JP4519529B2 - Roller detachment prevention device for upper suspension type sliding door device - Google Patents

Description

  The present invention prevents a roller of an overhanging sliding door device in which a roller provided on an upper portion of a door body is slidably engaged with a guide rail from being separated from the guide rail due to the lift of the door body. The present invention relates to a detachment prevention device for use in an uplifting type sliding door device in which the number of door bodies is one or more.

In Patent Document 1 below, an overhanging door body having a roller engaged on a guide rail so as to be able to roll freely is openable and closable by rolling on the guide rail of the roller. A suspended sliding door device is shown. Further, this Patent Document 1 discloses a roller detachment prevention device for preventing a roller from being lifted from the guide rail due to a lift caused by some reason in the upper suspension door body suspended from the roller. It is shown on the drawing that it is provided in a suspension type sliding door device. This roller detachment prevention device arranges a belt-like member having upper and lower widths at a position of a door body below the guide rail, specifically, at a bracket position where a roller is attached, The belt-shaped member forming the structure prevents the roller from coming off from the guide rail by contacting the guide rail before the roller is disengaged from the guide rail when the door body is lifted. It has become.
JP 200270410 (FIGS. 2 and 4)

  Even when such a roller detachment prevention part is provided in the suspension type sliding door device and the roller detachment prevention part abuts against the guide rail and the detachment of the roller from the guide rail is prevented, the door body continues to open and close. May have. For this reason, even if the roller detachment preventing portion comes into contact with the guide rail, it is required to devise so that the contact does not hinder the smooth opening / closing movement of the door body.

  It is an object of the present invention to provide a roller detachment preventing device for an overhanging sliding door device that allows a door body to be smoothly opened and closed even when a roller detachment preventing portion abuts against a guide rail.

  A roller detachment preventing device for an upper suspension type sliding door device according to the present invention has at least one upper suspension door body having a roller engaged on a guide rail so as to be able to roll freely. The body is openable and closable by rolling on the guide rail of the roller, and the roller comes into contact with the guide rail before being released from engagement with the guide rail due to the lift of the door body. In the roller detachment prevention device for the upper suspension type sliding door device, the roller detachment prevention portion for preventing the roller from detaching from the guide rail is disposed at the position of the door body below the guide rail. The roller detachment preventing part is configured as a friction reducing part having a small frictional force with the guide rail.

  Since the roller separation preventing portion in the present invention is configured as a friction reducing portion having a small frictional force with the guide rail, the roller separation preventing portion comes into contact with the guide rail when the door body is lifted during opening and closing movement, and the door body is left as it is. Even if the opening / closing movement continues, a large frictional force is not generated between the roller separation preventing portion and the guide rail, and this contact does not hinder the smooth opening / closing movement of the door body. It can be smoothly opened and closed as specified.

  The roller detachment preventing portion may be of any structure, shape, and material as long as it is a friction reducing portion having a small frictional force with the guide rail.

  The first example is to configure the roller detachment preventing unit by rotatably arranging the rotating member on the door body. According to this, when the rotating member comes into contact with the guide rail due to the lifting of the door body that is being opened and closed, the rotating member is rotated, so that a large frictional force is generated between the rotating member and the guide rail. The door body can be smoothly opened and closed without being generated.

  In the second example, the roller detachment preventing portion is configured by disposing a friction reducing member formed of a material having a small frictional force with the guide rail on the door body at least during the opening / closing movement of the door body. It is to be. According to this, even if the friction reducing member comes into contact with the guide rail when the door body is lifted during opening and closing movement, the stationary friction reducing member is formed of a material having a small frictional force with the guide rail. A large frictional force is not generated between the reducing member and the guide rail, and the door body can be smoothly opened and closed.

  Such a friction reducing member may be fixedly disposed on the door body, or may be disposed so as to be attached or detached. According to the latter, even if the friction reducing member is worn or damaged, it can be replaced with a new friction reducing member.

  Further, such a friction reducing member can be formed of any material as long as the frictional force with the guide rail is small. For example, it may be a hard plastic such as polytetrafluoroethylene, nylon, vinyl chloride, ceramic, oil, An impregnated member or the like may be used.

  Of course, the rotating member as the roller detachment prevention unit described above may be attached to the door body and arranged so as to be removable, or may be arranged so as not to be attached and detached. The rotating member can be formed of any material such as metal or plastic.

  Further, in the present invention, the roller separation preventing portion may be disposed at a position where the roller can be prevented from separating from the guide rail by coming into contact with the guide rail before the roller body is lifted and disengaged from the engagement with the guide rail. The roller detachment preventing portion may be disposed on the upper surface of the door body, for example, but the door body is above the guide rail. In the case where it is configured to have a bracket attached with a roller that is movably engaged with the roller, it is preferable to arrange a roller detachment preventing portion on the bracket.

  According to this, since the bracket also serves as a member for arranging the roller detachment preventing portion, it is not necessary to perform special processing or the like for arranging the roller detachment preventing portion on the door body, and the door body main body is easily manufactured. It becomes.

  It should be noted that the roller detachment preventing portion may be disposed on the bracket in this manner. Alternatively, the roller detachment preventing portion may be disposed directly on the bracket, or the roller detachment preventing portion may be disposed on a member attached to the bracket. A roller detachment preventing portion may be indirectly arranged on the bracket.

  The above-described roller detachment prevention device for the upper suspension type sliding door device according to the present invention can be applied to an upper suspension type sliding door device in which the number of door bodies is one, and a plurality of upper suspension type sliding door devices are provided. It can also be applied to.

  The upper suspension type sliding door device having a plurality of door bodies may be a sliding type sliding door device or a sliding type sliding door device, and has both a sliding type and a drawing type function. A sliding door device may be used.

  In addition, the number of the roller detachment preventing portions for one door body is 1 for both the upper suspension type sliding door apparatus having one door body and the plurality of upper suspension type sliding door apparatuses. It may be a single piece or a plurality of pieces arranged in the opening / closing movement direction. Furthermore, with respect to the suspension type sliding door device having a plurality of door bodies, the roller detachment prevention portion may be provided only on one door body, or may be provided on all door bodies. You may provide in the some door body among door bodies.

  And the upper suspension type sliding door device is disposed in the door body thickness direction, and at least two first and second door bodies whose opening and closing movement directions are the same direction, and rollers of the first door body are provided. A first guide rail that is movably engaged and attached to a stationary member, and a second guide rail that is movably engaged with a roller of the second door body and attached to the first door body. In the case where the opening is closed by these door bodies when the second door body moves forward from the position of the first door body, a plurality of the doors are provided in the opening / closing movement direction of the first door body. Of the rollers of the first door body, the roller detachment preventing portion is preferably disposed at a position of the first door body on the opening side with respect to the roller disposed on the most closed side.

