Opening and closing device

Abstract

To provide an opening and closing device capable of reducing a likelihood that an opening and closing body comes off a guide rail.SOLUTION: An opening and closing device 1 includes an opening and closing body 11 that opens and closes in a vertical direction, locking members 111 having locking portions 1112 and provided at both ends of the opening and closing body 11, a guide rail 12 that guides an opening and closing operation of the opening and closing body 11, an engagement portion 131 that protrudes in a depth direction inside the guide rail 12 such that it engages with the locking portions 1112 and prevents the locking members 111 from coming off an opening 121 of the guide rail 12, and a side portion 123 that has the engagement portion 131 and extends in a width direction, the opening and closing device including an engagement portion displacement reduction mechanism that, when the guide rail 12 deforms such that the opening 121 widens in the depth direction, increases a space between an inner surface of the guide rail 12 and an outer surface of the side portion 123 at a position where the engagement portion 131 is formed, thereby reducing displacement of the engagement portion 131 in a deformation direction of the guide rail 12.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to an opening and closing device having an opening and closing body that opens and closes in the vertical direction and a guide rail that guides the vertical movement of the opening and closing body. [Background technology]

[0002] In recent years, due to the effects of global warming and other factors, there has been a tendency for typhoons and other storms to become larger and stronger, and there have been cases where flying debris from typhoons and tornadoes has collided with houses. Patent Documents 1 and 2 disclose techniques for protecting windows from wind pressure caused by typhoons and the resulting collision of flying objects. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 6924339 [Patent Document 2] Patent No. 7175444 Summary of the Invention [Problem to be solved by the invention]

[0004] An opening and closing device having an opening and closing body such as a shutter that opens and closes in the vertical direction is also a device that protects windows and the like from wind pressure from typhoons and other causes, or negative pressure caused by the wind, and from the collision of flying objects caused by these. However, when a large external force based on wind pressure, the collision of flying objects, or negative pressure caused by the wind is applied to the opening and closing body (such as a shutter curtain), the opening and closing body bends, and as a result, the guide rails that guide the opening and closing body on both sides also deform, and the opening and closing body may come off the guide rails.

[0005] In view of the above, the present invention aims to provide an opening and closing device having an opening and closing body that opens and closes in the vertical direction and a guide rail that guides the vertical movement of the opening and closing body, which is capable of reducing the likelihood of the opening and closing body coming off the guide rail. [Means for solving the problem]

[0006] (Configuration 1) an opening / closing device comprising: an opening / closing body that opens and closes in the vertical direction; locking members provided on both sides of the opening / closing body in the width direction, the locking members having locking portions that are formed so that a portion of the depth dimension, which is perpendicular to the vertical and width directions in a horizontal cross section, is larger; guide rails that guide the opening and closing operation of the opening / closing body on both sides of the opening / closing body in the width direction, the guide rails having an opening on an inner side to receive the opening / closing body; and a reinforcing member arranged within the guide rail, the reinforcing member having an engaging portion that protrudes in the depth direction inside the guide rail so as to engage with the engaging portion to prevent the locking member from slipping out of the opening, and a side portion that has the engaging portion and extends in the width direction; and an engaging portion displacement reduction mechanism that, when the guide rail deforms so as to widen the opening in the depth direction, increases the space between the inner surface of the guide rail and the outer surface of the side portion at the position where the engaging portion is formed, thereby reducing displacement of the engaging portion in the deformation direction of the guide rail.

[0007] (Configuration 2) The opening and closing device described in configuration 1, wherein the engagement portion displacement reduction mechanism has a fulcrum member provided between the side portion and the guide rail, between the position where the engagement portion is formed and the position where a force caused by deformation of the guide rail is applied to the side portion when the guide rail is deformed.

[0008] (Configuration 3) The opening and closing device according to configuration 2, wherein the fulcrum member is a protrusion formed on the outer surface of the side portion or a protrusion formed on the inner surface of the guide rail.

