JP7785341B2 - Interlocking sliding door device - Google Patents

Description

The present invention relates to a linked sliding door device in which, for example, three sliding doors move in tandem.

Conventionally, a sliding door interlocking device has been proposed that allows the type to be changed from one in which the sliding door located on the right side as viewed from the front is in front to one in which the sliding door located on the left side as viewed from the front is in front, simply by flipping the connecting member upside down (see, for example, Patent Document 1).

Japanese Patent Application Laid-Open No. 2007-270441

The sliding door interlocking device described in Patent Document 1 requires multiple types of connecting members to match the front-to-rear (depth) widths of the first through third sliding doors in order to interconnect them. Furthermore, the connecting members and fastening members must be attached with mounting bolts, which creates the problem of forcing the user to perform cumbersome assembly operations.

Furthermore, the sliding door interlocking device described in Patent Document 1 also had the problem of noise being generated when parts come into contact with each other when opening or closing the first through third sliding doors.

The present invention was made in consideration of the above-mentioned problems, and aims to provide an interlocking sliding door device and guide fittings that are simple in configuration, can be opened and closed quietly, and are easy to install.

The interlocking sliding door device of the present invention comprises a guide plate fixed to the upper end surface of one sliding door, pulleys attached to both longitudinal ends of the guide plate, a belt wound around the pulleys, a main body attached to the guide plate while being fixed integrally with the belt and slidable relative to the guide plate, and a guide fitting consisting of a connecting plate having two arms, at least one of which can be inserted into the main body, and which is detachably attached to the main body via at least one of the two arms.When at least one of the two arms of the connecting plate is inserted into the main body and attached, the guide fitting holds the shaft of a hoist attached to another sliding door that can overlap in the front-to-rear direction perpendicular to the opening and closing direction of the one sliding door, between the two arms.

In the present invention, it is preferable that the connecting plate has axle support members made of a soft material attached to the two arms at the locations where they come into contact with the shaft of the hoist.

In the present invention, when the two arms of the connecting plate are inserted into and attached to the main body, it is preferable that the distance from the bases of the two arms to the main body be longer than the diameter of the shaft.

The guide fitting of the present invention comprises a main body portion slidably attached to a guide plate fixed to the upper end surface of a sliding door via belts wound around two pulleys attached to both longitudinal ends of the guide plate; and a connecting plate having two arms, at least one of which can be inserted into the main body portion, and formed so as to be detachable from the main body portion via at least one of the two arms. When the connecting plate is attached with at least one of the two arms inserted into the main body portion, it holds the shaft of a hoist attached to another sliding door that can overlap in the front-to-rear direction perpendicular to the opening and closing direction of the first sliding door, between the two arms.

This aspect of the present invention makes it possible to realize an interlocking sliding door device and guide fittings that are simple in configuration, can be opened and closed quietly, and are easy to install.

1 is a perspective view showing the overall configuration of an interlocking sliding door device according to an embodiment of the present invention; 1 is an enlarged perspective view of a main part of an interlocking sliding door device according to an embodiment of the present invention. 1 is a plan view showing a configuration of an interlocking sliding door device according to an embodiment of the present invention. 1 is an exploded perspective view showing the configuration of a guide fitting of an interlocking sliding door device according to an embodiment of the present invention before a connecting unit is attached. FIG. 1 is a perspective view showing the configuration of a guide rail, a guide fitting, and a hoisting wheel of an interlocking sliding door device according to an embodiment of the present invention. 1 is an exploded perspective view showing the overall arrangement of a guide rail, pulleys, wire belt, and guide fittings of an interlocking sliding door device according to an embodiment of the present invention. FIG. 1 is a perspective view and an exploded perspective view showing the configuration of a guide rail, a pulley, a wire belt, and a guide fitting of an interlocking sliding door device according to an embodiment of the present invention. 1 is a perspective view showing the overall configuration of a guide fitting according to an embodiment of the present invention; FIG. 2 is an exploded perspective view showing the configuration of a main body of the guide fitting according to the embodiment of the present invention. 10 is a perspective view illustrating an engagement state between a main body of a guide fitting and a connecting plate according to an embodiment of the present invention. FIG. 1A and 1B are plan views showing the configuration of an interlocking sliding door device according to an embodiment of the present invention when fully open and when fully closed. FIG. 10 is a plan view showing the configuration of a guide fitting according to another embodiment of the present invention.

