JP5123995B2 - Door closing device - Google Patents

Description

The present invention relates to a closing device for closing a sliding door type door.

Japanese Patent Laid-Open No. 11-200702 Japanese Examined Patent Publication No. 61-10631

Conventionally, when closing the sliding 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. Bound and could not be completely closed. On the other hand, when the force applied to the door is too small, the door may not be completely closed and may stop halfway.

Here, in order to completely close the door, a closing device provided with biasing means such as a spring may be used.
In addition, there may be provided a shock absorber that relaxes an excessively strong force and gently closes the door. These shock absorbers are provided with dampers and springs for mitigating impacts attached to doors and door frames, and abrupt movements of the doors are mitigated by the action of the dampers and the like.
Moreover, there exists a thing which makes the same effect | action by an air cylinder like the buffering device shown by patent document 1. FIG.

However, in the conventional closing device, the door body is urged in the closing direction in the entire process from the fully open position to the closed position of the door body, and this urging causes the movement of the door body to be closed by a person. Inviting consequences. 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, as an example of a conventional closing device, there is an invention “automatic door closing device” described in Patent Document 2. This can automatically close the door by holding the L-shaped lever provided on the door with respect to the metal fitting provided on the door frame. This L-shaped lever is provided so as to be rotatable with respect to the door, and can be rotated while decelerating the L-shaped lever by being connected to a dashpot that is a hydraulic cylinder with a built-in spring. .

However, the closing device according to the present invention changes the positional relationship between the axis of the dashpot and the rotation center of the L-shaped lever halfway, and switches the pulling direction of the dashpot with respect to the L-shaped lever. Since the doors are fixed at positions corresponding to the open position and the closed position of the door, there are problems that the mechanism is complicated and that high working accuracy is required for reliable operation.
The dashpot is a hydraulic cylinder with a built-in spring, and has a problem that it needs to be designed as a dedicated product for the closing device.
Due to the above problems, it is difficult to reduce the manufacturing cost in the structure of the closing device described in Patent Document 2.

Here, the present invention acts to completely close the door when it is slightly opened in the state immediately before the door is completely closed, and when the door is largely opened, the door is left in a free state. It is an object of the present invention to provide a closing device that can be used.
Moreover, even if the external force applied to the door body is weak, the present invention can completely close the door body, and conversely, when the external force is strong, the door body can be buffered and gently closed. It is an object of the present invention to provide a sliding door closing device.
Moreover, this invention makes it a subject to provide the closing device of the sliding door which can contribute to reduction of manufacturing cost by setting it as a simple structure.

The present invention relates to a door closing device capable of automatically closing a sliding door type door body 11 arranged to be openable and closable with respect to a door frame 12 while the door body 11 exists from a predetermined open position to a closed position. Regarding improvement. The door frame 12 of the door closing device according to the present invention is provided with a temporary fixing means 25, and the door 11 is provided with a closing device body 2a. The closing device main body 2a corresponds to the opening position O corresponding to the opening position of the door body 11 before the automatic closing operation starts and the closing position of the door body 11 around the rotation shaft 21a. An arm 21 rotatable within a range between the closed position C and a biasing means 23 for biasing the arm 21 so that the arm 21 rotates from the open position O to the closed position C; When the arm 21 rotates from the open position O to the closed position C, a buffer means 24 is provided for decelerating the rotation operation of the arm 21.

The buffer means 24 is a direct acting damper 24 having a movable rod 24a, and the temporary fixing means 25 can hold the fixing portion 21b, which is a part of the arm 21, so as not to move in the left-right direction. When the door 11 is automatically closed, the fixing portion 21b is held by the temporary fixing means 25, and the arm 21 is rotated by the urging force of the urging means 23 in this state. As a result, the door 11 is closed.

The temporary fixing means 25 includes a first wall 25a, a second wall 25b positioned closer to the opening side of the door 11 than the first wall 25a in the opening / closing direction of the door 11, and a first wall 25a The arm fixing groove 25c is opened downward so as to be sandwiched between the second wall 25b. In the door closing device of the present invention, when the arm 21 moves from the normal open position and the movable rod 24a is about to be pulled out beyond the limit, It is characterized by having an open side stopper 22a that prevents the arm 21 from moving any further by contact.

In the door closing device according to the present invention , when the door 11 is in a predetermined open position, that is, in a state immediately before the door 11 is completely closed in the process of closing the door 11, the door 11 is Acts to close.