  According to this, in order to close the said opening part, the 2nd door body advances rather than the position of the 1st door body, and the 2nd guide rail which has reached the position where the tip part of the closing side has projected from the 1st door body Thus, the weight of the second door body acts on the first door body, whereby the opening side end portion (door end side end portion) of the first door body is centered on the roller disposed on the most closed side. Even when the roller is lifted, the roller detachment preventing portion abuts against the guide rail, so that it is possible to prevent other rollers excluding the roller arranged closest to the detachment from the guide rail. And in this invention, since this roller detachment prevention part is a friction reduction part with small frictional force with a guide rail, the 1st door body in which the edge part of the opening side was lifted can be smoothly opened and closed. it can.

  As described above, the upper suspension type sliding door device is disposed so as to be shifted in the thickness direction of the door body, and the first door body and at least two first and second door bodies whose opening and closing movement directions are the same direction. The first guide rail attached to the non-moving member and the second guide rail attached to the first door body so that the rollers of the second door body can roll freely. And when the opening is closed by these door bodies when the second door body moves forward from the position of the first door body, a plurality of opening and closing movement directions of the second door body are provided. All the rollers of the second door body provided may be slidably engaged on the second guide rail, and at least one of these rollers is placed on the first guide rail. And the remaining rollers are rolled onto the second guide rail. It may be.

  According to the latter, a part of the weight of the second door body is supported by the first guide rail, and only the remaining weight acts on the first door body via the second guide rail. Accordingly, the lifting force and the lifting amount of the opening side end portion of the first door body can be reduced.

  In addition, as described above, when there are at least two first and second door bodies that are displaced in the door body thickness direction as described above, the opening and closing movement directions of the first and second door bodies In order to make the same direction, at least one of the first door body and the second door body, the second door body that has been retracted to the position where the opening is opened is moved to the closed side by a predetermined distance. Sometimes, a locking member is provided in which the first door body and the second door body are connected and locked together, and when the second door body is moved further to the closing side, both door bodies are engaged with this engagement. The first door body and the second door body may be connected by an interlocking mechanism, and the first door body and the second door body may be connected at all times. With this interlocking mechanism, the first door body is a low-speed door body, the second door body is a high-speed door body, and these door bodies are interlocked and moved in the opening and closing direction. It may be so.

  In the present invention described above, the engagement relationship between the roller of the door body and the guide rail is that the roller has a groove extending over the entire circumference of the roller, and the protrusion formed on the entire length of the guide rail engages with this groove. Alternatively, the roller may have a circumferential protrusion extending over the entire circumference of the roller, and the circumferential protrusion may be engaged with a groove formed on the entire length of the guide rail, and the engagement form is arbitrary.

  According to the present invention, even if the roller detachment preventing portion contacts the guide rail, the contact does not hinder the smooth opening / closing movement of the door body, and the smooth movement of the door body can be ensured.

  EMBODIMENT OF THE INVENTION Below, the form for implementing this invention is demonstrated based on drawing. FIG. 1 is a front view showing the entire top-hung type sliding door device according to the present embodiment.

  As shown in FIG. 1, the sliding door device according to the present embodiment is a double sliding type sliding door device having two first door bodies 1 and second door bodies 2. These door bodies 1 and 2 open and close the opening 3 serving as an entrance between the hallway and the room in the building, and this opening 3 is a structure of the outer frame for the double sliding door device. One side of the space surrounded by the door-side vertical frame member 4, the upper horizontal frame member 5, the door-side vertical frame member 6, and the floor 7. It is formed by a space closer to the door tip (closed side) than the door pocket panel 8 forming the type door pocket.

  The 1st door body 1 and the 2nd door body 2 which open and close the opening part 3 by moving to the same direction are shifted | deviated and arrange | positioned in the thickness direction of these door bodies 1 and 2 (refer FIG. 8). When these door bodies 1 and 2 advance to the closing side and close the opening 3, the second door body 2 becomes the closing side and the position of the first door body 1 as shown in FIG. 1. Is a position shifted from the second door body 2 to the opening side (see FIG. 3). That is, when the second door body 2 moves forward from the position of the first door body 1, the opening 3 is closed by these door bodies 1 and 2. Further, when both door bodies 1 and 2 are opened and moved to the door bag panel 8 shown in FIG. 1, these door bodies 1 and 2 overlap in the thickness direction of these door bodies 1 and 2 and are in the retracted position. Reach (see FIG. 6).

  The inspector 5 having a length straddling between the two vertical frame members 4 and 6 shown in FIG. Normally, this horizontally long inspection port is closed by the cover 9, and the cover 9 is formed on the protruding piece 4 </ b> A of the vertical frame member 4 and the protruding piece 6 </ b> A of the vertical frame member 6. It is attached seamlessly 5 with set screws 10 and 11 screwed into the screw holes. By removing the cover 9, it is possible to perform inspection, maintenance, repair, and the like for the moving mechanism incorporated in the interior 5 to open and close the two door bodies 1 and 2.

  FIG. 2 is a front view of the moving mechanism shown with the cover 9 removed, and shows a state in which the two door bodies 1 and 2 close the opening 1 as shown in FIG. FIG. 3 is a plan view showing the moving mechanism at this time. Further, FIGS. 5 and 6 show the same views as FIGS. 2 and 3 when the two door bodies 1 and 2 reach the open side retracted position and open the opening 3. .

  8 is a sectional view taken along line S8-S8 in FIG. 5. As shown in FIG. 8, the side surface 5A of the invisible 5 opposite to the side on which the cover 9 is arranged has a reinforcing member. The first guide rail 21 is attached via the attachment member 12 that also serves as the above. The first guide rail 21 includes a base 21A that is coupled to the mounting member 12 and extends in the vertical direction, a lower side 21B that extends in the thickness direction of the doors 1 and 2 from the lower end of the base 21A, and the lower side 21B. It consists of a rising portion 21C rising from the tip.