1. Overview of the Embodiments First, an overview of representative embodiments of the invention disclosed in this application will be described. Note that in the following description, as an example, reference numerals in the drawings corresponding to components of the invention are written in parentheses.

[1] In a representative embodiment of the present invention, an interlocking sliding door device (1) includes a guide plate (31) fixed to the upper end surface of one sliding door (12), pulleys (32) attached to both longitudinal ends of the guide plate (31), a belt (33) wound around the pulley (32), a main body (351) fixed integrally with the belt (33) and slidably attached to the guide plate (31), and two arms (353a), at least one of which can be inserted into the main body (351), and the two arms (353a) are and a guide fitting (35) consisting of a connecting plate (353) formed so as to be detachable from a main body (351) via at least one of the arms (353a). When at least one of the two arms (353a) of the connecting plate (353) is inserted and attached to the main body (351), the guide fitting (35) holds, between the two arms (353a), the shaft (211) of the hoist (21) attached to another sliding door (11) that can overlap in the front-to-rear direction (arrow ef direction) perpendicular to the opening/closing direction (arrow ab direction) of the one sliding door (12).

[2] In the interlocking sliding door device (1), the connecting plate (353) preferably has a shaft stopper (358) made of a soft material attached to the two arms (353a) at the locations where the shaft (211) of the hoist (21) comes into contact.

[3] In the interlocking sliding door device (1), when the two arms (353a) of the connecting plate (353) are inserted into and attached to the main body (351), the distance from the bases (353b) of the two arms (353a) to the main body (351) is longer than the diameter of the shaft (211).

[4] A guide fitting (35) according to a representative embodiment of the present invention has a main body (351) slidably attached to the guide plate (31) via a belt (33) wound around two pulleys (32) attached to both longitudinal ends of the guide plate (31) fixed to the upper end surface of one sliding door (12), and two arms (353a), at least one of which can be inserted into the main body (351), and at least one of the two arms (353a) The sliding door (12) is equipped with a connecting plate (353) that is detachably attached to the main body (351) via another arm (353a), and when at least one of the two arms (353a) of the connecting plate (353) is inserted and attached to the main body (351), the shaft (211) of the hoist (21) attached to another sliding door (11) that can overlap in the front-to-rear direction (arrow ef direction) perpendicular to the opening/closing direction (arrow ab direction) of the one sliding door (12) is inserted and held between the two arms (353a).

2. Specific Examples of Embodiments The configuration of an interlocking sliding door device according to a representative embodiment of the present invention will be described in detail below with reference to Figures 1 to 11. Note that the embodiments shown below are merely examples, and various other forms are possible within the scope of the present invention.

For ease of explanation, the opening and closing direction will sometimes be referred to as the left-right direction or horizontal direction. That is, the direction of arrow a, which opens the sliding door, will be referred to as the opening direction or leftward direction, and the direction of arrow b, which closes the sliding door, will be referred to as the closing direction or rightward direction. Furthermore, the direction of gravity (arrows cd) that is perpendicular to the opening and closing direction of the sliding door (arrows ab direction) will sometimes be referred to as the up-down direction. That is, the top side or upper side of the sliding door will be referred to as the direction of arrow c, and the bottom side or lower side of the sliding door will be referred to as the direction of arrow d.

Furthermore, the depth direction (arrow e-f direction) perpendicular to the opening and closing direction of the sliding door (arrow a-b direction) may be referred to as the front-to-back direction. In other words, the direction of arrow e, in which the sliding door points from the front to the back of the page, is the back side, and the direction of arrow f, in which the sliding door points from the back to the front of the page, is the front side. However, the left-to-right, up-down, and front-to-back directions are used for convenience of explanation, and may be defined as different directions depending on the usage situation of the sliding door.

