JP4460554B2 - Sliding door closing device and closing mechanism having the same - Google Patents

Description

The present invention relates to a closing device for closing a sliding door type door and a closing mechanism having the same.

  Conventionally, when closing a sliding door type door body, if the force applied to the door body is too large, the door body collides against the door frame on which the door body is supported, and an impact sound is generated, I bounced and could not be completely closed. On the other hand, if the force applied to the door is too small, the door may not be completely closed and may stop halfway.

  In order to prevent the above and to close the door completely, a closing device provided with biasing means such as a spring may be used. Conversely, a shock absorber may be provided that relaxes the force that is too strong and gently closes the door. In this shock absorber, a damper or a spring for reducing an impact is attached to a door body or a door frame, and the action of the damper reduces an abrupt operation of the door body.

  In addition, there is an air cylinder that performs the same function as a shock absorber disclosed in Patent Document 1 (Japanese Patent Laid-Open No. 11-200702).

Japanese Patent Laid-Open No. 11-200702

  However, in these conventional closing devices, in the whole process from the fully open position of the door body to the fully closed position, the door body is urged in the closing direction, and this urging is used to close the door body by a person. The result was hindering movement. Moreover, in the conventional shock absorber, when the force applied to the door body is weak to close the door body, the door body stops halfway due to the biasing force of the spring or the operating resistance of the damper or the air cylinder. In some cases, it could not be completely closed.

Here, the present invention acts to completely close the door when the door is not slightly closed, and can keep the door free when the door is wide open. It is an object of the present invention to provide a sliding door closing device and a closing mechanism .

In addition to the above, the present invention can completely close the door even when the force applied to the door is weak, and conversely, if the force applied to the door is too large, It is an object of the present invention to provide a sliding door closing device and a closing mechanism that can be closed gently.

The first invention of the present application is a closing device for automatically closing a sliding door type door body 11 arranged so as to be movable in a horizontal direction with respect to the door frame 12 from a predetermined opening position to a closing position. The closing device main body S provided in one of the door body 11 and the door frame 12, the temporary fixing means 25 provided in either the door body 11 and the door frame 12, and the closing device main body S and the temporary fixing. The closing device main body S includes a rotating body 21 that rotates about a rotating shaft 21a between the open position and the closed position. The urging means 24 for applying rotational force to the rotating body 21 by urging the rotating body 21, the buffering means 23 for decelerating the rotating operation of the rotating body 21, and the casing 26 The rotating body 21 is disposed above the rotating shaft 21a. The rotating body 21 is attached to the casing 26, whereby the rotating body 21 is rotatable with respect to the casing 26, and one end of the biasing means 24 is attached to the support point 24a of the rotating body 21, The other end is attached to the casing 26, and the support point 24 a is located above the rotation shaft 21 a of the rotating body 21, and at least a part of the urging means 24. A certain straight line portion 24c extends downward from the support point 24a, and the operating body 22 is connected to the upper end of the rotating body 21. The operating body 22 has a predetermined open position and a closed position. when there is a door body 11 between a position, and connecting the closure device body S and temporary fixing means 25, have rows transmission of force between them, between the closed position and the predetermined open position Door 11 Itoki, provides closure device of the sliding door, characterized in that in which the connection between the closure device body S and temporary fixing means 25 is released.

In this invention, when the operating body 22 has the door body 11 between the open position and the closed position, either the door body 11 or the door frame 12 and the closing device body S are connected to each other. Since the force is transmitted between them, the connection is not performed in the fully opened state, and the door body 11 is in a free state. Then, when the door 11 is closed to a predetermined open position, the above-described connection is made. As a result, the closing device main body S operates and the door 11 can be automatically closed. Therefore, even when the closing force is weak, the door is completely closed by the closing device.

Moreover , since the door body 11 can be reliably closed by the urging | biasing of the urging | biasing means 24, and it decelerates by the buffer means 23, the door 11 can be closed slowly and safely.

  Here, in the present invention, the “open position” in the door body 11 refers to a position from the fully open state of the door body 11 to the state in which the operating body 22 operates, and is within this range. Although the door 11 may be in any position, it is usually desirable to set it at a position several tens of centimeters open from the closed position.

According to a second invention of the present application, in the first invention, the closing device main body S includes a switching structure, and the switching structure changes the direction of the rotational force by the urging means 24 with respect to the rotating body 21. The sliding door closing device is characterized in that it is structured to switch between two directions, ie, a direction toward the open position side and a direction toward the closed position side .

