JP2016153552A - Braking device for sliding door - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a braking device for a sliding door, which can adjust the attachment height of a rack for braking opening.SOLUTION: A braking device for a sliding door includes: braking means 10 for imparting rotational resistance to an input shaft; a pinion 13 that is attached to the input shaft; a closing braking rack 11 that is meshed with the pinion 13 before the sliding door 1 is closed; and an opening braking rack 12 that is meshed with the pinion 13 when the sliding door 1 is opened. In addition, the braking device for the sliding door comprises rack lifting/lowering means 20, 30 and 40.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a self-closing type sliding door braking device.

  As the sliding door device, a self-closing type in which the sliding door is automatically closed is already known. In this type of sliding door device, a closing force generating means is provided between the sliding door and a member (sliding door frame) fixed at a predetermined position, and the opened sliding door is automatically operated by the urging force of the closing force generating means. It is configured to be closed automatically. As the closing force generating means, a mainspring spring, a coil spring, or a weight that is biased in the closing direction is used to pull the sliding door in the closing direction due to the weight of the weight, or the wheel provided on the sliding door is inclined slightly downward on the closing direction side. It is known that it is mounted on a rail so as to be able to roll and is automatically closed by its own weight.

  In such a sliding door device, when the sliding door is closed, the sliding door is prevented from causing damage or noise to the sliding door or the member at the closed position due to the impact of the sliding door strongly contacting the member such as the frame of the sliding door frame. In addition, a braking device is provided. Such a braking device includes a pinion that is externally fitted to an input shaft of a braking means that is fixed to the sliding door side, and a closing brake that is fixed to the sliding door frame side so as to mesh with the pinion and apply a predetermined torque to the pinion. With a rack.

  According to this sliding door device, since the pinion meshes with the closing braking rack and the input shaft is rotated while being braked before the sliding door is completely closed, the closing operation of the sliding door is braked. In this case, the sliding door does not come into strong contact with the member at the closed location, and it is possible to prevent the sliding door and the member at the closed location from being damaged or generating noise.

  By the way, in a sliding door apparatus, when fully opening a sliding door, a sliding door will contact | abut strongly to the members which control opening positions, such as a frame of an open side.

  As a means for coping with this, an open braking rack or the like is further provided and braking is performed when the sliding door is fully opened, so that the sliding door can be prevented from coming into strong contact with the opening position regulating member.

  A sliding door device that brakes closing and opening of a sliding door by separately engaging a closing brake rack and an opening braking rack with a pinion of one braking device is known as disclosed in Patent Document 1 below. It is.

  In the sliding door device of Patent Document 1, the closing brake rack is integrally attached to an inclined frame having rails, and the open braking rack is located at a symmetrical position on the opposite side of the closing brake rack via the auxiliary frame. Be placed. Since the open braking rack is disposed at a position away from the reference rail, there may be a problem in meshing with the pinion.

Japanese Patent No. 2730871

  SUMMARY OF THE INVENTION Therefore, the present invention has been made in view of the above-mentioned conventional problems, and provides a sliding door braking device capable of adjusting the mounting height of the open braking rack in order to securely mesh the open braking rack and the pinion. Is an issue.

  The present invention has been made to solve the above problems, and a sliding door braking device according to the present invention includes a braking means 10 for imparting rotational resistance to an input shaft, and a pinion 13 attached to the input shaft. And a door brake rack 11 that engages with the pinion 13 before the sliding door 1 is closed and an opening braking rack 12 that engages with the pinion 13 when the sliding door 1 is opened. Rack lifting means 20, 30, 40 for adjusting the mounting height of the rack 12 are provided.

  The rack elevating means 20 preferably includes a height adjusting eccentric pin 22 for adjusting the height of the open braking rack 12.

  The rack lifting / lowering means 30 preferably includes a height adjusting rack 32a for adjusting the height of the open braking rack 12.

  The rack lifting / lowering means 40 preferably includes a height adjusting bolt 42 for adjusting the height of the open braking rack 12.

  The rack elevating means 20 and 30 preferably include a parallel guide 50 for adjusting the height of the open braking rack 12 in parallel to the opening / closing direction of the sliding door 1.

  Moreover, it is preferable that the said rack raising / lowering means 20, 30, 40 is provided with the holding member 60 which hold | maintains the sliding door 1 in a fully open position.

