JP2004244985A - Sliding door using link type open-close mechanism - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sliding door, in which an opening width is expanded while a cleaning is easily thorough and open-close labor is reduced. <P>SOLUTION: Fixed supporting points 16 are fitted to all of five sliding doors, in which the widths of the central sliding doors 11 are doubled approximately to those of the left/right central/end sliding doors 12 and 13, one ends of long links 31 and short links 32 are combined singly and connected to the supporting points and a link type open-close mechanism is formed by free supporting points 17, where the mutual centers and mutual other ends of the long links and the centers of the long links and the other ends of the short links are connected. When the arbitrary sliding door is moved, the sliding doors are constituted so that the whole is also moved in the same direction while the left-right central/end sliding doors are directed towards the center sliding doors. When the open-close mechanism and the fractionated sliding doors are combined, the opening widths can be expanded and all the sliding doors be opened and closed in a single operation, and the cleaning is also conducted easily. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
[Industrial applications]
The present invention relates to a sliding door opening / closing device used for an opening of a building or furniture.
[0002]
[Prior art]
Structures that involve the entry and exit of people and objects have numerous openings for lighting and ventilation in addition to entrances and exits, and fittings suitable for the purpose are attached. Doors, sliding doors, louvers, and the like are used for the entrances of people and things, and the louvers are often used together with the sliding doors. Furniture used inside the building also has an opening through which objects can enter and exit, and the opening is covered using a door or sliding door as in the building, but it is not large but light and simple.
[0003]
The door pivots around the hinge and moves forward and backward, while the sliding door moves laterally along the guides provided on the upper and lower frames. The convenience of use in both buildings requires considerable opening / closing space before and after the opening for the door, and the sliding door requires opening / closing space including escape in the lateral direction, but it is less than the door. Although the doors are highly confidential, sliding doors have also been significantly improved with advances in materials and construction.
[0004]
Both large and small doors and sliding doors are used. However, large doors are limited to places where opening and closing spaces can be easily secured, and there are many small doors mainly for people. Sliding doors with small open / close spaces are used in many places regardless of size. Whereas doors are limited to one or two doors, sliding doors start with one and two or more doors are used in abutting or overlapping (pulling).
[0005]
[Problems to be solved by the invention]
Large and heavy doors can be easily moved by using hinges, and the opening width of the door when fully opened is equal to the opening width of the door frame, regardless of whether the door is one-sided or double-doored. On the other hand, a large and heavy sliding door can be easily moved by attaching wheels or the like, but the opening width when fully opened depends on the number of sliding doors in the door frame, but is far from the opening width obtained by the door. However, there is no problem with the opening width in a single sliding door provided with a storage allowance.
[0006]
Most windows, closets and partitions use double sliding doors with no storage allowance. The multiple sliding doors have a feature that a part of the sliding doors overlap when closed. Therefore, when fully opened, half or more of the opening width is closed by the sliding door (see FIG. 1). This overlap is an obstacle to cleaning the frame, sometimes requiring the sliding door to be removed. This problem also applies to sliding door furniture.
[0007]
For example, when three sliding doors are used, the opening width is increased, but the labor for opening and closing (see FIG. 2) is surely increased. In addition, accordion-type simple partitioning materials used for partitions, closets, etc. have the advantage of being easy to open without taking up space by folding. It is not a suitable fitting in the place where it comes. An object of the present invention is to provide a sliding door that solves the above problems.
[0008]
[Means for Solving the Problems]
The present invention relates to an opening / closing means for an opening comprising a door frame and a sliding door,
At least three sliding doors are incorporated in the door frame, and a fixed fulcrum, a free fulcrum, and a fulcrum selected from the movable fulcrum are provided on each sliding door, and any one of the long link and the short link is used alone or in combination to connect between the fulcrums, This is a sliding door that uses a link-type opening and closing mechanism that is configured so that when an arbitrary sliding door moves, the entirety moves in the same direction.
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
The present invention, in order to solve the problem that the sliding door installed in the opening closes the substantial width of the opening, at least three sliding doors are incorporated in the door frame, and when any sliding door is moved, all the sliding doors are one-touch in the same direction. Sliding door using a moving link opening and closing mechanism. Therefore, in addition to eliminating an increase in the number of opening and closing operations caused by a plurality of sliding doors, the utilization of the opening width is expanded.