(2-1) Embodiment of the present invention <Interlocking sliding door device>
As shown in Figures 1 to 5, the interlocking sliding door device 1 according to the embodiment of the present invention includes a top-hung interlocking sliding door 10 (Figure 1) consisting of a first sliding door 11, a second sliding door 12, and a third sliding door 13 that are arranged along guide rails 3, 4, and 5 (Figure 3) that are fixed in parallel in the front-to-rear direction (direction of arrow e-f) to the upper frame of an opening frame of a house or the like, a first hoist 21, a second hoist 22, and a third hoist 23, and an interlocking unit 30.

<Guide rail>
The guide rails 3, 4, and 5 all have the same structure. Therefore, only the central guide rail 4 in the front-to-rear direction (the direction of the arrow e-f) will be described here, and the other guide rails 3 and 5 will be omitted. The guide rail 4 is fixed to the upper frame of the sliding door, and is formed in a generally inverted U shape that opens downward, as shown in Figure 3.

The guide rail 4 comprises a top wall portion 4a extending in the longitudinal direction, a pair of side wall portions 4b extending downward from both short end edges of the top wall portion 4a, and a pair of flange portions 4c extending toward each other in the front-to-rear direction (in the direction of arrow e-f) from the downward tip edges of the pair of side wall portions 4b, and arranged apart and facing each other.

The pair of side walls 4b and the pair of flanges 4c extend longitudinally, just like the top wall 4a. With the second hoist 22 housed in the inverted U-shaped inner storage space, the guide rail 4 holds the second hoist 22 movably in the opening and closing directions (directions of arrows a and b) along the guide rail 3.

Therefore, with the first hoist 21 and third hoist 23 accommodated in the inverted U-shaped inner storage space of the guide rails 3 and 5, the first hoist 21 and third hoist 23 are held movably in the opening and closing directions (arrows a and b) along the guide rails 3 and 5.

<Sliding door>
The first sliding door 11, the second sliding door 12, and the third sliding door 13 are all sliding doors of the same structure, and only the second sliding door 12 will be described here, omitting the configurations of the other doors, the first sliding door 11 and the third sliding door 13. The reason why the second sliding door 12 will be described here is that the interlocking unit 30 is attached to the second sliding door 12, while the first sliding door 11 and the third sliding door 13 are not attached to the interlocking unit 30.

The second sliding door 12 is a top-hung sliding door and is made of a thin plate-like member that is roughly rectangular in plan view. However, the second sliding door 12 is not limited to this and may also be made of a transparent, thin glass-like member, or may be made of various other materials and in other shapes.

The second sliding door 12 has cutouts 12k (Figure 5) formed at both upper ends, and the hoist body 220 of the second hoist 22 (described below) is embedded in these cutouts 12k and fixed integrally.

In this embodiment, the sliding door configuration is exemplified by a three-piece structure consisting of a first sliding door 11, a second sliding door 12, and a third sliding door 13. However, the present invention is not limited to this, and any sliding door that opens and closes in conjunction with at least two doors may be used. For example, a sleeve wall may be used instead of the third sliding door 13.

<Hanging wheel>
The first hoist 21, the second hoist 22, and the third hoist 23 all have the same structure. Therefore, only the second hoist 22 will be described here, and the configurations of the other second hoist 22 and third hoist 23 will be omitted.

The second hoist 22 has a roughly rectangular parallelepiped hoist main body 220 that is housed in the cutout 12k of the second sliding door 12, a vertical adjustment bolt 221 that serves as a shaft extending upward (in the direction of arrow e) from the hoist main body 220, and a runner body 222 that is fixed integrally to the upper end of the vertical adjustment bolt 221.

The hoist main body 220 is embedded in the notch 12k provided at the upper end of the second sliding door 12 and is fixed integrally with the second sliding door 12.

The runner body 222 has a roughly rectangular parallelepiped runner main body 222a, two roller support shafts 223 journaled on both side ends of the runner main body 222a in the opening/closing direction (arrows a and b), and two rollers 224 (four in total) made of resin or the like journaled on each side of the roller support shafts 223 in the depth direction of the runner body 222 (arrows e and f).

