Double sliding door device

Abstract

Provided is a double sliding door device with which two doors become flat when closed, and with which a first door and a second door can be opened simply by being pulled sideways. The double sliding door device is provided with: a first door attachment member (16) and a second door attachment member (17) to which the first door (1) and the second door (2) are attached; and a first abutting portion (18) and a second abutting portion (19) which are provided on the first door attachment member (16) and the second door attachment member (17), respectively, and which can abut one another. When the first door (1) and the second door (2) are in closed positions, the first door (1) and the second door (2) are flat. When the first door (1) in the closed position is pulled sideways, the first abutting portion (18) pushes the second abutting portion (19), the second door (2) is projected forward in response to the movement of the first door (1), and the first door (1) fits behind the second door (2). When the second door (2) in the closed position is pulled horizontally, the second abutting portion (19) pushes the first abutting portion (18), the first door (1) is projected forward in response to the movement of the second door (2), and the second door (2) fits behind the first door (1).

Description

Sliding door device

[0001] The present invention relates to a sliding door device for sliding open and closed two left and right doors horizontally.

[0002] Sliding doors that open and close by sliding two left and right doors horizontally are known. Generally, the two left and right doors are movably attached to parallel grooves or rails, and can be opened by sliding the desired door horizontally. However, this general sliding door has a problem that when in the closed position, the two left and right doors are displaced front and back, so the appearance is not good.

[0003] In order to solve this problem, Patent Document 1 proposes a sliding door device in which the two left and right doors are flat when in the closed position. This sliding door device includes a first door suspended movably on a guide rail, a lateral moving body supported movably on the guide rail, and a second door suspended on this lateral moving body via a parallel link mechanism.

[0004] When the first door is slid horizontally, the first door pushes the second door, and the second door protrudes forward by the parallel link mechanism, and the first door fits behind the second door. Therefore, the first door can be fully opened. On the other hand, when opening the second door, the second door is protruded forward using the parallel link mechanism, and the second door in this state is slid horizontally to move the second door to the front of the first door. Therefore, the second door can be fully opened.

[0005] Japanese Unexamined Patent Application Publication No. 2017-20164

[0006] However, in the sliding door device described in Patent Document 1, when opening the first door, it can be opened simply by sliding the first door horizontally, but when opening the second door, the second door needs to be protruded forward once and then the second door needs to be slid horizontally, so there is a problem that it is difficult to open the second door.

[0007] The present invention has been made in view of the above problems, and an object of the present invention is to provide a sliding door device in which two doors are flat when closed, and the first door and the second door can be opened simply by sliding them horizontally.

[0008] To solve the above problems, the present invention provides a sliding door device comprising a first door mounting member and a second door mounting member to which a first door and a second door are attached, and a first contact portion and a second contact portion provided on the first door mounting member and the second door mounting member or on the first door and the second door and capable of contacting each other, wherein when the first door and the second door are in the closed position, the first door and the second door become flat, when the first door in the closed position is pulled to the side, the first contact portion pushes the second contact portion, the second door extends forward in conjunction with the first door, and the first door fits behind the back of the second door, and when the second door in the closed position is pulled to the side, the second contact portion pushes the first contact portion, the first door extends forward in conjunction with the first door, and the second door fits behind the back of the first door.

[0009] According to the present invention, in a sliding door device in which two doors become flat when closed, the first door and the second door can be opened simply by pulling them sideways.