[0009] (Configuration 4) An opening and closing device as described in any one of configurations 1 to 3, wherein the engagement portion displacement reduction mechanism has a low-rigidity portion formed in the guide rail between the position where the engagement portion is formed and the position where a force accompanying deformation of the guide rail is applied to the side portion when the guide rail is deformed, so that the guide rail is more likely to bend in the depth direction at the low-rigidity portion than at a location that is widthwise outer than the position where the low-rigidity portion of the guide rail is formed.

[0010] (Configuration 5) 5. The opening and closing device according to configuration 4, wherein the low rigidity portion is formed by reducing the section modulus of a portion of the guide rail.

[0011] (Configuration 6) 6. The opening and closing device according to any one of configurations 1 to 5, wherein the reinforcing member having the engaging portion and the side portion is integrally formed by bending a plate material.

[0012] (Configuration 7) The guide rail includes the opening, an indoor side surface of the guide rail, an outdoor side surface of the guide rail, and an outer side surface of the guide rail in the width direction, The reinforcing member includes an indoor side surface and an outdoor side surface that are the side portions, an outer side surface in the width direction of the reinforcing member, the engaging portion protruding on the inner side of the indoor side surface of the reinforcing member, and the engaging portion protruding on the inner side of the outdoor side surface of the reinforcing member, An opening and closing device as described in any one of configurations 1 to 6, wherein the engagement portion displacement reduction mechanism is configured on the outdoor side of the guide rail or the outdoor side of the reinforcing member, or the engagement portion displacement reduction mechanism is configured on the indoor side of the guide rail or the indoor side of the reinforcing member. [Effects of the Invention]

[0013] According to the present invention, in an opening / closing device having an opening / closing body that opens and closes in the vertical direction and a guide rail that guides the up and down movement of the opening / closing body, it is possible to reduce the likelihood of the opening / closing body coming off the guide rail. [Brief explanation of the drawings]

[0014] [Figure 1] FIG. 1 is a diagram showing an opening / closing device (shutter device) according to a first embodiment of the present invention; [Figure 2] 1 is a diagram showing a guide rail and a reinforcing member of an opening and closing device according to a first embodiment; [Figure 3] Schematic diagram for explaining the operation (action according to the present invention) when the guide rail of the opening and closing device of the first embodiment is deformed. [Figure 4] FIG. 10 is a diagram showing another example of an engagement portion provided on a reinforcing member; [Figure 5] 10 is a schematic diagram illustrating the operation of the guide rail of the opening and closing device of the second embodiment when the guide rail is deformed (the operation according to the present invention); [Figure 6] FIG. 10 is a diagram showing another example of a low-rigidity portion provided on a guide rail; [Figure 7] Schematic diagram illustrating the operation of a conventional opening and closing device when a guide rail is deformed. DETAILED DESCRIPTION OF THE INVENTION

[0015] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Note that the following embodiments are merely examples of how the present invention can be realized, and are not intended to limit the scope of the present invention.

[0016] <Embodiment 1> FIG. 1 is a horizontal cross-sectional view showing an outline of an opening and closing device (shutter device) 1 of this embodiment. In the following, the opening and closing direction of the shutter curtain (opening and closing body) 11 (the direction perpendicular to the paper surface in Figure 1) will be referred to as the up-down direction, the width direction of the shutter curtain 11 (the left-right direction in Figure 1) will be referred to as the width direction, and the up-down direction and the direction perpendicular to the width direction (the up-down direction in Figure 1) will be referred to as the depth direction. The shutter device 1 of this embodiment is A shutter curtain 11 that is an opening and closing body that opens and closes in the vertical direction; guide rails 12 on both sides of the shutter curtain 11 in the width direction to guide the opening and closing operation of the shutter curtain 11; a reinforcing member 13 disposed within the guide rail 12 as a member for reinforcing the guide rail 12; a mounting member 14 for mounting the guide rail 12 on a wall surface W; It is equipped with: Although not shown, the opening and closing device 1 also has a shutter case located at the top of the device and a shutter curtain winding mechanism housed inside the shutter case. Any configuration used in an opening and closing device can be used for these (for example, any configuration can be used, including manual and automatic), so a description of these will be omitted here.