  As described above, in the sliding door braking apparatus according to the present invention, the open braking rack and the pinion can be reliably engaged by adjusting the mounting height of the open braking rack.

It is a schematic front view of 1st Embodiment of this invention, (a) shows the state of the fully closed position of a sliding door, (b) shows the state of a sliding door in a fully open position. It is a schematic front view of the rack raising / lowering means in 1st Embodiment of this invention. FIG. 3 is a schematic cross-sectional view taken along a cross-section AA in FIG. 2, (a) shows a state where the rack guide is lowered, and (b) shows a state where the rack guide is raised. It is a schematic front view which shows the holding member of the sliding door in 1st Embodiment of this invention, (a) shows the state before a sliding door is latched by a holding member, (b) is a sliding door latched by a holding member. The state that has been done. It is a schematic front view of the rack raising / lowering means in 2nd Embodiment of this invention. 6A and 6B are schematic cross-sectional views taken along a section B-B in FIG. 5, in which FIG. 5A shows a state where the rack guide is lowered, and FIG. 5B shows a state where the rack guide is raised. It is a schematic front view of the rack raising / lowering means in 3rd Embodiment of this invention. It is a schematic side view in the arrow CC of FIG. 7, (a) shows the state where the rack guide is falling, (b) shows the state where the rack guide is rising.

  First, a first embodiment of the present invention will be described with reference to FIGS. In FIG. 1, reference numeral 1 denotes a sliding door of an upper suspension type that is suspended from a sliding door frame 2 so as to be movable in the left-right direction. In this embodiment, a sliding door for right opening is illustrated, but it goes without saying that it may be a sliding door for left opening. The sliding door frame 2 is formed by connecting the upper side of the closing side frame 3 and the opening side frame 4 of the sliding door 1 with an upper horizontal frame 5 and the lower side with a lower horizontal frame (not shown). .

  A wheel 7 is rotatably supported on the upper edge of the sliding door 1 via a plurality of brackets 6a and 6b extending upward.

  An inclined frame 8 having a substantially L-shaped cross section is fixed to the upper horizontal frame 5 in a posture in which the door end side (closed side frame 3 side) is slightly inclined downward, and a rail portion 9 formed on the inclined frame 8. A wheel 7 is placed on the wheel so as to be freely rollable. Therefore, when the wheel 7 rolls on the inclined rail portion 9 to the door end side by the weight of the sliding door 1, the sliding door 1 is automatically closed and automatically returns to the original closing position. The inclined frame 8 constitutes a closing force generating means.

  In the sliding door braking device according to the present invention, first, the braking means 10 is provided on the bracket 6a on the door end side. The braking means 10 applies a braking force (rotational resistance) to an input shaft (not shown) supported so as to be rotatable forward and backward. On the input shaft, a pinion 13 that meshes with a closing brake rack 11 disposed on the door end side of the inclined frame 8 and an open braking rack 12 disposed symmetrically with the closing brake rack 11 on the door bottom side. Is attached. A one-way clutch (not shown) is mounted between the input shaft and the pinion 13. In the one-way clutch, when the pinion 13 rotates forward in the closing direction of the sliding door 1, the pinion 13 rotates the input shaft to transmit torque, and conversely, when the pinion 13 rotates backward in the door opening direction. The pinion 13 is idled to be attached in a direction to interrupt the torque transmission of the input shaft. The structure of the braking device is arbitrary as long as such a braking function can be exhibited.

  As shown in FIG. 1a, when the pinion 13 meshes with the closing braking rack 11, a braking force is generated when the sliding door 1 moves in the closing direction, and conversely, when the sliding door 1 moves in the opening direction, the one-way clutch acts. Since the pinion 13 idles, no braking force is generated. Further, as shown in FIG. 1b, when the pinion 13 is engaged with the open braking rack 12, a braking force is generated when the sliding door 1 moves in the door opening direction, and on the contrary, when the sliding door 1 moves in the door closing direction, the one-way clutch is operated. As a result, the pinion 13 rotates idly, so that no braking force is generated.

  Thereby, a braking function acts only when the sliding door 1 is closed or opened, and in other cases, the sliding door 1 can be opened and closed with a light force without feeling a sense of resistance.