On the other hand, when the door body 11 is greatly opened, the door body 11 can be left in a free state.

And, since the arm 21 is rotated by the urging force of the urging means 23 while the fixing portion 21b of the arm 21 is held by the temporary fixing means 25, even if the external force applied to the door body is weak, The door 11 can be reliably closed, and at that time, the arm 21 is rotated by being decelerated by the buffering means 24. Therefore, even if the external force is strong, the door 11 can be slowly and safely. It was able to be closed.

Here, as shown in FIG. 7, if the closure device main body 2 a and the temporary fixing means 25 are arranged closer to each other in the vertical direction than that shown in FIG. 2, the temporary fixing means 25. When the arm 21 moves to the left in the figure while the fixing portion 21b of the arm 21 is in contact with the right lower wall 25d, the arm 21 is moved to the left from the normal open position O. As described above, if the movable rod 24a is pulled out beyond the limit, the damper 24 may be damaged. Even in such a case, according to the present invention, since the arm 21 is provided with the open-side stopper 22a that prevents the arm 21 from moving further by contacting a part of the arm 21. It is possible to prevent the movement as described above and to prevent the occurrence of a failure.

Hereinafter, an example of an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a front view showing a state in which the door closing device of this example is attached to a sliding door, and FIGS. 2 to 6 are explanatory views showing the structure and operation of the door closing device of this example.

The closing device 2 of this example has a structure as shown in FIG. 2 and includes an arm 21, an urging means 23, a damper 24, and a temporary fixing means 25.

Among them, the arm 21, the urging means 23, and the damper 24 are provided inside the casing 22, and constitute the closing device body 2a. In this example, the closing device main body 2a is embedded in the upper surface 11b of the door body 11 on the side close to the opening side end surface 11a. In addition, when using it for the upper hanging door of the structure which provided the doorwheel in the upper part of the door body 11, since the doorwheel is provided in the side near the opening side end surface 11a of the upper surface 11b of the door body 11, the door body 11 is provided with a closing device body 2a.
In the present description, the door frame 12 provided with the door body 11 refers to a support for the door body 11 such as a rail or a frame for arranging the door body 11 so as to be movable in the left-right direction. In the case of a sliding door in a building, it includes columns and walls.
In addition, the expression of the direction in the present description is for the purpose of facilitating understanding, and the present invention should not be understood as being limited thereby.

The arm 21 is attached to the casing 22 via a rotating shaft 21 a provided on the base end side (the lower end side in the drawing) so that the upper end protrudes from the casing 22. The arm 21 in this example is formed by overlapping two opposing plate-like bodies (not shown).
The arm 21 is rotatable within a predetermined range in the left-right direction around the rotation shaft 21a. In this example, the left end of the rotation range of the arm 21 is the open position O (the state shown in FIG. 2), and the right end is the closed position C (the state shown in FIG. 6). In this example, the position in the state where the door 11 is moved relatively to the right in each figure) and the closed position (in this example, the position where the door 11 is moved relatively to the left in each figure). Corresponding to. That is, with reference to the position of the rotating shaft 21a, the open position O is when the tip (upper end in the figure) of the arm 21 is on the left side in the figure, and the closed position C is when it is on the right side.
It should be noted that the arm 21 can move further to the left than the open position O as shown in FIG. 7 according to the positional relationship with the temporary fixing means 25.

In this example, a cylindrical fixing portion 21b is formed on the distal end side (the upper end side in the figure) of the arm 21 so as to be sandwiched between two opposing plate-like bodies constituting the arm 21. The fixing portion 21b is held in the temporary fixing means 25 provided in the door frame 12, specifically, the arm fixing groove 25c in the temporary fixing means 25, so that the door body 11 is automatically closed. Can do.
Note that the fixed portion 21b in this example includes a shaft portion 21b1 and a roller portion 21b2 that is disposed outside the shaft portion 21b1 and is rotatable with respect to the shaft portion 21b1. As described above, when the fixing portion 21b is arranged in the arm fixing groove 25c of the temporary fixing means 25, the roller portion 21b2 can rotate with respect to the left wall 25a and the right wall 25b of the temporary fixing means 25. Therefore, the fixed portion 21b can move up and down with a small resistance.
The shape of the arm 21 is not limited to that of this example, and for example, as shown in FIGS. 9 to 12, various forms can be implemented. In this example, the upper end of the arm 21 is the fixed portion 21b. However, the fixed portion 21b may be formed at a location other than the upper end, such as in the middle of the arm 21.