As shown in Figure 3, the runner body 222 is able to move freely in the opening and closing direction (direction of arrows a and b) along the guide rail 4 by having four rollers 224 roll on the flange portion 4c of the guide rail 4. In other words, because the rollers 224, made of resin or the like, simply roll on the flange portion 4c in the inner space of the guide rail 4, the runner body 222 does not generate any running noise that may bother the user.

The runner body 222 is also fixed integrally to the upper end of the vertical adjustment bolt 221, which extends upward (in the direction of arrow e) from the hoist main body 220. That is, in the second hoist 22, the hoist main body 220 and the runner body 222 are integrated via the vertical adjustment bolt 221.

The vertical adjustment bolt 221 is a rod-shaped member of a predetermined length made of, for example, metal, and can be rotated clockwise or counterclockwise to adjust the distance between the hoist main body 220 and the runner body 222.

<Interlocking unit>
As shown in FIGS. 5 to 7, the interlocking unit 30 has a guide plate 31 attached to the upper end surface 12 t of the second sliding door 12 , a pulley 32 , a wire belt 33 , and a guide metal fitting 35 .

<Guide plate>
The guide plate 31 of the interlocking unit 30 is approximately the same size as the length from the end of the upper end face 12t of the second sliding door 12 in the opening direction (direction of arrow a) to the end in the opening direction (direction of arrow b) and the width of the second sliding door 12 in the front-to-back direction (direction of arrow ef).

The guide plate 31 has through-holes 31ha (Figures 6 and 7) formed on both the left and right longitudinal ends, and supports the pulley 32 rotatably and pivotally via a pulley shaft 32p fitted into the through-holes 31ha.

The guide plate 31 has two through holes 31hb at predetermined positions inside the two through holes 31ha on both the left and right ends, and is fixed to the upper end surface 12t of the second sliding door 12 via these two through holes 31hb using screws or the like (not shown).

Guide plate 31 has edges 31f (see Figure 3) that protrude with an L-shaped cross section at the rear (arrow e) and front (arrow f) ends. Edges 31f extend along the longitudinal direction of guide plate 31 from the left end (arrow a) to the right end (arrow b).

The main body 351 of the guide fitting 35, which will be described later, engages with this edge 31f, allowing the guide fitting 35 to slide freely in the opening and closing direction (the direction of arrows a and b). Because the main body 351 of the guide fitting 35 is made of resin or the like, it prevents metallic noises from occurring when sliding against the edge 31f of the guide plate 31.

<Pulley>
The pulley 32 is a thin cylindrical member made of resin or the like, and has an annular groove formed in the center in the vertical direction (direction of arrows cd) for hooking the wire belt 33. The pulley 32 is attached to the guide plate 31 in a rotatable and pivotable state via a bearing attached to the central pulley shaft 32p.

<Wire belt>
A wire belt 33 is wound around the two pulleys 32. Therefore, when the pulley 32 rotates around the pulley shaft 32p, the wire belt 33 moves in the opening direction (direction of arrow a) or the closing direction (direction of arrow b) along with the rotation of the pulley 32.

Two guide fittings 35 are attached integrally to the wire belt 33 (Figure 6) so that they are positioned as far apart as possible from each other. Specifically, the metal balls 352 integrated with the wire belt 33 fit into the main body 351 of the guide fittings 35, thereby integrating the two.

The main body 351 of one guide fitting 35 is integrated with the wire belt 33 by engaging with two metal balls 352 located in the closing direction (arrow a direction) in Figure 6 (B), and the main body 351 of the other guide fitting 35 is integrated with the wire belt 33 by engaging with one metal ball 352 located in the opening direction (arrow b direction).

As shown in Figure 6 (A), when one guide fitting 35 reaches the end of the guide plate 31 in the opening direction (arrow a direction), the other guide fitting 35 reaches the end of the guide plate 31 in the closing direction (arrow b direction).

<Guide bracket>
As shown in FIGS. 8 and 9, the guide fitting 35 is made up of a main body 351 and a connecting plate 353, and the connecting plate 353 is detachably attached to the main body 351.

The main body 351 has a roughly rectangular parallelepiped shape and includes an attachment space 351p into which the connecting plate 353 can be inserted and removed, and a storage space 351s into which the operating lever 355 can be attached, aligned horizontally (in the direction of arrows a and b).

