JP7429424B2 - sliding door device - Google Patents

Description

The present invention relates to a sliding door device used in a cabinet or the like, and particularly relates to a sliding door device in which the opening/closing door is shifted toward the user side with respect to the upper guide rail.

Cabinets installed in buildings, etc. are equipped with a sliding door device at the front opening, and by moving the opening/closing door of this sliding door device in the opening/closing direction (left and right as seen from the user), items can be stored or taken out inside. It is something that can be done. This opening/closing door is provided with a moving roller on its upper edge, and is moved in the opening/closing direction by running on an upper guide rail arranged on the upper side of the opening of the cabinet. Further, this opening/closing door is generally placed directly below the upper guide rail, and is attached to the upper guide rail in such a manner that it is suspended from the upper guide rail via a moving roller.

In such a general sliding door device, the upper guide rail is visible from the user who is trying to open the door, which spoils the aesthetic appearance. Therefore, by shifting the opening/closing door toward the user (front side) from the position of the upper guide rail and extending the upper edge of the opening/closing door upward, the upper guide rail (or cabinet There is also a sliding door device that has a structure in which the ceiling (of the roof) is hidden from view (for example, see Patent Document 1).

Japanese Patent Application Publication No. 2002-339649

When the opening/closing door of a sliding door device is placed offset toward the user, a moment is generated by the own weight of the opening/closing door and the distance from the moving roller to the opening/closing door, and this moment acts to tilt the opening/closing door. Therefore, in the technology of Patent Document 1, the movable rollers are arranged in two rows in the depth direction when viewed from the user side, and the lower and upper sides of the movable rollers are received by the upper guide rail. This prevents the opening/closing door from tilting against the

However, with the technology of Patent Document 1, the opening/closing door may be assembled at an angle due to assembly dimensions and manufacturing errors between the upper guide rail and the moving roller, and it is necessary to correct or finely adjust this inclination. I can't. If this inclination remains, the opening/closing operation may become difficult or abnormal noise may occur during the opening/closing operation.

The present invention has been made in view of the above-mentioned circumstances, and an object of the present invention is to provide a sliding door device that can finely adjust the inclination of an opening/closing door that is shifted toward the user.

In order to solve the above-mentioned problems, a sliding door device of the present invention includes an upper guide rail attached to a cabinet main body, and an opening/closing door arranged at a position offset to the front side of the upper guide rail, has an upper mounting part extending rearward toward the upper guide rail, and a moving roller attached to the upper mounting part and running on the upper guide rail in the opening/closing direction , At the position, it contacts the upper surface of the upper mounting part and becomes a fulcrum when pulling up the upper mounting part, and at a position between the opening/closing door and the movable roller, the upper mounting part is pulled upward and the upper mounting part is pulled up . The present invention is characterized in that a lifting means is provided for correcting the inclination of the opening/closing door by rotating it around a fulcrum .

Further, the lifting means may be provided with a lifting amount adjustment screw at a position that serves as the fulcrum, and the lifting amount adjustment screw may be brought into contact with the upper surface of the upper mounting portion .

Furthermore, the pulling means includes a lifting part located above the upper mounting part, and a moving roller for pulling up that moves as the opening/closing door runs, and the up and down movement of the moving roller for pulling up is regulated. You can do it like this.

Moreover, the moving roller for pulling up may be arranged on the rear side of the upper guide rail, and may be moved in the opening/closing direction on an auxiliary guide rail that is separate from the upper guide rail.

Furthermore, in the front-rear direction, the distance from the pulling moving roller to the moving roller may be equal to or longer than the distance from the opening/closing door to the moving roller.

The sliding door device according to the present invention is provided with a pulling means for lifting the upper mounting part upward at a position between the opening/closing door and the movable roller, so even when the opening/closing door is in a tilted state, the upper mounting This tilt can be corrected or fine-tuned by pulling up. This makes it possible to prevent the opening/closing door from becoming difficult to open and close, and from generating abnormal noises when opening/closing.

