JP2009275497A - Shutoff device for sliding door - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a shutoff device for a sliding door which is provided with a flat spiral spring, which uses a door closer which can be adjusted to an arbitrary spring force by a simple constitution and easy operation, and which makes possible silent and secure shutoff of the sliding door. <P>SOLUTION: The shutoff device 1 for the sliding door is provided with the door closer 1A and a shock-absorbing device 1B. The door closer 1A has a drum having a built-in flat spiral spring 4, and shuts off the sliding door 30 which has been opened by the spring force of the flat spiral spring 4. The shock-absorbing device 1B has a piston 12 and a cylinder 13, and exerts a braking force at the time of shutoff of the sliding door. The shutoff device 1 for the sliding door is constituted so that it can regulate the open position and the closure position of the piston and the cylinder of the shock-absorbing device through the medium of a first retaining means H1 and a second retaining means H2. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a sliding door closing device that is used for applications such as automatic closing of sliding doors and doors and that can be closed quietly and reliably.

  Conventionally, as a closing device that automatically closes an opened door, a hydraulic door closer is generally used. A door closer for a sliding door that combines an air damper and a spring is known as a closing device particularly applied to the sliding door. In such a known closing device, it is fixed to the upper part of the sliding door, the mounting member and the end of the sliding door are engaged, and when the sliding door is opened, it resists the resistance of the air damper while compressing the spring. The sliding door is opened, and the opened sliding door is closed against the resistance of the air damper by the spring force of the spring.

  An output adjustment type mainspring unit has already been filed as a door closer that is a closing device that automatically closes a sliding door using a spring spring (see, for example, Patent Document 1).

Further, a fitting including a piston, a cylinder, and a closing spring, and the piston slides in the cylinder to exert a braking force to exhibit a buffering effect, and the movement in the closing direction and the closed state are maintained via the closing spring. A buffer closure device has already been filed. (For example, refer to Patent Document 2).
JP 11-241558 A JP-A-2005-290661

  In a closing device using a door closer that uses a spring spring, it is necessary to increase the opening / closing force (spring force) in order to increase the closing force, and to adjust the spring force, a predetermined amount of spring spring is required. It is necessary to be in a state of being involved. In addition, it is necessary to use a ratchet in order to prevent the wound spring spring from rotating back.

  Further, when slightly reducing the spring force of the door closer once set to a strong opening / closing force, it is necessary to slightly unwind the spring spring once wound in a predetermined amount and adjust it to a desired predetermined spring force. At this time, the ratchet is released and the mainspring is rewound by a predetermined amount, and then the ratchet is engaged and fixed again.

  However, while the ratchet is released with one hand, the spring spring is rewound with the other hand, and the operation to rewind the spring spring that has been wound in advance while adjusting the force with one hand is forceful and anyone can do it. It was not an easy operation.

  Furthermore, when the spring force is increased, the force for closing the sliding door is increased, which causes a problem that it is difficult to close the sliding door quietly. In addition, if the spring force is strong, a problem arises that force is required even when the sliding door is opened.

  The present invention has been made in view of the above circumstances, and includes a spring spring, a door closer that can be adjusted to an arbitrary spring force with a simple configuration and easy operation, and the sliding door can be quietly and reliably secured. It aims at providing the closing device for sliding doors which can be closed.

  In order to achieve the above object, the present invention provides a sliding door closing device provided on a fixed frame so as to be freely opened and closed. A drum installed in the sliding door and having a spring built therein and one end fixed to the drum and the other end And a door closer configured to close the opened sliding door by the spring force of the mainspring, and abutting on the door closer installed in the frame and moving in conjunction with the closing sliding door A shock absorber that applies a braking force, and the shock absorber moves in contact with the door closer, a piston connected to the shaft, a cylinder that slidably accommodates the piston, First and second holding means for holding the movement end positions in both the closing direction and the opening direction, and air in the cylinder compressed when the piston moves in the closing direction And release means for releasing, is characterized in that it comprises introduction means for introducing the outside air into the cylinder during the movement in the opening direction of the piston.

  If it is said structure, a sliding door can be easily closed via a door closer. Further, since the shock absorber is used when closing, it can be closed quietly.