[0010] This is an external perspective view of a sliding door using the sliding door device according to the first embodiment of the present invention (a view of the sliding door from diagonally above, with Figure 1(a) showing the closed position of the first and second doors, Figure 1(b) showing the fully open position of the first door, and Figure 1(c) showing the fully open position of the second door). This is an external perspective view of a sliding door using the sliding door device according to this embodiment (a view of the sliding door from diagonally below, with Figure 2(a) showing the closed position of the first and second doors, Figure 2(b) showing the fully open position of the first door, and Figure 2(c) showing the fully open position of the second door). This is an external perspective view of the sliding door device (upper unit) according to this embodiment. This is an exploded perspective view of the sliding door device (upper unit) according to this embodiment (exploded perspective view from diagonally above). This is an exploded perspective view of the sliding door device (upper unit) according to this embodiment (exploded perspective view from diagonally below). This is an enlarged view of the first and second contact parts. This is an operation diagram of the sliding door device (upper unit) according to this embodiment when the first door is pulled sideways (Figure 7(a) shows the closed position of the first and second doors, Figure 7(b) shows the initial opening state of the first door, Figure 7(c) shows the state in which the second door is extended forward, and Figure 7(d) shows the fully open position of the first door). This is an operation diagram of the first and second contact parts when the first door is pulled sideways (Figures 8(a) to (c) correspond to Figures 7(a) to (c)). This is an operation diagram of the sliding door device (upper unit) according to this embodiment when the second door is pulled sideways. This is an operation diagram of the first and second contact parts when the second door is pulled sideways (Figures 10(a) to (c) correspond to Figures 9(a) to (c)). This is an external perspective view of the sliding door device (lower unit) according to this embodiment. This is an exploded perspective view of the sliding door device (lower unit) according to this embodiment. This is an external perspective view of the sliding door device (upper unit) according to the second embodiment of the present invention. This is an enlarged view of the first and second contact portions of the sliding door device (upper unit) according to the second embodiment of the present invention.

[0011] Hereinafter, an embodiment of the sliding door device of the present invention will be described with reference to the attached drawings. However, the sliding door device of the present invention can be embodied in various forms and is not limited to the embodiments described herein. This embodiment is provided with the intention that those skilled in the art will be able to fully understand the invention by making full disclosures in the specification. (First Embodiment)

[0012] Figures 1 and 2 show external perspective views of a sliding door S using sliding door devices 11 and 12 according to the first embodiment of the present invention. In Figure 1, the sliding door S is viewed from diagonally above, and in Figure 2, the sliding door S is viewed from diagonally below. Reference numeral 1 denotes the first door, reference numeral 2 denotes the second door, and reference numeral 3 denotes the housing.

[0013] The sliding door devices 11 and 12 according to this embodiment are attached to the upper and lower sides of the housing 3. Hereinafter, the sliding door device 11 attached to the upper side of the housing 3 will be referred to as the upper unit 11, and the sliding door device 12 attached to the lower side will be referred to as the lower unit 12. Furthermore, the configuration of the upper unit 11 and the lower unit 12 will be described below using the front view of the first door 1 and the second door 2 in the closed position, that is, the front-to-back, left-to-right, and up-and-down directions in Figure 1.

[0014] Referring to Figures 1 and 2, the operation of the sliding door device will be explained first. As shown in Figures 1(a) and 2(a), the upper unit 11 and the lower unit 12 make the first door 1 and the second door 2 flat when they are in the closed position. Flat means that the front surfaces of the first door 1 and the second door 2 are substantially on the same plane. Handles (not shown) are attached to the first door 1 and the second door 2. As shown in Figures 1(b) and 2(b), when a user or robot grasps the handle and pulls the first door 1 to the side, the upper unit 11 and the lower unit 12 move the second door 2 forward in conjunction with the first door 1, creating space behind the second door 2 to accommodate the first door 1, so that the first door 1 fits behind the second door 2. This allows the first door 1 to be fully opened. On the other hand, as shown in Figures 1(c) and 2(c), when a user or robot grasps the handle and pulls the second door 2 to the side, the upper unit 11 and the lower unit 12 move the first door 1 forward in conjunction with the second door 2, creating space behind the first door 1 to accommodate the second door 2, so that the second door 2 fits behind the first door 1. This allows the second door 2 to be fully opened. In this way, whether the first door 1 or the second door 2 is operated, the upper unit 11 and the lower unit 12 ensure that the operated door 1 or 2 and the other door 2 or 1 that is linked to the operated door 1 or 2 move in the same way.

[0015] The upper unit 11 and the lower unit 12 have the same configuration and are approximately symmetrical vertically. The configuration of the upper unit 11 will be mainly described below, and the same reference numerals will be used for components of the lower unit 12 that are the same as those of the upper unit 11.