FIG. 1 is an enlarged perspective view of the upper part of the cabinet, viewed obliquely from above, of a cabinet equipped with a sliding door device according to an embodiment of the present invention. 2 is a sectional view taken along line XX in FIG. 1. FIG. FIG. 2 is an exploded perspective view of FIG. 1; FIG. 2 is an enlarged perspective view of the right-side opening/closing door as a single unit, with the upper part of the opening/closing door seen diagonally from above. FIG. 5 is an enlarged perspective view of the right side opening/closing door of FIG. 4 viewed diagonally from below. (A) is a perspective view of the pulling means seen from the front diagonally upper side, and (B) is a perspective view seen from the front diagonally lower side. FIG. 3 is an enlarged sectional view of the lower guide rail portion viewed from the right side. FIG. 3 is a side sectional view showing a state where the inclination of the opening/closing door is not adjusted. FIG. 9 is a side sectional view showing a state after the state shown in FIG. 8 has been adjusted by tightening the tilt adjustment screw. 9 is a side sectional view showing a state in which the opening/closing door is still tilted even after tightening the tilt adjustment screw from the state shown in FIG. 8. FIG. FIG. 9 is a side sectional view showing a state in which a long pulling allowance is secured from the state shown in FIG. 8 using a pulling allowance adjustment screw. FIG. 12 is a side sectional view showing a state after the state shown in FIG. 11 has been adjusted by tightening the tilt adjustment screw.

EMBODIMENT OF THE INVENTION Hereinafter, the sliding door apparatus H based on embodiment of this invention is demonstrated in detail using drawing.
FIG. 1 is an enlarged perspective view of a cabinet 1 equipped with a sliding door device H according to an embodiment of the present invention, when the upper part of the cabinet 1 is viewed diagonally from above. 2 is a sectional view taken along the line XX in FIG. 1, and FIG. 3 is an exploded perspective view of the auxiliary guide rail 20 and the lifting means 30 taken apart from the state shown in FIG.

Note that the front and back, left and right, and up and down directions used in this embodiment refer to the directions when the user views the sliding door device H from the front, and refer to the directions shown in FIGS. 1 to 3. Further, the opening/closing direction of the opening/closing door 3 refers to the left-right direction.

As shown in FIGS. 1 to 3, the cabinet 1 has a box shape with an open front, and a sliding door device H is attached to the front opening. As mainly shown in FIG. 2, this sliding door device H is arranged at the rear side of two opening/closing doors 3 (left opening/closing door 3a, right opening/closing door 3b) and the upper part of these opening/closing doors 3a, 3b. It is composed of an upper guide rail 4 that supports the upper part of the door 3, and an auxiliary guide rail 20 and a lifting means 30 that are attached to the rear side of the upper guide rail 4.

The sliding door device H of this cabinet 1 differs from a general sliding door in which the opening/closing door is arranged directly below the upper guide rail, and the opening/closing door 3b is located on the front side (user side) of the upper guide rail 4. is placed at an offset position. More specifically, the center of gravity of the opening/closing door 3b is located in front of the upper guide rail 4, and the load acts diagonally on the moving roller 12 (details will be described later) running on the upper guide rail 4. This is a sliding door device H.

The two opening/closing doors 3a and 3b are attached so as to cover the front opening of the cabinet 1. The left side door 3a is located on the rear side, and the right side door 3b is located on the front side of the left side door 3a, so that it can be opened and closed by sliding left and right.

As shown in FIG. 2, the left door 3a can be installed close to the upper guide rail 4 in the front-rear direction, so the moment acting on the left door 3a is small and can be installed with almost no inclination. can. On the other hand, since the right opening/closing door 3b is attached at a position away from the upper guide rail 4, the inclination may become large. In this embodiment, a lifting means 30 whose inclination can be adjusted is installed only on the right door 3b (details will be described later). In the following explanation, the right opening/closing door 3b will be explained.

FIG. 4 shows the right opening/closing door 3b alone, and is an enlarged perspective view of the upper part of the right opening/closing door 3b viewed diagonally from the front upper side. FIG. 5 shows the right opening/closing door 3b in FIG. 4 diagonally from the rear. It is an enlarged perspective view seen from the bottom.

The right opening/closing door 3b includes a transparent plate member 8 such as glass located on the front side, a frame member 9 to which the peripheral edge of the transparent plate member 8 is fixed, and a frame member 9 that extends from the upper edge of the frame member 9 toward the rear side. and an upper mounting portion 10 extending to the top of the upper guide rail. As shown in FIGS. 4 and 5, this upper mounting portion 10 is provided over the entire length of the right opening/closing door 3b in the left-right direction.