  With the above switching structure, the direction of the rotational force of the rotating body 21 generated by the biasing of the biasing means 24 can be switched depending on the position of the rotating body 21. Thereby, it is necessary to move the rotating body 21 via the operating body 22 from the open position to the switching position. However, after the switching, the rotating body 21 is urged and automatically moves to the closed position. Therefore, even when the force applied to the door 11 is weak, it can be reliably closed. In addition, since the door body 11 is decelerated by the damper 23 decelerating the rotation operation of the rotating body 21, it can be closed slowly and safely.

Further, in the third invention of the present application, in the second invention, the switching structure includes a first support point 24a for the biasing means 24 provided on the rotating body 21 side, and the rotating body 21 is in the open position. In the state of being in a neutral position which is a predetermined intermediate position between the rotating body 21 and the closed position, the rotating shaft of the rotating body 21 is placed on the biasing direction line C2 of the biasing means 24 extending from the first support point 24a. 21a can be positioned, and with the rotation of the rotating body 21, the positional relationship of the urging direction line C2 with respect to the rotating shaft 21a of the rotating body 21 is close to the opening position of the rotating body 21 and the closed position. The biasing direction of the biasing means 24 toward the rotating body 21 is changed to the opening position side and the closing position side due to the change in the positional relationship. Cut in either of two directions Providing a closure apparatus for a sliding door which is a Waru structure.

  As described above, the switching structure functions only by the rotating body 21 and the urging means 24, and a simple switching structure can be provided.

Further, according to a fourth invention of the present application, in the third invention, the door body 11 is provided with the closing device main body S, and the operating body 22 has a base end pivoted to the rotating body 21. The tip portion 22a is connected so as to be able to protrude and retract from the opening side end surface 11a of the door body 11, and the buffer means 23 is the first support point 24a provided on the rotating body 21. When moving in the direction away from the opening side end surface 11a of the door body 11, the operation of the rotating body 21 is decelerated, and when moving in the opposite direction, the operation of the rotating body 21 is not decelerated. The urging force of the urging means 24 against the rotating body 21 in a state where the rotating body 21 is closer to the open position than the neutral position causes the operating body 22 connected to the rotating body 21 to move. The closure device body S Providing a closure device of the sliding door, characterized in that it is a minimum urging force of for maintaining the state of being projected.

  As described above, the closing device can be compactly unitized by arranging the operating body 22 and the rotating body 21 so as to operate integrally.

The fifth invention of the present application provides a sliding door closing mechanism comprising the closing device according to any one of the first to fourth inventions .

1st invention of this application acts in order to close a door completely, when the door is not closed a little, and when it is large open, the closing device which can leave a door free Was able to provide.

Further , the door body can be reliably closed by the urging force of the urging means, and is decelerated by the buffering means, so that the door body can be closed slowly and safely.

In the second invention of the present application, in addition to the effect of the first invention, the urging direction of the urging means relative to the rotating body can be switched by the switching structure. As a result, the door body can be operated with the assistance of the urging means and can be reliably closed even when the force applied to the door body is weak.

In the third invention of the present application, in addition to the effect of the second invention, the first support point of the biasing means is provided on the rotating body side, and the biasing direction of the rotating body by the biasing means is in the open position. A simple switching structure can be provided by adopting a structure that switches between the two directions of the direction toward the closed side and the direction toward the closed position.

In addition, in the fourth invention of the present application, in addition to the effect of the third invention, the closing device is made compact by uniting the operating body and the rotating body so as to operate integrally. Was made.

  Hereinafter, an example of an embodiment of the present invention will be described with reference to the drawings. 1 and 2 are front views showing the closing device of this example, and FIG. 3 is a front view showing a state in which the closing device of this example is attached to the sliding door.

  In this example, the closing device 2 of the present invention has a sliding member 22, an arm 21, a damper 23, a biasing means 24, and a temporary fixing means 25 inside a casing 26. , It is embedded in the end face 11a (in the present example, the upper left end face in the figure) that is the opening side. Here, the closing device main body is formed by the arm 21, the damper 23, and the biasing means 24. And although the sliding member 22 is a rod-shaped member coordinated between the door body 11 and the frame body 12 as an operation body, in this example, it is attached in the state connected to the closure apparatus main body side. Yes.