  The sliding door braking apparatus according to the present invention includes a rack lifting / lowering means 20 that supports the open braking rack 12 to be lifted and lowered. 2 and 3 show details of the rack lifting / lowering means 20. The rack lifting / lowering means 20 includes an auxiliary frame 21 fixed to the upper horizontal frame 5, a height adjustment eccentric pin 22 rotatably locked to the auxiliary frame 21, and a height adjustment eccentric pin 22 with respect to the auxiliary frame 21. And a rack guide 24 supported by a screw 23 so as to be movable up and down.

  The auxiliary frame 21 is a plate-like member, and includes a bearing portion 21a (see FIG. 3) that supports the height adjusting eccentric pin 22, and a female screw portion 21b (see FIG. 2) for fixing the rack guide 24. ing. The bearing portion 21a is provided at two locations, and the height adjusting eccentric pin 22 is pivotally supported on each of the bearing portions 21a. In addition, female screw portions 21b are also provided at two locations, and screws 23 are screwed into each. A round seat 21c (see FIG. 3) is formed on the upper horizontal frame 5 side of the auxiliary frame 21. The round seat portion 21c is a space formed in a substantially cylindrical shape from a surface in contact with the upper horizontal frame 5 of the auxiliary frame 21 to a certain depth.

  As shown in FIG. 3, the height adjusting eccentric pin 22 includes a rotating shaft portion 22a, an eccentric portion 22b, and a tool engaging portion 22c. The rotating shaft portion 22a is inserted into the bearing portion 21a of the auxiliary frame 21 and is rotatably supported. The rotating shaft portion 22a is provided with a retaining ring groove 22d (see FIG. 3) and is located in the round seat portion 21c of the auxiliary frame 21. In this state, by engaging the retaining ring 25 with the retaining ring groove 22d, the height adjusting eccentric pin 22 is prevented from coming off from the bearing portion 21a. As shown in FIG. 3, the eccentric portion 22b has a shape larger in diameter than the hole diameter of the bearing portion 21a into which the rotary shaft portion 22a is inserted, and the height adjusting eccentric pin 22 cannot penetrate the bearing portion 21a. Therefore, the height adjusting eccentric pin 22 is rotatably locked to the auxiliary frame 21 so as to be sandwiched between the eccentric portion 22 b and the retaining ring 25. The tool engaging portion 22c is formed with a tool engaging groove 22e for rotating the height adjusting eccentric pin 22 with a tool such as a screwdriver.

  The rack guide 24 is supported so as to be slidable in the vertical direction on the auxiliary frame 21, and a sliding portion 24 a into which the eccentric portion 22 b of the height adjusting eccentric pin 22 is inserted and a long hole portion 24 b through which the screw 23 passes. (See FIG. 2). As shown in FIG. 2, when the height adjusting eccentric pin 22 is rotated, the sliding portion 24a opens and closes the sliding door 1 so that the rack guide 24 moves only up and down following the movement of the outer diameter of the eccentric portion 22b. It is formed horizontally long along. Further, a screw 23 passes through the long hole portion 24b, and the long hole portion 24b is formed in a vertically long shape along the lifting / lowering direction of the rack guide 24 so that the screw 23 does not hinder the lifting / lowering of the rack guide 24. Since the screw 23 is screwed into the female screw portion 21 b of the auxiliary frame 21, the rack guide 24 is fixed to the auxiliary frame 21 when the screw 23 is tightened.

  The rack raising / lowering means 20 includes a parallel guide 50 that makes the raising / lowering of the open braking rack 12 parallel to the opening / closing direction of the sliding door 1. As shown in FIG. 2, the parallel guide 50 includes a guide block 51 and an end surface 52 thereof.

  The guide block 51 is provided with two through holes (not shown) through which screws 53 pass. The screw 53 is screwed into a female screw portion (not shown) provided in the auxiliary frame 21, and the guide block 51 is fixed to the auxiliary frame 21 by tightening.