A lower stepped portion 10 a is formed at the rear end of the upper mounting portion 10 . Specifically, by bending the rear end portion of the upper attachment portion 10 downward and further folding it back so that its tip portion is approximately horizontal, a horizontal surface is formed one step below.

As shown in FIG. 5, three roller members 11 are attached to the lower step portion 10a at both left and right ends and at the center. Further, each of the roller members 11 is provided with a movable roller 12 that can rotate in the opening/closing direction of the opening/closing door 3.

As shown in FIG. 2 (and FIGS. 8 to 12), the roller member 11 is configured such that the height of the movable roller 12 can be finely adjusted by turning a movable roller adjustment screw 11a. Further, on the rolling surface of the moving roller 12, an arcuate groove 12a is continuously provided over the entire circumference in the circumferential direction.

Furthermore, as shown in FIG. 4, two screw holes 10b, 10b are provided at both left and right ends of the upper mounting portion 10 and in front of the lower stepped portion 10a. An inclination adjustment screw 35, which will be described in detail later, is screwed into this screw hole 10b.

As shown in FIGS. 1 and 3, the upper guide rail 4 is attached to the top plate 2a of the cabinet body 2, and is continuously provided between the left and right side plates 2b, 2b of the cabinet body 2. ing. Note that the left and right side plates 2b, 2b are extended above the top plate 2a in order to prevent the upper guide rail 4 and the like from being seen from the side surface of the cabinet 1.

As shown in FIG. 2 (and FIGS. 8 to 12), the upper guide rail 4 has a pair of a part on which the roller member 11 is placed and rolls, and a part to which the closer 5 is attached. One pair for the left side door 3a is provided on the front side of the upper guide rail 4, and one pair for the right side door 3b is provided on the rear side.

The above-mentioned closer 5 is a device that forcibly moves the doors 3a and 3b to the closed state, and captures the captured member at a predetermined position on the guide rail and closes the door using the biasing force of a spring. This is a forced move. By providing this closer 5, it is possible to prevent the opening/closing doors 3a, 3b from being left in a half-open state. Note that since this closer 5 is a technology that has been used conventionally, a detailed explanation of its structure will be omitted.

When the closer 5 captures the above-mentioned member to be captured, if the opening/closing doors 3a, 3b are opened and closed in an inclined state, the operation may become unstable. Therefore, in order to operate the closer 5 stably, it is preferable to maintain the opening/closing doors 3a, 3b in an untilted state. Incidentally, in the sliding door device H, if the function of the closer 5 is not required, it is possible to naturally configure the sliding door device H without providing the closer 5.

As shown in FIG. 2 (and see FIGS. 8 to 12), an arcuate protrusion 4a that protrudes upward is formed in the portion of the upper guide rail 4 on which the roller member 11 is placed and rolls. ing. The arcuate groove 12a of the movable roller 12 is attached to the arcuate protrusion 4a so as to be in contact with it on the circumferential surface. As a result, even if a load that tilts the opening/closing door 3 is applied when the movable roller 12 moves in the opening/closing direction, the arcuate protrusion 4a and the arcuate groove 12a remain on the circumferential surface while the movable roller 12 remains in the inclined position. Since the movable rollers 12 are in contact with each other at the top, the movable rollers 12 can rotate smoothly in the opening/closing direction, as in the case where the movable rollers 12 are not tilted. Moreover, the position of the opening/closing door 3 in the front-rear direction is regulated by the arc-shaped protrusion 4a and the arc-shaped groove 12a coming into contact with each other on the circumferential surface.

As shown in FIG. 2 (and FIGS. 8 to 12), the auxiliary guide rail 20 is attached to the top plate 2a in the same way as the upper guide rail 4. Further, the auxiliary guide rail 20 is continuous between the left and right side plates 2b, and is arranged parallel to the rear side of the upper guide rail 4.

Further, the auxiliary guide rail 20 is provided with a lower arcuate protrusion 21 and an upper arcuate protrusion 23, as shown in FIG. 2 (and FIGS. 8 to 12). This upper arcuate protrusion 23 is provided via an upright portion 22 extending from the lower side of the auxiliary guide rail 20 to the upper side. The lower arcuate protrusion 21 and the upper arcuate protrusion 23 are attached to the arcuate grooves 34a of the moving roller for pulling 34 (details will be described later) so that they are in contact with the circumferential surfaces from below and above. .