In this example, the arm 21 has a curved shape as shown in the figure for the purpose of reducing the relationship between the operating range of the biasing means 23 and the damper 24 and the closing device body 2a. . Specifically, in the state shown in FIG. 2, the base end portion 21x that extends from the base end side (lower end side in the drawing) to the upper left side and the arm 21 that continues to the tip end side of the base end portion 21x. The intermediate portion 21y is a portion curved toward the outside of the operating range (the left side in the figure), and the tip portion 21z is continuous to the tip side with respect to the intermediate portion 21y and extends to the upper left again. The base end portion 21x is provided with the rotation shaft 21a as described above. Further, a biasing means 23 described later is connected to the intermediate portion 21y via a biasing means mounting portion 21c, and a damper 24 described later is connected via a damper mounting portion 21e. Further, the fixed portion 21b is provided at the tip portion 21z.

The arm 21 is provided with an engaging portion 26a. This engaging part 26a is a recessed part provided in the arm 21 in this example. Specifically, this is a recess provided in the resin-made engagement piece 26 which is arranged so as to be sandwiched between two opposing plate-like bodies constituting the arm 21. The shape of the engaging portion 26a is made to coincide with a curved portion 27a of an arm position holding means (plate spring) 27 described later. In addition, the engagement piece 26 of this example is a member different from the arm 21, but it is formed integrally with the arm 21 from the beginning, or formed by bending a part of the arm 21. There may be various modifications, which can be implemented as long as it engages with the arm position holding means 27 described below and can hold the position of the arm 21.

On the other hand, an arm position holding means 27 is provided in the casing 22 as a part corresponding to the engaging portion 26a. As shown in FIG. 2, when the arm 21 is in the open position O, the arm holding means 27 engages the engaging portion 26a of the arm 21 with the bending portion 27a that is a part of the arm position holding means 27. The position of the arm 21 can be held in the open position O.

The arm position holding means 27 is a leaf spring 27 in this example, and a base end side (lower end side in the drawing) is fixed to the casing 22. The fixed position of the leaf spring 27 with respect to the casing 22 is outside the open position O (the left side in the figure) in the operating range of the arm 21.
The leaf spring 27 has a curved portion 27 a formed so as to protrude toward the arm 21. As shown in FIG. 2, the specific shape of the leaf spring 27 in the present example is as follows. It is bent to the upper left after being once bent to the right at the tip end side, and this folded portion becomes a curved portion 27a. As shown in FIG. 2, the curved portion 27 a can be engaged with an engaging portion 26 a that is a concave portion formed in the arm 21.
As shown in FIG. 5, the leaf spring 27 is in contact with the leaf spring stopper 22c provided on the casing 22 when not engaged with the arm 21, but as shown in FIG. In a state where the arm 21 is in the open position O, the arm 21 is pushed up by the arm 21 and deformed away from the leaf spring stopper 22c. At this time, the engaging portion 26a of the arm and the bending portion 27a of the leaf spring 27 are engaged. Since the leaf spring 27 is deformed as described above, an urging force is generated, so that the arm 21 can be reliably held at the open position O. Note that the direction of the urging force of the leaf spring 27 may be a direction that intersects the rotation direction of the arm 21, but the direction in which the urging force is applied toward the opening direction of the arc that is the rotation direction of the arm 21. However, it is desirable because the engagement state between the arm 21 and the leaf spring 27 is not easily released.

In this example, as shown in FIG. 2, when the arm 21 is in the open position O, the pivot shaft 21a of the arm 21 and the virtual axis passing through the center of the urging means 23 are approximately one in the vertical direction. I'm doing it. Therefore, the arm 21 in this state is in a neutral state that is not biased by the biasing means 23, and only the biasing force of the leaf spring 27 is applied to the arm 21. Therefore, the engagement between the curved portion 27 a of the leaf spring 27 and the engaging portion 26 a of the arm 21, which is performed as described above, causes the fixing portion 21 b of the arm 21 to be in contact with the temporary fixing means 25 as the door body 11 moves. Until it comes into contact with the left wall 25a (see FIG. 4), it is difficult to come off unless other external force is applied.