  Further, the present invention provides the sliding door closing device configured as described above, wherein an open position restricting magnet and a close position restricting magnet are provided at both end portions of the inner cavity of the cylinder, and an open magnet and a closing magnet are provided on both surfaces of the sliding tip of the piston, respectively. The open position restricting magnet and the open magnet are magnetized to form first holding means, and the closed position restricting magnet and the closing magnet are magnetized to form second holding means. It is a feature. If it is this structure, since the movement front-end | tip position of a piston and a shaft is controlled via a 1st holding means, when closing, the position which contacts with a door closer and a brake will be applied can be controlled. Moreover, since the closed position is regulated via the second holding means, the closed state can be held by a magnetic force.

  According to the present invention, in the sliding door closing device having the above-described configuration, the discharge means is configured by a plurality of grooves provided in the inner cavity of the cylinder, and the disposition positions of the plurality of grooves are different, so that the piston closing direction is set. When moving to, the air escape groove is formed in order by engaging in order from the middle of the movement. If it is this structure, the effectiveness of a brake can be changed with the number and arrangement | positioning position of a groove | channel, and it becomes possible to exhibit desired braking force.

  According to the present invention, in the sliding door closing device configured as described above, a contact magnet is provided at a tip portion of the shaft opposite to an end portion where the piston is provided, and the door closer is engaged with the contact magnet. A combination magnet is provided, and a coil spring as a pulling spring is attached between the cylinder projecting from the cylinder and the abutting magnet to bias the shaft in the closing direction. If it is this structure, a shaft can be pulled out by the engagement magnet engaged with the engagement magnet of the door closer which moves with the opening sliding door by operation which opens a sliding door. In addition, when the sliding door is closed, the door closer is brought into contact with the pulled-out shaft whose position is held by the first holding means and pushed by the force of the coil spring as a pulling spring. It becomes the structure to assist.

  Further, the present invention provides the sliding door closing device having the above-described configuration, wherein the door closer is wound by fixing one end of the mainspring spring to a support shaft that is rotatably supported through the front surface and the back surface of the main body case. In addition, a cam plate is attached to one end of the support shaft that protrudes from the surface of the main body case, and the support shaft is prevented from rotating via a locking means that prevents the cam plate from rotating. The support shaft can be rotated by moving the support shaft either forward or backward in the axial direction to release the engagement of the locking means. With this configuration, a simple operation of moving the support shaft, to which one end of the mainspring spring is fixed, in the axial direction thereof, becomes a door closer for the sliding door that can be selected to fix and rotate the cam plate. Easy to adjust and can be closed safely and securely.

  According to the present invention, in the sliding door closing device configured as described above, the door closer moves in a direction in which the support shaft is pushed in to release the engagement of the locking means, and a plurality of hooks are formed on the outer peripheral portion of the cam plate. A claw member that engages with the hook-shaped portion and the hook-shaped portion constitute the locking means, and the cam plate is accommodated on the surface of the main body case including the cam plate. The cam plate is mounted as a configuration in which a depressed portion is provided, a spring member is mounted between the surface of the main body case of the support shaft and the cam plate, and the cam plate is supported separately from the depressed portion. By pushing in one end side of the support shaft, the claw member is separated from the hook-shaped portion to release the engagement. With this configuration, the cam plate can be rotated by pushing in the support shaft, and the force to open and close the sliding door can be adjusted easily and reliably and safely using a door closer that can adjust the spring force of the spring. it can.

  According to the present invention, there is provided a door closing device that includes a drum having a spring built therein, closes a sliding door that is opened by the spring force of the spring, and a buffer device that applies a braking force when closing the sliding door. Since the opening position and the closing position of the shock absorber piston and cylinder are regulated via the first holding means and the second holding means, the opened sliding door is automatically closed and In this case, it is possible to obtain a sliding door closing device that restricts the position where the braking force is exerted and can hold the closed sliding door in the closed position while applying the braking force.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of a sliding door closing device according to the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a schematic explanatory view showing an application example of the sliding door closing device according to the present invention. FIG. 2 is a schematic explanatory view showing the cooperating state of the door closer and the shock absorber constituting the sliding door closing device according to the present invention, showing a disengaged state separated in (a), and (b). The engagement state which touches and cooperates is shown. FIGS. 3A and 3B are enlarged explanatory views of the shock absorber. FIG. 3A shows a state in which the shaft protrudes from the cylinder, and FIG. FIG. 4 shows an example of a door closer, where (a) is an overall front view and (b) is a side view showing an AA cross section.