  As can be seen from FIGS. 3 and 6, the first guide rail 21, which is an extruded product or a pultruded product made of aluminum alloy, has a length that extends over substantially the entire length of the intangible 5. As shown in FIGS. 3 and 6, two rollers 31 and 32 provided on the first guide rail 21 in the opening / closing movement direction of the first door body 1 are rotatably engaged. The rollers 31 and 32 provided in the upper part of the first door body 1 are connected to the main body of the first door body 1 via the bracket 13 shown in FIG. The bracket 13 attached to 1A (see FIG. 8) and to which the rollers 31 and 32 are rotatably attached constitutes a part of the first door body 1.

  The first door body 1 is guided by the first guide rail 21, in other words, the rollers 31 and 32 engaged on the rising portion 21 </ b> C of the first guide rail 21 are moved on the rising portion 21 </ b> C. By rolling, it can be freely opened and closed, and is a top-suspended door that is suspended from the first guide rail 21. As shown in FIGS. 3 and 6, the two guide rails 22 extending in the opening / closing movement direction of the door bodies 1, 2 are provided on the two brackets 13 of the first door body 1, similarly to the first guide rail 21. It is attached. As shown in FIG. 8, the second guide rail 22, which is an extruded product or a pultruded product made of an aluminum alloy, also has a base portion 22 </ b> A that extends in the vertical direction, like the first guide rail 21, and the base portion 22 </ b> A. The lower side portion 22B extending in the thickness direction of the door bodies 1 and 2 from the lower end of the door and the upright portion 22C rising from the tip of the lower side portion 22B. The base portion 22A is coupled to the bracket 13 of the first door body 1. Yes.

  FIG. 10 shows a front view of the first door body 1 and the second guide rails 22 attached to the two brackets 13 of the first door body 1.

  As shown in FIGS. 3 and 6, the second guide rail 22 includes two rollers 33 and 34 provided on the second door body 2 in the opening / closing movement direction of the second door body 2. An opening side (door bottom side) roller 34 is movably engaged, and a closing side (door end side) roller 33 is movably engaged with the first guide rail 21. Of the rollers 33 and 34, the roller 34 is attached to the upper portion of the door body 2A (see FIG. 8) of the second door body 2 via the bracket 13 shown in FIG. As can be seen from FIG. 6, the door of the second door body 2 is provided via a bracket 14 that has a dimension in the thickness direction of the door bodies 1 and 2 larger than that of the bracket 13 and extends over the second guide rail 22. It is attached to the upper part of the body main body 2A. This bracket 14 is also shown in FIG. 9, which is a sectional view taken along line S9-S9 in FIG.

  And the 2nd door body 2 is comprised like the 1st door body 1 including the rollers 33 and 34 arrange | positioned at the upper part, and the brackets 13 and 14 to which these rollers 33 and 34 were rotatably attached. Has been.

  Further, the second door body 2 is engaged with the first and second guide rails 21 and 22 by being guided by the first and second guide rails 21 and 22, in other words, on the upright portions 21 </ b> C and 22 </ b> C of the first and second guide rails 21 and 22. The rolling rollers 33 and 34 roll on the upright portions 21C and 22C so that the rollers 33 and 34 can be freely opened and closed, and the upper suspension door body suspended from the guide rails 21 and 22 It has become. The second guide rail 22 is for guiding the second door body 2 in the opening / closing direction.

  And since the 1st guide rail 21 is attached to the seamless 5 which is an immovable member with respect to the door bodies 1 and 2 which move open and close, it always does not move, but the 2nd guide rail 22 is the 1st door. Since it is attached to the body 1, it moves together with the first door body 1. Further, as shown in FIG. 10, the distal end portion of the second guide rail 22 on the closing side reaches a position protruding from the closing side end portion of the first door body 1 toward the closing side.

  The first door body 1 and the second door body 2 described above are connected by the interlocking mechanism 40 shown in FIGS. 4 and 7, whereby the door bodies 1 and 2 are opened and closed in the same direction at different speeds. It is like that. 4 shows the interlocking mechanism 40 when the opening 3 in FIG. 1 is closed by two door bodies 1 and 2, and FIG. The interlocking mechanism 40 when the part 3 is opened is shown.

  The interlocking mechanism 40 includes two rotating bodies 41 and 42 provided on the upper surface of the door body 1 </ b> A of the first door body 1, and these rotating bodies 41 arranged in the opening / closing movement direction of the first door body 1. , 42. The string-like member 43 is connected to the invisible member 5 which is a non-moving member at the location A, and the rotating bodies 41, 42 are interposed therebetween. Even at a location B on the opposite side to the location A, the second door body 2 is coupled.

  The connection structure of the string-like member 43 to the mesh 5 at the coupling location A is attached to the mesh 5 via a bracket 44 and is made of rubber having a length in the opening / closing movement direction of the door bodies 1 and 2. Elastic members 45, holes 45A formed through the elastic members 45 in the opening / closing movement direction of the door bodies 1 and 2, and both sides of the elastic members 45 sandwiched between the string members 43 inserted through the holes 45A. It is comprised with the two contact members 46 fixed by. Therefore, the movement of the string-like member 43 in the opening / closing movement direction of the door bodies 1 and 2 is prevented by the contact member 46 coming into contact with the elastic member 45. The inside of the hole 45A is not moved and moved in the opening / closing movement direction of the door bodies 1 and 2.

  When the string-like member 43 is instantaneously subjected to a large tension in the opening / closing movement direction of the doors 1 and 2 and the string-like member 43 tries to move in this direction, the elastic member 45 is elastically moved by the contact member 46. By compressing and deforming, this instantaneous tension is relieved. Therefore, the coupling structure at this coupling point A constitutes a tension relaxation means 47 that can relax the tension acting on the string-like member 43 by the elastic deformation of the elastic member 45.

  Note that support members 48 and 49 that support the vertical rotation center axes 41A and 42A of the rotary bodies 41 and 42 are disposed below the rotary bodies 41 and 42, respectively. Bending pieces 48A and 49A are provided at portions corresponding to the outer peripheral portions of the rotating bodies 41 and 42 in FIG. These bent pieces 48A and 49A prevent the string-like member 43 hung around the outer peripheral grooves of the rotating bodies 41 and 42 from falling off.

  The coupling structure of the string-like member 43 to the second door body 2 at the coupling location B is a rotation that is disposed on the upper surface of the door body 2A of the second door 2 so as to be rotatable about the rotation center axis 50A. The member 50, two holes 50B formed in portions opposite to the rotation center axis 50A of the rotation member 50, and a string-like member 43 inserted into these holes 50B The stop member 51 fixed to both end portions of the second door body 2 and the rotating member 50 are screwed in until the tip comes into contact with the stepped portion 2B of the door body 2A of the second door body 2. The bolt 53 is connected to the rotating member 50. Since both end portions of the string-like member 43 are prevented from coming off by the respective stop members 51 at portions opposite to each other with respect to the rotation center axis 50 </ b> A of the rotation member 50, both ends of the string-like member 43. The part is connected to the rotating member 50.