[0010]
When attaching a link-type opening / closing mechanism to a sliding door, the conditions under which the link moves smoothly are related to the size of the sliding door, the number of connections, the presence or absence of means to reduce sliding friction, the gap between the sliding doors and the direction of movement, and the angle made by the link. I do. Usually, the maximum number of sliding doors that can be smoothly moved by one link is three, and the minimum value of the angle α between the moving direction and the link is preferably 30 ° or more.
[0011]
When a plurality of links are used for a plurality of sliding doors, the links are connected in a cross shape, a V shape, an inverted V shape, or the like. An increase in sliding doors may cause a decrease in overall movement, so measures to reduce friction may be required. Further, since the opening / closing force is increased by the angle of the link and the size of the member is increased, the length of the link is changed or a combination of long and short links is used.
[0012]
The sliding door and the link are connected via a fulcrum selected from a fixed fulcrum, a free fulcrum and a movable fulcrum. The length, number and combination of the links change depending on the selected fulcrum. For example, in case of fixed and free fulcrum or fixed, free and movable fulcrum, multiple long and short links are crossed, and in case of fixed and movable fulcrum, one long link, fixed and movable In the case of a fulcrum, a plurality of long links or short links are used in combination in a V-shape or an inverted V-shape.
[0013]
The fixed fulcrum moves with the sliding door. The free fulcrum only connects the long and short links and has no direct relation to the sliding door. The moving fulcrum moves along a guide frame in a specific direction such as upper or lower provided on the sliding door. The link is rotatably attached to each fulcrum, but a difference in the acting force on the link and the fulcrum occurs depending on the distance from the fixed fulcrum to each free or movable fulcrum.
[0014]
A fixed fulcrum is provided for all five sliding doors whose center sliding doors are approximately double the width of the left, right, and middle sliding doors, and one end of the long link and short link are connected to the fixed fulcrum individually or in combination. When the sliding door moves freely, the left, right middle and end sliding doors face the central sliding door when the sliding door moves, and the whole is in the same direction. A sliding door using a moving link type opening / closing mechanism is obtained (see FIG. 4).
[0015]
In addition, each of the five sliding doors whose central sliding door is about twice as wide as the left, right, middle and end sliding doors, has either a fixed fulcrum or a movable fulcrum, and two long links placed on the left and right of the central sliding door When the sliding door is connected and the two long links are connected to the fulcrum of the central sliding door and the sliding door moves, the left, right, and middle sliding doors face the central sliding door, and the entire link moves in the same direction. A sliding door using the mechanism is obtained (see FIG. 8).
[0016]
Either a fixed fulcrum or a moving fulcrum is provided for each sliding door in a three-sliding door, and one fulcrum is connected with one long link, or a fixed fulcrum is provided on both ends of the sliding door and one end of two short links is provided. And the other end of both short links is connected to a moving fulcrum that moves up and down along the guide frame provided on the middle sliding door, and when a sliding door moves, the entire link moves in the same direction A sliding door is obtained (see FIG. 13).
[0017]
The opening width obtained by fully opening the sliding door is the remainder obtained by subtracting the maximum sliding door width from the opening width of the door frame. In order to obtain a utilization width close to the opening width of the door frame, at least three sliding doors are connected by a link and stacked on one side, and integrated with a part of an upper frame incorporating a sliding door guide device. Similar to a door, the door is rotated from the end of the frame and pushed out of the frame by rotating means provided between the door frame and the door (see FIGS. 15 and 16).
[0018]
If it is difficult to maintain a constant gap between the sliding doors when attaching the link type opening and closing mechanism to the sliding door, excessive force will act on the fulcrum and the link, and the smooth movement of the whole will be lost, which may cause a malfunction. is there. Therefore, in the case of a suspended sliding door, it is desirable to provide a restraining means such as a groove between the sliding doors as long as the movement in the traveling direction is not hindered. There is no need for a truck drive type.
[0019]
[Action]
As for a plurality of sliding doors connected by a link, when any sliding door is moved, all sliding doors can be moved simultaneously.