FIG. 6(A) is a perspective view of the pulling means 30 seen from the front diagonally upper side, and FIG. 6(B) is a perspective view of the pulling means 30 seen from the front diagonally lower side.

The lifting means 30 is bent into an L shape when viewed from the side, and includes a lifting section 31 located on the upper side and a vertical surface section 32 extending downward from the rear end of the lifting section 31.

The lifting portion 31 is a plate-like member having a horizontal surface. The pulling portion 31 is provided with a longitudinal elongated hole 31a extending in the longitudinal direction on the front side of the center portion in the left-right direction, and a screw hole 31b on the rear side of the longitudinal elongated hole 31a. Furthermore, lower bent portions 33 are provided at both left and right end portions of the pulling portion 31, which are bent downward into a U-shape and protrude below the lifting portion 31, respectively.

The vertical surface portion 32 is provided with two rotating shafts 34b, 34b extending toward the rear side of the vertical surface portion 32. These two rotating shafts 34b, 34b are spaced apart from each other in the left-right direction, and lifting moving rollers 34, 34 are attached to these rotating shafts 34b, 34b, respectively. Similar to the above-mentioned moving roller 12, the rolling surfaces of the moving rollers 34, 34 for pulling up are provided with arc-shaped grooves 34a continuously over the entire circumferential direction. The grooves 34a, 34a are arranged on a straight line so that they can move in parallel to the opening/closing direction.

The lifting rollers 34, 34 of the pulling means 30 are inserted from either the left or right end of the auxiliary guide rail 20, and the arcuate groove 34a is connected to the lower arcuate protrusion 21 and the upper arcuate protrusion 23. They are temporarily assembled in advance in a state in which they are in contact with each other on their circumferential surfaces (in a state in which the top and bottom are regulated). In this state, the load acting on the moving rollers 34, 34 for pulling up is received by the lower arcuate protrusion 21 or the upper arcuate protrusion 23.

Then, as shown in FIG. 3, after the moving roller 12 of the opening/closing door 3b is placed on the upper guide rail 4, the auxiliary guide rail 20 on which the lifting means 30 is temporarily assembled is attached to the rear side of the upper guide rail 4. When the temporarily assembled auxiliary guide rail 20 is attached, as shown in FIG. 2 (and see FIG. 8), the lower bent portion 33 of the lifting means 30 and the lifting amount adjustment screw 36 are connected to the lower step of the opening/closing door 3b. It comes to be located above the section 10a.

Further, the inclination adjustment screw 35 is screwed into the screw hole 10b of the upper mounting portion 10. Thereby, the pulling means 30 moves in the opening/closing direction along the auxiliary guide rail 20, following the movement of the opening/closing door 3b in the opening/closing direction.

On the other hand, as shown in FIG. 7, the structure of the lower side of the opening/closing door 3b is such that the lower guide rail 6 is extended downward so that it cannot be seen from the user side, and the lower end thereof is extended to the rear side and attached to the lower side. A portion 13 is provided, and the roller member 11 is attached to this lower attachment portion 13. Further, the lower guide rail 6 is attached to the bottom plate 2c of the cabinet body 2, and similarly to the upper guide rail 4, the arcuate groove 12a of the moving roller 12 is received from above by the arcuate projection 6a.

Next, the operation of the sliding door device H according to the embodiment of the present invention will be explained in detail using FIGS. 8 to 12.
FIG. 8 shows a state in which the inclination of the opening/closing door 3b is not adjusted, and FIG. 9 is a side sectional view showing a state after the inclination adjustment screw 35 is tightened and adjusted from the state in FIG. 8.
Moreover, FIG. 10 is a side sectional view showing a state in which the opening/closing door 3b is still tilted even if the tilt adjustment screw 35 is tightened from the state shown in FIG. FIG. 11 shows a state in which the pulling allowance has been secured longer using the pulling allowance adjusting screw 36 from the state shown in FIG. FIG.

Note that in FIGS. 8 to 12, the closer 5 and the left opening/closing door 3a are omitted for ease of explanation.

When the sliding door device H is normally assembled, as shown in FIG. 8, the opening/closing door 3b is tilted forward and downward due to the moment. At this time, the lower bent portion 33 of the lifting means 30 is in contact with the upper surface of the lower stepped portion 10a of the opening/closing door 3b.