  For this reason, the string-like member 43 is coupled to the second door body 2 via the rotation member 50, and when the lock nut 52 is loosened and the bolt 53 is rotated forward, the rotation member 50 is rotated about the rotation center axis. 4A and 4B, the tension is applied to the string-like member 43. Therefore, the bolt 53 is a turning operation member for turning the turning member 50, and the connecting structure at the connecting portion B is a tension applying force for applying a tension to the string-like member 43. The means 54 is constituted.

  If the bolt 53 is screwed into the rotating member 50 and does not loosen, the lock nut 52 may be omitted.

  Since the first door body 1 and the second door body 2 are connected by the interlocking mechanism 40 configured as described above, as shown in FIG. When the second door body 2 is moved to the open side by the manual operation by the grip portion 55 of the second door body 2 when the door 3 is closed, the moving force is the string-like member shown in FIG. Since it acts on the rotary body 41 from 43, the 1st door body 1 will also move to the same direction. Then, the movement of the first door body 1 is performed while the rotating bodies 41 and 42 arranged on the first door body 1 rotate and feed the string-like member 43, so that the first door body 1 is the second door body 1. It moves at half the speed of the door 2.

  After the first and second door bodies 1 and 2 reach the retracted position as shown in FIG. 7, when the second door body 2 is moved to the closing side by the grip portion 55, this moving force is string-like. By acting on the rotating body 42 from the member 43, the first door body 1 also moves to the closing side, and the first door body 1 moves at a half speed of the second door body 2.

  Thus, according to the interlocking mechanism 40 of the present embodiment, the first door body 1 is a low-speed door body that opens and closes at a low speed, and the second door body 2 is a high-speed door body that opens and closes at a high speed. The moving speed of the second door body 2 is twice the moving speed of the first door body 1, and the moving directions of the door bodies 1 and 2 are the same.

  Further, according to the interlocking mechanism 40, when the second door body 2 is opened and closed, the first door body 1 also starts opening and closing from the beginning of the opening and closing movement, and the first door body 1 and the second door The body 2 can be smoothly interlocked and moved from the beginning to the end.

  As shown in FIG. 1, lower guide means 61 is provided at the lower part of the first door body 1, and lower guide means 62 is also provided at the lower part of the second door body 2. The movement of the first door body 1 guided by the first guide rail 21 described above is also guided by the lower guide means 61, and the movement of the second door body 2 guided by the first and second guide rails 21 and 22 is performed. The lower guide means 62 is also guided.

  FIG. 11 shows these lower guide means 61 and 62, and FIG. 12 is a plan view showing the lower guide means 61 for the first door body 1 among these lower guide means 61 and 62. It is. As shown in FIG. 11, the lower guide means 61 has a plate-like base member 63 fixed to the floor 7 and a plate-like rotating member 64 placed on the base member 63. . As shown in FIG. 12, the lower guide means 61 is rotatably attached to center shafts 65 and 66 that are separated from each other in the opening / closing movement direction of the door bodies 1 and 2, and upper portions of these center shafts 65 and 66. Guide rollers 67 and 68 serving as guide members for guiding the lower portions of the door bodies 1 and 2 in the opening / closing movement direction are provided, and the lower end of one central shaft 65 penetrates the rotation member 64 and is a base The lower end of the other central shaft 66 is coupled to the rotating member 64.

  Therefore, the rotation member 64, the central shaft 66, and the guide roller 68 provided on the central shaft 66 can rotate with respect to the base member 63 about the central shaft 65 for the guide roller 67. It has become.

  Rotating means 69 for performing this rotation is provided on the base member 63 of the lower guide means 61. The rotating means 69 has a protrusion 70 fixed at a position of the base member 63 corresponding to the notch 64A formed in the rotating member 64, and is screwed into the protrusion 70, and is normally protruded by a lock nut 71A. And a bolt 71 coupled to 70, and the tip of the bolt 71 faces a contact part 64 </ b> B formed on the rotating member 64. When the lock nut 71A is loosened and the bolt 71 is rotated and advanced, and the bolt 71 is rotated and advanced even after the tip of the bolt 71 contacts the abutting portion 64B, the rotating member 64, the central shaft 66, and the guide roller 68 are As shown by 12 two-dot chain lines 64 ′, 66 ′, and 68 ′, the base member 63 rotates with respect to the central axis 65. For this reason, the rotation means 69 which concerns on this embodiment is a push-type means using the volt | bolt 71 grade | etc.,.

  As shown in FIG. 11, the two guide rollers 67 and 68 are arranged on the lower surface of the first door body 1 in the opening / closing movement direction of the door body 1 that is orthogonal or substantially orthogonal to the thickness direction of the door body 1. It is inserted into the long groove 1C, thereby guiding the movement of the first door body 1. If the diameter of the guide rollers 67 and 68 is relatively smaller than the width of the groove 1C, the first door 1 is moved. The lower guide action of the first door body 1 by the lower guide means 61 during the movement of the one door body 1 is rattling in the thickness direction of the door body 1 orthogonal or substantially orthogonal to the opening / closing movement direction of the door body 1. It will be done in.

  In such a case, the rotating member 69 causes the rotating member 64, the central shaft 66, and the guide roller 68 to move to the central shaft 65 as shown by two-dot chain lines 64 ', 66', 68 'in FIG. Is rotated with respect to the base member 63. Thereby, the arrangement position of the guide roller 68 is changed to a direction having a component in the thickness direction of the first door body 1 with respect to the guide roller 67 whose arrangement position is stationary in the thickness direction of the first door body 1. Thus, since the two guide rollers 67 and 68 can be applied to the opposite side surfaces inside the groove 1C, the lower portion of the first door body 1 is in the thickness direction of the first door body 1. The first door 1 can be guided by the lower guide means 61 while preventing it from swinging.

  The structure of the lower guide means 62 for the second door body 2 shown in FIG. 11 is basically the same as the lower guide means 61 for the first door body 1 described above. The difference is that the base member 72 of the lower guide means 62 is L-shaped, and this base member 72 is coupled to the lower outer surface of the first door body 1. For this reason, the lower guide means 62 for the second door body 2 moves integrally with the first door body 1. A rotating member 73 is placed on the horizontal portion of the base member 72, and one of the two central shafts 74, 75 provided in the opening / closing movement direction of the second door body 2 is rotated at the lower portion. The lower central shaft 75 is coupled to the base member 72 through the moving member 73, and the lower portion of the other central shaft 75 is coupled to the rotating member 73. Guide rollers 76 and 77 inserted into the formed groove 2C are rotatably attached.