[0020]
Embodiment 1
3 (A) to 3 (H) are transition diagrams in which the sliding doors at both ends are pushed in the direction of the arrow and are gathered at the center and are brought to the left end, and FIGS. 3 (I) to 3 (N) are the right end. It is the transition figure which pushed the sliding door and was brought to the left end. FIGS. 4A and 4B are a back view and a cross-sectional top view of the crossed long / short link in the fully closed state. FIGS. 5A and 5B are a rear view and a cross-sectional top view of the fully opened state of FIG. FIG. 6 (A, B, C) is a top view of the fixed fulcrum and the free fulcrum. FIGS. 7A and 7B are cross-sectional views of the restraining portion between the anti-friction mechanism and the sliding door.
[0021]
In the five-sliding door of FIG. 3, the central sliding door 11 is about twice as wide as the middle / end sliding doors 12, 13. When the middle and end sliding doors are moved and overlapped with the central sliding door, the use width obtained by subtracting the maximum width of the sliding door from the opening width of the door frame 1 increases from about 1/2 to about 2/3 of the double sliding door. When the sliding doors are subdivided into five or more sheets, the width of use increases, but the thickness of the entire sliding doors increases, and it becomes difficult to connect the links.
[0022]
As shown in FIGS. 4 (A, B) and 5 (A, B), fixed fulcrums 16 are placed at the center, middle and end sliding doors 11, 12, and 13, long links 31 are provided at both sliding doors, and long links are provided at other sliding doors. The link is connected to the short link 32 or the long link. Except for the fixed fulcrum, the long link and the short link are connected by a free fulcrum 17. The angle α formed between each link and the sliding door traveling direction is 30 ° or more.
[0023]
When the left and right end sliding doors 13 are pushed in the direction of the central sliding door 11, all the middle and end sliding doors gather toward the central sliding door, and an opening having about 1/3 of the opening width is formed at both ends of the door frame 1. In addition, even if an arbitrary sliding door is pushed, the whole sliding door is moved in the pushing direction while the entire middle / end sliding door faces the central sliding door, and an opening of about 2/3 of the opening width is created. The link mechanism moves multiple sliding doors with one touch to reduce the opening and closing labor, and eliminates the opening width of 1/2 or less due to the overlap of two sliding doors and the problem of cleaning.
[0024]
The fixed fulcrum 16 of the central sliding door 11 in FIG. 6A is composed of a bracket 20 and a pin 21 and shares two long links 31. FIG. 7B shows another fixed fulcrum in which the middle and end sliding doors 12 and 13 share the long link and the short link 32 or connect only the long link. A free fulcrum 17 in FIG. 3C connects long links or long / short links. The fixed fulcrum moves horizontally and the free fulcrum moves on the working radius of the link.
[0025]
FIG. 7 (A) shows the sliding door suspended from wheels 35 moving along the upper rail 34 in the groove 6 of the upper frame 2 and supported by the guide 36 attached to the lower end and the lower rail 37 in the groove 7 of the lower frame 3. A restraining means 38 such as an intervening groove 39 and a dovetail groove 40 is provided. 4B, the sliding door rides on wheels 42 running on the lower rail 41 in the groove 7 of the lower frame 3 and is supported by the upper rail 43 and the guide 44 in the groove 6 of the upper frame 2.
[0026]
Embodiment 2
FIG. 6D is a perspective view of a movable fulcrum in a link mechanism for a five-sliding door according to another embodiment. FIGS. 8A and 8B are a rear view and a cross-sectional top view of a sliding door and two long links in a fully closed state. 9A and 9B are a rear view and a cross-sectional top view of the fully opened state of FIG. FIG. 10 (A, B, C, D) is an operation comparison diagram of a long link, a fixed fulcrum, and a movable fulcrum. FIGS. 11A and 11B are a front view and a side view of a long link, a fixed fulcrum, and a movable fulcrum.
[0027]
The transition of the opening / closing operation of the sliding door is as shown in FIGS. The size of the sliding door, the link angle α, the structure of the fixed fulcrum, and the like are also the same, and portions different from the first embodiment will be described. As shown in FIGS. 8 (A, B) and 9 (A, B), one fixed fulcrum 16 and two movable fulcrum 18 are distributed to one long link 31, and the left and right sliding doors 12 and 13 are connected. The right long link 31 is connected and shared in an inverted V-shape at the moving fulcrum of the central sliding door 11. The movements of the fixed fulcrum and the movable fulcrum on the long link are shown in FIG. 10 (A, B, C, D).