From this state, when the inclination adjustment screw 35 is tightened, the upper mounting portion 10 of the opening/closing door 3b is pulled upward using the lower bent portion 33 as a fulcrum, as shown in FIG. More specifically, since the position of the inclination adjustment screw 35 in the front-rear direction is between the opening/closing door 3b and the movable roller 12 (lower bending part 33), by tightening the inclination adjustment screw 35, the lower bending part 33 is not lifted up, but the opening/closing door 3b side is pulled up clockwise in the plane of FIG. 8 around the lower bent portion 33. Thereby, the inclination of the opening/closing door 3b can be adjusted. Further, by adjusting the tightening amount of the inclination adjustment screw 35, it is possible to finely adjust the inclination caused by, for example, manufacturing errors of the upper guide rail 4 or the opening/closing door 3b.

This adjustment of the inclination is performed by the lifting means 30 receiving a moment generated by the own weight of the opening/closing door 3b. In detail, the lifting moving roller 34 of the pulling means 30 is regulated vertically within the auxiliary guide rail 20 to support the load, and the distance from the inclination adjustment screw 35 to the lifting moving roller 34 supports the load. This is due to applying a rotational moment in the direction.

By ensuring a long distance from the inclination adjustment screw 35 of the pulling means 30 to the moving roller for pulling 34, the load that the moving roller for pulling 34 receives can be reduced. As a result of confirming the prototype, if the distance from the moving roller for lifting 34 to the moving roller 12 is equal to (approximately 1:1) or greater than (1:1 or more) the distance from the opening/closing door 3b to the moving roller 12. , it is possible to reduce the load that the moving roller 34 for pulling up receives, and it is possible to configure the roller with a size (diameter) that fits within the installation space shown in FIG. 2 .

On the other hand, even if the inclination adjustment screw 35 is tightened from the state shown in FIG. 8, as shown in FIG. 10, the amount of pulling may be insufficient and the inclination may not be corrected. In such a case, after loosening the inclination adjustment screw 35 once and returning it to the state shown in FIG. 8, as shown in FIG. so that the lifting amount adjustment screw 36 comes into contact with the upper surface of the lower stepped portion 10a.

That is, by making the lower end of the lifting amount adjusting screw 36 protrude lower than the lower end of the lower bent portion 33, the lifting portion 31 of the pulling means 30 is lifted upward, and a long lifting amount for the inclination adjusting screw 35 is ensured. will be done. As a result, as shown in FIG. 12, when the inclination adjustment screw 35 is tightened, the upper mounting portion 10 of the opening/closing door 3b is pulled up further upward than in the state shown in FIG. It will be done. As a result, as shown in FIG. 12, the inclination of the opening/closing door 3b can be sufficiently corrected and finely adjusted.

According to the sliding door device H according to the embodiment of the present invention, the upper guide rail 4 is attached to the cabinet body 2, and the opening/closing door 3b is arranged at a position offset to the front side of the upper guide rail 4. , the opening/closing door 3b has an upper mounting part 10 extending rearward toward the upper guide rail 4, and a moving roller 12 attached to the upper mounting part 10 and running on the upper guide rail 4 in the opening/closing direction. Since it is provided with a pulling means 30 that pulls up the upper mounting part 10 upward at a position between the opening/closing door 3b and the movable roller 12, even when the opening/closing door 3b is in a tilted state, the upper mounting part By raising 10, this slope can be corrected or finely adjusted. Thereby, it is possible to prevent the opening/closing door 3b from becoming difficult to open/close and from generating abnormal noises when opening/closing.

Further, the lifting means 30 includes a lifting part 31 located above the upper mounting part 10 and a moving roller for pulling 34 that moves as the opening/closing door 3b moves, and the vertical movement of the moving roller for pulling 34 is restricted. Therefore, the lifting moving roller 34 receives the load of the moment generated by the own weight of the opening/closing door 3b, thereby canceling out the moment of rotation in the opposite direction. Thereby, the inclination of the opening/closing door 3b can be corrected or finely adjusted.

Furthermore, since the pulling moving roller 34 is disposed on the rear side of the upper guide rail 4 and moves in the opening/closing direction on the auxiliary guide rail 20 which is separate from the upper guide rail 4, the opening/closing door 3b is not assembled in advance. Later, the auxiliary guide rail 20 can be installed. Therefore, maintenance of the lifting means 30 can be easily performed without removing the upper guide rail 4.

