JP5308132B2 - Door shock absorber - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a door damping device in which a damping mechanism portion can be compactly housed in an upper horizontal frame for being provided with the damping mechanism portion or within the longitudinal width of a door. <P>SOLUTION: This door damping device includes the damping mechanism portion 11 which is provided in either the upper horizontal frame 7 of the door frame 2 or an upper end of the door 1, and a pushing action portion 51 which is provided at the other one of them and which transfers a pushing force in the rotation direction of the door 1 to the damping mechanism portion 11 at the rotational closing of the door 1. Characteristically, the damping mechanism portion 11 comprises: a receiving portion 47 which makes the pushing force transferred to the pushing action portion 51, so as to move it in a longitudinal direction; a motion conversion mechanism which converts the forward and backward motions of the receiving portion 47 to a horizontal motion set at a stroke longer than the forward and backward stroke of the receiving portion 47; and a telescopic shock absorber 43 which is horizontally expanded/contracted to damp the horizontal motion converted by the motion conversion mechanism. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a door shock absorber for mitigating an impact generated when a door is closed.

  As a conventional door shock absorber, for example, the one shown in Patent Document 1 is known. In this case, an arm provided rotatably around the vertical axis and a buffer mechanism for buffering the rotating operation of the arm are provided on the upper horizontal frame of the door frame as a buffer mechanism. 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, since the buffer mechanism acts on the pivoting movement of the arm, it tends to be large in the front-rear direction. Therefore, it is difficult to compactly fit the buffer mechanism part in the front-rear width of the upper horizontal frame. There is a case where the buffer mechanism portion cannot be provided on the small upper horizontal frame.
JP 2006-283460 A

The present invention was made in view of the above problems, and an object thereof is to provide a door buffering device can be accommodated compactly in the longitudinal within the width of the upper horizontal frame the buffer unit.

In order to solve the above-described problems, the door shock absorber according to the present invention is provided at the shock absorber mechanism 11 provided on the upper horizontal frame 7 of the door frame 2 and the upper end of the door 1, and when the door 1 is turned. There is provided a pressing portion 51 that transmits a pressing force to the buffer mechanism 11 in the direction of rotation of the door 1, and the longitudinal direction of the upper horizontal frame 7 and the width direction of the door 1 are set to the left and right directions, and 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, and the shock-absorbing mechanism 11 is movable in the front-rear direction. Part 47, a motion conversion mechanism that converts the back-and-forth motion of the receiving part 47 into a left-right motion that is longer than the back-and-forth stroke of the receiving part 47, and the motion conversion mechanism that is expanded and contracted in the left-right direction have a shock absorber 43 to buffer left and right operation, Before and after the stroke of the part 47, characterized in that the fit in the upper lateral frame 7 before and after the width of the.

In the present invention, the motion conversion mechanism includes a fixed side link 48 pivotally supported around the vertical axis and a movable side link 49 pivotally connected to the fixed side link 48 around the vertical axis. And the receiving portion 47 is provided at a bent portion of the rectangular link mechanism 45, and the receiving portion 47 operates in the front-rear direction to move the movable side link. It is preferable that the end portion 49 moves in the left-right direction with a stroke longer than the front-rear stroke of the receiving portion 47 , and the motion in the left-right direction is buffered by the shock absorber 43.

Further, the buffer unit 11 is preferably provided on Tsumoto side of the upper horizontal frame 7. In addition, the suspension base side here means the half part by the side of the door rotation axis | shaft in the left-right direction of the upper horizontal frame 7. As shown in FIG .