  As shown in FIG. 1, the sliding door closing device 1 according to the present invention maintains a sliding door 30 that is provided on a fixed frame 31 so as to be openable and closable, and closes the sliding door 30 when opened. This is a device that urges in the direction and closes quietly, and when pulling the sliding door 30 in the direction of the arrow X in the figure, the door closer 1A that stores the urging force in the closing direction and the buffer that quietly closes the sliding door to be closed It is set as the structure provided with the apparatus 1B. Therefore, when the sliding door 30 is opened and opened, the sliding door 30 is automatically closed by moving in the closing direction by the urging force exerted by the sliding door closing device 1.

  The door closer 1A is installed in the sliding door 30 and has a drum with a built-in spring spring and a wire W for fixing one end to the drum and connecting the other end to the frame 31. By pulling the sliding door 30 and opening the door, In this configuration, the drum spring is rotated to wind up the spring spring, and the urging force for closing the sliding door 30 is exhibited by the spring force when the wound spring spring is opened. Further, the shock absorber 1B is a device that applies an appropriate braking force to the sliding door 30 to be closed, and exerts an appropriate braking force even if the spring force of the spring spring is increased in order to securely close the sliding door 30. And can be closed quietly. Therefore, in the present embodiment, the shock absorber 1B is installed on the frame 31 on the fixed side, and is configured to abut against the door closer 1A that moves in conjunction with the sliding door 30 to be closed to apply a braking force.

  The shock absorber 1 </ b> B has a contact portion that contacts the door closer 1 </ b> A that moves together with the sliding door 30 in order to apply a braking force to the sliding door 30 that closes, and includes the shaft 11 that moves together with the sliding door 30 after the contact. . Furthermore, a piston 12 connected to the shaft 11, a cylinder 13 that slidably accommodates the piston 12, and first and second holding means that hold the movement end positions in both the closing direction and the opening direction of the piston 12. And a compressed air discharge means for releasing air in the cylinder compressed when the piston 12 moves in the closing direction, and an outside air introduction means for introducing outside air into the cylinder when the piston moves.

  Next, the shock absorber 1B and the first and second holding means will be further described with reference to FIG.

  The shock absorber 1B shown in FIG. 2A is in a non-engagement state separated from the door closer 1A, and is in such a state when a person opens the sliding door. When the hand that has opened the sliding door is released from the knob from this state, the sliding door is gradually closed by the spring force of the spring spring included in the door closer 1A. The closed state is shown in FIG.

  As shown in FIG. 2A, an open position restricting magnet M1 and a closed position restricting magnet M2 are provided at both end portions of the inner cavity of the cylinder 13, and an open magnet M3 and a close magnet are provided on both surfaces of the sliding tip of the piston 12, respectively. In the state where M4 is provided and the shaft 11 protrudes from the cylinder 13, the open position restricting magnet M1 and the open magnet M3 are magnetized to form the first holding means H1. Further, when the shaft 11 enters the cylinder 13 (see FIG. 2B), the closed position restricting magnet M2 and the closing magnet M4 are magnetized to form the second holding means H2. did.

  Further, a contact magnet M5 is provided at the tip of the shaft 11 opposite to the end where the piston is provided, and the engagement is performed at a predetermined position of the door closer 1A opposite to the contact magnet M5. A magnet M6 is provided, and a coil spring 14 as a pulling spring is mounted between the cylinder protruding from the cylinder 13 and the abutting magnet M5 so as to bias the shaft 11 in the closing direction.

  For this purpose, the engaging magnet M6 of the door closer 1A abuts on the abutting magnet M5 of the shaft 11 in conjunction with the operation of closing the opened sliding door. Thereafter, the shaft 11 enters the cylinder 13 together with the sliding door that is closed. For this purpose, the holding force of the first holding means H1 maintaining the protruding position of the shaft 11 is stronger than the pulling force of the coil spring 14 and weaker than the resultant force of this pulling force and the closing force of the sliding door. That's fine. That is, when the engagement magnet M6 of the door closer 1A and the contact magnet M5 of the shaft 11 come into contact with each other, the resultant force of the closing force by the spring spring built in the door closer 1A and the pulling force by the coil spring 14 is held by the first holding means H1. The opening position regulating magnet M1 and the opening magnet M3 constituting the first holding means H1 are separated from each other and the sliding door is closed.