  The rotating member 73, the central shaft 75, and the guide roller 77 can be rotated with respect to the base member 72 about the central shaft 74 by the rotating means 78 having the same structure as the rotating means 69. This rotating means 78 is provided on the base member 72.

  In the bracket 13 shown in FIG. 13, the roller 31, 32, 34 that is rotatably attached to the bracket 13 is detached from the first and second guide rails 1, 2. Preventing means 80 is attached. This roller detachment prevention means 80 is formed by punching and bending a plate material, and rises from a base portion 13A coupled to the upper surfaces of the door body main bodies 1A and 2A of the door bodies 1 and 2 in the bracket 13. The doors 1 and 2 of the upright portion 13B are attached to either one of the bent portions 13C and 13D on both sides in the opening and closing movement direction by fastening tools such as screws.

  More specifically, the roller detachment preventing means 80 is a main portion attached to either one of the bent portions 13C and 13D (the bent portion 13C in the case of the embodiment of FIG. 13) with a fastening device such as a screw. 81 and a plane L-shape comprising a main portion 81 and a sub-portion 82 that is bent at a right angle in a direction parallel to the moving direction of the doors 1 and 2 and faces the upright portion 13B of the bracket 13. The main portion 81 is formed with a notch 83 cut from the sub-portion 82 in the middle of the main portion 81 in the height direction, and a lower portion of the notch 83 extends to the sub-portion 82 side. It has become. In addition, the sub-portion 82 is also formed with a cut-out portion 85 whose upper side is located at the same height as the upper side of the cut-out portion 83 from the main portion 81 side. Since it does not reach the tip of 82 (the end of the sub-portion 82 opposite to the main portion 81), a drop-off prevention portion 86 that protrudes downward is provided at the lower end of the sub-portion 82. The amount of downward protrusion of the drop-off prevention portion 86 does not reach the uplift prevention portion 84 of the main portion 81.

  FIG. 14 shows a state in which the roller detachment preventing means 80 is attached to the bracket 13 to which the roller 31 of the first door 1 is attached. Like the other rollers 32 to 34 engaged with the first and second guide rails 21 and 22, the roller 31 includes flange portions 31A and 31B on both sides in the thickness direction of the roller 31, and these flange portions 31A. , 31B at the center in the width direction of the roller 31 and a groove 31C formed over the entire circumference of the roller 31, and a protrusion formed on the entire length of the first guide rail 21 in the groove 31C. The raised portion 21 </ b> C is engaged, and the lower side portion 21 </ b> B and the raised portion 21 </ b> C of the first guide rail 21 are inserted into the notch 83 of the main portion 81 of the roller detachment preventing means 80.

  For this reason, as shown in FIG. 14, since the roller 31 is movably engaged with the first guide rail 21, a large lifting force acts on the first door body 1 for some reason. When the body 1 and the roller 31 are lifted upward, the lift preventing portion 84 of the roller detachment preventing means 80 comes into contact with the lower side portion 21B and the lower surface of the upright portion 21C of the first guide rail 21, and the first door body 1 is more than that. Further, since the roller 31 is prevented from floating upward, the groove 31C of the roller 31 placed on the first guide rail 21 is prevented from coming off from the first guide rail 21.

  Further, from the state shown in FIG. 14, when for some reason a large impact force from the left side to the right side in FIG. 14 acts on the first door body 1, the first door body 1 and the roller 31 try to move greatly to the right side. The drop-off prevention portion 86 of the roller removal prevention means 80 has a protruding amount that protrudes downward from the flange portions 31A and 31B of the roller 31. Therefore, the upright portion 21C of the first guide rail 21 is dropped off. , And the rising portion 21C of the first guide rail 21 is prevented from dropping over the flange portion 31A. In other words, the flange portion 31A is prevented from dropping from the rising portion 21C.

  Further, from the state shown in FIG. 14, when for some reason a large impact force from the right side to the left side in FIG. 14 acts on the first door body 1, the first door body 1 and the roller 31 try to move greatly to the left side. Since the upright portion 21C of the first guide rail 21 abuts the front end portion 87 in the thickness direction of the first door body 1 at the notch 83 of the main portion 81 of the roller detachment preventing means 80, the flange portion 31B of the roller 31 is provided. The rising portion 21C of the first guide rail 21 is prevented from falling off, in other words, the flange portion 31B is prevented from dropping from the rising portion 21C.

  Therefore, in this case, the distal end portion 87 of the missing portion 83 of the main portion 81 of the roller detachment preventing means 80 is a portion that exhibits the same function as the drop-off prevention portion 86, that is, a drop-off prevention portion.

  As can be seen from the above description, the roller detachment preventing means 80 according to the present embodiment has a planar L-shape having a main portion 81 and a sub-portion 82 by bending a plate material. In the plate material, a cut portion 80A composed of the two cutout portions 83 and 85 shown in FIG. 13 is formed to extend in the thickness direction of the roller 31 from the auxiliary portion 82 side. As shown in FIG. 14, the guide rail 21 is inserted into the cut portion 80A, and the portion of the cut portion 80A disposed below the guide rail 21 is the lifting prevention portion 84. ing. Further, a portion protruding downward on the near side in the extending direction of the cutout portion 80A is one dropout prevention portion 86 of the two dropout prevention portions 86 and 87, and the extension of the cutout portion 80A. The leading end portion in the exit direction is the remaining drop-off prevention portion 87, and these drop-off prevention portions 86 and 87 are disposed on both sides in the thickness direction of the roller 31.

  The above is the description of the roller detachment preventing means 80 attached to the bracket 13 for the roller 31. However, the rollers 32 of the first door body 1 and the second door body 2 shown in FIGS. This also applies to the roller detachment preventing means 80 attached to the bracket 13 for.

  The roller 33 is attached to the second door body 2 with the bracket 14 as described with reference to FIGS. 3 and 6, and this bracket 14 is also provided with a roller detachment preventing means 80. The roller 33 is also prevented from coming off from the first guide rail 21 by the roller coming-out preventing means 80.

