JP2009293336A - Damping device for sliding door - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a damping device for a sliding door which can prevent damage of a tooth chip and generation of a noise at a meshing start end of a rack gear and a pinion. <P>SOLUTION: In the damping device for a sliding door comprising the pinion 11 mounted on the rotary shaft 10a of a rotational damping mechanism 10 making damping power act at least in one rotation direction and a rack gear 12 meshing with the pinion 11, a compressible elastic member 14 is arranged between the mounting surface 12a of the rack gear 12 and an arranging surface 13a on which the rack gear 12 is arranged, and then the rack gear 12 is installed so that at least the meshing start end T of the rack gear 12 with the pinion 11 can move in a direction spacing from the pinion 11 when meshing with the pinion 11. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a sliding door braking device, and more particularly to a sliding door braking device using a rotary braking mechanism in which a braking force is applied in at least one rotation direction.

  Conventionally, as a sliding door braking device, a sliding door braking device 50 as shown in FIG. 5 is used.

  The braking device 50 for the sliding door is applied to a sliding door device provided with a traveling rail 6 on which the traveling wheels 3a and 3b attached via brackets 5a and 5b are mounted on the upper portion of the sliding door 4 and the sliding door 4 is suspended. Then, the pinion 52 is attached to the rotating shaft 51a of the rotary braking mechanism 51 which is arranged on the upper portion of the sliding door 4, for example, the bracket 5a so that the braking force is applied in at least one rotation direction. A rack gear 53 that meshes with the pinion 52 on the member 2 side) is arranged so as to mesh with the pinion 52 from the vicinity of the closed position of the sliding door 4.

  The pinion 52 employs, for example, a so-called one-way clutch in which the braking action does not work when the sliding door moves in the opening direction from the closed state, and the braking action works only when the sliding door moves in the closing direction from the opened state. In the example shown in FIG. 5, when the teeth of the rack gear 53 that meshes with the pinion 52 are arranged in the upward direction, braking is performed when the pinion 52 rotates in the counterclockwise direction.

  By the way, in the conventional sliding door braking device 50, the position of the tooth tip of the pinion 52 when the pinion 52 and the rack gear 53 mesh with each other is not constant, so the pinion 52 and the rack gear 53 do not mesh well with the pinion 52. There is a problem that the tooth tips of the rack gear 53 collide with each other, and either or both of the tooth tips are damaged or abnormal noise is generated.

In order to deal with such a problem, as shown in FIG. 6, a cushion piece 53 a made of a material whose hardness is lower than that of the rack gear 53 is integrally formed at the engagement start end T of the rack gear 53 with the pinion 52. In addition, when the pinion 52 and the rack gear 53 are not smoothly meshed with each other by attachment or the like, a structure that cushions the shock by bending the cushion piece 53a has been proposed (see, for example, Patent Document 1).
JP 2004-52297 A

  However, when the cushion piece 53a is attached, the hardness conversion portion between the cushion piece 53a and the rack gear 53 and the adhesion portion of the rack gear 53 may be damaged due to secular change or repeated impact from the pinion 52, When the tooth tip of the pinion 52 bites the damaged cushion piece 53a, or when the cushion piece 53a breaks and comes off, the hard part of the rack gear 53 becomes the engagement start end T with the pinion 52, A new problem arises that either or both of the tooth tips are damaged or abnormal noise is generated.

  In view of the problems of the conventional sliding door braking device, the present invention provides a sliding door braking device capable of preventing tooth tip breakage and abnormal noise at the meshing start end of the rack gear and the pinion. For the purpose.

  In order to achieve the above object, a sliding door braking device according to the present invention includes a pinion attached to a rotating shaft of a rotary braking mechanism in which a braking force is applied in at least one rotation direction, and a rack gear meshing with the pinion. When the rack gear is engaged with the pinion, the rack gear mounting surface and the rack gear are arranged so that at least the engagement start end of the rack gear with the pinion can be moved away from the pinion. It is characterized in that a compressible elastic member is disposed between and attached to the disposed surface.

  In this case, the compressible elastic member can be formed of a porous elastomer.

  In addition, an adjusting member for adjusting the initial compression amount of the compressible elastic member can be provided.