The main body 351 (Figure 9) also has a screw hole 351ha for a screw 357 that acts as a stopper to restrict movement of the operating lever 355 at the right corner of the top surface 351t on the upper side (in the direction of arrow c), and also has a screw hole 351hb in the bottom surface that defines the storage space 351s, into which the tip of the screw 357 is attached.

Furthermore, the main body 351 has a pillar 351q located in the longitudinal center of the mounting space 351p, dividing the mounting space 351p in half. The pillar 351q serves to position the two arms 353a of the connecting plate 353, which will be described later, when they are inserted.

An engagement groove 351m, consisting of a recessed groove with an L-shaped cross section, is formed at the lower end of the main body 351 on the far side (in the direction of arrow e) opposite the mounting space 351p and storage space 351s, for engaging and sliding with the edge 31f of the guide plate 31 described above.

The main body 351 has an L-shaped protrusion 351z with an engagement groove 351m formed therein, and when the engagement groove 351m engages with the edge 31f of the guide plate 31, the lower surface 351zb of the protrusion 351z is set to be higher than the upper end surface of the second sliding door 12. In this case, even if the width of the second sliding door 12 in the front-to-rear direction (direction of arrow ef) becomes even wider and protrudes beyond the width of the guide plate 31, it will not come into contact with the lower surface 351zb of the protrusion 351z of the main body 351.

The operating lever 355 is housed and attached in the storage space 351s of the main body 351 so that it can slide left and right (in the direction of arrows a and b). The operating lever 355 is made of a thin, approximately rectangular metal plate-like member.

When the operating lever 355 is housed in the housing space 351s of the main body 351, only the lever portion 355r, which is generally triangular in plan view and protrudes toward the front (in the direction of arrow f), protrudes from the main body 351 toward the front (in the direction of arrow f) (Figure 8).

The operating lever 355 also has a protrusion 355t that protrudes toward the mounting space 351p of the main body 351. This protrusion 355t of the operating lever 355 is the part that engages with a recess 353u (Figure 8) of the connecting plate 353, which will be described later, and the engagement is released when the operating lever 355 is moved to the right (in the direction of arrow b).

On the right side (in the direction of arrow b), opposite the protrusion 355t of the operating lever 355, two protrusions 355v are formed to sandwich and hold an elastic body 356, such as a compression coil spring, in the storage space 351s. In other words, the elastic body 356 is positioned between these two protrusions 355v in the storage space 351s.

The elastic body 356 biases the operating lever 355, which is held in the storage space 351s of the main body 351, so that it presses down toward the left side (in the direction of arrow a) where the connecting plate 353 is located. At this time, the protrusion 355t of the operating lever 355 engages with the recess 353u of the connecting plate 353, maintaining the connecting state between the connecting plate 353 and the main body 351.

On the other hand, when the user pushes the lever portion 355r to the right (in the direction of arrow b), the operating lever 355 is moved to the right (in the direction of arrow b) against the biasing force of the elastic body 356, and the engagement between the protrusion 355t of the operating lever 355 and the recess 353u of the connecting plate 353 is released. This allows the connecting plate 353 to be removed from the main body portion 351.

The connecting plate 353 (Figure 8) is made of a thin metal plate-like member formed into a roughly U-shape overall, and has two arms 353a extending toward the back (in the direction of arrow e) toward the main body 351, and a base 353b that connects the two arms 353a at their bases in the left-right direction (in the direction of arrows ab).

A rectangular recess 353u is formed at the tip of each of the two arms 353a. The two recesses 353u are located at the tip of the two arms 353a so that they face each other back to back.

These recesses 353u are the portions into which the protrusions 355t of the operating lever 355 described above engage, and are wide enough to accommodate the protrusions 355t. Since the recesses 353u are formed at the tips of the two arms 353a, the connecting plate 353 can be attached upside down.

In addition, chamfered portions 353r, which are C-chamfered or R-chamfered, are formed at the tip corners of the two arms 353a near the recesses 353u. The two chamfered portions 353r are also arranged back to back.

A circular recess 353c is formed on each of the left and right ends of the base 353b. The two recesses 353c are used when the user grips the connecting plate 353 with their fingertips to attach it to the mounting space 351p of the main body 351, or when removing it from the mounting space 351p of the main body 351.

