Sliding door device

Abstract

The sliding door can be opened from inside the storage area even when the locking mechanism is locked. [Solution] A sliding door device for opening and closing a storage compartment includes a sliding door 10 that can be opened by moving it laterally relative to a stationary point, and a locking device 60 that locks the closed sliding door 10 to the relative stationary point, wherein the locking device 60 is configured to lock a locking part 61a to a locked part 62 when the sliding door 10 is closed, with one of the locking part 61a and the locked part 62 being provided on the relative stationary point, and the other being provided so as to be detachable from the sliding door 10 by operation from inside the storage compartment.

Description

Technical Field

[0001] The present invention relates to a sliding door device configured to open and close an opening of a storage compartment by moving a sliding door in a lateral direction.

Background Art

[0002] Some refrigerators and freezers with temperature-controlled internal spaces are equipped with a heat insulating door that opens and closes in a sliding door manner, an opening frame that is opened and closed by the heat insulating door, an elastic airtight member that hermetically seals the gap between the heat insulating door and the opening frame, and a locking device that locks the heat insulating door from the outside of the storage compartment for crime prevention and other purposes. Patent Document 1 shows an example of related prior art.

Prior Art Literature

Patent Document

[0003]

Patent Document 1

Summary of the Invention

Problem to be Solved by the Invention

[0004] Incidentally, in large-scale refrigerators and freezers that store a large amount of articles such as food, a person may open the heat insulating door to enter the inside of the storage compartment for transporting the articles. However, there is a risk that a person outside the storage compartment may close the heat insulating door and operate the locking device to lock it without noticing that a person has entered the inside of the storage compartment.

Means for Solving the Problem

[0005] In view of such problems, one aspect of the present invention has the following configuration. A sliding door device for opening and closing a storage compartment, comprising a sliding door that can be opened by lateral movement relative to a stationary point, and a locking device for locking the closed sliding door to the relative stationary point, wherein the locking device is configured to lock a locking portion to a locked portion when the sliding door is closed, and one of the locking portion and the locked portion is provided on the relative stationary point, and the other is provided so as to be separable from the sliding door by operation from inside the storage compartment. [Effects of the Invention]

[0006] As described above, the present invention is configured such that the sliding door can be opened from inside the storage area even when the locking device is locked. [Brief explanation of the drawing]

[0007] [Figure 1] This is a front view showing an example of a sliding door device according to the present invention. [Figure 2] This is a disassembled perspective view of the sliding door device. [Figure 3] This is a cross-sectional view along the line (III)-(III) in Figure 1. [Figure 4] This is a cross-sectional view along the line (IV)-(IV) in Figure 1. [Figure 5] This is a cross-sectional view of the main part of the sliding door device. [Figure 6] Figures (a) and (b) sequentially show vertical cross-sectional views of the rail members being fitted into the opening frame. [Figure 7] This is a vertical cross-sectional view of the main part showing the lower end portion of a sliding door (insulated door). [Figure 8] In the sliding door device, (a) is a front view showing the locking device in the locked state, and (b) is a cross-sectional view of the main part showing the locking device in the locked state. [Figure 9] In the sliding door device, (a) is a front view showing the locked portion separated, and (b) is a cross-sectional view of the main part showing the locked portion separated. [Figure 10] This is a front view showing another example (double sliding door) of the sliding door device according to the present invention. [Figure 11] Figure 10 is a cross-sectional view of the main part. [Figure 12] In another example of the same sliding door device, (a) is a front view showing the locking device in the locked state, and (b) is a cross-sectional view of the main part showing the locking device in the locked state. [Figure 13] In another example of the same sliding door device, (a) is a front view showing the locked portion separated, and (b) is a cross-sectional view of the main part showing the locked portion separated. [Modes for carrying out the invention]

[0008] Next, embodiments of the present invention will be described in detail with reference to the drawings. <First Embodiment (Single Sliding Door)> Figures 1 to 9 show a sliding door device A, which is a first embodiment of the present invention. This sliding door device A is installed to open and close an opening X in the wall of a storage facility (for example, a refrigerated warehouse, a frozen warehouse, etc.) where the internal space is temperature-controlled (see Figures 3 and 5). In the following explanation, "inside of the storage unit" refers to the interior side of the storage unit, and "outside of the storage unit" refers to the exterior side of the storage unit.