  The state will be described with reference to FIG. When the closed sliding door is opened, the second holding means H2 formed by magnetizing the closed position restricting magnet M2 and the closing magnet M4 is released, and the shaft 11 projects from the cylinder 13 in conjunction with the door closer 1A. Go. Then, the open position regulating magnet M1 and the open magnet M3 are magnetized to form the first holding means H1, and are fixed at this position. Thereafter, when the sliding door is further opened, the engaging magnet M6 of the door closer 1A is detached from the contact magnet M5 of the shaft 11, and the door closer 1A is separated.

  As will be described later, the spring spring built in the door closer 1A is wound in the operation of opening the sliding door and urged in the direction of closing the sliding door. Therefore, when the hand is released from the opened sliding door, the sliding door is closed by the spring force exerted by the mainspring.

  As the sliding door closes, the engaging magnet M6 of the door closer 1A abuts against the abutting magnet M5 of the shaft 11 in the middle of the sliding door to release the magnetic adhesion between the opening position restricting magnet M1 and the opening magnet M3. The holding means H1 is released. Then, it further moves in the closing direction, and at the closing end, the closing position restricting magnet M2 and the closing magnet M4 are magnetized to form the second holding means H2. That is, the closed position is held via the second holding means H2.

  As described above, since the piston 12 slides in the cylinder 13 according to the opening and closing of the sliding door, it is necessary to put air in and out of the cylinder. For this purpose, in the present embodiment, compressed air discharge means for releasing the air in the cylinder 13 that is compressed when the piston 12 moves in the closing direction, and outside air is introduced into the cylinder 13 when the piston 12 moves. It is set as the structure provided with an external air introduction means.

  Next, the compressed air discharge means and the outside air introduction means will be described with reference to FIG.

  As shown in FIG. 3A, a groove 15 is provided at a predetermined position in the inner cavity of the cylinder 13 to form a discharge means EX for releasing air in the cylinder chamber 13A compressed by the movement of the piston 12. At this time, one or a plurality of grooves 15 may be provided. For example, when a plurality of grooves 15 are provided in the circumferential direction of the cylinder lumen, the discharge speed of the air in the cylinder chamber 13A to be compressed is increased. Can do. Further, when the plurality of grooves are provided, the arrangement positions of the plurality of grooves are changed, and when moving in the closing direction of the piston 12, the air is gradually released by engaging in order from the middle of the movement. It is also possible to do.

  For example, as shown in the development view of FIG. 3B, when grooves 15A, 15B, and 15C having different lengths are provided, the timing at which compressed air is discharged is shifted, and the timing is determined via the groove 15A. The discharge is started at T1, the discharge from the groove 15B is started at the timing T2, and the discharge from the groove 15C is started at the timing T3. If it is this structure, the effectiveness of a brake can be changed with the number and arrangement | positioning position of a groove | channel, and it becomes possible to exhibit desired braking force by the size and weight of a pull.

  In addition, when moving between the compressed state (corresponding to the closed state of the sliding door) and the expanded state (corresponding to the state of opening the sliding door), air is inserted into the cylinder chamber 13A through the groove 15 part. In addition, air is inserted into the cylinder 13 </ b> B through a hole 16 having a predetermined diameter provided in the cylinder 13 and a passage 17 connected to the hole 16 and provided in the inner cavity of the cylinder 13. That is, the hole 16 and the passage 17 constitute the outside air introducing means SU.

  When the sliding door including the shock absorber 1B having the above-described configuration is opened, air is not inserted into the cylinder chamber 13A at a position where the piston 12 passes the groove 15, and thereafter, the air in the cylinder chamber 13A expands. It will be done. Therefore, in this state, the brake is applied when the sliding door is opened, and even if the sliding door is suddenly opened, the sliding door can be prevented from violently colliding with the open end. Therefore, the braking force when opening the sliding door can be adjusted by adjusting the position of the groove 15.

