JP2006291548A - Free stop mechanism of self-closing type slide door - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a free stop mechanism of a self-closing type slide door capable of always providing a stable free stop effect and compact in structure. <P>SOLUTION: A rotating body 30 having a rotation transmitted through the engagement of gears according to the sliding operation of a sliding door D is connected coaxially with the braking device 20 of a rotary damper. The stopper 42 of a rotation control means 40 is pressed, from the side, against the pressed part 30b of the rotary body 30, and its free stop state is held by a magnet 41 to restrict the rotation of the rotating body 30 so as to stop the sliding door D at a specified opened position. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention particularly relates to a free-stop mechanism for a self-closing slide door that stops a sliding door such as a sliding door or a folding door that automatically slides and closes at an arbitrary position during the sliding operation. About.

  Conventionally, in this type of free stop mechanism, for example, as shown in FIG. 15, a guide rail 3 for slidably suspending a sliding door 1 through door wheels 2 and 2 is provided on one side in the closing direction indicated by the arrow. Suspended in a slightly tilted state to have a self-closing structure that automatically closes the sliding door 1, while an elastic stopper (elastic locking member) 4 such as rubber is pivotally supported on the sliding door 1 in a swingable manner. Even if the tip of the elastic stopper 4 is pressed against the upper surface of the guide rail 3 and the sliding door 1 tries to slide in the closing direction, the elastic force is generated between the support shaft 5 and the guide rail 3 due to the friction between the elastic stopper 4 and the guide rail 3. There is a structure in which the stopper 4 is stretched so that the brake works and the sliding door 1 is temporarily stopped at an arbitrary position on the guide rail 3.

On the other hand, conventionally, a self-closing slide door usually does not cause a loud collision sound by colliding with the door when it is self-closed, or injured with a finger etc. in between. Various brake devices such as an air brake are separately provided around the vehicle, and when self-closed, the brake device is configured to slide while decelerating with such a brake device.
JP-A-8-42230 JP 2000-168041 A

  However, the conventional free stop mechanism has a structure in which the end of the elastic stopper 4 is pressed against the guide rail 3 and the sliding door 1 is stopped by applying a brake by friction with the guide rail 3. The elastic stopper 4 is likely to slip on the guide rail 3 due to dust or dust that adheres and accumulates, and does not generate sufficient friction with the guide rail 3, so that the brake cannot be used stably. was there. As a result, conventionally, there has been a problem that the sliding door 1 cannot be reliably stopped at a desired open position, and a stable original free stop effect cannot be obtained.

  Moreover, conventionally, a self-closing slide door is usually provided with a braking device as described above, but separately from this, a free stop mechanism is installed around the same door. It is laborious and time consuming, is troublesome, the device is complicated and large in size, requires an extra large installation space around the door, and also has an unpleasant appearance and requires an aesthetic appearance. There was a problem that the interior of the door was not preferable.

  SUMMARY OF THE INVENTION An object of the present invention is to solve the above-described conventional problems, and to provide a free-stop mechanism for a self-closing slide door that is always stable and has a compact structure.

  Therefore, in order to solve the above-mentioned problem, the invention according to claim 1 is automatically slid in the closing direction from the open position by the guide rail L as shown in the illustrated embodiment shown below. In the free-stop mechanism of the self-closing slide door configured to stop the sliding door such as the sliding door D at any open position during the sliding at the time of opening and closing, the same mounting body 15 fixed on the sliding door, A braking device 20 that applies a braking force and decelerates when the sliding door is closed, a rotating body 30 to which rotation is transmitted through meshing of gears according to a sliding operation of the sliding door, and the rotating body 30 And a rotation control means 40 for stopping the rotation of the brake device 20. The braking device 20 has a barrel 21 fixed to the mounting body 15 and a tip shaft portion 22a protruding from the barrel 21. And a rotor housed in the barrel 21 so as to be rotatable about the rotor shaft 22 as a fulcrum. A gap between the rotor and the barrel 21 is filled with a viscous fluid and sealed in the barrel 21. The rotor 30 is formed by a rotary damper that generates a braking torque by the viscous resistance of the viscous fluid when the rotor rotates. The rotating body 30 has a gear portion 30a and an annular pressure contact portion 30b on the same axis, and the rotor shaft 22 The rotation control means 40 is rotatably attached to the distal end shaft portion 22a of the rotary body 30, while being in pressure contact with the peripheral surface of the pressed contact portion 30b of the rotating body 30 so that the distal end can be abutted from the side thereof, on the proximal end side The magnetic stopper 42 is pivotally connected to the mounting body 15 with the support shaft 45 as a fulcrum, and the stopper 42 is adsorbed and always oriented perpendicular to the peripheral surface of the pressure contact portion 30b of the rotating body 30. Magnetically energized magne Characterized by comprising a preparative 41.