[0009] This sliding door device A comprises a sliding door 10 (insulated door) that can be opened by moving laterally relative to a stationary part (an opening frame 20 as shown in the example in Figure 1), an opening frame 20 that is opened and closed by the sliding door 10, a cover piece 30 that protrudes from the opening frame 20 toward the inside of the storage area, a transom 40 that suspends the sliding door 10 from above and moves it in the opening and closing direction, a swing prevention part 50 that prevents the sliding door 10 from swinging in the thickness direction during opening and closing operations, and a locking device 60 that locks the closed sliding door 10 to the stationary part (opening frame 20), thus constituting a single-sliding type suspended sliding door device for opening and closing the opening of a storage area.

[0010] The sliding door 10 includes a door main body 10a which is a rectangular plate-like member in front view with a hollow interior, hanging rollers 11 that suspend the door main body 10a on a rail member 41 (see FIG. 3) inside the transom 40, hanging roller support brackets 12 fixed to the door main body 10a so as to rotatably support the hanging rollers 11, and guided portions 13 that fit into a shake prevention portion 50 on the lower stationary surface k2 and are guided in the opening and closing direction.

[0011] Further, this sliding door 10 constitutes a heat-insulating door that does not contain wood inside the door main body 10a, and is provided with a heat-insulating foam 14 filled inside the door main body 10a, sliding contact airtight members 17 protruding from the door main body 10a and in airtight contact with the facing surface k1 of the opening frame 20, the lower stationary surface k2 (for example, a floor surface or a lower frame) and the like, a linear heater (not shown) for preventing dew condensation, a buffer member 19 (see FIG. 5) mounted on the door leading end surface of the sliding door 10, and mounting brackets 16 for mounting the sliding contact airtight members 17, the buffer member 19 and the like to the sliding door 10.

[0012] A plurality of hanging rollers 11 are provided so as to be located at one end side and the other end side in the lateral width direction at the upper end of the sliding door 10. Each hanging roller 11 is a substantially cylindrical rotating body, and has a recessed portion with a substantially semicircular cross-section that fits with a rail-like projection 41a (see FIG. 3) of the rail member 41 over the entire outer peripheral surface thereof. This hanging roller 11 is rotatably supported by the hanging roller support bracket 12 via a bearing, a shaft-like member or the like, and rolls on the rail-like projection 41a.

[0013] The hanging roller support brackets 12 are respectively provided on one end side and the other end side in the lateral width direction on the upper end side of the door main body 10a. Each hanging roller support bracket 12 has a shape in which a substantially L-shaped longitudinal section is continuous in the lateral width direction of the door main body 10a, one substantially horizontal piece portion is fixed to the upper end of the door main body 10a, and one or a plurality of hanging rollers 11 are rotatably supported on the other substantially vertical piece portion.

[0014] The guided portion 13 is provided on the lower end side of the outer surface of the door main body 10a on the outside of the storage compartment. The guided portion 13 has a groove portion 13a with a substantially inverted concave vertical cross-section that is continuous in the lateral direction, and a cover portion 13b that covers the groove portion 13a from above and is continuous in the lateral direction. In the illustrated example, the outer surface is the surface (external side) of the door body 10a when viewed from outside the storage compartment. In another example, this outer surface can be the back surface (internal side) of the door body 10a, a guided portion 13 can be provided on this back surface, and a sway prevention portion 50 can be positioned corresponding to this guided portion 13.

[0015] The cover portion 13b is formed in the shape of an inclined plate that slopes downward as it moves away from the door body 10a in the direction of the door thickness, and this inclined surface makes it difficult for dust, dirt, foreign matter, etc. to accumulate.

[0016] The guided portion 13 in the above configuration is made up of a combination of multiple (two in the illustrated example) members, but it can also be made up of a single member.

[0017] Multiple rows (two rows in the illustrated example) of the sliding seal material 17 are provided on the surface of the door body 10a facing the visible surface k1 and the surface facing the lower fixed surface k2, respectively, via mounting brackets 16. These sliding seal materials 17 are integrally joined and continuous.

[0018] Each row of sliding airtight seal 17 is formed of an elastic material (for example, rubber or elastomer resin) and has multiple rows (two rows in the illustrated example) of elastic pieces 17a so as to be pressed against the facing surface k1 or the lower immovable surface k2 of the opening frame 20 and to bend elastically.

[0019] The cushioning member 19 is formed in a hollow shape using an elastic material (for example, rubber or elastomer resin) and is attached to the door edge surface of the sliding door 10 via the mounting bracket 16 (see Figure 5). This cushioning member 19 mitigates the impact when the sliding door 10 comes into contact with an object on the door edge side during the closing operation. This buffer member 19 is a component with the same configuration as the pressure-welded airtight material 19' described later.