[0017] The shutter curtain 11 is made up of multiple slats extending in the width direction. The shutter curtain is made up of multiple slats connected together, which is the same as conventional shutter curtains, so detailed explanations of the slats and other components will be omitted here. A plurality of locking members 111 are provided on both sides of the shutter curtain 11 in the width direction, spaced apart in the vertical direction. The locking member 111 has a shaft portion 1111 connected to the slat, and a locking portion 1112 configured by partially forming the depth dimension larger than that of the shaft portion 1111. Note that the locking portion 1112 in this embodiment is a circular member in side view (shape when viewed from the width direction).

[0018] 2(a) is a horizontal cross-sectional view showing the guide rail 12. Note that, although only one side of the opening and closing device will be shown and explained below, the other side has the same configuration (a symmetrical configuration). The guide rail 12 has an opening 121 formed on the inner side surface to receive the widthwise end of the shutter curtain (opening / closing body) 11, an inner side surface 122 of the guide rail, an outdoor side surface 123 of the guide rail, and an outer side surface 124 of the guide rail in the widthwise direction, which has a cross-sectional shape that is approximately U-shaped. On both sides of the opening 121 in the depth direction, there are provided mohair holders 125 and 126 to which mohair M is attached for preventing the intrusion of dust and the like. The guide rail 12 of this embodiment is structured so that the tip (inner side in the width direction) of the reinforcing member outdoor side 133 (see Figure 2(b)) of the reinforcing member 13 is clamped and held between the mohair holding portion 126 and the guide rail outdoor side 123. On the other hand, the distance between the mohair holding portion 125 and the indoor side surface 122 of the guide rail is wider than the distance between the mohair holding portion 126 and the outdoor side surface 123 of the guide rail, and is configured to allow (accept) movement of the indoor side surface 132 of the reinforcing member 13, which functions as an engagement portion displacement reduction mechanism described below. The mohair holding portion 125 of this embodiment functions as "a member that transmits the force accompanying the deformation to the side portion 132 when the guide rail 12 is deformed so that the opening 121 widens in the depth direction." In other words, the mohair holding portion 125 defines "the position where the force accompanying the deformation is applied to the side portion when the guide rail is deformed." 1, the guide rail 12 has an attachment structure for attachment member 14 for attachment to wall surface W, in which an outdoor side surface 123 of the guide rail extends outward in the width direction, and an outer side surface 124 of the guide rail extends toward the indoor side. Any attachment structure for attachment to wall surface W can be selected, so detailed explanation of these will be omitted.

[0019] FIG. 2( b ) is a horizontal cross-sectional view showing the reinforcing member 13 . The reinforcing member 13 has an engaging portion 131 that protrudes in the depth direction inside the guide rail 12 so as to engage with the engaging portions 1112 at both ends of the shutter curtain 11 and prevent the engaging portions 1112 from slipping out of the opening 121 (i.e., prevent the shutter curtain 11 from slipping out of the guide rail 12), an indoor side surface (side portion) 132 of the reinforcing member, an outdoor side surface 133 of the reinforcing member, and a widthwise outer side surface 134 of the reinforcing member. In this embodiment, the engagement portion 131 is configured to protrude from both the indoor side surface 132 of the reinforcing member and the outdoor side surface 133 of the reinforcing member toward the inner side of the side surface, and the distance between the two engagement portions 131 is configured to be wider than the shaft portion 1111 of the shutter curtain 11 and narrower than the locking portion 1112. The reinforcing member 13 includes a protrusion 15, which is a fulcrum member formed on the outer surface of the reinforcing member's indoor side surface (side portion) 132. The protrusion 15 is a fulcrum member provided between position P1 (see FIG. 3(a)) where the engagement portion 131 is formed and position P2 (position where the mohair holding portion 125 and the reinforcing member's indoor side surface (side portion) 132 contact each other) where a force caused by deformation of the guide rail is applied to the side surface when the guide rail is deformed. The protrusion 15 is provided between the reinforcing member's indoor side surface (side portion) 132 and the guide rail 12. As shown in FIG. 3(a) , a gap exists between the reinforcing member's indoor side surface 132 and the inner surface of the guide rail 12 on the widthwise inner side of the protrusion 15 (the right side in FIG. 3(a) ). This allows the reinforcing member's indoor side surface 132 to tilt like a seesaw, with the protrusion 15 as a fulcrum (which lifts position P1, which is located on the opposite side of the protrusion 15, relative to position P2). These components constitute an "engagement portion displacement reduction mechanism." As can be seen from Figure 2(b) etc., the reinforcing member 13 of this embodiment is formed by bending a plate material, and the engagement portion 131, the indoor side surface 132 of the reinforcing member, the outdoor side surface 133 of the reinforcing member, the widthwise outer side surface 134 of the reinforcing member, and the protrusion 15 are integrally formed. Since the reinforcing member 13 is formed by bending a plate material, the bending process is inevitably performed at the base portion of the engaging portion 131. As a result, in functioning as an engaging portion displacement reduction mechanism (see FIG. 3(b)), the engaging portion 131 tends to bend more easily at the base portion (position P1), and it is expected that the position of the engaging portion 131 will be more easily maintained (stabilized).

