move the further hand side the catch portion 9 has exceeded a predetermined opening angle, both the guided portion 38 of the catcher 14 extending from the rail unit 24 to the guide portion 26. In this way, when the both guided portions 38 are disengaged from the rail portion 24, the catcher 14 is rotatable in the range from the engagement posture to the standby posture. For this reason, when the catched portion 9 further moves to the hand side, both guided portions 38 move upward along the guide portion 26 and become in a state along the lock portion 25. Then, the guided portions 38 are guided by the guide portions 26 in this way, so that the catcher 14 rotates from the engagement posture to the standby posture, and is in the locked state shown in FIGS. 12 (a) and 13 (a). At this time, the engagement of the catched portion 9 with the opening 36 of the catcher 14 is released. Since the lower end of the second claw portion 34 is positioned above the lower end of the first claw portion 33 of the catcher 14 in this standby posture, when the door 1 is further opened, the catched portion 9 of the catcher 14 is The door 1 can be opened without any trouble by passing the lower side of the two claw portions 34.

  As described above, in the door retracting apparatus of this example, the catcher 14 drives in the longitudinal direction of the upper horizontal frame 7 to close the door 1. For this reason, the front-rear width of the retracting mechanism portion 10 provided in the upper horizontal frame 7 can be reduced, and the retracting mechanism portion 10 can be compactly accommodated within the front-rear width of the upper horizontal frame 7 in plan view.

Next, the buffer mechanism 11 will be described. 14 and 15 includes a buffer mechanism base 40 that is long to the left and right (hereinafter simply referred to as a base 40), and an operation conversion mechanism and a shock absorber 43 provided on the base 40. Yes. Further, as shown in FIG. 2, at the position corresponding to the receiving portion 47 on the back surface of the door 1, a pressing action that transmits a pressing force in the door closing direction to the receiving portion 47 of the buffer mechanism portion 11 when the door is closed. A portion 51 is provided, and the pressure acting portion 51 and the buffer mechanism 11 constitute a door shock absorber.

  As shown in FIG. 8B, the base 40 is formed in a substantially groove shape that opens forward. The rear edge piece 18 of the base 13 is provided with a plurality (two in the illustrated example) of through holes 53 for screw insertion. Further, screw holes 55 are provided in positions corresponding to the plurality of through holes 53 on the upper surface portion of the base 40 of the buffer mechanism 11. The base 13 is placed on the upper surface of the base 40, and the base 13 and the base 40 that are vertically stacked in this manner are screwed into the screw holes 55 with screws 54 inserted through the through holes 53. The rear edge piece 18 is connected to the upper surface portion of the base 40 to be connected.

  The base 40 is housed within the front-rear width of the upper horizontal frame 7, and is disposed behind the front end of the door stop 5 provided on the upper horizontal frame 7.

A storage portion 44 is formed at the end of the base 40 on the hand side. The upper portion of the storage portion 44 protrudes upward from the upper surface portion on which the base 13 is placed, and this portion is located on the side of the hand 13 side of the base 13.

  The motion conversion mechanism converts the front-rear motion of the receiving portion 47 into a left-right motion that has a longer stroke than the front-rear stroke of the receiving portion 47, and includes an actuating body 41 and a motion converting portion 42.

The actuating body 41 is housed in a housing portion 44 formed at the end on the hand side of the base 40 that opens forward so as to be slidable in the left-right direction. The lower part of the operating body 41 protrudes toward the hand side from the upper part and is longer in the sliding direction. Therefore, the operating body 41 can slide stably in the storage portion 44.

  The operation conversion unit 42 operates the actuating body 41 in the left-right direction according to the turning operation when the door 1 is closed.

  The motion converting unit 42 includes a link mechanism unit 45 that is provided in the base 40 in a plan view, a bending elastic body 46, and a receiving unit 47 that is provided in the link mechanism unit 45.