[0028]
10A, the center of the long link 31 is connected to the fixed fulcrum 16 of the left and right middle secondary doors 12, and both ends are connected to the central sliding door 11 and the moving fulcrum 18 that moves along the guide frame 22 of the entire middle sliding door 12. I do. In FIG. 7B, in this example, the center of the long link is connected to the fixed fulcrum of all the sliding doors, and both ends are connected to the moving fulcrum of the center sliding door and the all-end sliding door. In FIG. 3C, the upper end of the long link is connected to the fixed fulcrum of the center sliding door, the center is connected to the whole sliding door, and the other end is connected to the moving fulcrum of the sliding door at all ends.
[0029]
FIG. 10 (D) shows that at the position of the fixed fulcrum 16 of the link, the fulcrum configuration is divided into two fixed and three moving or one fixed and four moving, and a difference in the moving distance of the moving fulcrum 18 due to the change of the working radius. ing. When the fixed fulcrum is at the center of the link, the movement of the moving fulcrum at both ends is the same, but when the fixed fulcrum is at the end of the link, the distance H to move at the position of the moving fulcrum differs.
[0030]
FIGS. 11A and 11B correspond to a state in which one long link is removed from the configuration of the fixed fulcrum 16 and the movable fulcrum 18 arranged on the two long links 31 in FIG. 10B. As shown in FIG. 8 (C), a wheel 24 moving around a pin 23 attached to the center of the moving fulcrum of the long link fits in the upper and lower guide frames 22 provided on the sliding door and moves to move the fulcrum to the sliding door. Tell and move.
[0031]
Embodiment 3
FIG. 12 is an opening / closing operation diagram of the triple sliding door. FIGS. 7A to 7F are transition diagrams in which the rightmost sliding door is pushed to the left end. In this example, instead of the two long links used in the five sliding doors of the second embodiment, three sliding doors having the same or similar size are connected to one long link (see FIGS. 8 and 9). Therefore, the used members are common, and the functions, effects, and angle conditions obtained from the same members are the same.
[0032]
Embodiment 4
It is a link type opening / closing mechanism of another mode used for a triple sliding door. The opening and closing operation of the sliding door is as shown in FIG. 12 of the third embodiment, except that a short link is used instead of a long link. FIGS. 13A and 13B are a rear view and a cross-sectional top view of the sliding door in a fully closed state. FIGS. 14A and 14B are a rear view and a cross-sectional top view of FIG. 13 in a fully opened state. The basic structures of the fixed fulcrum and the movable fulcrum are the same as those used in the first to third embodiments.
[0033]
As shown in FIGS. 13 (A, B) and 14 (A, B), the short link 32 is connected to the fixed fulcrum 16 attached to the end sliding door 13. The sliding door 12 is provided with a guide frame 22, and at one end of a guide rod 33 with wheels 24 that moves up and down along the guide frame, a movable fulcrum 18 is provided in which both short links are connected and shared in an inverted V-shape. Alternatively, a wheel may be directly attached to the connection point to provide a moving fulcrum without a guide rod.
[0034]
The moving direction and the angle α of the sliding door using only the short link 32 are the same as those in the first embodiment. In the third embodiment, the number of fulcrums combined with the long link is fixed one and movable two. However, the number of fulcrums in the case of a short link is the same, and the content changes to fixed two and movable one, and the number of links increases. The effects obtained from this link mechanism are the same as those of the first to third embodiments, and a structure according to FIGS. 7A and 7B is used as necessary.
[0035]
The use of short links simplifies the structure compared to other embodiments, but the preferred number of sliding door connections is three. In order to accommodate three or more sliding doors, a long link is required in addition to a short link, and the number of fulcrum structures is increased as the number of fulcrum configurations is fixed / free / movable, thereby reducing the practicality (not shown). Therefore, it can be said that the link mechanism of the first or second embodiment is suitable for three or more sliding doors.
[0036]
Embodiment 5
FIGS. 3 (O) and 3 (P) are open / close operation diagrams of the five sliding doors, showing a state in which the utilization of the opening width of the first and second embodiments is further improved. The opening width obtained from the sliding door in this state is close to that obtained from the door. FIG. 15 is a top view showing a state in which the five sliding doors which are fully opened to one side are rotated and pushed out together with a part of the upper frame. FIG. 16 is a perspective view of the state of FIG.