[0016] Figure 3 shows an external perspective view of the upper unit 11, Figure 4 shows an exploded perspective view of the upper unit 11 viewed from diagonally above, and Figure 5 shows an exploded perspective view of the upper unit 11 viewed from diagonally below.

[0017] As shown in Figure 4, the upper unit 11 includes a first door mounting member 16 and a second door mounting member 17 to which the first door 1 and the second door 2 are attached, and a first contact portion 18 and a second contact portion 19 provided on the first door mounting member 16 and the second door mounting member 17 that can abut against each other.

[0018] The first door mounting member 16 and the second door mounting member 17 are movable along a guide rail 13 having inclined portions 14b, 14c, 15b, and 15c at both ends. The guide rail 13 comprises a first guide rail 14 and a second guide rail 15 of different lengths. The first guide rail 14 and the second guide rail 15 are attached to a base plate 20. The first guide rail 14 comprises a straight section 14a and inclined portions 14b and 14c at both ends. The second guide rail 15 comprises a straight section 15a and inclined portions 15b and 15c at both ends. One of the inclined portions 14b and 15b of the first guide rail 14 and the second guide rail 15 causes the second door 2 to protrude diagonally forward. The other inclined portion 14c and 15c causes the first door 1 to protrude diagonally forward. In this embodiment, the second door 2 and the first door 1 are positioned to protrude diagonally forward along the inclined portions 14b, 14c, 15b, and 15c of the guide rail 13, but they may also protrude forward along the curved portion of the guide rail 13.

[0019] The first door 1 is attached to the first door mounting member 16. As shown in Figure 5, the first door mounting member 16 has a first roller 21 and a second roller 22 on its lower surface that run on the first guide rail 14 and the second guide rail 15. The second door 2 is attached to the second door mounting member 17. The second door mounting member 17 has a first roller 23 and a second roller 24 on its lower surface that run on the first guide rail 14 and the second guide rail 15.

[0020] When the first door 1 is pulled sideways, the first roller 21 of the first door mounting member 16 travels along the straight section 14a of the first guide rail 14, and the second roller 22 of the first door mounting member 16 travels along the straight section 15a of the second guide rail 15. As a result, the first door 1 moves linearly along the first guide rail 14 and the second guide rail 15 (see Figures 7(a) to 7(d)).

[0021] Furthermore, when the first door 1 is pulled sideways, the first contact portion 18 pushes against the second contact portion 19, causing the first roller 23 of the second door mounting member 17 to move from the straight portion 14a to the inclined portion 14b of the first guide rail 14, and the second roller 24 of the second door mounting member 17 to move from the straight portion 15a to the inclined portion 15b of the second guide rail 15. As a result, the second door 2 protrudes forward along the inclined portion 14b of the first guide rail 14 and the inclined portion 15b of the second guide rail 15 (see Figures 7(a) to 7(d)). The same occurs when the second door 2 is pulled sideways.

[0022] As shown in Figure 4, a first contact portion 18 is attached to the first door mounting member 16. As shown in the enlarged view of Figure 6, the first contact portion 18 is equipped with a roller 26 and a cam 27 at the top and bottom. The roller 26 is rotatably mounted on the upper surface of the cam 27. An auxiliary roller 29 is rotatably mounted on the cam 27. The cam 27, roller 26, and auxiliary roller 29 are provided at the tip of the door edge guide rail 30 which is attached to the first door mounting member 16.

[0023] Similarly, the second contact portion 19 is equipped with a cam 31 and a roller 32 at the top and bottom. The roller 32 is rotatably mounted on the lower surface of the cam 31. An auxiliary roller 33 (see Figure 5) is rotatably mounted on the cam 31. The cam 31, roller 32, and auxiliary roller 33 are provided at the tip of the door edge guide rail 34 which is attached to the second door mounting member 17.

[0024] The first contact portion 18 may be attached to the first door 1, or if contact between the first door 1 and the second door 2 is permissible, a roller or cam may be directly provided on the first door 1. Furthermore, the second contact portion 19 may be attached to the second door 2, or if contact between the first door 1 and the second door 2 is permissible, a cam or roller may be directly provided on the second door 2.