The link mechanism unit 45 includes a fixed side link 48 located on the hanging side and a movable side link 49 located on the hand side and longer than the fixed side link 48. One end of the fixed side link 48 is housed in the hanging side portion of the base 40 and is connected to be rotatable about the vertical axis. One end of the movable side link 49 is connected to the other end of the fixed side link 48 so as to be rotatable about the vertical axis. The other end of the movable side link 49 is connected to the lower part of the operating body 41.

  The receiving portion 47 is made of rubber and formed in a cylindrical shape, and is provided at a connecting portion between the fixed side link 48 and the movable side link 49 so as to be rotatable around the vertical axis. A part of the receiving portion 47 in the circumferential direction always protrudes forward from the connecting portion of the fixed side link 48 and the movable side link 49.

In the link mechanism portion 45, the fixed portion link 48 rotates with respect to the base 40 by the receiving portion 47 operating in the front-rear direction, whereby the fixed side link 48 and the movable side link 49 are moved to the left and right as shown in FIG. It can be deformed in a range from a state of being substantially parallel to the direction and extending in a straight line to a state in which the fixed side link 48 is bent in a square shape in plan view toward the diagonally forward side on the hand side as shown in FIG. It has become. In the state shown in FIG. 14, the link mechanism 45 is housed in the base 40, and in the state shown in FIG. 16, the connecting portion between the fixed side link 48 and the movable side link 49 projects forward from the base 40 and the door stop 5. Thus, the operating body 41 moves in the left-right direction by changing the link mechanism 45 to the extended state or the bent state. The shock absorbing mechanism portion 11 of the present example is designed so that the front and rear strokes of the receiving portion 47 are within the front and rear width of the upper horizontal frame 7, and even when the link mechanism portion 45 protrudes forward to the maximum. It fits in the front-rear width of the upper horizontal frame 7 as viewed.

  Between the end part pivotally supported by the base 40 of the fixed side link 48 and the base 40, the fixed side link 48 of the link mechanism part 45 in the extended state is rotated forward as an elastic body 46 for bending. A torsion spring that provides an elastic force is disposed. As a result, the link mechanism 45 is urged by the bending elastic body 46 so as to maintain the bent state shown in FIG.

The shock absorber 43 is telescopic, and cushions the operation of the operating body 41 in the left-right direction by expanding and contracting in the left-right direction. In the present embodiment, the shock absorber 43 is a one-way type that generates a resistance force only when contracted, and is provided in the storage portion 44. By adopting the one-way type, there is an advantage that a feeling of resistance is not felt in the door opening operation. The shock absorber 43 is connected to the base 40 on the hand side and to the operating body 41 on the suspension side, thereby buffering the operation of the operating body 41 in the left-right direction. As the resistor that causes the shock absorber 43 to attenuate, various conventionally known resistors such as oil, air, and spring are used.

  The link mechanism unit 45 shown in FIG. 16 is in a bent state, and the receiving unit 47 is in the most forward position.

  Now, when the link mechanism 45 is in the bent state shown in FIG. 16 and the catcher 14 is in the locked state, the opened door 1 is rotated in the closing direction by a human hand. Then, first, when the door 1 is closed to a predetermined opening angle, the catched portion 9 is engaged with the catcher 14, and the pull-in of the door 1 by the pull-in mechanism portion 10 described above is started. At this time, as shown in FIG. 7, the pressing portion 51 of the door 1 has not yet hit the receiving portion 47.

  After that, when the door 1 is slightly rotated in the closing direction by the retracting mechanism portion 10, the pressing action portion 51 of the door 1 hits the receiving portion 47 provided in the link mechanism portion 45 in the bent state, Thereafter, until the door 1 is completely closed, the pressing action portion 51 presses the receiving portion 47 by the driving force of the retracting mechanism portion 10 to move backward. At this time, the link mechanism 45 is deformed from the bent state to the extended state, and the operating body 41 moves to the hand side against the resistance of the shock absorber 43 accordingly, so that the door 1 is gently moved. Closed.