Each form of the position holding portion 26a and the arm position holding means 27 is not limited to this example as long as the arm 21 can be held at the open position O, and various modifications can be made. Can do. For example, as shown in FIG. 9, the arm position holding means 27 has a contact portion 27b at one end and a hook portion 27c at the other end, and the closing device is between the contact portion 27b and the hook portion 27c. It is assumed that the fulcrum 27d is rotatably supported by the main body 2a, and the abutting portion 27b, the hooking portion 27c, and the fulcrum 27d are substantially V-shaped in a triangular positional relationship. It is also possible that the hook portion 27b can hold the position holding portion 21d of the arm 21 and hold the position of the arm 21 when is at the open position O.
Further, as shown in FIG. 10A, the position holding portion 21e is a plate-like one provided with a fitting convex portion 21e1 provided so as to protrude to the left side of the arm 21, and the arm position holding means 27 is provided. When the arm 21 is in the open position O, the fitting projection 21e1 of the arm 21 and the arm position holding means 27 are fitted when the arm 21 is in the open position O. By fitting the recess 27e as shown in FIG. 10B, the position of the arm 21 may be maintained as it is against the urging force of the urging means 23. In addition, the arm position holding means 27 may be provided with a magnet, and the arm 21 may be held by attracting a part of the arm 21 to the arm position holding means 27 with a magnetic force.

The urging means 23 urges the arm 21 to rotate from the open position O toward the closed position C around the rotation shaft 21a. In this example, a coil spring is used as the urging means 23, and urging is performed using a tensile force. One end side 23 a of the urging means 23 is attached to the casing 22, and the other end side 23 b is attached to the urging means attaching portion 21 c of the arm 21.
In this example, as shown in FIG. 2, the urging means attaching portion 21 c is provided near the base end of the arm 21, but the method of attaching the urging means 23 to the arm 21 is described in this example. It is not limited to those. For example, what is shown in FIGS. 9 to 11 is one in which the urging means mounting portion 21 c is provided near the tip of the arm 21. Further, in FIG. 12, the urging means mounting portion 21c is provided on the base end (lower end in the drawing) side with respect to the rotation shaft 21a. This is provided on the left side of the arm 21 in the figure. In this way, various modifications can be made.
Further, the urging means 23 is not limited to the coil spring as in this example, and other types of springs such as a spiral spring attached to the rotating shaft 21a, or an elastic resin such as rubber is used. You may use and the place to attach is not limited. In contrast to this example, the compression force of the spring may be used.
Further, as shown in FIG. 8, by providing a position adjusting means 28 on one end side of the urging means 23, the tensile force and the compressive force possessed by the urging means 23 may be made variable. In the figure, a coil spring 23 is attached via a plate 28a, and the displacement of the coil spring 23 relative to the casing 22 can be adjusted by a bolt 28b and a nut 28c screwed to the plate 28a. Is. By doing so, the moving speed of the arm 21 can be adjusted, and the closing speed of the door 11 can be adjusted accordingly.

The damper 24 is a buffer means for decelerating the operation of the arm 21 when the arm 21 rotates in the direction from the open position O toward the closed position C. In this example, a direct-acting damper is used as the damper 24, and the damper 24 is provided on the damper mounting portion 21 e of the arm 21 located on the tip side of the biasing means mounting portion 21 c. The tip of the movable bar 24 a is connected, and force is transmitted between the arm 21 and the damper 24. In addition, the damper attachment part 21e in this example is a position relatively close to the rotation shaft 21a, and the movement distance of the damper contact part 21e can be made relatively smaller than the case where it is provided at a position far from the rotation shaft 21a. Therefore, the damper 24 having a small operation range (movement range of the movable rod 24a) can be used.

As will be described later, the fixing portion 21b which is the tip of the arm 21 is held in the arm fixing groove 25c of the temporary fixing means 25 provided in the door frame 12, as shown in FIG. By being urged to be pulled by the urging means 23, the arm 21 moves toward the closed position C. At this time, first, as shown in FIG. 5, the fixing portion 21b moves to the back side (upward in the drawing) of the arm fixing groove 25c, and from this state to the state shown in FIG. 6, the door body to which the closing device main body 2a is attached. 11 moves along the door frame 12 and is closed. At the time of closing, the rotational movement from the open position O (left side in the figure) of the arm 21 to the closed position C (right side in the figure) is decelerated by the buffering action of the damper 24. It is decelerated and the end surface 11a of the door body 11 does not suddenly collide with the end surface 12a of the door frame 12, and can be reliably closed. Moreover, since the arm 12 does not move suddenly by the damper 24, the door body 11 does not bounce against the door frame 12.