  Next, adjustment of the mounting height of the release braking rack 12 will be described with reference to FIGS. 2 and 3a show a state in which the rack guide 24 is lowered. At this time, in the eccentric portion 22b of the two height adjusting eccentric pins 22, the protruding portion that protrudes most in the radial direction with respect to the rotating shaft portion 22a is directed downward. From this state, the screw 23 is first loosened to release the rack guide 24 from being fixed. Thereafter, the two height adjusting eccentric pins 22 are rotated to either one of the left and right sides, and the protrusions are gradually directed upward. As the sliding portion 24a follows the movement of the eccentric portion 22b, the rack guide 24 gradually rises. At this time, it is necessary to rotate the two height adjusting eccentric pins 22 while synchronizing both rotation angles, such as rotating both at the same time or rotating one of them alternately little by little. This is because the rack guide 24 is regulated so as to move parallel to the ascending / descending direction due to the relationship between the parallel guide 50 and the screw 23 and the long hole portion 24b, so that only one height adjusting eccentric pin 22 is rotated. This is because the rack guide 24 interferes with an attempt to move diagonally. When the two height adjusting eccentric pins 22 are rotated 180 degrees and the protrusions face upward, the rack guide 24 is in the highest position (FIG. 3b). On the other hand, when it is lowered, it may be rotated so that the protrusions of the two height adjusting eccentric pins 22 face downward, as opposed to when it is raised. Thus, when the raising / lowering position of the rack guide 24 is determined, the screw 23 is tightened to fix the rack guide 24 to the auxiliary frame 21. At this time, the rack guide 24 can be fixed in a state parallel to the opening / closing direction of the sliding door 1 by fixing the screws 23 while bringing the end surface 52 of the rack block 24 into contact with the end surface 52 of the guide block 51. By performing such adjustment in a state where the open braking rack 12 and the pinion 13 are engaged with each other, the engagement can be adjusted.

  The open braking rack 12 is slidably held in a groove 12a (see FIG. 3) formed in the rack guide 24, and can be fixed at an arbitrary position by a fixing member (not shown). By doing so, the position where the open braking rack 12 and the pinion 13 are engaged can be adjusted, and the timing at which the braking force is generated can be adjusted.

  The sliding door braking device according to the present invention has a holding member 60. As shown in FIGS. 2 to 4, the holding member 60 includes a plate spring 61 fixed to the rack guide 24 and a convex portion 62 (see FIGS. 2 and 4) provided on the plate spring 61. . Further, a stop roller 63 (see FIG. 4) is provided on the sliding door 1 as an engaging member that engages with the holding member 60.

  A specific operation of the holding member 60 will be described with reference to FIG. When trying to open the sliding door 1 to the fully open position, first, the convex portion 62 of the leaf spring 61 and the stop roller 63 come into contact with each other (FIG. 4a). When the sliding door 1 is moved in the door opening direction as it is, the leaf spring 61 is elastically deformed, and the stop roller 63 moves to the locking position while pushing up the convex portion 62 of the leaf spring 61 (FIG. 4b). Since the elastic force of the leaf spring 61 is larger than the closing force of the sliding door 1 at the locking position, the sliding door 1 is held in a fully opened state. To release the holding state, the sliding door 1 may be moved in the closing direction by exceeding the elastic force of the leaf spring 61 by the same action.

  2 to 4, the holding member 60 is slidably held in a groove 67 (see FIG. 3) of the rack guide 24 via a bracket 64 and a sliding member 65 (see FIG. 3), and is fixed by a fixing bolt 66. It can be fixed at any position.

  The plate spring 61 is provided with two through holes (not shown) through which the fixing bolts 68 pass. The fixing bolt 68 is screwed into a female screw portion (not shown) provided on the bracket 64, and the plate spring 61 is fixed to the bracket 64 when tightened. The bracket 64 is provided with two through holes (not shown) through which the fixing bolts 66 pass. The fixing bolt 66 is screwed into a female screw portion (not shown) provided on the sliding member 65, and the bracket 64 is fixed to the sliding member 65 when tightened. At this time, the bracket 64 and the sliding member 65 are fixed so as to sandwich the mouth of the groove portion 67 of the rack guide 24, so that the holding member 60 is fixed to the rack guide 24. In this way, the position of the holding member 60 can be adjusted.

  Next, the sliding door apparatus of 2nd Embodiment of this invention is demonstrated. 5 and 6 show the rack lifting / lowering means 30 in the second embodiment of the present invention. The rack lifting / lowering means 30 is arranged in the same manner as the rack lifting / lowering means 20 of the first embodiment, and the same members are denoted by the same reference numerals and description thereof is omitted.