  In the present description, the door frame 12 provided with the door body 11 refers to a rail or frame for sliding the door body 11 and the like that supports the door body, and is a sliding door 1 in a building. Includes columns and walls. In addition, the top / bottom / left / right expressions in the following description are for convenience of understanding, and the present invention should not be understood as being limited thereto.

  From the casing 26 of the closing device 2 of this example, the sliding member 22 as an operating body for the arm 21 is formed so as to protrude. The sliding member 22 is located between the door body 11 and the door frame 12 and is used to move an arm 21 described later. When the door body 11 is opened, the sliding member 22 starts from the end surface 11a of the door body 11. At the time of closing and closing, it is immersed inside the casing 26, that is, in the end face 11a of the door, and operates in the horizontal direction.

  In this example, the left end portion of the elongated steel plate is bent at a right angle, but the shape of the sliding member 22 is not limited to that of this example, and can be implemented in various forms such as a round bar shape and a pencil shape. Is possible. In the sliding member 22 of this example, the front end portion 22a which is the bent left end portion is a coupling portion to which a magnet of a temporary fixing means 25 described later is attracted. Further, a connecting projection 22b as a connecting portion with respect to the arm 21 protrudes from the right end in the figure.

  The dimensions of the sliding member 22 protruding between the end surfaces 11a and 12a of the door body 11 and the door frame 12 are not particularly limited, and the sizes of the door body 11, the door frame 12, the arm 21 and the like are not limited. It may be formed to the dimension that operates most smoothly in accordance with the thickness, but specifically, the desired dimension is 5 to 30 cm. The opening position of the door 11 is also determined by the dimensions of the sliding member 22.

  The arm 21, which is a rotating body, is attached to the casing 26 via a rotating shaft 21a, and can rotate within a predetermined range about the rotating shaft 21a. In this example, the rotation range of the arm 21 is fan-shaped, and the left end in the figure is an open position, and the right end in the figure is a closed position, which correspond to the open position and the closed position of the door body 11, respectively.

  The arm 21 is provided with a stopper for restricting the rotation range, if necessary. This stopper may also serve as the casing 26. In this example, the rotation range of the arm 21 is determined by the long hole 21b of the arm 21 and the connection protrusion 22b of the sliding member 22, and these function as a stopper.

  In this example, the arm 21 is also in the shape of an elongated bar made of a steel plate, like the sliding member 22. A long hole 21b is formed at the tip in parallel with the center line of the arm. In addition, the shape of the arm 21 is not limited to that of the present example, and can be implemented in various forms.

  The connecting rod 22 and the arm 21 are rotatably and slidably connected to the elongated hole 21b by arranging the connecting projection 22b provided on the sliding member 22 as described above. That is, it is possible to connect the arm 21 and the sliding member 22 while allowing an angle change, and the arm 21 operates in a fan shape as the sliding member 22 moves in the horizontal direction.

  The damper 23 decelerates the operation of the arm 21 when the arm 21 moves in the direction from the open position to the closed position, that is, in this example, to the right in the figure. In this example, the damper 23 has a circular shape. It is directly attached to the arm 21 so that the moving shaft 21a is at the center. The damper 23 incorporates a one-way clutch. In this example, the damper 23 decelerates when the arm 21 moves to the right in the figure, and does not decelerate when it moves to the left in the figure. Thereby, when the sliding member 22 connected to the arm 21 is pushed into the inside of the closing device main body, the sliding member 22 is pushed slowly, so that the gap between the end surface 11a of the door body and the end surface 12a of the door frame gradually increases. It narrows. Therefore, the door body 11 is prevented from suddenly colliding with the door frame 12.

  The damper 23 used in the present invention may have any form as long as the damper 23 is decelerated by being connected to the arm 21. Therefore, it is not limited to the circular shape as in this example, and a device that operates in a linear direction may be used. Moreover, you may connect indirectly with respect to the arm 21 via a gear, a link, etc.

  The urging means 24 urges the arm 21 so that the rotational force acts on the rotation shaft 21a. In this example, a coil spring is used as the urging means 24. However, the present invention is not limited to this, and a spring other than the coil spring or an elastic resin such as rubber may be used.

  In this example, as shown in FIGS. 1 and 2, the urging means 24 is arranged in a V shape in front view through a pulley 24d, but this is housed in the casing 26 in a compact manner. Therefore, the entire coil spring 24 may be arranged linearly.