  Further, when the piston 12 further moves in the direction to open the sliding door and passes through the passage 17, the outside air is inserted into the cylinder chamber 13 </ b> A through the passage 17, the brake is released, and the piston 12 moves smoothly. Therefore, by changing the arrangement position of the groove 15 and the passage 17 and the gap length L between them, it becomes possible to adjust the timing and magnitude of braking of the driving force when the sliding door is opened and closed. By selecting an appropriate arrangement position according to weight or the like, it is possible to obtain a sliding door closing device that opens and closes with a desired force.

  As described above, since the piston 12 reciprocates in the cylinder 13 in accordance with the operation of opening and closing the sliding door, the piston chamber 13A at this time can be used as long as it is a sliding door closing device including the compressed air discharge means EX composed of a plurality of grooves. The timing of releasing the air inside and the timing of inserting the air into the piston chamber 13A can be adjusted, and both the braking force when closing the sliding door and the braking force when opening the sliding door are adjusted to a desired range. It is easy to maintain.

  Therefore, if the sliding door closing device 1 includes the first holding means H1, the second holding means H2, the compressed air discharge means EX, and the outside air introducing means SU, the movement of the piston 12 and the shaft 11 via the second holding means H2. The tip position can be regulated, and the position where the brake is applied by contacting the door closer 1A when closing can be regulated. Further, the closed state can be held by magnetic force through the first holding means H1.

  Next, the door closer 1A will be described with reference to FIG. The door closer 1A moves in a direction in which the support shaft 3 supporting the drum incorporating the mainspring spring is pushed in, and engages with a locking means for preventing the rotation of the cam plate 5A attached to the tip of the support shaft 3. It is a door closer that unlocks.

  The door closer 1A includes a box-shaped main body case 2, a mainspring 4 housed in the main body case 2, one end of the mainspring spring 4 being fixed, and penetrating the front surface 2a and the back surface 2b of the main body case 2. The support shaft 3 rotatably supported, one end portion 3A of the support shaft 3 projecting from the surface 2a of the main body case 2, and the projecting end portion 3A to the cam plate 5; A drum 6 incorporating the mainspring 4 and a wire W wound around the drum 6 with one end fixed thereto are provided. The main body case 2 is fixed to the sliding door, and the tip end of the wire W is locked to the frame. In order to lock the wire W, for example, a ring hook may be provided at the wire tip, and the ring hook may be hooked on a locking tool provided on the frame.

  When the sliding door is pulled and opened in this state, the wire W pulled through the guide roller is pulled out and the mainspring 4 is wound up. When the sliding door opened thereafter is opened, the mainspring 4 is opened and rotates in the direction of rewinding the wire W, thereby closing the sliding door. In this manner, the sliding door is automatically closed when the wire W is pulled out and rewound in accordance with the opening and closing of the sliding door through the spring 4.

  In addition, the cam plate 5 is provided with a plurality of hook-like portions 51 (three places in the present embodiment) on the outer periphery of the cam plate 5 so as to be evenly arranged on the circumference, and claw pieces that engage with the hook-like portions 51. The claw member 8 having 8B is configured to stop the rotation of the cam plate 5. When the rotation of the cam plate 5 is stopped, the rotation of the support shaft 3 to which the cam plate 5 is fixed is stopped. That is, the claw member 8 and the hook-shaped portion 51 constitute a locking means for preventing the cam plate 5 from rotating, and the supporting shaft 3 is fixed by the locking means to obtain a predetermined spring force of the spring. Can be set.

  Further, a recessed portion 20 that can accommodate the cam plate 5 is provided on the surface of the main body case 2 including the cam plate 5, and between the surface 2 a of the main body case of the support shaft 3 and the cam plate 5. A spring member is attached to the cam plate 5 so that the cam plate 5 is spaced apart from the depressed portion 20 and is supported by pushing one end 3A side of the support shaft 3 on which the cam plate 5 is attached. The claw piece 8 </ b> B of the claw member 8 is separated from the hook-shaped portion 51 to release the engagement.

  The claw member 8 is rotatably supported by the main body case 2 via a support shaft 9, and is further urged by a spring material 10 in a direction in contact with the hook-shaped portion 51, and in a reverse direction. It is supported so that it cannot rotate.

  Therefore, the claw member 8 is always in contact with the cam surface of the cam plate 5. In addition, when the cam plate 5 is pushed in to release the engagement relationship with the claw member 8 and then the cam plate 5 is rotated to have a predetermined spring force, one end of the claw member 8 is By returning the cam plate 5 while supporting 8A with a finger, it can be fixed at a new engagement position.