  The rack lifting / lowering means 30 includes an auxiliary frame 31 fixed to the upper horizontal frame 5, a rack guide 32 supported to be movable up and down with respect to the auxiliary frame 31, and a height adjustment rack 32 a provided integrally with the rack guide 32. And a positioning rack 33 that meshes with the height adjustment rack 32a.

  The auxiliary frame 31 is a plate-like member and includes a female screw portion 31 a for fixing the rack guide 32 and the positioning rack 33. The female screw portion 31a is provided at two locations, and the screw 34 is screwed into each.

  The rack guide 32 is slidably supported on the auxiliary frame 31, and includes a height adjustment rack 32a and a long hole portion 32b. The height adjustment rack 32 a is formed so as to extend to the upper end of the rack guide 32 along the auxiliary frame 31. Further, the height adjusting rack 32a has a plurality of projections and depressions that mesh with the positioning rack 33 toward the front side of the drawing in FIG. The long hole portion 32b is formed in the height adjustment rack 32a, and the screw 34 passes therethrough. The long hole portion 32 b is formed in a vertically long shape along the raising / lowering direction of the rack guide 32 so that the screw 34 does not hinder the vertical movement of the rack guide 32.

  The positioning rack 33 has a plurality of projections and depressions meshing with the height adjustment rack 32a and a through hole 33a through which the screw 34 passes.

  Next, adjustment of the mounting height of the open braking rack 12 will be described with reference to FIGS. 5 and 6a show a state where the rack guide 32 is lowered to the lowest. At this time, the rack guide 32 is fixed by screws 34 such that the height adjustment rack 32 a is sandwiched between the auxiliary frame 31 and the positioning rack 33. In order to raise the rack guide 32, first the screws 34 are loosened and the positioning rack 33 is removed. In this state, the rack guide 32 is raised, the mesh between the height adjusting rack 32a and the positioning rack 33 is shifted, and the positioning rack 33 is attached again. By doing so, the rack guide 32 is raised by the amount of disengagement (FIG. 6b). In order to lower the rack guide 32, this procedure may be reversed. By performing such adjustment in a state where the open braking rack 12 and the pinion 13 are engaged with each other, the engagement can be adjusted.

  Further, by providing a rubber sheet (not shown), paint, or the like (not shown) on the surface where the height adjusting rack 32a and the positioning rack 33 mesh, it is possible to prevent the rack guide 32 from being displaced or abnormal noise. .

  Next, the sliding door apparatus of 3rd Embodiment of this invention is demonstrated. 7 and 8 show the rack lifting / lowering means 40 in the third embodiment of the present invention. The rack lifting / lowering means 40 is arranged in the same manner as the rack lifting / lowering means 20 of the first embodiment, and the same members are denoted by the same reference numerals and description thereof is omitted.

  The rack lifting / lowering means 40 can be lifted / lowered with respect to the auxiliary frame 41 via the height adjusting bolt 42, the auxiliary frame 41 fixed to the upper horizontal frame 5, the height adjusting bolt 42 screwed to the auxiliary frame 41. And a rack guide 43 supported by the rack.

  The auxiliary frame 41 is a plate-like member, and has a protruding portion 41a (see FIG. 8) that is bent in a substantially L-shaped cross section toward the right of the drawing in FIG. The protruding portion 41a has two female screw portions 41b (see FIG. 8), and the height adjusting bolt 42 is screwed into each.

  The rack guide 43 includes a space having a substantially concave cross section, a recess 43a (see FIG. 8), and a through hole 43b (see FIG. 8) through which the height adjusting bolt 42 passes. The protrusion 41a of the auxiliary frame 41 is accommodated in the recess 43a. Further, the through hole 43b and the female screw portion 41b are arranged so as to be aligned on the same axis line in a state where the protruding portion 41a is accommodated in the concave portion 43a.

  The height adjusting bolt 42 is attached by being screwed into the female screw portion 41b through the through hole 43b in a state where the protruding portion 41a is accommodated in the concave portion 43a. At this time, the retaining ring 44 (see FIG. 8) is attached to the height adjusting bolt 42, so that the height adjusting bolt 42 is rotatably locked to the rack guide 43. When the height adjustment bolt 42 is rotated, the height adjustment bolt 42 moves up and down by the screw action with the female screw portion 41b. Since the height adjustment bolt 42 is locked to the rack guide 43, the rack guide 43 also moves up and down as the height adjustment bolt 42 moves up and down. In this embodiment, the screw action of the height adjusting bolt 42 and the female screw portion 41b is a right-handed screw relationship.