In the first aspect of the present invention, when the pressing action portion transmits a pressing force to the receiving portion of the buffer mechanism portion and the receiving portion moves in the front-rear direction when the door is closed, the receiving portion moves back and forth. The motion conversion mechanism converts the motion to the left and right direction, and the motion in the left and right direction is buffered by the shock absorber, whereby the rotational motion of the door can be buffered. Therefore, the front and rear width of the buffer mechanism portion can be reduced, and the buffer mechanism portion can be compactly accommodated within the front and rear width of the upper horizontal frame in plan view. In addition, since the motion conversion mechanism converts the longitudinal motion of the receiving portion into a lateral motion that is longer than the longitudinal stroke of the receiving portion, a large shock absorbing force can be obtained by the shock absorber. Moreover, since the said buffering mechanism part is provided in the upper horizontal frame fixed to a building frame, a buffering mechanism part can be operated stably and the durability of a buffering mechanism part also improves. Further, when the door is opened, the receiving portion does not protrude from the upper horizontal frame, and the appearance is good.

  According to the second aspect of the present invention, the motion conversion mechanism can be configured by a simple mechanism using a link mechanism.

According to the third aspect of the present invention, the buffering force of the door by the buffer mechanism can be applied from when the door opening angle is large .

  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 shock absorber of this example constitutes a door opening / closing drive device together with a door retracting device, which will be described later, and slowly and automatically closes the door 1 when closed to a predetermined opening angle by the action of the door opening / closing drive device. It is designed to be closed. Among these, the door retracting device has a function of automatically closing the door 1 when closed to a predetermined opening angle, and the door shock absorber has a function of alleviating an impact generated when the door 1 is 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 suspending side of the upper horizontal frame 7, and includes a pulling mechanism 10 and a buffer mechanism 11 shown in FIG. 8, and a casing 12 (see FIG. 2) covering them. That is, in this example, the buffer mechanism 11 is provided on the upper horizontal frame 7 of the door frame 2.

  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 for connecting the protruding base ends of both the claw portions 33 and 34 is provided. An opening 36 is formed between the claw portions 33 and 34 of the catcher 14 so as to open front and rear and downward.

  The connecting portion 35 located at the upper portion of the catcher 14 is formed with a pivoted support portion 37 that protrudes in the front-rear direction. The pivoted support portion 37 is pivotally supported by the suspension-side end portion of the moving member 28. 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.

  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 the claw portions 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. At this time, the catched portion 9 gradually moves forward as the door 1 rotates in the opening direction, and the insertion depth of the catcher 14 into the opening 36 is reduced.

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.

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, a pressing force in the door closing direction is applied to the receiving portion 47 of the buffer mechanism portion 11 at the position corresponding to the receiving portion 47 at the upper end portion on the back surface of the door 1 when the door is turned. A pressing action part 51 for transmission is provided, and the pressing action part 51 and the buffer mechanism part 11 constitute a door shock absorber. The pressing portion 51 is made of a metal fitting attached to the upper end of the door 1, and has a belt-like pressing surface that is substantially flush with the rear surface of the door 1 and parallel to the rear surface of the door 1. In this example, the pressing action portion 51 is configured by a metal fitting separate from the door 1, but the pressing action portion 51 may be configured at a location corresponding to the receiving portion 47 of the door 1.

  As shown in FIG. 8B, the base 40 is formed in a substantially groove shape that opens forward, the base 13 is placed on the upper surface thereof, and the rear edge piece 18 of the base 13 is screwed to the upper surface portion of the base 40. By doing so, it is attached to the base 13. 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 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 conversion unit 42 includes a link mechanism unit 45 that is provided in the base 40 in a plan view, a biasing member 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 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. The receiving portion 47 is provided at a position corresponding to the pressing surface of the pressing action portion 51 provided in the door 1 described above. Note that the material and shape of the receiving portion 47 are merely examples.

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. Further, the shock absorbing mechanism portion 11 of this example is configured so that the front and rear stroke of the receiving portion 47 is accommodated 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, an elastic force that rotates the fixed side link 48 of the link mechanism part 45 in the extended state as an urging member 46 forward. The torsion spring which provides is provided. As a result, the link mechanism 45 is urged by the urging member 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 surface of the pressing portion 51 of the door 1 has not yet hit the receiving portion 47.