  By this urging means 24, turning force acts on the arm 21 around the turning shaft 21 a, and the turning direction of the arm 21 by the turning force depends on the position of the arm 21 in the illustrated left direction and the illustrated right direction. The two directions are changed. A structure for changing this direction will be described. Here, the part which mainly acts on the change of the rotation direction with respect to the arm 21 is a left part of the urging means 24 arranged in a V shape, specifically, the upper left in the figure of the urging means 24. It is a straight line portion connecting the end and the left end of the pulley 24d. This part is referred to as an action part 24c and will be described below.

  The upper end of the action portion 24c is fixed at the first support point 24a located slightly closer to the proximal end of the distal end portion of the arm 21, in this example, the long hole 21b. Moreover, the lower end of the action part 24c is located in the 2nd support point 24b which is the left side surface of a pulley, and the rotating shaft 21a is located between both fulcrum points 24a and 24b.

  The angle of the center line C2 of the action portion 24c with respect to the center line C1 of the arm 21 is changed by the rotation of the arm 21. Specifically, as shown in FIG. 1, when the arm 21 is in the open position, the center line C1 of the arm 21 (a line passing through the first support point 24a and the rotating shaft 21a) and the center of the action portion 24c. With respect to the line C2 (the line passing through the first support point 24a and the second support point 24b), the center line C2 of the action portion 24c is located closer to the open position (left side in the drawing) than the center line C1 of the arm 21. Is coordinated to do.

  As a result, the center line C1 of the arm 21 and the action portion 24c at an angle (referred to as neutral position) as the tip of the arm 21 moves from the open position (left side in the figure) to the close position (right side in the figure). When the center line C2 coincides with the center line C2 and the neutral position is exceeded, the center line C2 of the action portion 24c is positioned to the right of the center line C1 of the arm 21, as shown in FIG. From the above, when the distal end portion of the arm 21 is located on the left side of the figure with respect to the neutral position, the arm 21 is biased to the left, whereby the rotational force works in the left direction, and conversely, the arm 21 is neutral. When located on the right side of the figure from the position, the arm 21 is urged to the right, so that the rotational force works in the right direction. Incidentally, the coil spring 24 extends most at the neutral position.

  In other words, when the pivot shaft 21a is located on the right side of the center line C2, the arm 21 is biased to pivot leftward, and when the pivot shaft 21a is on the center line C2, the arm 21 is in the neutral position. The urging force does not act for the rotation of the arm 21. When the rotation shaft 21a is on the left side of the center line C2, the arm 21 is urged to rotate in the right direction.

  As shown in FIG. 1, when the biasing force of the coil spring 24 on the arm 21 in the state to the left of the neutral position is too strong, the door 11 is moved to bring the arm 21 to the neutral position. Since a large force is required when moving, it is desirable to set the minimum biasing force for maintaining the state in which the sliding member 22 is protruded.

  As described above, when the distal end portion of the arm 21 is moved from the left side to the neutral position in the drawing, it is necessary to apply an external force to the arm 21 via the sliding member 22, but when the neutral position is exceeded, the coil spring 24 By urging, the arm 21 automatically moves to the right in the figure. Therefore, since the external force applied to the arm 21 via the door 11 and the sliding member 22 is only a force from the left side to the neutral position in the drawing, a force enough to slowly close the door 11 is sufficient. The door can be reliably closed even with a weaker force than before.

  Since the damper 23 is attached to the arm 21 as described above, even when the coil spring 24 is urged, the movement of the arm 21 to the right in the drawing is performed while decelerating, and the door suddenly The body 11 never closes.

  The temporary fixing means 25 serves as a contact portion for the sliding member 22 and temporarily fixes the sliding member 22 to the door frame 12. In this example, the magnet embedded in the plate is attached to the portion of the door frame 12 that contacts the end surface 11a of the door body 11 as shown in FIG. Thereby, the front-end | tip part 22a of the sliding member 22 can be adsorb | sucked to the magnet of the temporary fixing means 25. FIG.

  When the door 11 moves from the open position to the closed position, when the tip 22a of the sliding member 22 contacts the temporary fixing means 25, the adsorption force between the sliding member 22 and the temporary fixing means 25 Is stronger than the urging force of the urging means 24 against the arm 21, so that the arm 21 moves while maintaining the state where the sliding member 22 is attracted to the temporary fixing means 25. Along with this, the door body 11 is attracted to the door frame 12 so that the door body 11 can be completely closed, and even when the external force for closing the door body 11 is weak, the door body 11 is operated reliably. Can do.