[0020] Fig. 3 is a schematic diagram illustrating the operation of the guide rail 12 of the opening and closing device 1 of this embodiment when it is deformed (the action according to the present invention). On the other hand, Fig. 7 is a schematic diagram illustrating the operation of the guide rail of a conventional opening and closing device when it is deformed. Both figures are conceptual explanatory diagrams showing a state in which the shutter curtain is bent toward the indoor side due to an external force, such as when a flying object hits the shutter curtain.

[0021] The conventional opening and closing device shown in Figure 7 has a shutter curtain 11, a guide rail 120, and a reinforcing member 130 arranged within the guide rail 120 (the same symbols are used for configurations that are conceptually similar to the opening and closing device 1 of this embodiment). In the conventional opening and closing device shown in Figure 7, the guide rail 120 and the reinforcing member 130 that reinforces it are assembled so that they fit together, and when the shutter curtain 11 bends toward the indoor side and the guide rail 120 deforms so that the opening widens in the depth direction (toward the room), as shown in Figure 7(b), the indoor side (lower side in the figure) of the guide rail 120 and the reinforcing member 130 rotate together toward the room, with the fulcrum near the joint point P3 with the outer side in the width direction. As a result, the indoor-side engaging portion 1311 also moves downward and rotates, increasing the distance between it and the outdoor-side engaging portion 1311. Because the shutter curtain 11 is bent by an external force, an inward force (a force that acts to pull the shutter curtain out of the guide rail) is applied to the shutter curtain 11, which, combined with the increased distance between the engaging portions 1311, makes it easier for the shutter curtain 11 to come out of the guide rail 120.

[0022] On the other hand, in the opening / closing device 1 of this embodiment, when the shutter curtain 11 bends toward the indoor side and the guide rail 12 deforms so that the opening 121 widens in the depth direction (toward the interior of the room), as shown in FIG. 3 , the mohair holding portion 125 acts to push position P2, which is located on the indoor side surface (side surface portion) 132 of the reinforcing member inward in the width direction (to the right in the figure) relative to the protrusion (fulcrum member) 15, toward the indoor side. This causes position P1, which is located on the opposite side of the protrusion 15 from position P2, to be relatively lifted. Therefore, as shown in FIG. 3( b), the guide rail 12 rotates around the fulcrum near P3, but the rotation of the indoor-side engaging portion 131 of the reinforcing member 13 around the fulcrum near P3 is suppressed, which acts to reduce displacement of the indoor-side engaging portion 131 toward the indoor side (downward in the figure) and reduces an increase in the gap between the indoor-side engaging portion 131 and the outdoor-side engaging portion 131. This makes it possible to reduce the likelihood of the shutter curtain 11 coming off the guide rail 12. In other words, the above action functions as an engagement portion displacement reduction mechanism that "when the guide rail 12 is deformed so that the opening 121 of the guide rail 12 widens in the depth direction, it increases the space S between the inner surface of the guide rail 12 and the outer surface of the indoor side surface (side surface) 132 of the reinforcing member at the position where the engagement portion 131 is formed, thereby reducing the displacement of the engagement portion 131 in the deformation direction of the guide rail 12."