[0025] The roller 26 of the first contact portion 18 contacts the cam 31 of the second contact portion 19, and the cam 27 of the first contact portion 18 contacts the roller 32 of the second contact portion 19. When the first door 1 is pulled sideways, the first contact portion 18 pushes the second contact portion 19, and as described above, the second door 2 moves forward along the inclined portion of the guide rail 13. Accordingly, as shown in Figures 8(a) to 8(c), the second contact portion 19 moves forward relative to the first contact portion 18 due to the action of the roller 26 of the first contact portion 18 and the cam 31 of the second contact portion 19. Similarly, when the second door 2 is pulled sideways, the first contact portion 18 moves forward relative to the second contact portion 19. The first contact portion 18 and the second contact portion 19, in conjunction with the inclined portions 14b, 15b, 14c, and 15c of the guide rail 13, play a role in stabilizing the forward protrusion of the first door 1 and the second door 2.

[0026] As shown in Figure 4, the first door mounting member 16 and the second door mounting member 17 are supported so as to be movable in the front-rear direction by the first interlocking member 36 and the second interlocking member 37, which are movable in the left-right direction. This configuration is in order to return the first door 1 and the second door 2, which have protruded forward, to the closed position, and also to hold the first door 1 and the second door 2 in the closed and open positions by the first bidirectional closer and the second bidirectional closer.

[0027] The first interlocking member 36 is movable in the left-right direction relative to the base plate 20. A straight rail 38 extending in the left-right direction is attached to the base plate 20. As shown in Figure 5, a pair of roller running bodies 40a and 40b that run on the rail 38 are attached to the lower surface of the first interlocking member 36. In order to stabilize the movement of the first interlocking member 36 along the rail 38, a pair of rollers 41a and 41b that run on the base plate 20 are provided on the lower surface of the front end of the first interlocking member 36.

[0028] Similarly, the second interlocking member 37 is movable in the left-right direction relative to the base plate 20. As shown in Figure 5, a pair of roller running bodies 42a and 42b that travel on the rail 38 are attached to the lower surface of the second interlocking member 37. In order to stabilize the movement of the second interlocking member 37 along the rail 38, a pair of rollers 43a and 43b that travel on the base plate 20 are provided on the lower surface of the front end of the second interlocking member 37.

[0029] As shown in Figure 4, the first door mounting member 16 is movable in the front-rear direction relative to the first interlocking member 36. A pair of straight rails 45a and 45b extending in the front-rear direction are attached to the upper surface of the first interlocking member 36. As shown in Figure 5, a pair of roller running bodies 46a and 46b that run on the pair of rails 45a and 45b are attached to the lower surface of the first door mounting member 16.

[0030] As shown in Figure 4, the second door mounting member 17 is movable in the front-rear direction relative to the second interlocking member 37. A pair of straight rails 47a and 47b extending in the front-rear direction are attached to the upper surface of the second interlocking member 37. As shown in Figure 5, a pair of roller running bodies 48a and 48b that run on the pair of rails 47a and 47b are attached to the lower surface of the second door mounting member 17.

[0031] As shown in Figure 4, first springs 51a and 51b are provided between the first door mounting member 16 and the first interlocking member 36 to return the first door 1, which has extended forward, to the closed position. One end of the first springs 51a and 51b is attached to a shaft fixed to the first interlocking member 36. As shown in Figure 5, the other end of the first springs 51a and 51b is attached to a shaft fixed to the first door mounting member 16. Although Figures 4 and 5 show the coil spring-shaped first springs 51a and 51b divided into two parts, in reality the first springs 51a and 51b are not cut.

[0032] As shown in Figure 4, second springs 52a and 52b are provided between the second door mounting member 17 and the second interlocking member 37 to return the second door 2, which has extended forward, to the closed position. One end of the second springs 52a and 52b is attached to a shaft fixed to the second interlocking member 37. As shown in Figure 5, the other end of the second springs 52a and 52b is attached to a shaft fixed to the second door mounting member 17. Although Figures 4 and 5 show the coil spring-shaped second springs 52a and 52b divided into two parts, in reality the second springs 52a and 52b are not cut.