  The buffer mechanism unit 11 of this example includes an operation conversion unit 42 that converts the rotation operation when the door 1 is closed into the horizontal operation of the operating body 41, and is movable in the longitudinal direction of the upper horizontal frame 7. The rotating operation of the door 1 can be buffered using the operating body 41 and the telescopic shock absorber 43 that expands and contracts in the moving direction of the operating body 41. For this reason, the front-rear width of the buffer mechanism portion 11 provided in the upper horizontal frame 7 can be reduced, and the buffer mechanism portion 11 can be compactly accommodated within the front-rear width of the upper horizontal frame 7 in plan view.

  Further, in the link mechanism portion 45, the movable side link 49 that is longer than the fixed side link 48 is longer, so the left / right stroke of the operating body 41 is longer than the front / rear stroke of the receiving portion 47. For this reason, a large shock absorbing force can be obtained by the shock absorber 43.

In addition, as shown in FIGS. 16A and 16B, the link mechanism 45 has a smaller amount of movement in the left-right direction at the end of the fixed side link 48 on the movable side link 49 side as it approaches the extended state from the bent state. Become. For this reason, when the door 1 is closed, a larger buffering force can be applied at an early stage where a large force is easily received.

In the door opening / closing drive device of this example, in the door opening / closing drive unit 8 including the pull-in mechanism unit 10 and the buffer mechanism unit 11, the receiving unit 47 and the motion conversion mechanism of the buffer mechanism unit 11 are retracted. It is arranged side by side with the mechanism unit 10 . Further, the retracting mechanism portion 10 and the buffer mechanism portion 11 are coupled so that the relative positions of the upper horizontal frame 7 in the longitudinal direction can be changed.

  Specifically, as shown in FIG. 8 (b), a plurality of screw holes 55 used to connect the pull-in mechanism 10 with screws 54 are formed on the upper surface of the base 40 of the buffer mechanism 11. A plurality of sets (two sets in the illustrated example) are provided side by side in the longitudinal direction of the horizontal frame 7.

  Further, by screwing screws 54 inserted into the through holes 53 of the base 13 into arbitrary sets of screw holes 55, the longitudinal direction of the upper horizontal frame 7 relative to the retracting mechanism portion 10 and the buffer mechanism portion 11 ( The position in the left-right direction) can be changed.

  In other words, when the screw hole 55a on the hand side is selected as the screw hole 55 into which the screw 54 is screwed, the retracting mechanism unit 10 is brought closer to the storage unit 44 as shown in FIG. In this state, the retracting mechanism unit 10 and the buffer mechanism unit 11 can be connected, and the door opening / closing drive unit 8 can be formed in a substantially rectangular shape in front view.

  When the screw hole 55b on the suspension side is selected as the screw hole 55 into which the screw 54 is screwed, the retracting mechanism unit 10 is moved away from the storage unit 44 toward the suspension side as shown in FIG. The retracting mechanism unit 10 and the buffering mechanism unit 11 can be connected in a state of protruding from the buffering mechanism unit 11 to the suspension side.

  Thus, in the door opening / closing drive device of this example, the position of the pull-in mechanism portion 10 and the buffer mechanism portion 11 in the longitudinal direction of the upper horizontal frame 7 can be changed. The start position and the buffer start position of the door 1 by the buffer mechanism 11 can be changed to a desired position according to the shape, material, size, weight, application, user preference, and the like of the door 1.

  In this example, a plurality of sets of screw holes 55 of the base 40 of the buffer mechanism unit 11 are provided. However, by providing a plurality of sets of through holes 53 of the base 13 of the drawing mechanism unit 10, the drawing mechanism unit 10 and the buffer mechanism unit 11 are provided. The position of the pull-in mechanism 10 and the buffer mechanism 11 may be adjusted by other means.

  In this example, the position of the retracting mechanism unit 10 with respect to the buffer mechanism unit 11 can be changed in two stages, but it may be changed in three or more stages.