  According to a second aspect of the present invention, in the free-stop mechanism for the self-closing slide door according to the first aspect, for example, as in the illustrated embodiment shown below, the rotation control means 40 is connected to the rotary body 30 by pressure contact. The abutting strength of the stopper 42 against the peripheral surface of the portion 30b can be adjusted.

  According to the first aspect of the present invention, the stopper is pressed from the side against the pressure contact portion of the rotating body to which rotation is transmitted according to the sliding motion of the sliding door, and the free stop state is held by the magnet. The rotation of the rotating body is restricted and the sliding door is stopped at the desired open position, so that the stopper slips due to the influence of dust and dirt on the guide rail and the brake does not work. As a result, the sliding door can be surely stopped at a desired open position and a stable free stop effect can be exhibited. In addition, the same mounting body fixed on the sliding door is integrally provided with the rotating body of the free stop mechanism and the rotation control means for stopping the rotation of the rotating body together with the braking device. The entire structure of the free stop mechanism has been made compact. As a result, the installation work of the device can be simplified without much trouble, and the installation space around the door can be reduced as much as possible. Further, the appearance around the door can be improved. Can be improved.

  According to the second aspect of the present invention, by adjusting the abutting strength of the rotating body against the pressed contact portion of the rotating body by the stopper, it is possible to easily cope with the rotating torque of the rotating body depending on the difference in the weight of the sliding door. In addition, a stable free stop effect can always be obtained.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  1 and 2 show a sliding door structure to which a free-stop mechanism for a self-closing slide door according to the present invention is applied. The sliding door structure A includes a guide rail L that is fixed to the ceiling side wall surface W in the figure, and a sliding door D that is suspended by the guide rail L. The guide rail L has a substantially L-shaped cross-section in which a guide groove g is formed in the length direction, and is installed with the right door end side in the figure inclined slightly downward. On the other hand, the sliding door D is equipped with a suspended vehicle body m / n that rotatably supports the doors 10 and 11 on the door end side and the door bottom side of the upper end surface, and engages the doors 10 and 11 with the guide groove g. It is a door type slide door that is suspended by a guide rail L so as to be slidable in the left and right opening and closing directions in the figure. And especially at the time of closing, it has the self-closing structure which rolls the doors 10 and 11 by its own weight by the guide of the inclined guide rail L, and automatically slides in the closing direction X and closes. Note that an L-plate-like door stop 12 is fixed to the ceiling-side wall W on the door bottom side of the suspended vehicle body n.

  In the sliding door structure A, each of the suspended vehicle bodies m and n is fixed to the door end side and the door bottom side of the upper end surface of the sliding door D with the angle plate-like support plates 13 and 14 standing, and these support plates 13 and 14 are fixed. In addition, the door pulleys 10 and 11 are pivotally supported in the vertical direction. On the other hand, the door-end-side suspended vehicle body m has a structure in which the door pulley 10 is provided with a gear portion 10a for rotation transmission coaxially therewith, and a free stop assembly F is attached to the support plate 13.

  As shown in FIGS. 3 and 4, the free stop assembly F has a configuration in which a mounting body 15, a braking device 20, a rotating body 30, and a rotation control means 40 that are assembled to the mounting body 15 are integrally provided. Yes.

  The attachment body 15 includes a first attachment bracket 16 and a first attachment bracket 17, both of which are made of metal. The first mounting bracket 16 includes a substantially U-shaped component assembling frame portion 16a and a rectangular connecting plate portion 16b. The second mounting bracket 17 is formed by bending into a channel shape using a metal plate, a horizontally long magnet mounting recess 17b is formed on one side of the groove bottom surface 17a, and a support tube 17c is fixed on the other side. A female screw hole 18 is screwed into the support tube 17c.