[0020] The mounting bracket 16 is formed from a hard metal material (e.g., aluminum alloy) into a long, roughly strip-like shape. A sliding seal 17, a cushioning member 19, and a pressure seal 19' (described later) are selectively attached to this mounting bracket 16. A linear heater (not shown) is also fitted to this mounting bracket 16 as needed.

[0021] The opening frame 20 comprises two vertical frames 21 and 22 spaced apart on the left and right sides, and a horizontal frame 23 connecting these vertical frames 21 and 22 at their upper ends, and is configured as a single, inverted concave shape when viewed from the front (see Figures 1 and 2). This opening frame 20 is fixed around the opening X (see Figures 3 and 5) on the outer surface of the wall where the sliding door device A is installed. This opening frame 20 is a relative stationary part that is stationary relative to the sliding door 10 as it opens.

[0022] Each of the vertical frames 21, 22 and horizontal frames 23 is a long, rectangular member made of synthetic resin, containing an insulating material (for example, extruded polystyrene foam) or the like, and has a shape that extends in a long, rectangular direction. A sliding airtight seal 17 is slidably fitted to the visible surface k1 (exterior side surface) of each of the vertical frames 21, 22 and horizontal frames 23.

[0023] The covering piece 30 is composed of left and right vertical covering pieces 31 and 32, and an upper covering piece 33 that extends between the upper ends of these vertical covering pieces 31 and 32 (see Figure 2). Each of the vertical covering pieces 31, 32 and the upper covering piece 33 has a shape in which a roughly L-shaped cross-section is extended in an elongated manner, and is formed by bending a metal sheet material with good corrosion resistance (for example, a stainless steel sheet material) into an L-shaped cross-section. The vertical covering pieces 31 and 32 are inserted into the vertical frames 21 and 22, respectively, and are integrally fitted and secured. The upper covering piece 33 is inserted into the horizontal frame 23 and is integrally fitted and secured. These vertical covering pieces 31, 32 and the upper covering piece 33 cover the visible surface of the wall opening where the sliding door device A is to be installed.

[0024] The transom 40 is fixed to the wall on which the sliding door device A is to be installed, so as to fit into the horizontal frame 23 above the opening path of the sliding door 10. This transom 40 is constructed by suspending the rollers 11 of the sliding door 10 in the opening and closing direction using rail members 41, driving the sliding door 10 to open and close using an electric drive mechanism 42, and covering members 43 that cover these rail members 41 and the electric drive mechanism 42.

[0025] The rail member 41 is a member with a roughly L-shaped vertical cross-section that is continuous in an elongated manner in the door width direction. The rail member 41 is provided with rail-shaped projections 41a that suspend the suspension wheels 11 of the sliding door 10 and guide them to roll in the opening and closing direction, and fitting portions 41b that fit into the horizontal frame 23 of the opening frame 20.

[0026] The rail-shaped projection 41a is a projection that protrudes upward from the horizontal frame 23 at a position away from the outside of the storage compartment, and is continuous in the opening and closing direction of the sliding door 10. The recess on the outer circumference of the suspension wheel 11 fits into this rail-shaped projection 41a.

[0027] The fitting portion 41b is placed on the upper end of the horizontal frame 23 and has an inverted L-shaped vertical cross section that overlaps and contacts the outer surface of the horizontal frame 23, and extends in a long length in the opening and closing direction of the sliding door 10. As shown in Figures 6(a) and 6(b), the fitting portion 41b is superimposed on the horizontal frame 23 of the opening frame 20, which has been previously fixed to a fixed part (such as a wall or column on which the sliding door device A is to be installed), by being placed on it from the outside of the storage area, and is fixed by fasteners (such as screws, rivets, or anchor members) not shown.

[0028] In Figures 1 and 4, reference numeral 44 denotes a spacer that extends in the width direction, with its upper end surface continuous with the horizontal frame 23. The portion of the transom 40's fitting portion 41b that is closer to the door edge than the opening frame 20 is fitted into this spacer 44. This spacer 44 is formed in a rectangular shape with a thickness in the door thickness direction that is approximately the same as that of the horizontal frame 23. This spacer 44 is fixed to the immovable part (for example, a wall or beam) on which the sliding door device A is installed, or to the rail member 41.

[0029] The electric drive mechanism 42 consists of a chain and sprocket that pull the sliding door 10 in the opening and closing direction, an electric motor and control circuit that rotate these, and so on.

[0030] The cover member 43 is configured to be openable for maintenance and other purposes.

