JP2007051509A - Closer for sliding door - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a compact and silent closer for a sliding door without generating an abnormal sound without impairing an appearance of the sliding door 3. <P>SOLUTION: This closer 1 is provided with a driving part (a) having a reel 7 wound with a wire 5 and a spiral spring 8 in a body case 2 and a braking part (b) having a damper mechanism, and closes the sliding door 3 by allowing the opened sliding door 3 to rewind the wire 5 on the reel 7 of the driving part (a) against resistance of the damper mechanism of the braking part (b) by restoring force of the spiral spring 8 by winding and fastening the spiral spring 8 while delivering the wire 5 from the reel 7 when opening the sliding door by installing one of an end part of the wire and the body case in the sliding door, and installing the other in a sliding door frame. The braking part (b) is arranged to superpose in the axial direction of a support shaft 6 of the driving part (a), and the driving part (a) and the braking part (b) are operatively connected via a one-way mechanism. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a sliding door closer capable of automatically closing a sliding door.

In general, this type of closer is provided with a drive unit incorporating a reel around which a wire is wound, a spring for rotating the reel, and a brake unit having a damper mechanism. The drive unit and the brake unit are connected to a main body case. Were placed in parallel. The brake unit is provided with a pulley integrated with the damper mechanism so that the wire fed from the reel of the drive unit is wound around the pulley an appropriate number of times and then led out of the main body case. Then, the end of the wire is fixed to the sliding door frame, the main body case is fixed to the upper part of the sliding door, and the sliding door is opened manually. At this time, the wire is drawn out from the reel and the mainspring is tightened. The opened sliding door can be automatically closed by rewinding the wire to the reel of the driving unit against the resistance of the damper mechanism of the braking unit by the restoring force of the mainspring.
Utility Model Registration No. 3101743 JP 2005-113663 A

  However, according to the closer for a sliding door having the above-described configuration, since the driving unit and the braking unit are arranged in parallel, the main body case has to be large, and the appearance of the sliding door is impaired. Further, since the wire is wound around the pulley an appropriate number of times, the wire is led out at the time of opening and closing, and rubbing occurs between the pulley and the wire when introduced, so that abnormal noise is generated during operation. In addition, the wire wears quickly.

  It is an object of the present invention to solve the above-mentioned problems, and to provide a quiet sliding door closer that is compact and does not impair the appearance of the sliding door and that does not generate abnormal noise.

  In order to solve the above problems, a closer for a sliding door according to the present invention includes a reel having a wire wound around a main body case, and a spring having one end engaged with the reel and the other end fixed to a spindle. And a brake part having a damper mechanism, fixing the end of the wire to the sliding door frame, fixing the main body case to the upper part of the sliding door, and when the sliding door is opened, the wire is fed out from the reel and the mainspring is wound up. In the door closer that closes the sliding door by rewinding the wire to the reel of the driving unit against the resistance of the damper mechanism of the braking unit by the restoring force of the mainspring, the opened sliding door is closed in the axial direction of the supporting shaft of the driving unit The braking unit is arranged so as to overlap, and the driving unit and the braking unit are operatively connected via a one-way mechanism.

  Note that the braking unit may be configured by a damper mechanism including an annular rotor, or may be configured by a rotary damper.

  When the braking portion is constituted by a damper mechanism comprising an annular rotor, an annular gear is formed on one side of the reel of the wire, the damper mechanism is disposed on the outer peripheral side or inner peripheral side of the annular gear, It is preferable that the annular rotor is operatively connected through the one-way mechanism.

  According to the present invention, the sliding door closer has a structure in which the braking portion is arranged in the axial direction of the support shaft of the driving portion, and the driving portion and the braking portion are operatively connected via a one-way mechanism that can be downsized. Therefore, it can be made much more compact than the conventional arrangement in which the driving unit and the braking unit are arranged in parallel. Therefore, the appearance of the sliding door is not impaired. In addition, the conventional closer also has a pulley arranged on the braking portion and is not thin. Therefore, even if it is the structure which arranged the drive part and the brake part in parallel, the thickness can be suppressed to the same extent as the conventional one.

  In addition, since it is fed directly from the wire reel, it does not rub like a conventional closer, improves durability, and does not generate abnormal noise during operation. There is nothing.

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

  1 (a) and 1 (b) show a usage mode of a sliding door closer. The body case 2 of the closer 1 is fixed to the upper part of the sliding door 3, and the end of the wire 5 led out from the body case 2 (the hook thereof) ) Is attached to the sliding door frame 4. In this state, when the sliding door 3 is opened as shown in FIG. 5A, the wire 5 is drawn out from the main body case 2, and after opening the sliding door 3, when the force is released, the wire 5 is pulled back into the main body case 2. The sliding door 3 automatically closes as shown in FIG.