  The braking device 20 includes a cylindrical case-shaped barrel 21 having a pair of mounting protrusions 21a on the circumferential surface, and a rotor barrel 22 having a distal end shaft portion 22a protruding from the barrel 21 so as to be rotatable. A rotor (not shown) accommodated in the cylinder 21, and a gap between the outer peripheral surface of the rotor and the inner peripheral surface of the cylinder 21 is filled with a viscous fluid and sealed in the cylinder 21. It consists of a so-called rotary damper that generates braking torque by the viscous resistance of a viscous fluid when it rotates.

  The rotating body 30 is made of resin and is formed by coaxially and integrally forming a gear portion 30a and an annular pressure contact portion 30b, and an elastic ring 31 made of urethane is fitted on the outer periphery of the pressure contact portion 30b. In the free stop assembly F, the rotating body 30 is connected to the tip end shaft portion 22a of the rotor shaft 22 penetrating the center hole 32 so as to be integrally rotatable with the rotor in the rotary damper 20 via a one-way clutch 33. Yes. And when the rotary body 30 rotates in the load direction shown by the arrow a in the figure, the rotary damper 20 is structured to generate braking torque. The rotating body 30 and the rotary damper 20 thus connected are attached to the first mounting bracket 16 by screwing the mounting protrusion 21a to the component mounting frame portion 16a, whereby the first portion of the free stop assembly F is assembled. One assembly unit F1 is assembled.

  The rotation control means 40 is composed of a magnet 41 and a stopper 42. The magnet 41 has a rectangular parallelepiped shape, and is fitted into the magnet mounting recess 17b of the second mounting bracket 17 and screwed. On the other hand, the stopper 42 includes a magnetic metal link 43, a rectangular parallelepiped resin inner piece 44, a screw-shaped support shaft 45, and a position adjusting screw 46.

  The link 43 has, on one side surface in the thickness direction, a piece storage recess 43a that is formed in a rectangular shape that is longer than the inner piece 44, and a insertion groove that is carved in a U shape on the base end side in the length direction of the piece storage recess 43a. 43b, and a tapered abutting convex portion 43c is projected from the end face on the front end side in the length direction. An elongated hole escape (not shown) is formed on the other side surface in the thickness direction near the abutting projection 43c. On the other hand, the inner piece 44 is provided with a shaft hole 44a penetrating in the thickness direction, and a female screw hole 44b is screwed on one end face orthogonal to the shaft hole 44a. The position adjusting screw 46 has an annular flange 46a on the periphery of the screw head, and is connected to the inner piece 44 by screwing the screw shaft portion 46b into the female screw hole 44b.

  The stopper 42 having such a component structure is formed by inserting the annular flange 46a of the position adjusting screw 46 into the U-shaped insertion groove 43c of the link 43 and fitting the inner piece 44 into the piece receiving recess 43a. To the support tube 17c through the support shaft 45. Then, the stopper 42 is attached to the second mounting bracket 17 so as to be swingable with the support shaft 45 as a fulcrum at a position overlapping with the magnet 41, whereby the second assembly unit F2 of the free stop assembly F is assembled. It becomes. Therefore, in the second assembly unit F2, the stopper 42 has the second mounting bracket in a state where the magnetic link 43 is attracted to the magnet 41 on the back side and is always magnetically biased in a linear direction overlapping with the magnet 41. 17 is held. Further, when the position adjustment screw 46 is screwed to adjust the screwing position of the inner piece 44 with respect to the female screw hole 44b, the stopper 42 linearly moves in the left-right length direction relative to the inner piece 44. This makes it possible to adjust the protruding position of the abutting protrusion 43c at the tip.

  Therefore, in the free stop assembly F, the second mounting bracket 17 assembled with the rotation control means 40 is fixed to the component assembling frame portion 16a of the first mounting bracket 16 with the set screw 19, and the abutting projection of the stopper 42 is achieved. The first and second assembly units F1 and F2 are connected in a state where the portion 43c is pressed against the pressed contact portion 30b of the rotating body 30 via the elastic ring 31 from the lateral direction. As a result, the first mounting bracket 16 and the second mounting bracket 17 are integrated to form the mounting body 15, and the braking device 20, the rotating body 30 and the rotation control means 40 are integrally attached to the same mounting body 15. The free stop assembly F thus assembled is assembled.