In this example, as shown in FIG. 2, the damper abutting portion 21 e is provided so as to be adjacent to the distal end side of the urging means attaching portion 21 c at the base end portion 21 x of the arm 21. The method of attaching the damper 24 to the arm 21 is not limited to this example. For example, as shown in FIGS. 9 to 11, the movable rod 24 a may not be directly connected to the arm 21, and may transmit force by contacting a part of the arm 21. . Further, as shown in FIG. 12, a damper abutting portion 21e may be provided on the distal end side of the arm 21, and a movable rod 24a may be connected to the damper abutting portion 21e. Further, it may be indirectly connected to the arm 21 through a gear, a link, or the like, and can be implemented with various changes. Further, similarly to the urging means 23 described above, the closing speed of the door body 11 can be adjusted by making the shock absorbing capacity adjustable for the damper 24 as well.

The damper 24 used in the present invention may have any form as long as it is connected to the arm 21 and decelerates the operation of the arm 21. For example, a circular damper (rotary damper) may be directly attached to the arm 21 so that the rotation shaft 21a is the center.
Further, the damper 24 may be one that exhibits a buffering action when the arm 21 moves in either the left or right direction, or has a built-in one-way clutch, and the arm 21 moves to the closed position C. It may be decelerated when moving (to the right) and not decelerated when moving to the open position O (to the left).

The temporary fixing means 25 is a metal fitting attached to the door frame 12 in this example, and is for temporarily fixing the arm 21 to the door frame 12. In this example, as shown in FIG. 2, the arm fixing groove 25c is opened downward so as to be sandwiched between the left wall 25a and the right wall 25b.
The lower right wall 25d formed on the lower surface of the temporary fixing means 25 and on the right side of the arm fixing groove 25c is higher than the lower left wall 25e, which is the lower surface on the left side of the arm fixing groove 25c. Is formed. This is because the fixing portion 21b of the arm 21 passes under the right lower wall 25d and is introduced into the arm fixing groove 25c as shown in FIG. When the fixing portion 21b of the arm 21 passes below the lower right wall 25d, the fixing portion 21b abuts on the lower right wall 25d as shown in FIG. 3 in this example. You may make it keep. Further, in this example, the right lower wall is provided so that the vertical displacement between the closing device body 2a and the temporary fixing means 25 can be absorbed and the fixing portion 21b of the arm 21 can be smoothly introduced into the arm fixing groove 25c. On the right side of 25d in the figure, an upward inclined slope 25f is formed. FIG. 7 shows a case where the closing device main body 2a and the temporary fixing means 25 are arranged closer to each other in the vertical direction than that shown in FIG. The fixing portion 21b of the arm 21 is guided to the arm fixing groove 25c while being in contact with the introduction slope 25f.

Here, as shown in FIG. 7, when the closing device main body 2a and the temporary fixing means 25 are arranged closer to each other in the vertical direction than that shown in FIG. When the arm 21 moves to the left in the figure while the fixing portion 21b of the arm 21 is in contact with 25d, the arm 21 is moved to the left from the normal open position O. Therefore, the movable rod 24a of the damper 24 is pulled out more than the state shown in FIG. If the movable rod 24a is pulled out beyond the limit, the damper 24 will be damaged. Therefore, the casing 22 is provided with an open side stopper 22a, and a part of the arm 21 abuts against the open side stopper 22a, thereby preventing the arm 21 from moving further. In this example, a part of the casing 22 on the left side of the figure also serves as the open side stopper 22a, but the casing 22 may be provided with other members.
Further, in the same manner as described above, the closing side stopper 22b is provided so that the arm 21 moves to the right in the drawing from the normal closing position C and the damper 24 does not break down. In this example, the upper right portion of the casing 22 in the drawing is extended to the left side of the drawing, and the tip portion thereof also serves as the closing side stopper 22b.