  Further, even when the door 11 is opened, the tip 22 a of the sliding member 22 remains in a state where it is attracted to the magnet of the temporary fixing means 25. Therefore, the sliding member 22 is pulled along with the movement of the door 11 in the opening direction, and the arm 21 rotates from the closed position (right side in the figure) to the open position (left side in the figure). Eventually, the arm 21 moves to the leftmost position and cannot move any further, so that the tip 22a of the sliding member 22 is separated from the temporary fixing means 25 at this point.

  Here, since the arm 21 is located on the left side of the drawing with respect to the neutral position, the biasing means 24 biases the sliding member 22 in the direction of projecting through the arm 21. Therefore, the sliding member 22 does not return to the original state, and the state in which the sliding member 22 remains protruding from the closing device 2 is maintained.

  As described above, when the door 11 is opened from the closed position, the temporary fixing means 25 is connected to the operating body 22 from the closed position to the open position, and thus the arm 21 connected to the sliding member 22. Is reliably returned to the open position.

  The temporary fixing means 25 may be one in which a magnet is coordinated to the tip of the sliding member 22 contrary to the one shown above. In addition, the sliding member 22 and the temporary fixing means 25 are provided so as to be able to be fitted by a combination of a protrusion and a receiving portion such as a recess, and the sliding member 22 and the temporary fixing means 25 are in contact with each other. In this case, the protrusion and the receiving portion are fitted, and when the door 11 is opened, the fitting is released after the sliding member 22 is pulled out with the movement of the arm 21. Even with such a structure, it is possible to achieve the same operation as the structure using the magnet as in this example. In addition, a detachable locking structure using a spring can be employed. The temporary fixing means 25 can be disconnected from the sliding member 22 and the urging means 24 can be attached. It is possible to carry out with various structures on condition that the connection with the sliding member 22 is maintained with a force stronger than the force and that the person can be separated with a force to move the door body 11.

  Further, the sliding member 22 of this example is configured to operate integrally with the arm 21 by connecting the elongated hole 21b formed in the arm 21 as described above and the connection protrusion 22b. As a result, the closing device can be compactly unitized.

  In this embodiment, the sliding member 22 (that is, the operating body) is provided in the connection device main body S, and the connection device main body S is attached to the door body 11, and the sliding member 22 and the door frame 12 are connected. It can be implemented by providing the temporary fixing means 25 between them (see FIG. 4A). Conversely, the connection device main body S may be attached to the door frame 12 and the temporary fixing means 25 may be provided between the sliding member 22 and the door body 11 (see FIG. 4B). 4A and 4B, the temporary fixing means 25 is provided on the door body 11 or door frame 12 side and is not provided on the sliding member 22 side, but the temporary fixing means 25 is provided on the sliding member 22 side. It may be provided on both sides or on both sides.

  Further, the present invention is not limited to the one connected to the arm 21 as described above, and the sliding member 22 is provided separately from the closing device main body, for example, the sliding member 22 so as to protrude from the door frame 12. Is formed in a fixed state, and a part of the arm 21 of the closing device body provided in the door body 11 abuts against a part of the sliding member 22 (not limited to the distal end portion 22a). The arm 21 may be moved. In this case, the temporary fixing means 25 is provided on at least one of a part of the sliding member 22 and a part of the arm 21 which are parts that contact each other in this way.

  That is, as shown in FIG. 4C, the sliding member 22 (that is, the operating body) may be provided on the door frame 12 and the connecting device main body S may be provided on the door body 11. Conversely, the connection device main body S may be attached to the door frame 12 and the sliding member 22 may be attached to the door body 11 (FIG. 4D). In these cases, the temporary fixing means 25 is provided between the sliding member 22 and the connection device main body S, and any of them may be provided as in the example of FIGS. .

  When this closure device 2 is attached to the door body 11, it is not limited to the one embedded in the end surface 11 a of the door body 11 as in this example, and may be attached to the surface of the door body 11. By carrying out like this, this closing device 2 can be easily attached with respect to the normal door 11 without the closing device 2 by retrofit.