[0031] The anti-sway section 50 is configured to include a vertical support shaft 51 fixed to the lower immovable surface k2 near the end of the sliding door 10 when it is fully closed, and a roller 52 supported by this support shaft 51.

[0032] The support shaft 51 is positioned away from the sliding door 10 in the door thickness direction and protrudes upward from the lower fixed surface k2.

[0033] The roller 52 is rotatably mounted on the upper end of the support shaft 51. The groove 13a of the guided portion 13 of the sliding door 10 is fitted into the roller 52 so as to be movable in the door width direction. By fitting the groove 13a of the sliding door 10 into the roller 52, the runout in the thickness direction is suppressed and the door is guided in the opening and closing direction.

[0034] The locking device 60 comprises a locking device 61 provided on the opening frame 20 (relative stationary part), a locking portion 62 provided on the sliding door 10, and a separation operating member 63 that separates the locking portion 62 from the sliding door 10 when operated from inside the storage area. The locking device 60 locks the locking portion 61a to the locked portion 62 when the sliding door 10 is fully closed, and when the separation operating member 63 is operated from the inside of the storage area while the locking device is engaged, it separates the locked portion 62 from the sliding door 10.

[0035] The locking device 61 comprises a rotatable locking portion 61a, a housing 61c that houses the locking portion 61a and is fixed to the vertical frame 21, a keyhole 61d exposed on the front of the housing 61c, and a locking mechanism (a well-known mechanism, not shown) that rotates the locking portion 61a to protrude from the housing 61c by rotating a key (not shown) inserted into the keyhole 61d.

[0036] The tip of the locking portion 61a is formed in a roughly L-shape so that it locks onto the locked portion 62 when rotated in one direction and disengages from the locked portion 62 when rotated in the other direction. This locking portion 61a is sometimes referred to as a hook lock or the like. When the locking mechanism is locked, the locking portion 61a rotates from a position where its roughly L-shaped tip is facing downwards to a position where its tip is facing sideways, and engages with the inner edge of the locking hole 62b1 in the locked portion 62 from below. In this locked state, the locked portion 62 and the locking device 61 (locking portion 61a) cannot separate in the width direction.

[0037] The locking portion 62 comprises a detachable piece 62a that is detachably attached to the door body 10a, and a detachable piece 62b provided on the door edge side of the detachable piece 62a and engaged and disengaged by the locking portion 61a. It is constructed, for example, by appropriately processing a plate-shaped member made of a hard metal such as stainless steel. This locking portion 62 is separated from the sliding door 10 when the separation operating member 63 is loosened from the inside of the storage compartment.

[0038] The detachable piece 62a is formed in a plate shape that overlaps the interior side surface of the door body 10a, and when the separation operating member 63 is removed, it can move along the interior side surface of the door body 10a toward the door edge. The detachable piece 62a is provided with multiple (two in the illustrated example) through holes 62a1 through which the male threaded portions 63a of multiple separation operating members 63 can be inserted.

[0039] The engaging / disengaging piece 62b is a plate-shaped portion that protrudes inward from the door-side end of the engaging portion 62 towards the inside of the storage unit. This engaging / disengaging piece 62b is provided with a rectangular through-hole-shaped engaging / disengaging hole 62b1 that engages with and disengages from the engaging portion 61a. In the illustrated example, the area around the engagement / disengagement hole 62b1 of the engagement / disengagement piece 62b is reinforced by a relatively thick plate-like member or the like. In addition, the end of the engagement / disengagement piece 62b on the interior side is bent toward the door tail side.

[0040] The separation operating member 63 is provided with an annular rotating operating portion 63b, which has an uneven outer surface, integrally attached to the rear end side of the male screw portion 63a. The male threaded portion 63a of this separation operating member 63 is inserted through the through hole 62a1 of the locking portion 62 and screwed into the inner surface of the door body 10a. Furthermore, the inner side surface of the door body 10a is provided with a female screw hole (for example, a female screw hole made of a weld nut, etc.) into which the male screw portion 63a can be screwed.

[0041] <Effects of sliding door device A> With the sliding door device A configured as described above, during the installation of the sliding door device A, the transom 40 can be installed by first setting the opening frame 20 in a fixed position, and then placing and fitting the rail member 41 onto the upper end of the opening frame 20, resulting in good workability.

[0042] Furthermore, since the guided portion 13 and the vibration prevention portion 50 are positioned on the outside of the storage area relative to the sliding door 10, an airtight structure (a multi-layered sliding airtight material 17, as shown in the illustrated example) can be installed on the entire lower end of the sliding door 10, resulting in good airtightness.