  In the sliding door structure A, as shown in FIGS. 5 and 6, the free stop assembly F is in a lateral state in which the stopper 42 presses the abutting convex portion 43 c against the pressure contact portion 30 b of the rotating body 30 from the side. In addition, the connecting plate portion 16b of the first mounting bracket 16 is screwed to the support plate 13 of the door end side suspended vehicle body m, and the gear portion 30a of the rotating body 30 is connected to the gear portion 10a of the door pulley 10 mounted on the suspended vehicle body m. Engage and connect.

  Now, in the sliding door structure A provided with the free stop assembly F as described above, for example, to close the sliding door D, when the sliding door D is pulled in the closing direction X as shown in FIG. The sliding door D automatically slides in the closing direction X according to its own weight and the inclination of the guide rail L. When the sliding door D slides in the closing direction X, the rotation of the door pulley 10 is transmitted to the rotating body 30 of the free stop assembly F through the meshing of the gear portions 10a and 30a in the door-side suspended vehicle body m. , In the load direction indicated by the solid arrow a in FIG. When the rotating body 30 rotates in the load direction a, the rotational force is transmitted to the rotor of the rotary damper 20 by the action of the one-way clutch 33, so that a braking torque is generated in the rotary damper 20, and the rotating body 30 uses the brake. It rotates under the load condition. Then, the rotation of the door pulley 10 is also braked, and the sliding door D slowly self-closes while decelerating accordingly.

  When the sliding door D is self-closed, when the stopper 42 is in a state in which the abutting projection 43c at the tip is inclined downward toward the upstream side in the rotation direction a of the rotating body 30 and is in pressure contact with the pressure contact portion 30b, The abutting projection 43c slips on the elastic ring 31 of the pressure contact portion 30b, and the rotating body 30 rotates in the load direction a as it is. Thereby, the sliding door D slides in the closing direction X while decelerating as it is, and is self-closed. At this time, the stopper 42 is held in a free state in which the abutting projection 43c is inclined downward by the magnetic force of the magnet 41 that urges the stopper 42 in a horizontal direction.

  Therefore, when the sliding door D is stopped at an arbitrary open position as necessary during the self-closing of the sliding door D, the sliding door D is forcibly moved in the opening direction indicated by the arrow Y in FIG. Pull back once. Then, the door pulley 10 rotates in the reverse direction, and accordingly, the rotating body 30 rotates strongly in the non-load direction indicated by the dotted line arrow b in FIG. 8, and the stopper 42 is supported by the friction with the pressure contact portion 30b. It is rocked against the magnetic force in the counterclockwise direction in FIG. Then, after the horizontal projecting state in which the abutting convex portion 43c hits the pressed contact portion 30b most strongly, as shown in FIG. 9, the abutting convex portion 43c is inclined upward and pressed into the pressed contact portion 30b. Switch to the free stop state. Then, even if the hand is released from the handle now, the rotation of the rotating body 30 in the rotation direction a is restricted by the stopper 42, whereby the sliding door D is stopped at the desired open position without self-closing. At this time, the stopper 42 is held in a free stop state in which the abutting convex portion 43c is directly upward by the magnetic force of the magnet 41 that urges the stopper 42 in a horizontal direction.

  Thereafter, in order to close the sliding door D again, the sliding door D is forcibly pulled back in the opposite closing direction indicated by the arrow X in FIG. 2, and as shown in FIG. What is necessary is just to switch to the free state of the downward inclination in which the convex part 43c faced the rotation direction a upstream of the rotary body 30. FIG.

  Contrary to the above, when opening the sliding door D, if the sliding door D is pushed and pulled in the opening direction Y as shown in FIG. 2, the door pulleys 10 and 11 roll on the guide rail L, and the sliding door D opens. Slide in direction Y. When the sliding door D slides in the opening direction Y, the rotation of the door pulley 10 is transmitted to the rotating body 30 of the free stop assembly F through the meshing of the gear portions 10a and 30a in the hanging vehicle body m on the door end side. Rotates in the non-load direction indicated by the dotted arrow b in FIG. That is, when the rotating body 30 rotates in the non-load direction b, transmission of the rotational force to the rotor is disconnected by the one-way clutch 33 and no braking torque is generated in the rotary damper 20, so the rotating body 30 is almost non-rotating. Rotates under load.