[0023] As described above, according to the opening and closing device 1 of this embodiment, in an opening and closing device having an opening and closing body that opens and closes in the vertical direction and a guide rail that guides the vertical movement of the opening and closing body, it is possible to reduce the likelihood of the opening and closing body coming off the guide rail.

[0024] In this embodiment, the protrusion 15 is configured in the shape shown in Fig. 4(a), but the present invention is not limited to this, and the protrusion may be formed in any shape that can function as a fulcrum member as understood from the above explanation. Figs. 4(b) to 4(d) show examples of variations in the shape of the protrusion 15 (examples of protrusions formed integrally with reinforcing members by bending a plate-like member).

[0025] In this embodiment, the reinforcing member 13 is formed by bending a plate material, and the engaging portion 131, the indoor side surface 132 of the reinforcing member, the outdoor side surface 133 of the reinforcing member, the widthwise outer side surface 134 of the reinforcing member, and the protrusion 15 are formed integrally as an example, but the present invention is not limited to this, and any of the members may be formed separately, etc. For example, the protrusion 15 serving as the fulcrum member may be formed on the inner surface side of the guide rail, or the protrusion 15 may be formed separately from both the reinforcing member and the guide rail.

[0026] <Embodiment 2> Fig. 5(a) is a schematic horizontal cross-sectional view showing the part of the opening and closing device according to the present invention of the second embodiment (an explanatory diagram showing only one side of the opening and closing device, as in the first embodiment), and Fig. 5(b) is a schematic diagram explaining the operation (action according to the present invention) of the guide rail 12 of the opening and closing device according to the second embodiment when it is deformed. Note that the same reference numerals are used for parts that are conceptually similar to those of the first embodiment, and the explanation here will be simplified or omitted.

[0027] The opening and closing device 1' of this embodiment is formed by having an engagement portion displacement reduction mechanism which "has a low rigidity portion 16 formed in the guide rail 12' between position P1 where the engagement portion 131 is formed and position P2 where, when the guide rail is deformed, the force associated with that deformation is applied to the indoor side surface (side surface) 132' of the reinforcing member, so that the guide rail 12' is configured to bend more easily in the depth direction at the low rigidity portion 16 than at a location which is widthwise outer (left side in the figure) than the position where the low rigidity portion 16 of the guide rail 12' is formed." The low rigidity portion 16 in this embodiment is constituted by a notch formed on the inner surface of the guide rail 12', and is "formed by reducing the cross-sectional modulus of a portion of the guide rail."

[0028] As shown in Figure 5, when the shutter curtain 11 bends toward the indoor side and the guide rail 12' is deformed so that the opening 121 widens in the depth direction (toward the interior of the room), the mohair holding portion 125 acts to press position P2 on the indoor side surface (side portion) 132' of the reinforcing member, which is widthwise inward (to the right in the figure) of the low rigidity portion 16. At this time, since the guide rail 12' has the low rigidity portion 16, the guide rail 12' bends at the low rigidity portion 16, but the bending of the guide rail 12 is kept small on the widthwise outer side of the low rigidity portion 16 (on the left side in the figure). As a result, as can be seen from Figure 5(b), the position P1 of the reinforcing member 13' is relatively raised, which prevents the gap between the indoor and outdoor engaging portions 131 from increasing, and reduces the likelihood of the shutter curtain 11 coming off the guide rail 12'. In other words, the above action functions as an engagement portion displacement reduction mechanism that "when the guide rail 12' is deformed so that the opening 121 of the guide rail 12' widens in the depth direction, the space S between the inner surface of the guide rail 12' and the outer surface of the indoor side surface (side surface portion) 132' of the reinforcing member at the position where the engagement portion 131 is formed is increased, thereby reducing the displacement of the engagement portion 131 in the deformation direction of the guide rail 12'."