[0033] As shown in Figure 4, the first interlocking member 36 is provided with a damper 54 that allows the first door 1, which returns to the closed position by the first springs 51a and 51b, to return slowly. This damper 54 is housed in a housing and can contact the bent piece 16a (see Figure 5) of the first door mounting member 16.

[0034] The second interlocking member 37 is provided with a damper 55 that allows the second door 2, which returns to the closed position by the second springs 52a and 52b, to return slowly. This damper 55 is housed in a housing and can contact the bent piece 17a (see Figure 5) of the second door mounting member 17.

[0035] As shown in Figure 4, a first bidirectional closer 56 is attached to the first interlocking member 36, which holds the first door 1 in both the closed and open positions.

[0036] A second bidirectional closer 57 is attached to the second interlocking member 37, which holds the second door 2 in both the closed and open positions. The first bidirectional closer 56 and the second bidirectional closer 57 are offset in the vertical direction.

[0037] As shown in Figure 7(d), a first trigger 61 is attached to the housing 3 to hold the first door 1 in the closed position. As shown in Figure 9(d), a second trigger 62 is attached to the housing 3 at a position symmetrical to the first trigger 61 to hold the second door 2 in the closed position. Also, as shown in Figure 7(d), a third trigger 63 is attached to the housing 3 to hold the second door 2 in the open position. As shown in Figure 9(d), a fourth trigger 64 is attached to the housing 3 at a position symmetrical to the third trigger 63 to hold the first door 1 in the open position.

[0038] The detailed operation of the upper unit 11 will be explained with reference to Figures 7 and 8. As shown in Figure 7(a), when the first door 1 and the second door 2 are in the closed position, the upper unit 11 makes the first door 1 and the second door 2 flat. At this time, as shown in Figure 8(a), the first contact portion 18 comes into contact with the second contact portion 19. As shown in Figures 7(b) and 7(c), when a user or robot grasps the handle and pulls the first door 1 to the side, the first contact portion 18 pushes the second contact portion 19, and the second door 2 moves forward along one of the inclined portions 14b and 15b of the first guide rail 14 and the second guide rail 15, against the spring force of the second springs 52a and 52b (see Figure 4). Consequently, as shown in Figures 8(b) and 8(c), the action of the roller 26 of the first contact portion 18 and the cam 31 of the second contact portion 19 causes the second contact portion 19 to protrude forward relative to the first contact portion 18. As shown in Figure 7(c), a space is created behind the second door 2 for the first door 1 to fit into, so that the first door 1 can be opened to the fully open position shown in Figure 7(d). Also, at this time, as shown in Figure 8(c), the roller 26 of the first contact portion 18 travels along the door edge guide rail 34 of the second contact portion 19, and the auxiliary roller 33 of the second contact portion 19 travels along the door edge guide rail 30 of the first contact portion 18, so that the protrusion of the second door 2 is also stabilized.

[0039] When the first door 1 is pulled sideways, it is desirable that the first contact portion 18 and the second contact portion 19 make contact before the first door 1 and the second door 2 come into contact. Furthermore, in order to prevent interference between the first door 1 and the second door 2, it is desirable to form notches 1a and 2a in the first door 1 and the second door 2 (see Figure 7(b)).

[0040] As shown in Figure 7(d), when the first door 1 moves to near the fully open position, the first bidirectional closer 56 catches the fourth trigger 64 (see Figure 9(d)), and the first bidirectional closer 56 automatically pulls the first door 1 to the fully open position. As a result, the fully open position of the first door 1 shown in Figure 7(d) is maintained.

[0041] When the first door 1 in the fully open position shown in Fig. 7(d) is pulled in the closing direction, the engagement of the fourth trigger 64 by the first bi-directional closer 56 is disengaged. After that, when the first door 1 is moved to near the closed position shown in Fig. 7(b), the first bi-directional closer 56 captures the first trigger 61, and the first door 1 is automatically pulled in by the first bi-directional closer 56 to the closed position shown in Fig. 7(a). Therefore, the closed position of the first door 1 shown in Fig. 7(a) is maintained.