  When the sliding door D is opened, the stopper 42 is in a state where the abutting protrusion 43c at the tip is inclined upward toward the upstream side in the rotational direction b of the rotating body 30 and is in pressure contact with the pressure contact portion 30b. The projecting portion 43c slips on the elastic ring 31 of the pressure contact portion 30b, and the rotating body 30 rotates as it is. As a result, the sliding door D slides in the opening direction Y almost in an unloaded state. At this time, the stopper 42 keeps the abutting protrusion 43c in an upwardly inclined state by the magnetic force of the magnet 41 that urges the stopper 42 in a horizontal direction.

  Therefore, when the sliding door D is stopped as necessary during the opening of the sliding door D, as shown in FIG. 9, the stopper 42 moves the abutting convex portion 43 c to the upstream side in the rotational direction b of the rotating body 30. Since the rotation of the rotating body 30 in the rotational direction a is restricted by the stopper 42 when it is in a state where it is inclined upward and pressed against the pressure contact portion 30b, when the hand is released from the handle, the sliding door D stops without self-closing. Also at this time, the stopper 42 is maintained in a free stop state in which the abutting convex portion 43c is directed upward by the magnetic force of the magnet 41 that urges the stopper 42 in a horizontal direction.

  When the sliding door D is fully closed and then opened again, the sliding door D is forcibly pulled back in the closing direction indicated by the arrow X in FIG. 2, and the stopper 42 is moved to the abutting projection as shown in FIG. The part 43c is once switched to the upward inclined state toward the upstream side in the rotational direction b of the rotating body 30 and then slid while pushing and pulling the sliding door D as it is.

  By the way, in the above free stop mechanism, the rotational torque of the rotating body 30 differs depending on the weight of the sliding door such as the suspended sliding door D, but the rotating body 30 by the stopper 42 corresponds to the rotating torque of the rotating body 30. The abutting strength against the pressure contact portion 30b can be adjusted.

  In that case, as shown in FIG. 10 or FIG. 11, the stopper 42 is in a horizontal protruding state in which the abutting convex portion 43 c abuts most strongly against the pressure contact portion 30 b. On the other hand, the position adjustment screw 46 is screwed using a driver 49 to adjust the amount of screwing into the inner piece 44. Then, in the stopper 42, the link 43 slightly moves to the left and right in the length direction in the drawing with respect to the inner piece 44 according to the screwing amount of the position adjusting screw 46, and the protruding position of the abutting protrusion 43c is finely adjusted. The Thereby, the abutting strength of the stopper 42 is adjusted to a desired size by using the biting depth of the abutting convex portion 43c with respect to the elastic ring 31 as a guide.

  In the above illustrated embodiment, the example in which the free stop mechanism of the present invention is applied to the sliding door structure A provided with a door type sliding door is shown. However, the present invention is as shown in FIGS. The present invention can also be applied as it is to the sliding door structure B provided with the slide rail type sliding door. Hereinafter, in the illustrated other example, the same components as those in the above-described free stop mechanism of the illustrated example will be described with the same reference numerals.

  In another example shown in the figure, the guide rail L provided in the sliding door structure B is slidably engaged with the outer rail 50 on the fixed side through a large number of balls held by the retainer (not shown) on the moving side. It consists of a thin slide rail. A long gear rack 52 is secured to the outer rail 50 on one side surface, and the racks 53 and 54 are assembled to the inner rail 51 on the bottom side and the bottom side. On the other hand, the sliding door D has suspension bolts 55 and 56 erected on the door end side and the door bottom side of the upper end surface. Then, the outer rail 50 is fixed to the ceiling side, the entire guide rail L is laid with the right door tip side inclined slightly downward in the figure, and hanging bolts 55 and 56 are hung on the hanging metal fittings 53 and 54, respectively. The sliding door D is suspended by a guide rail L so as to be slidable in the left and right opening and closing directions in the figure. In particular, when closing, the inner rail 51 is slid by its own weight by the guide of the inclined guide rail L, and the sliding door D is automatically slid in the closing direction to be closed.

  Therefore, in such a sliding rail type sliding door structure B, a horizontal mounting plate 57 of the mounting body 15 is fixed to the door end side of the upper end surface of the sliding door D to mount the free stop assembly F. Then, the gear portion 30a of the rotating body 30 is engaged with the rack 52 on the guide rail L side, and thereby, the rotation is transmitted to the rotating body 30 of the free stop assembly F according to the sliding operation of the sliding door D. ing.