  According to the sliding door braking device of the present invention, when the rack gear is engaged with the pinion, at least the engagement start end of the rack gear with the pinion is movable in a direction away from the pinion. Since the compressible elastic member is arranged and attached between the rack gear and the arrangement surface on which the rack gear is arranged, the rack gear remains in an integral structure, and the pinion tooth tip of the rack gear is at the mesh gear start end. The impact that occurs when the mesh gear does not match the tooth tip and does not mesh is mitigated by the rack gear meshing start end moving away from the pinion to prevent tooth tip breakage and noise. Can do.

  Further, when the compressible elastic member is formed of a porous elastomer, the compressible elastic member can be configured using an inexpensive material.

  In addition, when the adjustment member that adjusts the initial compression amount of the compressible elastic member is arranged, it is optimal for the meshing state of the rack and pinion arranged on the sliding door frame member on the sliding door and the fixed side. The initial compression amount can be adjusted.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a sliding door braking device according to the present invention will be described below with reference to the drawings.

1 to 4 show an embodiment of a sliding door braking device of the present invention.
The sliding door braking device 1 is mainly applied to a self-closing type sliding door device. As in this embodiment, the sliding door braking device 1 is arranged on the traveling rail 6 disposed on the upper portion of the sliding door frame member 2 and inclined in the closing direction. In addition to the sliding door type sliding door device on which the traveling wheels 3a and 3b disposed on the front and rear of the upper and lower sides via brackets 5a and 5b are mounted, the traveling rail 6 is disposed without being inclined, or the lower surface of the sliding door 4 It is also possible to apply the sliding door in which the door wheel arranged on the floor is run on the rail laid on the floor surface to a sliding door device in which the sliding door 4 is urged in the closing direction with a wire having a weight attached to the tip. In addition, the present invention can be applied to a sliding door device that does not have a self-closing function.

  This sliding door braking device 1 is a sliding door composed of a pinion 11 attached to a rotating shaft 10a of a rotary braking mechanism 10 in which a braking force is applied in at least one rotational direction, and a rack gear 12 meshing with the pinion 11. In the braking device, when the rack gear 12 is meshed with the pinion 11, at least the meshing start end T of the rack gear 12 with the pinion 11 can move in a direction away from the pinion 11. A compressible elastic member 14 is disposed and attached between 12a and a disposition surface 13a on which the rack gear 12 is disposed.

The rotary braking mechanism 10 employs a so-called one-way clutch in which a braking force is applied in at least one rotational direction.
In the rotary braking mechanism 10, a pinion 11 is attached to a rotary shaft 10a that controls rotation in one direction by a one-way clutch, and is arranged on the upper surface of the sliding door 4 via a flange.
The flange shows an example in which one end of a bracket 5a for fixing the traveling wheel 3a to the upper surface of the sliding door 4 is used instead of being fixed as shown in the figure, but is directly fixed to the upper surface of the sliding door 4 at a position different from the bracket 5a. It can also be configured as follows.

The rack gear 12 is disposed via a mounting member 13 at a position where it starts meshing with the pinion 11 immediately before the sliding door 4 is closed (FIG. 1A).
As shown in FIG. 3, the mounting member 13 is formed of a substantially C-shaped frame member having openings at both ends and having notches for projecting the teeth of the rack gear 12 on one surface, and the rack gear 12 is disposed. A plate-like compressible elastic member 14 is disposed on the surface 13 a and the rack gear 12 is attached via the compressible elastic member 14.

  In the present embodiment, the mounting member 13 provided with the rack gear 12 is disposed on the sliding door frame member 2, but the rack gear 12 is on the sliding door 4 side and the rotary brake mechanism 10 is on the sliding door frame member 2 side. Also, when the rack gear 12 is disposed on the sliding door frame member 2, the teeth of the rack gear 12 can be disposed in a direction facing downward.

  The method for fixing the rack gear 12 to the mounting member 13 is not particularly limited. In this embodiment, as shown in FIG. 3, the L-shaped holding members disposed at both ends of the opening of the mounting member 13. The member 15 is fixed to the attachment member 13 by fastening means such as screws, and is fixed so as to sandwich the rack gear 12.

  The place where the compressible elastic member 14 is disposed may be at least the engagement start end T with the pinion 11 of the rack gear 12, and is particularly possible at the end opposite to the engagement start end T and other portions. Although it is not necessary to attach via the compressible elastic member 14, a compressible elastic member can also be arrange | positioned similarly and an elastic member with a small amount to be compressed can also be arrange | positioned.