A U-shaped shaft support 358 made of a soft material is attached to the opposing portions of the two arms 353a and to a portion of the base 353b where the arms join.

The shaft stopper 358 is made of elastomer materials such as urethane rubber or silicone rubber. However, it is not limited to these materials, and various other materials can be used, such as fiber-based materials or plastic, as long as they are capable of absorbing impact and suppressing noise generation. The shaft stopper 358 covers both the top and bottom surfaces of the connecting plate 353.

<Attaching and detaching connecting plates in guide fittings>
As shown in Figure 10 (A), in the guide fitting 35, before the connecting plate 353 is inserted into the mounting space 351p of the main body 351, only the protrusion 355t of the operating lever 355 of the main body 351 protrudes from the storage space 351s.

As shown in Figure 10 (B), when the connecting plate 353 is inserted into the mounting space 351p of the main body 351 of the guide fitting 35, the chamfered portion 353r of the arm portion 353a of the connecting plate 353 comes into contact with the protrusion 355t of the operating lever 355.

As shown in Figure 10 (C), when the connecting plate 353 is inserted further back (in the direction of arrow e), the arm 353a pushes the operating lever 355 back to the right (in the direction of arrow b) against the biasing force of the elastic body 356.

As shown in Figure 10 (D), when the connecting plate 353 is inserted further back (in the direction of arrow e), the protrusion 355t of the operating lever 355 fits into and engages with the recess 353u of the connecting plate 353.

Conversely, to remove the connecting plate 353, the user pushes the lever portion 355r of the operating lever 355 to the right (in the direction of arrow b) with their fingertip. This disengages the protrusion 355t of the operating lever 355 from the recess 353u of the connecting plate 353.

Therefore, the user can easily remove the connecting plate 353 from the main body 351 by hooking their fingertips into the recess 353c of the connecting plate 353 and pulling it toward themselves (in the direction of arrow f).

<Installation of interlocking sliding door device>
Next, we will explain the installation procedure for the interlocking sliding door device 1. First, the first to third hoists 21 to 23 are attached to the guide rails 3 to 5 so that they can run, and the guide rails 3 to 5 are then fixed to the upper frame. A guide plate 31, to which a pulley 32, a wire belt 33, and the main body 351 of the guide metal fitting 35 are attached, is fixed in advance to the upper end surface 12t of the second sliding door 12.

Then, the hoist body portions 210, 220, 230 of the first to third hoist wheels 21 to 23 are fitted and fixed into the cutout portions 11t to 13t of the first to third sliding doors 11 to 13. This allows the first to third sliding doors 11 to 13 to be suspended from the guide rails 3 to 5 via the first to third hoist wheels 21 to 23.

Next, as shown in Figure 4, the main body 351 of the guide fitting 35 is slidably attached to the edge 31f of the guide plate 31 fixed to the upper end surface of the second sliding door 12, and a connecting plate 353 is attached to the main body 351.

In this case, the shaft portion of the vertical adjustment bolt 211 of the first hoist 21 attached to the first sliding door 11 is inserted between the two arms 353a of the connecting plate 353, and the connecting plate 353 is inserted into the mounting space 351p of the main body 351 of the guide fitting 35.

As a result, the main body 351 of the guide fitting 35 and the connecting plate 353 are connected via the up/down adjustment bolt 211 of the first hoist 21. In other words, as shown in Figure 2, the first sliding door 11 is connected to the second sliding door 12 via the guide fitting 35.

As shown in Figure 1, the second sliding door 12 and the third sliding door 13 are similarly connected to each other at the right end (in the direction of arrow b) of the guide plate 31 via the other guide fitting 35. In this way, the installation of the guide fitting 35 in the interlocking sliding door device 1 is much easier than in the past.

<Action and effect>
In the interlocking sliding door device 1 of this embodiment, as shown in FIG. 3, the main body portions 351 of one and the other guide fittings 35 are slidably attached to the edge portions 31f on both sides of the guide plate 31 fixed to the upper end surface of the second sliding door 12, and two connecting plates 353 are attached to the two main body portions 351 with the up and down adjustment bolts 211, 213 interposed between the two arms 353a.