  That is, the roller detachment preventing means 80 is provided for each of the rollers 31 to 34 that are disposed in each of the first door body 1 and the second door body 2. These roller detachment preventing means 80 are provided with rollers 31 to 34 that are coupled to the door body main bodies 1A and 2A, not the door body main bodies 1A and 2A of the first door body 1 and the second door body 2. The brackets 13 and 14 are attached.

  As shown in FIG. 2, the door-side brackets 13 of the first and second door bodies 1 and 2 are provided with contact members 91 and 92, and these contact members 91 and 92 are shown in FIG. 3, the first and second door bodies 1, 2 are in the open limit position (retract limit position) by abutting against the stop members 93, 94 arranged near the rear end of the first guide rail 21 indicated by 3. To reach. Further, locking members 95 and 96 by leaf springs are arranged near the rear end portion of the first guide rail 21, and when the first and second door bodies 1 and 2 reach the opening limit position, The locking members 95 and 96 include rollers to be locked 97 and 98 provided by the abutting members 91 and 92 of the first and second door bodies 1 and 2 shown in FIG. The first and second door bodies 1 and 2 are stopped at that position.

  As shown in FIG. 2, the double sliding door device according to this embodiment is provided with automatic moving means 100 for always urging the first door body 1 toward the closing side and automatically moving it. ing. As shown in FIG. 3, the automatic moving means 100 includes an apparatus main body 102 attached to the first guide rail 21 near the front end portion of the first guide rail 21 via a bracket 101, and FIG. As shown, a reel 103 rotatably incorporated in the apparatus main body 102 and one end coupled to the reel 103 are wound, and the other end extending from the apparatus main body 102 is the second door body 2. And a string-like member 104 coupled to the bracket 14 on the door end side. A spiral spring having one end coupled to the reel 103 and the other end coupled to the apparatus main body 102 is disposed inside the reel 103.

  Therefore, when the second door body 2 is moved from the position of FIG. 2 to the opening side by grasping the grip portion 55 shown in FIG. 1, the spiral spring is moved by the reel 103 that feeds the string-like member 104 while rotating. Accumulated. This accumulated pressure becomes a driving force for automatically moving the second door body 2 to the closed side, and when the hand is released from the grip portion 55, the locked member 98 is locked to the locking member 96. When the operation force to the closing side is applied to the second door body 2 that has been stopped at the movement limit position on the opening side, and the locking of the locked member 98 to the locking member 96 is thereby released, the above driving force Thus, the second door body 2 automatically closes and moves, and the first door body 1 connected to the second door body 2 by the interlock mechanism 40 also automatically closes and moves.

  Further, in the double sliding type sliding door device according to this embodiment, when the first door body 1 reaches a predetermined distance from the backward limit position (open limit position) to the closing side, the first door body 1 thereafter A braking device 110 shown in FIG. 2 is provided for decelerating the closing movement speed. The braking device 110 includes a cylinder 112 attached to the first guide rail 21 with a bracket 111, a piston rod 113 that can be expanded and contracted with respect to the cylinder 112, and a bracket 13 on the door bottom side of the first door body 1. The piston rod 113 is attached to the abutting member 91 and protrudes from the cylinder 112 to the opening side of the first door body 1 when the first door body 1 moves from the rear end limit position to the closing side up to a predetermined distance. And a catch member 114 that causes the piston rod 113 to contract and move relative to the cylinder 112 by the closing movement of the first door body 1 thereafter. Since the cylinder 112 is provided with an orifice that exhausts the air inside the cylinder 112 that is compressed by the contraction movement of the piston rod 113, the first door body 1 is moved from the retreat limit position to the closing side up to a predetermined distance. When the first door body 1 is further closed and moved, the closing movement of the first door body 1 and the closing movement of the second door body 2 connected to the first door body 1 by the interlock mechanism 40 are decelerated by the restriction action of the orifice. It will be.

  Further, when the second door body 2 is opened and moved by the gripping portion 55 of FIG. 1 and the first door body 1 is also opened and moved by the interlocking mechanism 40, the piston rod 113 connected to the catch member 114 by a magnetic force or the like is Since the cylinder 112 is provided with a one-way valve that opens an intake port for allowing a large amount of air to enter the cylinder 112 at this time, the first door body 1 and the second door 1 The door body 2 opens and moves at a speed corresponding to the magnitude of the opening operation force applied to the gripping portion 55 in FIG. 1, and when the opening movement distance of the door body 1 reaches a predetermined distance, the catch member 114 extends. It leaves | separates from the piston rod 113 which reached the movement limit position.

  FIG. 15 shows a roller detachment preventing means 80 'according to another embodiment. This roller detachment preventing means 80 'also has a floating prevention portion 84' and dropout prevention portions 86 ', 87', but the bent portion of the bracket 13 'of this embodiment to which the roller detachment prevention means 80' is attached. The dimension in the thickness direction of the door bodies 1 and 2 with respect to 13C ′ is smaller than the dimension in the thickness direction of the door bodies 1 and 2 with respect to the bent portion 13C of the bracket 13 of the above-described embodiment. The depth in the thickness direction of the door bodies 1 and 2 at the notch 83 ′ of the detachment preventing means 80 ′ is smaller than the depth of the notch 83 of the roller detachment preventing means 80 of the above embodiment. For this reason, the drop-off prevention portions 86 ′ and 87 ′ in the roller detachment preventing means 80 ′ of this embodiment coincide with the inner surfaces of the flange portions 31 </ b> A and 31 </ b> B on both sides of the roller 31 in the thickness direction of the roller 31. Or, it is formed at a substantially coincident position.

  According to this, the prevention of the flange portions 31A, 31B from falling off the upright portion 21C of the guide rail 21 by the dropout prevention portions 86 ′, 87 ′ is an early stage immediately before the flange portions 31A, 31B reach the upright portion 21C. It will be possible at the time of.

  In the embodiment described above, of the two rollers 33, 34 provided on the second door body 2 in the opening / closing movement direction of the second door body 2, the opening-side roller 34 is the first door body 1. Therefore, a part of the weight of the second door body 2 acts on the first door body 1 via the second guide rail 22.

  For this reason, of the first door body 1 and the second door body 2 that have reached the open limit position, the second door body 2 is closed and moved by the gripping portion 55 shown in FIG. The interlocking mechanism 40 makes the first door body 1 a low-speed door body, the second door body 2 becomes a high-speed door body, and the second door body 2 moves forward from the position of the first door body 1. The weight of the second door body 2 acting on the first door body 1 via the second guide rail 22 when the opening 3 is fully closed or substantially fully closed by 1 and 2. Part of the opening side (door bottom side) of the first door body 1 is provided on the closing side of the rollers 31 and 32 provided in the opening / closing movement direction of the first door body 1. It can be considered that the roller 31 floats up, that is, lifts.