[0042] The spring forces of the first springs 51a and 51b are stronger than the spring force of the first bi-directional closer 56, and the first bi-directional closer 56 does not pull in the first door 1 to the right side of the closed position of the first door 1 shown in Fig. 7(a).

[0043] On the other hand, when the first door 1 moves to the closed position shown in Fig. 7(a), the second door 2 automatically returns from the position protruding forward shown in Fig. 7(d) to the closed position shown in Fig. 7(a) by the second springs 52a and 52b.

[0044] Figs. 9 and 10 show the operation when the second door 2 in the closed position is pulled horizontally. The operation when the second door 2 is pulled horizontally is the same as when the first door 1 is pulled horizontally, so the same reference numerals are used and detailed description is omitted.

[0045] Fig. 11 shows an external perspective view of the lower unit 12, and Fig. 12 shows an exploded perspective view of the lower unit 12. The lower unit 12 has the same configuration as the upper unit 11. The lower unit 12 has the same function as the upper unit 11. The lower unit 12 is substantially vertically symmetric with the upper unit 11. Therefore, the same reference numerals as those of the components of the upper unit 11 are used for the components of the lower unit 12, and detailed description is omitted.

[0046] The configurations of the upper unit 11 and the lower unit 12 according to the present embodiment have been described above. According to the upper unit 11 and the lower unit 12 according to the present embodiment, the following effects are achieved.

[0047] In the overlapping sliding door S in which the two doors 1 and 2 are flat when closed, the first door 1 and the second door 2 can be opened simply by pulling them horizontally.

[0048] Since each of the first contact portion 18 and the second contact portion 19 includes rollers 26, 32 and cams 27, 31, and the roller 26 of the first contact portion 18 can contact the cam 31 of the second contact portion 19, and the roller 32 of the second contact portion 19 can contact the cam 27 of the first contact portion 18, the forward protrusion of the first door 1 and the second door 2 can be stabilized.

[0049] Since the rollers 26, 32 and cams 27, 31 of the first contact portion 18 and the second contact portion 19 are provided at the tip portions of the door-end guide rails 30, 34, the forward protrusion of the first door 1 and the second door 2 can be stabilized by the door-end guide rails 30, 34.

[0050] Since the first door mounting members 16 and the second door mounting members 17 are movable along the guide rail 13 having inclined portions 14b, 14c, 15b, 15c at both ends, the forward protrusion of the first door 1 and the second door 2 can be stabilized by the guide rail 13.

[0051] Since the guide rail 13 includes first guide rails 14 and second guide rails 15 having different lengths, and the first door mounting members 16 and the second door mounting members 17 each include first rollers 21, 23 and second rollers 22, 24 that run on the first guide rails 14 and the second guide rails 15, the movement of the first door 1 and the second door 2 along the guide rail 13 can be made more stable.

[0052] Since the first door mounting members 16 and the second door mounting members 17 are supported movably in the front-rear direction by the first interlocking members 36 and the second interlocking members 37 that are movable in the left-right direction, the first springs 51a, 51b and the second springs 52a, 52b can return the first door 1 and the second door 2 that protrude forward to the closed position. Also, the first door 1 can be held in the closed position and the open position by the first bi-directional closer 56 provided on the first interlocking member 36, and the second door 2 can be held in the closed position and the open position by the second bi-directional closer 57 provided on the second interlocking member 37. (Second Embodiment)

[0053] Figures 13 and 14 show external perspective views of a sliding door device (hereinafter referred to as the upper unit 71) according to the second embodiment of the present invention. The upper unit 71 of the second embodiment, like the upper unit 11 of the first embodiment, includes a guide rail 13 having inclined portions at both ends, a first door mounting member 16 and a second door mounting member 17 to which the first door 1 and the second door 2 are attached and which are movable along the guide rail 13, and a first contact portion 72 and a second contact portion 73 provided on the first door mounting member 16 and the second door mounting member 17 and which are able to abut each other. The first door mounting member 16 and the second door mounting member 17 are supported so as to be movable in the front-rear direction by a first interlocking member 36 and a second interlocking member 37 which are movable in the left-right direction. The configurations of the guide rail 13, the first door mounting member 16 and the second door mounting member 17, the first interlocking member 36 and the second interlocking member 37 are the same as those of the upper unit 11 of the first embodiment, so the same reference numerals are used and their descriptions are omitted.