Next, the operation of the closing device 2 associated with the opening / closing operation of the door body 11 will be described.
As the door body 11 moves from the open position to the closed position, the arm 21 moves from the state shown in FIG. 2 to the right lower wall 25d of the temporary fixing means 25 as shown in FIG. As shown in FIG. 4, the fixed portion 21 b is arranged in the arm fixing groove 25 c of the temporary fixing means 25 through the state where the fixed portion 21 b is in contact. Here, since the door body 11 provided with the closing device main body 2a tries to move further to the closed position (left side in the figure), the fixing portion 21b of the arm 21 collides with the left wall 25a of the temporary fixing means 25. It becomes. Thereby, the engagement between the curved portion 27a of the leaf spring 27 and the engaging portion 26a of the arm 21 is released. Further, the arm 21 moves to the closed position C side (right side in the figure) by the leftward movement of the door body 11 in the figure. In this state, the imaginary axis passing through the center of the urging means 23 moves upward from the rotation shaft 21a of the arm 21, so that the urging force of the urging means 23 acts on the arm 21, and the arm 21 is in the open position O. Starts to turn to the closed position C. When the arm 21 is rotated, the fixing portion 21b is sandwiched between the left wall 25a and the right wall 25b of the temporary fixing means 25, does not move in the horizontal direction, and moves only in the vertical direction. Is possible. Accordingly, the arm 21 is rotated so that the fixing portion 21b is held by the temporary fixing means 25, specifically, while being in contact with the right wall 25b, so that the state shown in FIGS. Will move. That is, the right side wall 25b can be understood as a fulcrum portion for supporting the fixing portion 21b of the arm 21.
As the arm 21 rotates, the door body 11 provided with the closing device body 2a can move to the left in the figure to close the door body 11 (see FIG. 6). The rotation of the arm 21 is automatically performed up to the closing position C while receiving the urging force of the urging means 23 and the buffering action of the damper 24, so that an external force applied to close the door body 11 is applied. Even if it is weak, the arm 21 can be reliably rotated to the closed position C and the door 11 can be completely closed.

On the other hand, when the door 11 is opened contrary to the above, the temporary fixing means 25 is fixed to the fixing portion 21b of the arm 21 from the closed position of the door 11 to the middle of the opening in the same manner as described above. Maintain the state of holding. Therefore, contrary to the above, the arm 21 is moved to the closed position C (rightward in the drawing) as the door body 11 moves in the opening direction with the fixing portion 21b in contact with the left wall 25a of the temporary fixing means 25. ) To the open position O (left side in the figure) (a state from FIG. 6 to FIG. 4 through FIG. 4). Here, the curved portion 27a of the leaf spring 27 and the engaging portion 26a of the arm 21 are engaged, and the arm 21 is fixed in the initial state shown in FIG. In this state, as already described, since the rotation shaft 21a of the arm 21 and the virtual axis passing through the center of the biasing means 23 substantially coincide with each other, the arm 21 is biased by the biasing means 23. In the neutral state that is not performed, the arm 21 can be prevented from returning to the original state only by the engagement between the curved portion 27 a of the leaf spring 27 and the engaging portion 26 a of the arm 21.
Then, the arm 21 is moved to the left as shown in FIG. 4, and the fixing portion 21b is in contact with the lower right wall 25d of the temporary fixing means 25 (the state shown in FIG. 3). And the door 11 is opened.

As shown in FIG. 7, when the closing device main body 2a and the temporary fixing means 25 are arranged closer to each other in the vertical direction than that shown in FIG. When the fixing portion 21b of the arm 21 comes into contact with the right lower wall 25d of the means 25, the arm 21 is moved further to the left than the normal open position O (see FIG. 3). At this time, since the virtual axis passing through the center of the urging means 23 is lower than the rotation axis 21a of the arm 21, the urging force of the urging means 23 is rotated to the left with respect to the arm 21. work. Further, the leaf spring 27 contacts the engagement piece 26 in a state where the curved portion 27 a of the leaf spring 27 is disengaged from the engagement portion 26 a of the arm 21.
Here, when the urging force of the leaf spring 27 against the arm 21 exceeds the urging force of the urging means 23, the urging force of the leaf spring 27 is illustrated by the positional relationship with the engagement piece 26. Work to the right. Therefore, as shown in FIG. 2, when the arm 21 and the temporary fixing means 25 are not in contact with each other, the arm 21 is returned to the normal open position O, and the curved portion 27 a of the leaf spring 27 and the arm 21 are set. Is engaged with the engaging portion 26a. In this case, the fixing portion 21b of the arm 21 moves along the introduction slope 25f of the temporary fixing means 25, as indicated by the broken line in FIG.
The arm 21 returns to the open position O from the state where it has gone too far to the left in the figure.
Contrary to the above, when the urging force of the urging means 23 exceeds the urging force of the leaf spring 27, the curved portion 27a of the leaf spring 27 is disengaged from the engagement portion 26a of the arm 21. However, even in this state, the urging means 23 continues to urge the arm 21 to the left in the figure, so that there is no practical problem.