  Next, adjustment of the mounting height of the release braking rack 12 will be described with reference to FIGS. 7 and 8a show a state where the rack guide 43 is lowered to the lowest. At this time, in order to raise the rack guide 43, the two height adjusting bolts 42 are simultaneously rotated in the counterclockwise direction 45 (see FIG. 8a), or one of them is alternately rotated little by little. Then, the height adjusting bolt 42 is raised by the screw action, and the rack guide 43 locked to the height adjusting bolt 42 is also raised together. If the height adjusting bolt 42 is rotated as it is, the projecting portion 41a comes into contact with the wall surface of the recessed portion 43a and cannot be raised. This position is the highest position of the rack guide 43 (FIG. 8b). In order to lower the rack guide 43, the two height adjustment bolts 42 may be rotated clockwise (see FIG. 8b). By performing such adjustment in a state where the open braking rack 12 and the pinion 13 are engaged with each other, the engagement can be adjusted.

  As mentioned above, although preferred embodiment of this invention was described, the technical scope of this invention is not limited to the range as described in the said embodiment. Various modifications or improvements can be added to the embodiment. It is apparent from the description of the scope of claims that embodiments with such changes or improvements can be included in the technical scope of the present invention.

  For example, it is possible to raise the open braking rack 12 to a position where it does not mesh with the pinion 13 by increasing the height adjustment width of the rack elevating means 20, 30, 40. With this configuration, the braking function when the sliding door is opened can be arbitrarily released.

1: Sliding door 2: Sliding door frame 3: Side wall frame 4: Open side wall frame 5: Upper horizontal frame 6a: Bracket 6b: Bracket 7: Wheel 8: Inclined frame 9: Rail part 10: Braking means 11: Rack for closing braking 12: Open braking rack 12a: Groove portion 13: Pinion 20: Rack lifting means 21: Auxiliary frame 21a: Bearing portion 21b: Female thread portion 21c: Round seat portion 22: Height adjusting eccentric pin 22a: Rotating shaft portion 22b: Eccentricity Part 22c: Tool engaging part 22d: Retaining ring groove 22e: Tool engaging groove 23: Screw 24: Rack guide 24a: Sliding part 24b: Long hole part 25: Retaining ring 30: Rack lifting means 31: Auxiliary frame 31a: Female thread part 32: Rack guide 32a: Height adjustment rack 32b: Long hole part 33: Positioning rack 33a: Through hole 34: Screw 40: Rack lifting means 41: Supplementary Frame 41a: Protruding portion 41b: Female screw portion 42: Height adjusting bolt 43: Rack guide 43a: Recess 43b: Through hole 44: Retaining ring 45: Counterclockwise direction 46: Clockwise direction 50: Parallel guide 51: Guide block 52: End face 53: Screw 60: Holding member 61: Leaf spring 62: Protruding portion 63: Stop roller 64: Bracket 65: Sliding member 66: Fixing bolt 67: Groove 68: Fixing bolt

Claims (6)

  Braking means for imparting rotational resistance to the input shaft, a pinion attached to the input shaft, a closed braking rack that engages with the pinion before the sliding door is closed, and a pinion that engages with the pinion when the sliding door is opened A sliding door braking device having a matching open braking rack, comprising: rack lifting and lowering means for adjusting a mounting height of the open braking rack.   The sliding door braking device according to claim 1, wherein the rack elevating means includes a height adjusting eccentric pin for adjusting a height of the open braking rack.   The sliding door braking device according to claim 1, wherein the rack elevating means includes a height adjusting rack for adjusting a height of the open braking rack.   The sliding door braking device according to claim 1, wherein the rack elevating means includes a height adjusting bolt for adjusting a height of the open braking rack.   The said rack raising / lowering means was equipped with the parallel guide for adjusting the height of the said open brake rack in parallel with the opening-and-closing direction of a sliding door, The Claims 1-3 characterized by the above-mentioned. Sliding door braking device.   The said rack raising / lowering means is equipped with the holding member which hold | maintains a sliding door in a fully open position, The braking device of the sliding door as described in any one of Claims 1-5 characterized by the above-mentioned.

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