[0037]
Unless the sliding door has a dedicated storage unit, even if the sliding door in the door frame 1 is subdivided, it does not reach the utilization of the opening width when the door is used. In the sliding doors of the first to fourth embodiments, the opening and closing operation is made one-touch by a link-type opening and closing mechanism to make it easy to handle. However, the opening width obtained by bringing all the sliding doors to one end is about 2 times the opening width W of the door frame. It stops at about / 3.
[0038]
In this example, a door function was added to the sliding door to enable a usage width close to the opening width of the door frame. This function is suitable for an opening of a building, furniture, or the like, in which the space around the opening is limited when objects to enter and exit have various sizes. That is, a part of a guide device such as a rail is integrated with all sliding doors being moved to one end, and then the door is rotated out of the frame like a door.
[0039]
As shown in FIG. 15, a part of the upper frame 2 of the door frame 1 is rotated as shown in FIG. A rotating means 45 having a hinge function is provided between the upper frame lower stage 5 and the vertical frame, and is connected to the upper stage so as to be pivotable. The upper frame lower section 5 of the turning portion includes an upper rail 34, wheels 35, and the like that fit in the groove 6 shown in FIG. 7A.
[0040]
Further, when the sliding door is turned, the wheels 35 suspended from the upper rail 34 in the sliding door of FIG. 7A are restrained so as not to come off during the turning, and guidance when the two-stage separated portion returns to the original position (for example, In addition, the lower guide 36 is attached or detached or provided with an elevating function so as not to cause an obstacle at the time of turning, so that the entire sliding door is turned. Operation proceeds smoothly.
[0041]
When the sliding door rides on the wheel 42 as shown in FIG. 7B, a part of the lower frame 3 is also separated as in FIG. 7A, and a part of each of the upper, lower and vertical frames is integrated. Be able to turn. Further, the sliding door may be turned with the exposure exposed. However, if the direction of moving the sliding door is determined, the door pocket 14 may be provided and stored, and the door pocket may be turned. This pivoting system can be used from two sliding doors.
[0042]
【The invention's effect】
The following effects are obtained from the sliding door using the link type opening / closing mechanism of the present invention.
(1) When any sliding door is moved with this mechanism, all the sliding doors move with one touch, greatly reducing the time required for opening and closing.
(2) This mechanism can be applied to both large and small sliding doors.
(3) This mechanism can also be applied to heavy sliding doors by using friction measures such as wheels.
(4) Subdivide the sliding door to increase the use of the opening width.
(5) It is possible to cope with an increase in the number of sliding doors by using a plurality of links.
{Circle around (5)} The present mechanism can be applied not only to buildings such as buildings, but also to fixed and mobile furniture.
(7) This mechanism requires little maintenance because it has a structure that does not cause a breakdown.
(8) The turning of the sliding door provides an opening width corresponding to a door that is opened and closed by a hinge, and the opening and closing space required for the door is reduced due to the subdivision of the sliding door.
(9) No expensive equipment costs are required.
[0043]
Sliding doors that use a link-type opening / closing mechanism can be used for vehicles such as garages or warehouses, frequent entrances and exits of goods and people, entrances and entrances of houses where it is difficult to use doors, and the width of use of openings may be small. There are doorways, furniture openings, and the like that may be used widely. When the present invention is applied to these, the effects of easy opening and closing and an increase in the opening width can be equally obtained.
[Brief description of the drawings]
FIG. 1 shows the order of opening two sliding doors (A) to (D) and the opening width.
FIG. 2 shows an example (A) to (F) of an order of opening three sliding doors and an opening width.
3 (A) to (H) are transition diagrams in which the sliding doors at both ends are pushed in the direction of the arrow and are gathered at the center, and are shifted to the left end; FIGS. It is the transition figure which pushed the right end sliding door and was brought to the left end. (0) and (P) are opening and closing operation diagrams of the fifth embodiment.
4A and 4B are a rear view and a cross-sectional front view of a long / short link crossing a sliding door in a fully closed state.
5A and 5B are a rear view and a cross-sectional front view of the fully opened state in FIG. 4;
6A and 6B are a side view and a perspective view of fixed, free, and movable fulcrums, respectively.