  Further, a handle portion 52 is provided on the surface of the cam plate 5 so that an operator can easily push in or pick it up. Reference numeral 53 denotes a fixing mounting hole for fixing the cam plate 5 to a screw hole (not shown) provided on the surface 2a of the main body case.

  In order to attach the door closer 1 </ b> A to the sliding door, an attachment hole 23 is provided in the back surface 2 b of the main body case 2. Reference numeral 22 denotes a hole provided on the surface 2 a, which is a hole into which a screwdriver for tightening a screw member inserted into the attachment hole 23 is inserted, and is larger than the attachment hole 23.

  The door closer 1A not only fixes the back surface 2b, but also has a mounting hole 24 in the extended portion of the bottom surface 2c so that it can be fixed by the bottom surface 2c. It is set as the structure which can be attached by both of 2c.

  In addition, a spring member is attached to the depressed portion 20 in order to press the cam plate 5 attached to one end 3A of the support shaft 3 penetrating the main body case 2 toward the surface 2a side of the main body case 2. is doing. In the present embodiment, a conical spring SW is employed as the spring member. Therefore, even when the depth of the depressed portion 20 is small, the conical spring SW that exhibits a predetermined spring force is used, so that the support shaft 3 can be pushed in with a predetermined pressing force. Moreover, since the depth of the depressed portion 20 may be small, the axial length can be shortened, and a door closer with a compact shape can be obtained.

  A recessed portion 21 is also provided on the back surface 2 b of the main body case 2. The depressed portion 21 is a depressed portion having a depth such that the rear end portion 3B of the support shaft 3 does not protrude from the back surface 2b. Furthermore, if the depressed portion 21 has a depth that does not protrude from the back surface 2b when the support shaft 3 is pushed in, the door closer 1A can be fixed with the entire back surface in close contact with a wall or the like. Is preferred.

  That is, when the support shaft 3 and the cam plate 5 are pushed in as much as the amount of deformation of the conical spring SW, the collar portion 51 of the cam plate 5 is designed to be separated from the claw member 8. Can be rotated. That is, the spring force for closing the sliding door of the door closer 1A can be adjusted.

  Since it is set as the above structure, the door closer 1A according to the present invention can be easily adjusted to a desired spring force by a simple operation of pushing in the cam plate 5, rotating a predetermined amount, and pulling it back.

  Further, instead of the door closer 1A, it is possible to use a door closer that moves in the direction of pulling out the support shaft and releases the engagement of the locking means, but this is not described in detail here. However, since the operation of pushing the support shaft is easier than the operation of pulling out the support shaft, a door closer that can adjust the spring force of the mainspring spring by rotating the cam plate by pushing the support shaft is preferable. Further, the door closer can be used to easily adjust the force for opening and closing the sliding door, and can be reliably and safely closed when the door is closed.

  As described above, according to the present embodiment, when adjusting the spring force of the mainspring spring, the main body case and the cam plate do not rotate freely even if the force is suddenly removed (every predetermined angle). In this embodiment, the concave portion and the convex portion are surely engaged and stopped from rotation every 90 °. Therefore, it is possible to obtain a door closer that can be easily operated even by a powerless person and can be operated with peace of mind by women and elderly people.

  The sliding door closing device 1 according to the present invention uses the door closer 1A that winds up the spring by an operation of pulling and opening the sliding door, and closes the sliding door through the spring force when the spring is opened. With the force, a closing force of an arbitrary magnitude can be obtained. In addition, since the spring force exerted by the mainspring can be easily adjusted, it is easy to cope with various types of sliding doors, and a single door closer can be applied to various types of doors.

  In addition, when the sliding door closing device 1 according to the present invention closes the sliding door, the sliding door abuts against the door closer to apply a braking force, and the first holding means H1, the second holding means H2, the compressed air discharge means EX, and the outside air. Since the shock absorber 1B including the introduction means SU is used, the sliding door can be closed gently and the closed position can be maintained as it is.