[0029] As described above, according to the opening and closing device 1' of this embodiment, as in embodiment 1, in an opening and closing device having an opening and closing body that opens and closes in the vertical direction and a guide rail that guides the vertical movement of the opening and closing body, it is possible to reduce the likelihood of the opening and closing body coming off the guide rail.

[0030] In this embodiment, the low-rigidity portion 16 is formed by a notch formed on the inner surface of the guide rail 12', but the present invention is not limited to this. For example, as shown in Fig. 6(a), the low-rigidity portion 16 may be formed by a notch formed on the outer surface of the guide rail. Furthermore, the low-rigidity portion is not limited to being formed locally. For example, as shown in Fig. 6(b), the low-rigidity portion 16 may be formed so that the rigidity is lower in a certain range than in the outer side in the width direction (the left side in the figure). Furthermore, the low-rigidity portion is not limited to being formed by reducing the section modulus (by changing the shape), but may be formed by, for example, changing a part of the material. In addition, the low rigidity portion may be configured on the indoor side of the guide rail "between the position where the engagement portion is formed and the position where the force associated with deformation of the guide rail is applied to the indoor side (side portion) of the reinforcing member when the guide rail is deformed" so that the indoor side of the guide rail is more likely to bend in the depth direction than the area further outward in the width direction; for example, it may be configured so that the "outside in the width direction" portion has high rigidity, thereby making it relatively low rigidity (even if the "outside in the width direction" portion has high rigidity and the "low rigidity portion" has the same rigidity as other parts of the guide rail, it is still a "low rigidity portion").

[0031] In each embodiment, an example is shown in which the engagement portion displacement reduction mechanism is formed on the indoor side (the engagement portion displacement reduction mechanism is configured on the indoor side of the guide rail or the indoor side of the reinforcing member), but the present invention is not limited to this, and the engagement portion displacement reduction mechanism may be formed on the outdoor side (the engagement portion displacement reduction mechanism is configured on the outdoor side of the guide rail or the outdoor side of the reinforcing member) (it may also be a structure symmetrical in the depth direction (top and bottom in the figure) to that described in each embodiment). This makes it possible to reduce the likelihood of the shutter curtain coming off the guide rail when the shutter curtain is bent outdoors due to negative pressure caused by wind, etc. Of course, the engaging portion displacement reduction mechanism may be provided on both the indoor side and the outdoor side.

[0032] Furthermore, in the first embodiment, the engagement portion displacement reduction mechanism is configured using a fulcrum member, and in the second embodiment, the engagement portion displacement reduction mechanism is configured using a low rigidity portion, but these are not limited to being used separately, and it is also possible to use both the fulcrum member and the low rigidity portion, etc.

[0033] In each embodiment, the mohair holding portion 125 functions as "a member that transmits the force associated with deformation to the side portion 132 when the guide rail 12 is deformed so that the opening 121 widens in the depth direction," that is, the mohair holding portion 125 defines "the position where the force associated with deformation is applied to the side portion when the guide rail is deformed," but the present invention is not limited to this, and the mohair holding portion may be a member separate from the mohair holding portion that constitutes "a member that transmits the force associated with deformation to the side portion when the guide rail is deformed so that the opening widens in the depth direction." As can be understood from the explanation of each of the above embodiments, the "member that transmits the force associated with the deformation of the guide rail to the side portion when the guide rail is deformed so that the opening widens in the depth direction" may be configured to transmit the force associated with the deformation of the guide rail when the opening widens in the depth direction (a force that may ultimately act to widen the gap between the engaging portions of the reinforcing member) to the side portion at a position that is more inward in the width direction than the fulcrum member or the low rigidity portion.

[0034] In each embodiment, the example is one in which the locking portion 1112 is T-shaped in horizontal cross section and the engaging portion 131 is provided on both the outdoor side and the indoor side, but the present invention is not limited to this, and it is also possible, for example, for the locking portion 1112 to be L-shaped in horizontal cross section and the engaging portion 131 to be provided only on either the outdoor side or the indoor side (the locking portion may be one in which "the depth dimension in horizontal cross section is formed larger in part," and the engaging portion may be one in which "the engaging portion protrudes in the depth direction inside the guide rail so as to engage with the locking portion and prevent the locking member (shutter curtain) from slipping out of the opening (guide rail)").