  In this example, the door 1 is stored in the door frame 2 when the door 1 is closed. However, the closed door 1 may be configured such that only the rear portion is stored in the door frame 2. It may be located in front of the door frame 2.

It is an example of an embodiment of the invention, and is a perspective view seen from the door front side showing a state in which the door is opened. It is the perspective view which looked at the state which opened the door same as the above from the door rear side. It is the perspective view which showed the state just before a to-be-caught part engages with a catcher same as the above, and abbreviate | omitted some illustrations. It is the perspective view which abbreviate | omitted some illustrations which show the state which closed the door same as the above. The catch portion in the upper catcher is a side sectional view showing a state immediately before the engagement. It is a rear view which shows the state which closed the door same as the above. It is a bottom view which shows the state just before a press action part same as the above hits a receiving part. The door opening / closing drive unit is shown, wherein (a) is an overall perspective view, and (b) is a perspective view in which a retracting mechanism portion and a buffer mechanism portion are separated. It is the perspective view which showed a part of drawing-in mechanism part same as the above in the cross section. It is a disassembled perspective view of the drawing-in mechanism part which abbreviate | omitted illustration of the base same as the above. It is a side view of the drawing-in mechanism part which abbreviate | omitted illustration of the base same as the above. It is explanatory drawing which showed the state which a to-be-caught part engages with a catcher in order when a door same as the above is closed, (a) shows the state immediately before a to-be-caught part engages with a catcher, (b) A state where the catched portion is engaged with the catcher is shown, and (c) shows a state where the door is closed. It is explanatory drawing which showed the state which a to-be-caught part engages with a catcher in order when a door same as the above is closed, (a) shows the state immediately before a to-be-caught part engages with a catcher, (b) A state where the catched portion is in contact with the first claw portion of the catcher is shown, (c) shows a state where the guided portion is guided by the guide portion, and (d) shows a state where the door is closed. It is a perspective view which shows a buffer mechanism part same as the above. It is a disassembled perspective view of a buffer mechanism part same as the above. It is explanatory drawing which shows the positional relationship of an upper frame same as the above and a buffer mechanism part. It is a perspective view of the door opening / closing drive unit which connected the buffer mechanism part same as the above, and the drawing-in mechanism part spaced apart in the left-right direction.

DESCRIPTION OF SYMBOLS 1 Door 2 Door frame 7 Upper horizontal frame 9 Catched part 10 Pull-in mechanism part 11 Buffer mechanism part 14 Catcher 16 Drive part 41 Actuator 42 Operation conversion part 43 Shock absorber

Claims (2)

The door thickness direction is defined as the front-rear direction, the width direction of the door is defined as the left-right direction, and the door operating direction is defined as the front side when opening the door in the closed state. An opening / closing drive unit, and a catched portion provided at an upper end portion of the door and projecting backward from the door. The door opening / closing drive unit includes a retracting mechanism portion and a buffer mechanism portion, and the retracting mechanism portion is A catcher that is slidable in the longitudinal direction of the frame and detachably engages with the catched portion when the door is closed to a predetermined opening angle, and a catcher engaged with the catched portion is suspended in the longitudinal direction of the upper horizontal frame. A drive portion that drives the former side to close the door is provided, and a pressing action portion that transmits a pressing force to the buffer mechanism portion when the door is closed is provided at the upper end portion of the door. , Pressing part A receiving portion that can move in the front-rear direction by transmitting a pressing force by contact, a motion conversion mechanism that converts the front-rear motion of the receiving portion into a left-right motion, and the motion conversion mechanism that expands and contracts in the left-right direction A door opening / closing drive device comprising: a shock absorber for buffering the converted left and right motions, wherein the receiving portion of the buffer mechanism portion and the motion converting mechanism are provided side by side with the retracting mechanism portion .   2. The door opening / closing drive device according to claim 1, wherein the retracting mechanism portion and the buffer mechanism portion are coupled so as to be capable of changing the relative positions of the upper horizontal frame in the longitudinal direction.

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