  2 and 3, a support shaft 6 is disposed in the center of the main body case 2 of the closer 1, and a driving portion a and a braking portion b of the wire 5 are provided on the support shaft 6. They are arranged so as to overlap in the axial direction. The drive part a is provided with a reel 7 and a spring 8 around which the wire 5 is wound. The reel 7 is rotatably supported by the support shaft 6, and an annular gear 10 is formed on the side surface on the braking portion b side. The wire 5 is wound around the wire winding portion 7a, and its one end 5a is locked in the groove 11 of the wire winding portion 7a. Further, one end 8 a of the spring 8 is engaged with the reel 7, and the other end is engaged with the engagement groove 12 of the support shaft 6. The mainspring 8 is disposed on the inner peripheral side of the wire winding portion 7a.

  On the other hand, the damper b is provided with a damper mechanism. The damper mechanism is constituted by an annular rotor 13 shown in FIG. The annular rotor 13 is accommodated in the annular recess 14 of the main body case 2 so as to be rotatable about the support shaft 6 as shown in FIG. Between the annular rotor 13 and the annular recess 14 is filled with a viscous fluid such as silicon oil that serves as a rotational resistance of the annular rotor 13. Reference numeral 15 denotes a seal portion. Further, an annular convex portion 16 is formed on the side surface of the annular rotor 13 on the driving portion a side, and the annular gear 10 of the reel 7 of the driving portion a is arranged on the inner peripheral side of the annular convex portion 16. Has been.

  Next, the driving part a and the braking part b are operatively connected via a one-way mechanism. That is, as shown in FIG. 4, two floating gear accommodating portions 18 are formed on a part of the inner periphery of the annular convex portion 16 of the annular rotor 13. As shown in FIG. 5A, each accommodating portion 18 accommodates one floating gear 17. The height of each accommodating portion 18 is slightly smaller than the diameter of the floating gear 17, and the width thereof is larger than the size of the floating gear 17. Further, one side of the accommodating portion 18 is formed in an arc shape, and a protrusion 20 is formed in the intermediate portion on the other side. The floating gear 17 is movable in the circumferential direction in the housing portion 18 and is always meshed with the annular gear 10 of the reel 7.

  According to the one-way mechanism, when the reel 7 rotates in the direction A as shown in FIG. 5A, the floating gear 17 meshing with the annular gear 10 is moved to one side of the housing portion 18. Idle. On the other hand, when the reel 7 rotates in the B direction as shown in FIG. 5B, the floating gear 17 is moved to the other side of the accommodating portion 18 and engages with the protrusion 20 so that it cannot rotate.

  The floating gear 17 may be configured to be accommodated only in the one accommodating portion 18, or may be configured such that three accommodating portions 18 are formed and the floating gear is accommodated in each of the accommodating portions 18.

  Next, the operation | movement aspect of the said closer 1 for sliding doors is demonstrated. First, as shown in FIG. 1A, when the sliding door 3 moves in the opening direction and the wire 5 is fed out from the main body case 2, the reel 7 rotates in the A direction, and the mainspring 8 is wound. At this time, since the floating gear 17 rotates idly, the annular rotor 13 does not rotate either.

  On the other hand, as shown in FIG. 1B, when the force is released after the sliding door 3 is opened, the mainspring 8 is rewound by the restoring force, so that the reel 7 rotates in the B direction. At this time, the floating gear 17 is moved to the opposite side and engages with the protrusion 20 of the accommodating portion 18 and cannot rotate. For this reason, the reel 7 and the annular rotor 13 rotate integrally. Since the annular rotor 13 rotates while being braked, the rotation of the reel 7 is also suppressed and rotates slowly. Therefore, the sliding door 3 does not return abruptly and returns at a low speed, and the sliding door 3 gently hits the sliding door frame 4 and closes.

  The damper mechanism may be arranged on the inner peripheral side of the annular gear 10. In this case, the annular gear is formed on the inner peripheral side.

  In addition, you may comprise the said braking part b with a rotary damper.

  That is, as shown in FIG. 6, a rotary damper accommodating portion 21 is formed in the braking portion b, and one small and thin rotary damper 22 is disposed in the accommodating portion 21. As shown in FIG. 7A, the rotary damper 22 has a large-diameter gear 24 formed on the outer periphery of the main body 23, and a small-diameter gear 25 provided coaxially with the main body 23. The small-diameter gear 25 is configured to be braked and rotatable with respect to the main body 23.

  Next, the driving part a and the braking part b are operatively connected via a one-way mechanism. That is, as shown in FIG. 7A, the height of the accommodating portion 21 is smaller than the diameter of the rotary damper 22, and the small diameter gear 25 is formed so as to always mesh with the annular gear 10 of the reel 7. . In addition, the width of the accommodating portion 21 is slightly larger than that of the rotary damper 22, and a protrusion 20 is formed at an intermediate portion on one side thereof.