[0035] In each embodiment, a shutter device is used as an example of an opening and closing device, but the present invention is not limited to this, and the concept of the present invention as understood from the above explanation can be applied to an opening and closing device having an opening and closing body that opens and closes in the vertical direction and a guide rail that guides the vertical movement of the opening and closing body. [Explanation of symbols]

[0036] 1...Shutter device (opening and closing device) 11...Shutter curtain (opening and closing body) 111...Locking member 1112...Latching part 12... Guide rail 121...Aperture 122...Inside of the guide rail 123...Outdoor side of guide rail 124...Outer side of guide rail width direction 13...Reinforcing member 131...Engagement part 132... Reinforcement member interior side (side part) 133...Reinforcing member exterior side (side part) 134...Outside side surface in the width direction of the reinforcing member 15...Protrusion (supporting part) 16...Low rigidity part

Claims

1. An opening / closing body that opens and closes in the vertical direction; a locking member provided on each side in the width direction of the opening / closing body, the locking member having a locking portion formed so that a dimension in a depth direction perpendicular to the up-down direction and the width direction is partially larger in a horizontal cross-sectional view; guide rails on both sides of the opening / closing body in the width direction to guide the opening / closing operation of the opening / closing body, the guide rails having an opening on an inner side surface to receive the opening / closing body; A reinforcing member disposed within the guide rail, an engaging portion that protrudes in a depth direction inside the guide rail so as to engage with the engaging portion to prevent the engaging member from slipping out of the opening; a side surface portion having the engaging portion and extending in the width direction; a reinforcing member having Equipped with An opening and closing device comprising an engagement portion displacement reduction mechanism that reduces displacement of the engagement portion in the deformation direction of the guide rail by increasing the space between the inner surface of the guide rail and the outer surface of the side portion at the position where the engagement portion is formed when the guide rail is deformed so that the opening widens in the depth direction.

2. 2. The opening and closing device according to claim 1, wherein the engagement portion displacement reduction mechanism has a fulcrum member provided between the side portion and the guide rail, between the position where the engagement portion is formed and the position where a force accompanying deformation of the guide rail is applied to the side portion when the guide rail is deformed.

3. The opening and closing device according to claim 2 , wherein the fulcrum member is a protrusion formed on an outer surface of the side portion or a protrusion formed on an inner surface of the guide rail.

4. 2. The opening and closing device of claim 1, wherein the engagement portion displacement reduction mechanism has a low-rigidity portion formed in the guide rail between the position where the engagement portion is formed and the position where a force accompanying deformation of the guide rail is applied to the side portion when the guide rail is deformed, so that the guide rail is more likely to bend in the depth direction at the low-rigidity portion than at a location that is widthwise outside the position where the low-rigidity portion of the guide rail is formed.

5. The opening and closing device according to claim 4 , wherein the low-rigidity portion is formed by reducing the section modulus of a portion of the guide rail.

6. The opening and closing device according to claim 1 , wherein the reinforcing member having the engaging portion and the side surface portion is integrally formed by bending a plate material.

7. The guide rail includes the opening, an indoor side surface of the guide rail, an outdoor side surface of the guide rail, and an outer side surface of the guide rail in the width direction, The reinforcing member includes an indoor side surface and an outdoor side surface that are the side portions, an outer side surface in the width direction of the reinforcing member, the engaging portion protruding on the inner side of the indoor side surface of the reinforcing member, and the engaging portion protruding on the inner side of the outdoor side surface of the reinforcing member, 6. An opening and closing device as described in any one of claims 1 to 5, wherein the engagement portion displacement reduction mechanism is configured on the outdoor side of the guide rail or the outdoor side of the reinforcing member, or the engagement portion displacement reduction mechanism is configured on the indoor side of the guide rail or the indoor side of the reinforcing member.

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