[0054] In the upper unit 71 of the second embodiment, the first contact portion 72 is provided with only a cam 72a, and the second contact portion 73 is provided with only a cam 73a. The cam 72a of the first contact portion 72 and the cam 73a of the second contact portion 73 are in contact with each other. The cam 72a of the first contact portion 72 is provided at the tip of the door edge guide rail 30 which is attached to the first door mounting member 16. The cam 73a of the second contact portion 73 is provided at the tip of the door edge guide rail 34 which is attached to the second door mounting member 17.

[0055] Even if the first contact portion 72 and the second contact portion 73 are equipped only with cams 72a and 73a, they can perform substantially the same operation as the upper unit 11 of the first embodiment.

[0056] This specification is based on Japanese Patent Application No. 2024-212483, filed on December 5, 2024. All of its contents are included hereby.

[0057] 1…First door 2…Second door 11…Upper unit (device for sliding doors) 12…Lower unit (device for sliding doors) 13…Guide rail 14…First guide rail 14b, 14c…Inclined section 15…Second guide rail 15b, 15c…Inclined section 16…First door mounting member 17…Second door mounting member 18…First contact part 19…Second contact part 26, 32…Roller 27, 31…Cam 30, 34…Door edge guide rail 36…First interlocking member 37…Second interlocking member 56…First bidirectional closer 57…Second bidirectional closer 51a, 51b…First spring 52a, 52b…Second spring 71…Upper unit (device for sliding doors) 72…First contact part 72a…Cam 73…Second contact part 73a...cam

Claims

1. A sliding door device comprising a first door mounting member and a second door mounting member to which a first door and a second door are attached, and a first contact portion and a second contact portion provided on the first door mounting member and the second door mounting member or on the first door and the second door and capable of contacting each other, wherein when the first door and the second door are in the closed position, the first door and the second door become flat, when the first door in the closed position is pulled to the side, the first contact portion pushes the second contact portion, causing the second door to slide forward in conjunction with the first door and the first door to fit behind the second door, and when the second door in the closed position is pulled to the side, the second contact portion pushes the first contact portion, causing the first door to slide forward in conjunction with the second door and the second door to fit behind the first door.

2. The sliding door device according to claim 1, characterized in that the first contact portion and the second contact portion each include a roller and a cam, the roller of the first contact portion is capable of contacting the cam of the second contact portion, and the roller of the second contact portion is capable of contacting the cam of the first contact portion.

3. The sliding door device according to claim 1, characterized in that the first contact portion and the second contact portion each have a cam that can come into contact with each other.

4. The sliding door device according to claim 2, characterized in that the cam and roller of the first contact portion and the second contact portion are provided at the tip of the door edge guide rail.

5. The sliding door device according to any one of claims 1 to 4, characterized in that the first door mounting member and the second door mounting member are movable along a guide rail having inclined or curved portions at both ends, and when the first door in the closed position is pulled sideways, the second door extends forward along one of the inclined or curved portions of the guide rail, and when the second door in the closed position is pulled sideways, the first door extends forward along the other inclined or curved portion of the guide rail.

6. The sliding door device according to claim 5, characterized in that the guide rail comprises a first guide rail and a second guide rail of different lengths, and the first door mounting member and the second door mounting member each comprise a first roller and a second roller that run on the first guide rail and the second guide rail, respectively.

7. The sliding door device according to any one of claims 1 to 4, characterized in that the first door mounting member and the second door mounting member are supported by a first interlocking member and a second interlocking member that are movable in the left-right direction and are movable in the front-rear direction.

8. The sliding door device according to claim 7, characterized in that it is provided with a first spring and a second spring for returning the first door and the second door, which have protruded forward, to the closed position.

9. The sliding door device according to claim 7, characterized in that the first interlocking member is provided with a first bidirectional closer for holding the first door in a closed position and an open position, and the second interlocking member is provided with a second bidirectional closer for holding the second door in a closed position and an open position.

Images