The present invention is not limited to the form of this example, and can be implemented with various modifications.
In this example, the closing device main body 2a is provided on the door body 11, and the temporary fixing means 25 is provided on the door frame 12. On the contrary, the temporary fixing means 25 is provided on the door body 11, and the door The frame 12 may be provided with the closing device body 2a.
Moreover, the closing position and opening position with respect to the door frame 12 of the door 11 can be changed and set variously depending on the case. Therefore, at the time of closing, the door 11 may be set so as to be closed while maintaining a predetermined gap without being fully closed as shown in FIG.
Moreover, the door 11 may have a door at the bottom, or may have a door at the top, and the door 11 may be suspended by the door.

Further, when the closure device 2 is attached to the door body 11, the closure device body 2 a is not limited to being embedded in the door body 11 as in this example, but is attached to the surface of the door body 11. The closing device 2 can be easily attached to a normal door 11 without the closing device 2 by retrofitting.

It is a front view which shows the state which attached the closing device of this example to the sliding door. It is front view explanatory drawing which shows the structure and operation | movement of the door closing device of this example. It is front view explanatory drawing which shows the structure and operation | movement of the door closing device of this example. It is front view explanatory drawing which shows the structure and operation | movement of the door closing device of this example. It is front view explanatory drawing which shows the structure and operation | movement of the door closing device of this example. It is front view explanatory drawing which shows the structure and operation | movement of the door closing device of this example. In the door closing device of this example, it is front view explanatory drawing which shows the case where the closing device main body and the temporary fixing means are approaching the up-down direction. It is explanatory drawing which shows the other Example of this invention. It is explanatory drawing which shows the other Example of this invention. (A) is explanatory drawing which shows the other Example of this invention, (B) is AA sectional drawing of (A). It is explanatory drawing which shows the other Example of this invention. It is explanatory drawing which shows the other Example of this invention.

DESCRIPTION OF SYMBOLS 11 Door 12 Door frame 2a Closure apparatus main body 21 Arm 21a Rotating shaft 21b Fixing part 22a Opening side stopper 22b Closing side stopper 23 Energizing means 24 Buffer means, damper 25 Temporary fixing means 26a Engaging part 27 Arm position holding means 27a Bending part C Arm closed position O Arm open position

Claims (1)

The door body of the sliding door type (11) arranged to be openable and closable with respect to the door frame (12) can be automatically closed while the door body (11) exists from a predetermined open position to a closed position. Device,
The door frame (12) is provided with temporary fixing means (25),
The door body (11) is provided with a closing device body (2a),
The closing device main body (2a) includes an opening position (O) corresponding to the opening position of the door body (11) before the automatic closing operation starts, with the rotation axis (21a) as a center, An arm (21) rotatable within a range between a closed position (C) corresponding to the closed position of the body (11);
Biasing means (23) for biasing the arm (21) so that the arm (21) rotates from the open position (O) to the closed position (C);
When the arm (21) rotates from the open position (O) to the closed position (C), a buffer means (24) for decelerating the rotation of the arm (21) is provided, and the buffer The means (24) is a direct acting damper (24) having a movable rod (24a),
The temporary fixing means (25) is capable of holding the fixing portion (21b) which is a part of the arm (21) so as to be immovable in the left-right direction.
When the door body (11) is automatically closed, the fixing portion (21b) is held by the temporary fixing means (25), and in this state, the arm ( 21) rotates, and thereby the door (11) is closed,
The temporary fixing means (25) is a first wall (25a) and a second wall positioned closer to the door (11) than the first wall (25a) in the opening / closing direction of the door (11). In a door closing device having a wall (25b) and an arm fixing groove (25c) opened downward so as to be sandwiched between a first wall (25a) and a second wall (25b),
When the arm (21) moves from the normal open position and the movable rod (24a) is about to be pulled out beyond the limit, the arm (21) comes into contact with a part of the arm (21), thereby The door closing device is provided with an open side stopper (22a) for preventing further movement of the door .

Images