  After this, when the door 1 is slightly rotated in the closing direction by the pull-in mechanism section 10, the receiving section provided in the link mechanism section 45 in which the pressing surface of the pressing action section 51 of the door 1 is in a bent state. 47, and 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. At this time, the receiving part 47 provided rotatably in the link mechanism part 45 rolls the pressing surface of the pressing action part 51 to the left and right hand side according to the closing operation of the door 1. The friction between the receiving portion 47 and the pressing portion 51 is reduced, and the door 1 can be smoothly closed.

  As described above, the shock-absorbing mechanism 11 in the door shock absorber of the present example includes the motion conversion unit 42 that converts the rotational motion when the door 1 is closed into the left-right motion of the operating body 41. Using the operating body 41 that can move in the longitudinal direction of the horizontal frame 7 and the telescopic shock absorber 43 that expands and contracts in the moving direction of the operating body 41, the rotational movement of the door 1 can be buffered. 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 the link mechanism 45, for example, as shown by a and b in FIG. 16, the movement amount in the left-right direction of the end of the fixed side link 48 on the movable side link 49 side is extended from the bent state. It gets smaller as it gets closer to. 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.

  Further, the motion conversion unit 42 is provided on the hanging side of the upper horizontal frame 7. For this reason, the shock absorbing function of the door shock absorber can be activated from the time when the opening angle of the door 1 is large, and in this case, the amount of protrusion of the link mechanism 45 to the door 1 side when the door 1 is bent is set. It can be kept small and looks good when the door 1 is opened.

  Further, in this example, even when the link mechanism portion 45 is in the bent state, the entire buffer mechanism portion 11 is disposed within the front-rear width of the upper horizontal frame in plan view as shown in FIG. For this reason, the appearance when the door 1 is opened can be further improved.

  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.

  In this example, the buffer mechanism portion 11 is provided in the upper horizontal frame 7 and the pressing action portion 51 is provided in the upper end portion of the door 1. Conversely, the buffer mechanism portion 11 is provided in the upper end portion of the door 1. You may provide the said press action part 51 in the upper horizontal frame 7 while providing. Further, although the door retracting device is provided in addition to the door shock absorbing device, only the door shock absorbing device may be provided without providing the door retracting device.

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 horizontal frame same as the above, and a buffer mechanism part.

DESCRIPTION OF SYMBOLS 1 Door 2 Door frame 7 Upper horizontal frame 11 Buffer mechanism part 41 Actuator 42 Operation | movement conversion part 43 Shock absorber 45 Link mechanism part 46 Bending elastic body 47 Contact part 48 Fixed side link 49 Movable side link 51 Covered part

Claims (3)

A buffer unit provided on the horizontal frame of the door frame, provided at the upper end of the door, a pressing action portion for transmitting the pressing force to the buffer mechanism during closing of the door rotation, longitudinal upper lateral frame And the width direction of the door is defined as the left-right direction, the direction perpendicular to the longitudinal direction of the upper horizontal frame in plan view, and the thickness direction of the door as the front-rear direction. A receiving part that moves in the pressing direction by being pressed by contact, a motion conversion mechanism that converts the back-and-forth motion of the receiving part into a left-right motion that is longer than the front-rear stroke of the receiving part, and the left-right direction stretch to have a shock absorber to cushion the converted left and right operation of the motion conversion mechanism, a door buffering device before and after the stroke is equal to or fit within longitudinal width of the upper lateral frame receiving portion. The motion conversion mechanism has a rectangular shape in plan view, which is composed of a fixed side link pivotally supported about a vertical axis and a movable side link pivotally connected to the fixed side link about a vertical axis. A link mechanism portion, and the receiving portion is provided at a bent portion of the link-shaped link mechanism portion, and the end portion of the movable side link is more than the front-rear stroke of the receiving portion by moving the receiving portion in the front-rear direction. 2. The door cushioning device according to claim 1, wherein the door cushioning device operates in a left-right direction with a long stroke and cushions the motion in the left-right direction by the shock absorber. The buffer unit includes a door Shock absorber according to claim 1 or claim 2, characterized in that provided on Tsumoto side of the upper horizontal frame.

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