  Further, the sliding member 22 may be provided on the upper part of the door body 11 or the door frame 12 and may be hidden on the rail portion. In addition, the sliding member 22 can be changed to various forms as an operating body, and is provided as a rotating member that rotates instead of sliding, and the operating body is operated by the movement of the rotating portion. Also good.

It is a front view which shows the state which removed a part of casing in the closing device of this example at the time of opening of a door. It is a front view which shows the state which removed a part of casing in the closing device of this example at the time of closing of a door. It is a front view which shows the state which attached the closing device of this example to the sliding door. (A)-(D) is explanatory drawing which shows the attachment aspect of a closing device, respectively.

1 Sliding door 11 Door 11a Open side end face (door)
12 Door frame 12a Open side end face (door frame)
2 Closing device 21 Rotating body, arm 21a Rotating shaft 22 Actuating body, sliding member 22a Actuating body, tip of sliding member 23 Buffering means, damper 24 Energizing means 24a First supporting point 24b Second supporting point 25 Temporary Fixing means C2 Energizing direction of energizing means

Claims (5)

In a closing device for automatically closing a sliding door type door body (11) arranged so as to be movable in a horizontal direction with respect to the door frame (12) from a predetermined opening position to a closing position,
A closing device body (S) provided on either the door body (11) or the door frame (12);
A temporary fixing means (25) provided on either the door body (11) or the door frame (12);
An actuating body (22) arranged between the closure device body (S) and the temporary fixing means (25) ,
The closing device body (S) includes a rotating body (21) that rotates about the rotating shaft (21a) between the open position and the closed position;
Urging means (24) for applying rotational force to the rotating body (21) by urging the rotating body (21);
Buffer means (23) for decelerating the rotation of the rotating body (21) ;
A casing (26),
The rotating body (21) is attached to the casing (26) via the rotating shaft (21a), whereby the rotating body (21) is rotatable with respect to the casing (26). Has been
The biasing means (24) has one end attached to the support point (24a) of the rotating body (21) and the other end attached to the casing (26).
The support point (24a) is located above the rotation axis (21a) of the rotation body (21),
The straight portion (24c) which is at least a part of the biasing means (24) extends downward from the support point (24a),
The operating body (22) is connected to the upper end of the rotating body (21),
When the door (11) is between the predetermined open position and the closed position , the operating body (22) connects the closure device body (S) and the temporary fixing means (25) , There line force transfer therebetween,
When there is no door (11) between the predetermined open position and the closed position, the connection between the closure device main body (S) and the temporary fixing means (25) is released. Sliding door closure device. The closing device body (S) has a switching structure,
Said switching structure, a direction of the rotational force by said biasing means (24), and the direction to said rotation body opening position side (21), cut into one of two directions with the direction to the closed position side characterized in that it is a conversion obtain structure, the closure device of the sliding door according to claim 1. The above switching structure, the first support point for the biasing means (24) and (24a) provided on the rotating body (21) side,
In a state where the neutral position is a predetermined intermediate position between said rotating body (21) is a closed position and the open position, the first support point urging of the biasing means extending from (24a) (24) on direction line (C2), it can be positioned above times rotation axis of the body (21) and (21a),
With the rotation of the rotating body (21), the positional relationship of the rotating body rotation axis (21) the biasing direction line with respect to (21a) (C2) is an open position toward the rotating body (21) It is supposed to change to either the closed position,
The change in the positional relationship, the times urging direction of the body (21) of the biasing means (24), the direction to the open position side, either two directions between the direction to the closed position side The sliding door closing device according to claim 2 , wherein the sliding door closing device has a structure that switches to the above. To the door body (11) the closure device body (S) is provided,
Additional operating body (22) is proximal end pivotably connected to said rotating body (21), retractable in distribution tip (22a) from the opening side end face of the door body (11) (11a) That was ranked
It said buffer means (23), in the case where the rotating body (21) to provided the aforementioned first support point (24a) is moved in a direction away from the opening-side end face of the door body (11) (11a), The operation of the rotating body (21) is decelerated, and the movement of the rotating body (21) is not decelerated when moving in the opposite direction.
The said rotating body (21) is in the state in an open position side from the neutral position, the times biasing force against body (21) of the biasing means (24), connected to said rotating body (21) wherein the actuating body (22) is a minimum urging force of for maintaining a state of protruding from the closure device body (S), the closure device of the sliding door according to claim 3. 5. A sliding door closing mechanism comprising the closing device according to claim 1 .

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