  When such a situation occurs, the roller attached to the open side bracket 13 of the two brackets 13 provided in the first door body 1 in the opening and closing movement direction of the first door body 1 is removed. As described with reference to FIGS. 14 and 15, the floating prevention portions 84 and 84 ′ of the prevention means 80 and 80 ′ abut against the lower surfaces of the lower side portion 21 </ b> B and the upright portion 21 </ b> C of the first guide rail 21. Although the roller 32 on the opening side in the one door body 1 is prevented from being detached from the upright portion 21C of the first guide rail 21, in the present embodiment, in addition to the lifting prevention portions 84 and 84 ', the first door The end portion of the body 1 on the open side (door bottom side) is lifted around the roller 31, so that the roller 32 is disengaged from the engaging portion 21 </ b> C of the first guide rail 21 before the first guide rail 21. A roller detachment preventing portion 120 for preventing the roller 32 from detaching from the upright portion 21C of the first guide rail 21 by contacting the lower side portion 21B and the lower surface of the upright portion 21C is shown in FIGS. As shown in the figure, the first door body 1 is disposed below the first guide rail 21. This roller detachment preventing portion 120 is also shown in FIGS.

  FIG. 16 is an enlarged front view showing a portion of the open side bracket 13 where the roller detachment preventing portion 120 is arranged, out of the two brackets 13 provided on the first door body 1. 16, the second guide rail 22 shown in FIG. 10 attached to the first door 1 is omitted. FIG. 17 is a side view showing the roller detachment preventing unit 120 as viewed from the closed side to the open side in FIG.

  As shown in FIGS. 16 and 17, the roller detachment preventing portion 120 is disposed on the bracket 13 on the opening side of the first door 1 via the holding member 121, and the holding member 121 is attached to the bracket 13. The fastening parts 122 such as screws are attached to the folding parts 13C on the closed side of the folding parts 13C and 13D on both sides in the opening and closing movement direction. A holding member 121 made of a plate material is formed at a right angle to a main portion 121A attached to the bent portion 13C of the bracket 13 by a fastening tool 122, and a lower portion of the main portion 121A. And the sub-portion 121B facing each other. A screw 123 protruding toward the roller 32 is inserted into the sub-portion 121B, and a cylindrical rotating member 125 is rotatably fitted to the outer periphery of the screw 123 via a spacer 124. The screw 123 is fixed in the axial direction of the screw 123 by a double nut 126 screwed to the tip.

  The roller detachment preventing unit 120 of the embodiment according to FIGS. 16 and 17 is the rotating member 125. The rotating member 125 is vertically opposed to the lower side portion 21B of the first guide rail 21 and the lower surface of the raised portion 21C below the first guide rail 21 with a slight gap therebetween. The size of the gap is determined by the lift prevention portions 84 and 84 ′ of the roller detachment prevention means 80 and 80 ′ attached to each of the two brackets 13 provided in the first door 1, and the first guide rail 21. It is smaller than the size of the gap between the lower side portion 21B and the lower surface of the upright portion 21C.

  Therefore, when the opening 3 is fully closed by the first and second door bodies 1 and 2, or when the opening 3 is substantially fully closed, the first door body 1 acts on the first door body 1 via the second guide rail 22. Due to a part of the weight of the second door body 2, the opening side end of the first door body 1 is lifted around the roller 31, 32 of the first door body 1 on the closed side. Even before the roller 32 is disengaged from the engaging portion 21C of the first guide rail 21, the rotating member 125 comes into contact with the lower side portion 21B of the first guide rail 21 and the lower surface of the rising portion 21C. 32 is prevented from detaching from the upright portion 21 </ b> C of the first guide rail 21.

  And even if the 1st door body 1 continues the movement to the closing side as it is, or even if the 1st door body 1 reversely moves to the opening side, this movement of the 1st door body 1 will be 1st guide The rotating member 125 in contact with the lower side 21B of the rail 21 and the lower surface of the upright portion 21C is rotated. For this reason, even if the roller separation preventing portion 120 abuts the lower side portion 21B of the first guide rail 21 and the lower surface of the upright portion 21C, this abutment reduces the frictional force with which the frictional force with the first guide rail 21 is reduced. The rotating member 125 that constitutes the portion does not hinder the smooth opening and closing movement of the first door body 1, and the smooth movement of the first door body 1 can be ensured.

  In the present embodiment, both the rollers 33 and 34 provided on the second door body 2 are not mounted on the second guide rail 22 attached to the first door body 1, Since only one of the rollers 34 of the rollers 33, and only the roller 34 on the closing side, is placed on the second guide rail 22, it is compared with the case where both rollers 33 and 34 are placed on the second guide rail 22. Thus, the opening side end portion of the first door body 1 can reduce the lifting force and the lifting amount about the closing side roller 31 of the rollers 31 and 32 of the first door body 1. For this reason, the smooth opening and closing movement of the first door body 1 can be ensured also by this.

  FIG. 18 shows a roller detachment preventing unit 120 according to another embodiment. The roller detachment prevention unit 120 of this embodiment is provided in the lift prevention unit 84 of the roller detachment prevention means 80 attached to the open side bracket 13 out of the two brackets 13 provided in the first door body 1. It has been.

  In other words, the roller detachment prevention unit 120 in this embodiment is configured by covering and fixing the friction reduction member 135 to the lift prevention unit 84 of the roller detachment prevention unit 80, and the friction reduction member 135 is combined with the roller detachment prevention unit 120. It has become. The friction reducing member 135 is formed of a hard plastic such as polytetrafluoroethylene, for example, having a smaller frictional force with the second guide rail 21 than the metal that is the material of the roller detachment preventing means 80 made of a plate material.

  For this reason, also in this embodiment, due to a part of the weight of the second door body 2 acting on the first door body 1 via the second guide rail 22, the opening side end portion of the first door body 1 is Even when the roller 31 is lifted around the center, the friction reducing member 135 is moved to the lower side portion 21B of the first guide rail 21 and the lower surface of the upright portion 21C before the roller 32 is disengaged from the engaging portion 21C of the first guide rail 21. , The roller 32 is prevented from detaching from the upright portion 21C of the first guide rail 21, and even if the first door body 1 continues to move toward the closing side, Even if the door body 1 is reversed and moved to the opening side, the movement of the first door body 1 causes a large friction between the friction reducing member 135 and the lower side portion 21B of the first guide rail 21 and the lower surface of the upright portion 21C. The first door is made without generating force. It is possible to ensure the smooth movement of.