  As described above, according to the present invention, the drum has a spring built therein, the door closer that closes the sliding door opened by the spring force of the spring, the piston and the cylinder, and the braking force is applied when closing the sliding door. The shock absorber is provided, and the piston and the cylinder of the shock absorber are configured to regulate the open position and the closed position via the first holding means and the second holding means, so the open sliding door is connected via the door closer. The door closer and the shock absorber are engaged, the position where the braking force is exerted when closing is regulated, the sliding door is closed while applying the braking force, and the closed sliding door is A sliding door closing device that can be held in the closed position can be obtained.

  It is a schematic explanatory drawing which shows the example of use of the closing device for sliding doors which concerns on this invention.   It is a schematic explanatory drawing which shows the cooperation state of the door closer and buffer device which comprise the closing device for sliding doors which concerns on this invention, Comprising: (a) shows the disengaged state spaced apart, (b) contact | abuts and cooperates The working engagement state is shown.   It is expansion explanatory drawing of a buffering device, Comprising: (a) shows the state which the shaft protruded from the cylinder, (b) shows the principal part enlarged view.   An example of a door closer is shown, (a) is an overall front view, and (b) is a side view showing an AA cross section.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Closing device for sliding doors 1A Door closer 1B Shock absorber 2 Main body case 3 Support shaft 4 Spring spring 5 Cam plate 11 Shaft 12 Piston 13 Cylinder H1 First holding means H2 Second holding means EX Pressure air discharge means SU Outside air introduction means W Wire

Claims (6)

A sliding door closing device provided on a fixed frame that can be freely opened and closed has a drum that is installed in the sliding door and has a spring built in, and a wire that has one end fixed to the drum and that connects the other end to the frame. A door closer configured to close the sliding door by the spring force of the mainspring,
A shock absorber for applying a braking force is provided in contact with the door closer that moves in conjunction with the sliding door that is installed on the frame and closes.
The shock absorber includes a shaft that moves in contact with the door closer, a piston connected to the shaft, a cylinder that slidably accommodates the piston, and a moving end position in both the closing direction and the opening direction of the piston. First and second holding means for holding, release means for releasing air in the cylinder compressed when the piston moves in the closing direction, and introducing outside air into the cylinder when the piston moves in the opening direction A closing device for sliding doors, characterized in that it comprises an introduction means.   An open position restricting magnet and a closed position restricting magnet are provided at both end portions of the lumen of the cylinder, an open magnet and a closing magnet are provided on both surfaces of the sliding tip of the piston, and the open position restricting magnet and the open magnet are provided. 2. The sliding door closing device according to claim 1, wherein a first holding means is formed by magnetizing, and a second holding means is formed by magnetizing the closed position restricting magnet and the closing magnet. .   The releasing means is composed of a plurality of grooves provided in the inner cavity of the cylinder, and when the plurality of grooves are arranged at different positions and moved in the closing direction of the piston, they are sequentially engaged from the middle of the movement. The sliding door closing device according to claim 1, wherein the air escape groove is formed in order.   An abutting magnet is provided at the tip of the shaft opposite to the end where the piston is provided, an engaging magnet for engaging the abutting magnet is provided on the door closer, and the cylinder protrudes from the cylinder 4. The sliding door closure according to claim 1, wherein a coil spring as a pulling spring is mounted between the contact magnet and the abutting magnet to bias the shaft in the closing direction. 5. apparatus. The door closer is fixedly wound on one end of the mainspring spring on a support shaft that is rotatably supported through the front and back surfaces of the main body case, and from the surface of the main body case of the support shaft. A cam plate is attached to one projecting end, and the support shaft is prevented from rotating through a locking means for preventing the cam plate from rotating.
5. The support shaft according to claim 1, wherein the support shaft can be rotated by moving the support shaft forward or backward in the axial direction to release the engagement of the locking means. The closing device for sliding doors as described.   The door closer moves in the direction of pushing in the support shaft to release the engagement of the locking means, and a plurality of hook-like portions are provided on the outer peripheral portion of the cam plate, and the pawl engages with the hook-like portion. The member and the hook-shaped portion constitute the locking means, and a surface of the main body case having the cam plate is provided with a depressed portion capable of accommodating the cam plate, By mounting a spring member between the surface and the cam plate and supporting the cam plate apart from the depressed portion, by pushing one end side of the support shaft on which the cam plate is mounted, The sliding door closing device according to claim 5, wherein the claw member is released from the hook-shaped portion to release the engagement.

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