  Therefore, also in the slide rail type sliding door structure B, when the sliding door D is stopped at an arbitrary open position during the self-closing of the sliding door D, the sliding door D is indicated by an arrow Y in FIG. As shown in FIG. 9, the fleece in which the stopper 42 of the free stop assembly F is pressed against the pressure contact portion 30b with the abutting convex portion 43c inclined upwards as shown in FIG. Switch to the top state. Then, the rotation of the rotating body 30 in the rotation direction a is restricted by the stopper 42, and thereby the sliding door D is stopped at the open position without self-closing.

  On the other hand, when the sliding door D is stopped while the sliding door D is being opened, the stopper 42 causes the abutting convex portion 43c to rotate in the rotational direction of the rotating body 30 as shown in FIG. b When tilted upward toward the upstream side and in pressure contact with the pressure contact portion 30b, the rotation of the rotating body 30 in the rotation direction a is restricted by the stopper 42. In the open position, the sliding door D can be stopped without self-closing.

It is a perspective view which shows the sliding door structure to which the free stop mechanism of the self-closing slide door of this invention is applied. It is a front view of the sliding door structure which shows a sliding door in the state in the middle of opening and closing. It is an external appearance perspective view of a free stop assembly. It is a disassembled perspective view of a free stop assembly. It is a perspective view which shows a free stop assembly and a door-end side suspended vehicle body in the attachment state. It is an assembly perspective view of a free stop assembly and a door end side suspended vehicle body. It is a front view of the free stop assembly which shows an operation state when a stopper exists in the tip downward inclination state. It is a front view of the free stop assembly which shows the operation state when a stopper exists in a horizontal protruding state. It is a front view of the free stop assembly which shows an operation state when a stopper exists in the tip upward inclination state. It is a front view of the free stop assembly which shows the state adjusted in the direction which strengthens the abutting with respect to the to-be-contacted part of the rotary body of a stopper. It is a front view of the free stop assembly which shows the state adjusted in the direction which weakens the abutting with respect to the to-be-contacted part of the rotary body of a stopper. It is a perspective view which shows the other sliding door structure to which the free stop mechanism of the self-closing slide door of this invention is applied. It is a perspective view which shows another sliding door structure seen from the angle different from FIG. It is a disassembled perspective view of another sliding door structure. It is a schematic front view which shows the free stop mechanism of the conventional sliding door.

Explanation of symbols

A / B Sliding door structure D Sliding door F Free stop assembly L Guide rail 15 Mounting body 20 Braking device 22 Rotor shaft 30 Rotating body 30a Rotating body gear section 30b Rotating body pressure contact section 40 Rotation control means 41 Magnet 42 Stopper 43c Abutting convex

Claims (2)

In the self-closing slide door free stop mechanism that is configured to stop the slide door that is automatically slid in the closing direction by the guide rail guide from the open position and stops at any open position during the sliding operation ,
Rotation is transmitted to the same mounting body fixed on the slide door by applying a braking force when the slide door is closed and decelerating, and meshing according to the sliding movement of the slide door. A rotating body to be rotated and a rotation control means for stopping the rotation of the rotating body,
The braking device includes a barrel that is fixed to the mounting body, and a rotor that is rotatably housed in the barrel, with a rotor shaft having a tip shaft portion protruding from the barrel as a fulcrum. A gap between the cylinders is filled with a viscous fluid and sealed in the cylinder, and formed by a rotary damper that generates a braking torque by the viscous resistance of the viscous fluid when the rotor rotates,
The rotating body has a gear portion and an annular pressure contact portion on the same shaft, and is rotatably attached to a tip shaft portion of the rotor shaft.
The rotation control means presses against the peripheral surface of the pressure contact portion of the rotating body so that the tip can be abutted from the side, and can swing on the attachment body with a support shaft on the base end side as a fulcrum. A self-closing slide door comprising: a connected magnetic stopper; and a magnet that attracts the stopper and urges the magnet in a direction perpendicular to the circumferential surface of the pressure contact portion of the rotating body at all times. Free stop mechanism. The free-stop mechanism for a self-closing slide door according to claim 1, wherein the rotation control means is capable of adjusting the abutting strength of the stopper with respect to the circumferential surface of the pressure contact portion of the rotating body.

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