  Note that the friction reducing member 135 is attached to and removed from the lifting preventing portion 84 instead of the friction reducing member 135 which is fixedly covered with the lifting preventing portion 84 of the roller detachment preventing means 80. 135 'may be used. According to this, when the friction reducing member 135 ′ used so far is worn or damaged, the friction reducing member 135 ′ can be replaced with a new friction reducing member 135 ′ by removing the friction reducing member 135 ′ from the lifting prevention portion 84. Can do.

  Such a fixed friction reducing member 135 and a replaceable friction reducing member 135 'can also be applied to the lifting prevention portion 84' of the roller detachment preventing means 80 'shown in FIG.

  INDUSTRIAL APPLICABILITY The present invention can be used for a sliding door device in which a door body is an upper suspension door body that is slidably engaged on a guide rail.

BRIEF DESCRIPTION OF THE DRAWINGS It is a front view which shows the whole double sliding type sliding door apparatus used as the upper suspension type sliding door apparatus which concerns on one Embodiment of this invention, Comprising: The 1st and 2nd 2 door body is an entrance / exit. It is a figure which shows the time of closing the opening part. FIG. 2 is a front view showing a moving mechanism that opens and closes two door bodies with the eyeless cover shown in FIG. 1 removed, and is a view when the two door bodies are in the position of FIG. 1. . It is a top view which shows the moving mechanism of FIG. 2, Comprising: It is a figure when two door bodies exist in the position of FIG. It is a top view which shows the interlocking mechanism for interlocking and opening and moving two door bodies, Comprising: It is a figure when two door bodies exist in the position of FIG. FIG. 2 is a front view showing a moving mechanism for opening and closing two door bodies, with the eyeless cover shown in FIG. 1 removed, and the two door bodies reaching the retracted position and shown in FIG. It is a figure which shows the time of opening the opening part. It is a top view which shows the moving mechanism at the time of FIG. It is a top view which shows the interlocking mechanism at the time of FIG. FIG. 6 is a cross-sectional view taken along line S8-S8 of FIG. It is the S9-S9 sectional view taken on the line of FIG. It is a front view which shows the 1st door body and the 2nd guide rail attached to two brackets of this 1st door body. It is a longitudinal cross-sectional view of the door body which shows the lower guide means for the 1st and 2nd door body shown by FIG. It is a top view which shows the lower guide means for the 1st door body shown by FIG. It is a disassembled perspective view which shows the bracket for attaching the roller engaged with a 1st and 2nd guide rail to a 1st and 2nd door body, and the roller removal prevention means provided in this bracket. It is a top front view of the 1st door body which shows the state which made the 1st door body which attached the roller detachment prevention means of FIG. 13 movable along the 1st guide rail. FIG. 15 is a view similar to FIG. 14 illustrating a roller detachment preventing unit according to another embodiment. It is a front view which expands and shows the part of the bracket of the open side in which the roller detachment | leave prevention part by a rotation member is arrange | positioned among the brackets provided in the 1st door body, and is attached to a 1st door body. It is the figure which abbreviate | omitted the 2nd guide rail shown by FIG. FIG. 17 is a side view showing the roller detachment preventing portion as viewed from the closed side to the open side in FIG. 16. FIG. 18 is a view similar to FIG. 17 showing an embodiment in which a roller detachment preventing portion by a friction reducing member is provided in the lifting prevention portion of the roller detachment preventing means of FIG. 15.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 1st door body 2 2nd door body 13,14 Bracket 21 1st guide rail 22 2nd guide rail 31-34 Roller 80,80 'Roller prevention means 84,84' Lifting prevention part 120 Roller separation prevention part 125 Rotation Member 135, 135 'Friction reducing member

Claims (7)

It has at least one upper suspension type door body provided with a roller on the guide rail so as to be able to roll freely, and this door body can be opened and closed by rolling on the guide rail of the roller. And a roller for preventing the roller from coming off the guide rail by abutting the guide rail before the roller comes off from the engagement with the guide rail due to the lift of the door body. In the roller detachment prevention device of the upper suspension type sliding door device in which the detachment prevention portion is disposed at the position of the door body below the guide rail,
The door body includes at least two first and second door bodies that are arranged in the door body thickness direction and have the same opening and closing movement direction, and the rollers of the first door body are The roller of the second door body is movably engaged with the first guide rail attached to the immovable member, and the roller of the second door body is rollable to the second guide rail attached to the first door body. When the second door body moves forward from the position of the first door body, the opening is closed by these door bodies, and a plurality of openings are provided in the opening / closing movement direction of the first door body. Among the rollers of the first door body, the roller detachment preventing portion is disposed at the position of the first door body on the opening side with respect to the roller disposed on the most closed side. Roller separation prevention device for sliding door device. 2. The roller detachment preventing device for an overhanging sliding door device according to claim 1, wherein the roller detachment preventing portion is configured as a friction reducing portion having a small frictional force with the first guide rail. Roller detachment preventing device for sliding door device. The roller detachment prevention device for the upper suspension type sliding door device according to claim 1 or 2 , wherein at least one of the rollers of the second door body provided in a plurality in the opening / closing movement direction of the second door body. The roller is separated from the upper suspension type sliding door device, wherein the roller is movably engaged on the first guide rail, and the remaining rollers are movably engaged on the second guide rail. Prevention device. The roller detachment preventing device of the upper suspension type sliding door device according to any one of claims 1 to 3 , wherein the roller detachment preventing portion is configured by rotatably arranging a rotating member on the door body. A roller detachment preventing device for the upper suspension type sliding door device. 4. The roller detachment preventing device for an overhanging sliding door device according to claim 1 , wherein the roller detachment preventing portion includes a friction reducing member formed of a material having a small frictional force with the guide rail. A roller detachment preventing device for an upward sliding type sliding door device, characterized in that it is configured to be fixed to a door body at least when the door body is opened and closed. 6. The apparatus of claim 5 , wherein the friction reducing member is attached to and detached from the door body so as to be removable. Prevention device. 7. The roller detachment preventing device for an overhanging sliding door device according to claim 1 , wherein the door body includes a bracket to which the roller is attached, and the roller detachment preventing portion is provided on the bracket. A roller detachment preventing device for an overhanging sliding door device, wherein:

Images