Further, the lifting means 30 is provided with a lifting amount adjustment screw 36 which is arranged above the movable roller 12 and is used to adjust the lifting amount in the vertical direction of the lifting portion 31, so that the inclination of the opening/closing door 3b can be adjusted more easily. Can definitely be modified or tweaked.

Furthermore, in the front-rear direction, the distance from the pulling moving roller 34 to the moving roller 12 is longer than the distance from the opening/closing door 3b to the moving roller 12, so when applying the rotational moment in the opposite direction as described above, In addition, the load that the moving roller for pulling 34 receives can be further reduced. Therefore, the diameter of the moving roller for pulling 34 can be kept small, and the auxiliary guide rail 20 and the pulling means 30 can be configured more compactly.

Although the sliding door device H according to the embodiment of the present invention has been described above, the present invention is not limited to the embodiments described above, and various modifications and changes can be made based on the technical idea of the present invention. be.

For example, in the present embodiment, the lifting means 30 is attached to the right opening/closing door 3b to adjust the inclination, but the lifting means 30 is similarly attached to the left opening/closing door 3a to adjust the inclination. Good too.
Further, as the pulling means 30, the lifting moving roller 34 is used to receive the load, but the invention is not limited thereto. That is, as long as the structure allows the upper mounting portions 10 of the opening/closing doors 3a, 3b to be pulled upward, the lifting portion 31 may be pulled up using a biasing force such as a spring. Alternatively, a weight may be attached to the rear end portion of the lifting portion 31 to apply a moment in the opposite direction to cancel the moment generated by the weight of the opening/closing doors 3a, 3b.

Further, in this embodiment, the lower side of the opening/closing door 3b is received by the lower guide rail 6, but the invention is not limited thereto. That is, in the present invention, the inclination of the opening/closing door 3b is adjusted by the configuration above the opening/closing door 3b. ) can also be applied.

1 Cabinet 2 Cabinet body 2a Top plate 2b Side plate 2c Bottom plate 3 Opening/closing door 3a Left opening/closing door 3b Right opening/closing door 4 Upper guide rail 4a, 6a Arc-shaped projection 5 Closer 6 Lower guide rail 8 Transparent plate member 9 Frame member 10 Upper mounting Part 10a Lower step part 10b Screw hole 11 Roller member 11a Moving roller adjustment screw 12 Moving roller 12a Arc-shaped groove 13 Lower mounting part 20 Auxiliary guide rail 21 Lower arc-shaped projection 22 Standing part 23 Upper arc-shaped projection 30 Pulling means 31 Pulling part 31a Long hole in the longitudinal direction 31b Screw hole 32 Vertical surface part 33 Lower bent part 34 Moving roller for lifting 34a Arc-shaped groove 34b Rotating shaft 35 Inclination adjustment screw 36 Pulling amount adjustment screw

Claims (5)

The cabinet includes an upper guide rail attached to the cabinet body, and an opening/closing door arranged at a position offset toward the front side of the upper guide rail, and the opening/closing door is attached to an upper side and extends rearward toward the upper guide rail. A sliding door device having a movable roller attached to the upper mounting portion and traveling in the opening/closing direction on the upper guide rail,
At the position of the moving roller, it comes into contact with the upper surface of the upper mounting part and serves as a fulcrum when pulling up the upper mounting part, and at a position between the opening/closing door and the moving roller, the upper mounting part is pulled upward. A sliding door device comprising: a lifting means for correcting the inclination of the opening/closing door by pulling it up and rotating it about the fulcrum . 2. The sliding door device according to claim 1, wherein the lifting means is provided with a lifting amount adjusting screw at a position serving as the fulcrum, and the lifting amount adjusting screw is brought into contact with the upper surface of the upper mounting portion. The lifting means has a lifting part located above the upper mounting part, and a moving roller for pulling up that moves as the opening/closing door moves, and the moving roller for pulling up and down is regulated. The sliding door device according to claim 1 or claim 2, characterized by: The sliding door according to claim 3 , wherein the moving roller for pulling up is disposed on the rear side of the upper guide rail and moves in the opening/closing direction on an auxiliary guide rail that is separate from the upper guide rail. Device. 5. The sliding door device according to claim 4 , wherein the distance from the pulling moving roller to the moving roller is equal to or longer than the distance from the opening/closing door to the moving roller in the front-rear direction.

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