  According to the one-way mechanism, when the reel 7 rotates in the A direction, the rotary damper 22 meshed with the annular gear 10 is moved to one side of the housing portion 21 and idles. On the other hand, when the reel 7 rotates in the B direction as shown in FIG. 4B, the rotary damper 22 is moved to the other side of the housing portion 21 and the large-diameter gear 24 is engaged with the protrusion 20. Cannot rotate.

  Therefore, as shown in FIG. 1A, when the sliding door 3 moves in the opening direction and the wire 5 is fed out from the main body case 2, the reel 7 rotates in the A direction, and the mainspring 8 is tightened. At this time, the rotary damper 22 idles.

  On the other hand, as shown in FIG. 5B, when the force is released after the sliding door 3 is opened, the mainspring 8 is wound up by the restoring force, so that the reel 7 rotates in the B direction. At this time, the rotary damper 22 is moved to the opposite side, and the large-diameter gear 24 engages with the protrusion 20 of the accommodating portion 21 and cannot rotate. Since the small-diameter gear 25 rotates in a braking state, the rotation of the reel 7 is also suppressed and rotates slowly. Accordingly, the sliding door 3 returns at a low speed, and the sliding door 3 gently closes against the sliding door frame 4 and closes.

  The number of rotary dampers is not limited to one, and a plurality of rotary dampers may be arranged.

  Moreover, the structure which forms the annular gearwheel of the reel 7 in the outer peripheral side, and arrange | positions a rotary damper in the outer peripheral side may be sufficient.

  Further, the rotary damper may be of a type incorporating a one-way clutch mechanism. In this case, the main body of the rotary damper may be fixed to the main body case, and the gear formed on the output shaft may be meshed with the annular gear of the reel.

  As described above, the sliding door closer 1 has a structure in which the braking portion b is disposed in the axial direction of the support shaft 6 of the driving portion a, and the driving portion a and the braking portion b can be miniaturized. Therefore, the driving unit a and the braking unit b can be made much more compact than the conventional configuration in which the driving unit a and the braking unit b are arranged in parallel. Therefore, the appearance of the sliding door 3 is not impaired. The conventional closer 1 also has a pulley disposed on the braking part b, and is not thin. Therefore, even if it is the structure which arranged the drive part a and the braking part b in parallel, the thickness can be restrained to the same extent as the conventional one.

  In addition, since it is fed directly from the wire reel 7, it does not rub like the conventional closer 1, which improves durability and does not generate abnormal noise during operation. Never give.

  In addition, when attaching a closer to a sliding door or a sliding door frame, it is not limited to the example which fixes the main body case of a closer to a sliding door and fixes the edge part of a wire to a sliding door frame like the above-mentioned embodiment. For example, the main body case may be fixed to the sliding door frame, and the tip (hook) of the wire may be fixed to the sliding door. Alternatively, the main body case may be built in the sliding door and the end of the wire may be attached to the sliding door frame. .

(A) (b) is a usage condition explanatory drawing of the closer for sliding doors concerning this invention. It is a longitudinal cross-sectional view of the said closer. It is sectional drawing on the XX line of FIG. It is a perspective view of an annular rotor. (A) and (b) are a one-way mechanism and its operation | movement figure. It is a longitudinal cross-sectional view of a closer using another braking part. (A) and (b) are a one-way mechanism and its operation | movement figure.

Explanation of symbols

a drive part b brake part 2 body case 5 wire 6 spindle 7 reel 8 spring 13 ring rotor 17 floating gear 22 rotary damper

Claims (4)

Provided is a drive unit having a reel around which a wire is wound in a main body case, a spring having one end engaged with the reel and the other end fixed to a support shaft, and a braking unit having a damper mechanism. And one of the main body case is attached to the sliding door and the other is attached to the sliding door frame.When the sliding door is opened, the wire is drawn out from the reel and the mainspring is wound, and the opened sliding door is the resistance of the damper mechanism of the braking portion by the restoring force of the mainspring. In the door closer that closes the sliding door by rewinding the wire to the reel of the driving unit against
A sliding door closer characterized in that a braking portion is arranged in an axial direction of a support shaft of the driving portion, and the driving portion and the braking portion are operatively connected via a one-way mechanism.   The sliding door closer according to claim 1, wherein the braking portion is configured by a damper mechanism including an annular rotor.   An annular gear is formed on one side of the reel of the wire, the damper mechanism is disposed on the outer peripheral side or inner peripheral side of the annular gear, and the annular gear and the annular rotor are operatively connected via the one-way mechanism. The closing door closer according to claim 2, wherein The sliding door closer according to claim 1, wherein the braking portion is constituted by a rotary damper.

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