As a result, the interlocking sliding door device 1 is connected via two guide fittings 35 so that the first sliding door 11 and the third sliding door 13 can move in conjunction with each other, with the second sliding door 12 at the center.

Specifically, as shown in Figure 11 (A), when the sliding doors are fully open, the first sliding door 11 to the third sliding door 13 are all completely overlapping in the front-to-back direction (in the direction of the arrow e-f), and the opening of the sliding door frame is at its maximum.

As shown in Figure 11 (B), when the sliding doors are fully closed, the overlap of the first sliding door 11 to the third sliding door 13 is at the point where the guide fittings 35 are present, i.e., it is minimal. At this time, the right end (arrow b direction) of the second sliding door 12 and the left end (arrow a direction) of the first sliding door 11 overlap via one guide fitting 35, and the left end (arrow a direction) of the second sliding door 12 and the right end (arrow b direction) of the third sliding door 13 overlap via the other guide fitting 35.

When the sliding door 11 is moved to the right (in the direction of arrow b) from when it is fully open to when it is fully closed, the wire belt 33 integrated with the main body 351 of the guide fitting 35 moves, pulling the second sliding door 12 and moving it to the right (in the direction of arrow b). At this time, the movement speed of the second sliding door 12 is set to half the movement speed of the first sliding door 11.

When the first sliding door 11 moves to the right (in the direction of arrow b) until it is fully closed, the main body 351 of one of the guide fittings 35 comes into contact with a stopper 11p fixed to the upper left end of the first sliding door 11, stopping the movement.

At this time, the main body 351 of the other guide fitting 35 comes into contact with the stopper 13p fixed to the upper right end of the third sliding door 13, stopping the movement of the second sliding door 12. Thus, the interlocking sliding door device 1 is brought into a fully closed state.

The vertical adjustment bolt 211 of the first hoist 21 and the vertical adjustment bolt 212 of the second hoist 22 are located between the two arms 353a of the connecting plate 353 attached to the main body 351 of the guide fitting 35, but the shafts of the vertical adjustment bolts 211, 212 contact the shaft stop 358 of the connecting plate 353 and do not contact the metal part of the connecting plate 353.

As a result, even when the first sliding door 11 to the third sliding door 13 move between the fully closed and fully open positions, the presence of the shaft stop 358 reduces the impact of the vertical adjustment bolts 211, 212 on the connecting plate 353, and prevents contact noises such as clatter, allowing the sliding doors to be opened and closed quietly.

In addition, because the guide plate 31 is fixed to the upper end surface 12t of the second sliding door 12, the guide plate 31 does not rattle, and no rattle noise is generated when it moves between the guide plate 31 and the second hoist 22. Incidentally, because the guide fittings 35 do not slide on the guide rails 3 to 5, even if the guide rails 3 to 5 are slightly twisted due to distortion of the lintel or the like, this does not interfere with the movement of the guide fittings 35 relative to the guide plate 31.

In addition, in the interlocking sliding door device 1, the arm portion 353a of the connecting plate 353 has a predetermined length, and when the connecting plate 353 is inserted and attached into the mounting space 351p of the main body portion 351, there is space in which the shaft portions of the up/down adjustment bolts 211, 213 can move in the front-to-rear direction (direction of arrow ef).

In other words, when the two arms 353a of the connecting plate 353 are inserted into and attached to the main body 351, the distance from the bases 353b of the two arms 353a to the main body 351 is set to be longer than the diameter of the shafts of the vertical adjustment bolts 211, 213.

As a result, even if the width of the first sliding door 11 to the third sliding door 13 in the front-to-rear direction (in the direction of the arrows e and f) is larger or smaller than the standard, the difference in width can be absorbed by the space created in the front-to-rear direction (in the direction of the arrows e and f) between the base 353b of the connecting plate 353 and the main body 351.

Therefore, with the interlocking sliding door device 1, there is no need to prepare guide fittings for each of the widths of the first sliding door 11 to the third sliding door 13 in the front-to-rear direction (direction of arrow e-f), and only one type of guide fitting 35 can be used.