  The compressible elastic member 14 is used to alleviate the impact that occurs when the pinion 11 does not mesh with the rack gear 12 when the pinion 11 starts meshing with the rack gear 12. The engagement start end T of the rack gear 12 may be made of a material that can move in a direction away from the pinion 11, and in this embodiment, a porous elastomer, for example, a porous rubber (foam rubber) ) Is used.

  Furthermore, as shown in FIG. 3C to FIG. 3E, an adjustment member 16 that adjusts the initial compression amount of the compressible elastic member 14 can be provided.

  The adjusting member 16 is configured to press the bottom surface 14 a of the compressible elastic member 14 by a pressing portion 16 a protruding from the mounting surface 13 a of the mounting member 13, and is adjustable from the mounting surface 13 a of the mounting member 13. The distance L to the bottom surface 14a of the compressible elastic member 14 is varied by adjusting the protruding amount of the pressing portion 16a, and the initial compression amount of the compressible elastic member 14 is changed to change the compressible elastic member 14. Is adjusted to adjust the distance that the meshing start end T of the rack gear 12 moves in a direction away from the pinion 11.

  Further, as the compressible elastic member 14, in addition to a porous elastomer, a spring can be used as shown in FIG. 3 (f), and the spring is further changed depending on the protruding amount of the pressing portion 16 a of the adjusting member 16. The elastic force of the spring can be adjusted by changing the initial compression amount.

  When the sliding door braking device 1 moves the sliding door 4 to the closed state, the pinion 11 starts meshing with the rack gear 12 at the meshing start end T immediately before the sliding door 4 is brought into the closed state.

  At this time, as shown in FIG. 4A, when the positional relationship between the tooth tips of the pinion 11 and the rack gear 12 is poor and the pinion 11 does not smoothly start braking rotation, the pressing force from the pinion 11 in the arrow direction The compressible elastic member 14 is compressed by the partial pressure of P in the vertical direction, and the rack gear 12 moves to the position indicated by the solid line shown in FIG. 4B, thereby starting the engagement of the rack gear 12 and the pinion 11. It is possible to prevent the tooth tip from being damaged or abnormal noise at the end T.

  As mentioned above, although the braking device of the sliding door of the present invention was explained based on the example, the present invention is not limited to the composition indicated in the above-mentioned example, and the composition is suitably changed in the range which does not deviate from the meaning. It can be changed.

  Since the sliding door braking device of the present invention can prevent the tooth tip from being damaged and the generation of abnormal noise at the meshing start end of the rack gear and the pinion, it can be used for a sliding door device of a novel braking device, The existing sliding door device can be easily applied only by changing the rack gear mounting structure.

BRIEF DESCRIPTION OF THE DRAWINGS It is a front view of the partial cross section which shows the whole sliding door apparatus using the braking device of the sliding door of this invention, (a) shows the state immediately before a closed state, (b) shows a closed state. It is XX sectional drawing of FIG.1 (b) which shows the brake device. The rack gear mounting portion of the braking device is shown, (a) is a front view of a partial cross section, (b) is a side view of the same, and (c) is a front view of a partial cross section provided with an adjusting member, (D) is the same side view, (e) is a YY sectional view of (c), and (f) is a YY sectional view of (c) showing another embodiment of the adjusting member. FIG. 4 is a schematic diagram for explaining the movement of the rack gear of the braking device, where (a) shows a state in which the rack gear and the pinion have started meshing, and (b) shows a state in which the rack gear has moved. It is a partially cutaway front view which shows the braking device of the conventional sliding door. The other example of the meshing start end of the rack gear used for the braking device of the conventional sliding door is shown.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Sliding door braking device 2 Sliding door frame member 4 Sliding door 10 Rotary brake mechanism 10a Rotating shaft 11 Pinion 12 Rack gear 12a Rack gear mounting surface 13 Mounting member 13a Rack gear mounting surface 14 Compressible elastic member T Start of meshing end

Claims (3)

  In a sliding door braking device comprising a pinion attached to a rotating shaft of a rotary braking mechanism in which a braking force is applied in at least one rotational direction, and a rack gear meshing with the pinion, the rack gear is meshed with the pinion. In addition, a compressible elastic member is provided between the rack gear mounting surface and the rack gear mounting surface so that at least the engagement start end of the rack gear pinion can be moved away from the pinion. A braking device for a sliding door, characterized in that it is disposed and attached.   2. The sliding door braking device according to claim 1, wherein the compressible elastic member is made of a porous elastomer.   3. The sliding door braking device according to claim 1, further comprising an adjusting member for adjusting an initial compression amount of the compressible elastic member.

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