FIGS. 7A and 7B are a sectional view of the anti-friction structure and a sectional view of a restraining portion between sliding doors.
8A and 8B are a rear view and a cross-sectional top view of a sliding door and two long links in a fully closed state according to another embodiment of the five sliding door of the second embodiment.
9A and 9B are a rear view and a cross-sectional top view of the fully opened state of FIG.
FIG. 10 (A, B, C, D) is a comparison of the position and movement of each fixed and moving fulcrum on a long link.
11A and 11B are a front view and a side view of a long link, a fixed fulcrum, and a movable fulcrum.
12A to 12F are opening / closing operation diagrams of three sliding doors connected by one long link according to the third embodiment, and FIGS. 12A to 12F are transition diagrams in which the rightmost sliding door is pushed to the left end.
13A and 13B are a back view and a cross-sectional view of a sliding door in a fully closed state according to a fourth embodiment.
14A and 14B are a back view and a cross-sectional top view of the fully opened state of FIG.
FIG. 15 is a top view showing a state in which the five-sliding door fully opened to one side of the fifth embodiment is rotated and pushed together with a part of the upper frame.
FIG. 16 is a perspective view of the state of FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Door frame 2 Upper frame 3 Lower frame 4 Vertical frame 11 Central sliding door 12 Middle sliding door 13 End sliding door 16 Fixed fulcrum 17 Free fulcrum 18 Moving fulcrum 22 Guide frame 24 Wheel 31 Long link 32 Short link 33 Guide rod 38 Restraining means 45 Rotating means

Claims (7)

In the opening and closing means of the opening consisting of the door frame and the sliding door,
At least three sliding doors (11, 12, 13) are incorporated into the door frame (1), and each sliding door is provided with a fulcrum selected from a fixed fulcrum (16), a free fulcrum (17) and a movable fulcrum (18), and a long link. A sliding door using a link-type opening / closing mechanism configured to connect between each fulcrum by using either (31) or the short link (32) alone or in combination, and to move the entire sliding door in the same direction when an arbitrary sliding door moves. Fixed sliding supports (16) are provided on all five sliding doors whose central sliding doors (11) are approximately double the width of the left, right middle and end sliding doors (12, 13), and long links (31) and short links (32). Is connected to any fixed fulcrum, alone or in combination, and the center of the long link and the other end and the center of the long link and the other end of the short link are connected to form a free fulcrum (17). The sliding door using the link-type opening / closing mechanism according to claim 1, wherein, when moved, the left / right middle / end sliding door faces the center sliding door, and the whole also moves in the same direction. The central sliding door (11) is provided with one of a fixed fulcrum (16) and a movable fulcrum (18) for each of the five sliding doors whose width is about twice as wide as the left, right, middle and end sliding doors (12, 13). The two long links (31) are placed on the left and right sides of the center to connect the fulcrum, and both long links are connected and shared with the fulcrum of the central sliding door. The sliding door using the link-type opening / closing mechanism according to claim 1, wherein the whole is configured to move in the same direction while facing the central sliding door. Either a fixed fulcrum (16) or a movable fulcrum (18) is provided for each of the three sliding doors (12, 13), and each fulcrum is connected by one long link (31), and an arbitrary sliding door is moved. A sliding door using the link-type opening / closing mechanism according to claim 1, wherein the whole is configured to move in the same direction. A fixed fulcrum (16) is provided at the sliding doors at both ends of the three sliding doors (12, 13), and a movable fulcrum (18) is provided at the middle sliding door. One end of the two short links (32) is connected to the fixed fulcrum at the sliding doors at the other end. The sliding door according to claim 1, wherein an end is connected and shared with a movable fulcrum, and when an arbitrary sliding door moves, the entire sliding door moves in the same direction. At least three sliding doors (11, 12, 13) are placed on one side and stacked, and integrated with a part of the upper frame (2) that incorporates a guide device for the sliding door, to be regarded as a door, and between the door frame and the door. A sliding door using the link-type opening / closing mechanism according to any one of claims 1 to 5, wherein the rotating means (45) provided rotates the door from the frame end and pushes the door out of the frame. A sliding door using a link-type opening / closing mechanism according to any one of claims 1 to 6, wherein at least three sliding doors (11, 12, 13) incorporate a restraining means (38) for keeping a gap between the sliding doors constant.

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