In addition, the guide fittings 35 of the interlocking sliding door device 1 allow the connecting plate 353 to be easily removed from the main body 351 simply by operating the operating lever 355 horizontally without using any special tools. This makes it easy to separate the first to third sliding doors 11 to 13, which are connected to each other via the guide fittings 35, improving operability when removing them from the opening frame of a house, etc.

In addition, because the connecting plate 353 of the guide fitting 35 is made of metal, there is no risk of it being damaged due to insufficient strength even if it is pulled while in contact with the shafts of the up/down adjustment bolts 211, 212 when the first sliding door 11 and second sliding door 12 move in the opening/closing direction (direction of arrows a and b).

3. Other Embodiments In the above-described embodiment, the case where the present invention is applied to a top-hung interlocking sliding door 10 consisting of the first sliding door 11, the second sliding door 12, and the third sliding door 13 has been described, but the present invention is not limited to this, and may also be applied to a bottom-supported sliding door.

Furthermore, in the embodiment of the present invention, a case has been described in which both of the two arm portions 353a of the connecting plate 353 are inserted into the main body portion 351, but the present invention is not limited to this.

As shown in Figure 12, only one arm 353a of the connecting plate 353 may be shortened to approximately half its length, and only the other arm 353a may be inserted into the main body 351s, engaging the protrusion 355t of the operating lever 355 with the recess 353u of the connecting plate 353. In this case, the main body 351s can be set to be shorter in length in the horizontal direction (arrow ab direction) than the main body 351 (Figure 9).

The interlocking sliding door device 1 of the present invention is not limited to the above-described embodiment. Those skilled in the art can modify the interlocking sliding door device 1 of the present invention as appropriate, based on previously known knowledge. As long as such modifications still retain the configuration of the present invention, they are of course included within the scope of the present invention.

1...Interlocking sliding door device, 3, 4, 5...Guide rail, 10...Top-hung interlocking sliding door, 11...First sliding door, 12...Second sliding door, 13...Third sliding door, 21...First hoist, 22...Second hoist, 23...Third hoist, 30...Interlocking unit, 31...Guide plate, 32...Pulley, 33...Wire belt, 35...Guide fitting, 220...Hoist main body, 221 ...up and down adjustment bolt, 222...runner body, 222a...runner main body, 223...roller support shaft, 224...roller, 351...main body, 352...metal ball, 353...connecting plate, 353a...arm, 353r...chamfered portion, 355...operating lever, 355r...lever portion, 355t...protrusion, 353u...recess, 356...elastic body, 357...screw, 358...shaft stopper.

Claims (4)

a guide plate fixed to an upper end surface of one of the sliding doors;
pulleys attached to both longitudinal end portions of the guide plate;
a belt wound around the pulley;
a guide fitting including a main body portion slidably attached to the guide plate while being fixed integrally with the belt, and a connecting plate having two arms, at least one of which can be inserted into the main body portion, and formed so as to be detachable from the main body portion via at least one of the two arms;
Equipped with
When at least one of the two arms of the connecting plate is inserted into and attached to the main body, the guide fitting holds the shaft of a hoist attached to another sliding door that can overlap in the front-to-rear direction perpendicular to the opening and closing direction of the one sliding door, between the two arms. The interlocking sliding door device according to claim 1 , wherein the connecting plate has axle contacts made of soft materials attached to the two arm portions at locations where the connecting plate comes into contact with the shaft portions of the hoist. The interlocking sliding door device according to claim 1, wherein when the two arms of the connecting plate are inserted into and attached to the main body, the distance from the bases of the two arms to the main body is longer than the diameter of the shaft. a main body portion slidably attached to a guide plate fixed to an upper end surface of one sliding door via a belt wound around two pulleys attached to both longitudinal end portions of the guide plate;
a connecting plate having two arms, at least one of which can be inserted into the main body, and formed so as to be detachable from the main body via at least one of the two arms;
Equipped with
When at least one of the two arms of the connecting plate is inserted into and attached to the main body, the connecting plate holds the shaft of a hoist attached to another sliding door that can overlap in a direction perpendicular to the opening and closing direction of the one sliding door between the two arms.