[0043] Furthermore, even if the sliding door 10 is closed and the locking device 60 is locked while a person is inside the storage area, the person inside the storage area can loosen and remove the separation operating member 63 and separate the locked portion 62 from the door body 10a, thereby opening the sliding door 10 while the locked portion 62 remains locked to the locking portion 61a (see Figure 9).

[0044] <Second Embodiment> Figures 10 to 13 show a sliding door device B, which is a second embodiment of the present invention. In this sliding door device B, the same reference numerals are used for components that are substantially the same as those in the sliding door device A, and detailed explanations are omitted as appropriate.

[0045] The sliding door device B is a sliding door device of the split type in which two sliding doors 10 are arranged opposite each other to open and close on both sides. Of the two sliding doors 10B, 10B on both sides, one sliding door 10B (the left side in the illustrated example) is designated as a relative stationary part, and a locking part 71 is provided at this relative stationary part, while a locking device 72 is provided at the other sliding door 10B (the right side in the illustrated example).

[0046] More specifically, this sliding door device B comprises one sliding door 10B, another sliding door 10B (insulated door) that can be opened by moving laterally relative to the first sliding door 10B (relative stationary part), an opening frame 20 that is opened and closed by one or both of these sliding doors 10B, 10B, a cover piece 30 that protrudes from the opening frame 20 toward the inside of the storage room, a transom 40 that suspends the sliding door 10B from above and moves it in the opening and closing direction, a swing prevention part 50 that prevents each sliding door 10B from swinging in the thickness direction during opening and closing operations, and a locking device 70 that locks the other sliding door 10B in the closed state to the first sliding door 10B (relative stationary part), thus constituting a sliding-type suspended sliding door device that opens and closes the opening of the storage room.

[0047] The sliding doors 10B, 10B on both sides are installed symmetrically, with their leading edges facing each other. Each sliding door 10A omits the vertical sliding airtight seal 17 on the door edge side of the sliding door device A, and uses a cushioning member 19 attached to the door edge surface of the door body 10a as a pressure-contact airtight seal 19', thus forming an insulated door without wood inside the door body 10a.

[0048] The pressure-welded airtight material 19' is a component with the same configuration as the buffer member 19 described above. When both sliding doors 10B, 10B are fully closed, each pressure-welded airtight material 19' presses against the pressure-welded airtight material 19' of the opposing sliding door 10B, maintaining an airtight seal between the two sliding doors 10B, 10B.

[0049] The opening frame 20 of sliding door device B is wider than that of sliding door device A, so that its opening is covered and opened by two sliding doors 10B, 10B on the left and right.

[0050] The transom 40 is installed above the sliding doors 10B, 10B on both the left and right sides, spanning their opening and closing ranges. This transom 40 is also wider than that of the sliding door device A.

[0051] The anti-sway section 50 is located on the lower and trailing side of each sliding door 10B and is provided to protrude upward from the lower fixed surface k2.

[0052] The locking device 70 comprises a locking portion 71 detachably provided on one sliding door 10B (the left side according to Figure 10), a locking device 72 fixed to the other sliding door 10B, and a separation operating member 63 (see Figure 11) that separates the locking portion 71 from the one sliding door 10B when operated from inside the storage area.

[0053] The locking portion 71 is a box-shaped member that is detachably attached to the door body 10a of one of the sliding doors 10B, and is constructed, for example, by appropriately processing a plate-shaped member made of a hard metal such as stainless steel. A rectangular through-hole shaped engagement / disengagement hole 71a is provided in the wall portion on the door-side of the locked portion 71, which engages with and disengages from the locking portion 72a of the locking device 72.

[0054] The locking device 72, when both sliding doors 10B, 10B are in the fully closed state, locks its locking portion 72a to the locked portion 71, thereby maintaining the fully closed state of both sliding doors 10B, 10B. More specifically, the locking device 72 comprises a locking portion 72a, a housing 72b that rotatably houses the locking portion 72a and is fixed to the outer surface of the other sliding door 10B (on the right side in the illustrated example), a keyhole 72c exposed on the front of the housing 72b, and a locking mechanism (a well-known mechanism, not shown) that rotates the locking portion 72a to protrude from the housing 72b by rotating a key (not shown) inserted into the keyhole 72c.

[0055] The tip of the locking portion 72a is formed in a roughly L-shape so that it locks onto the locked portion 71 when rotated in one direction and disengages from the locked portion 71 when rotated in the other direction. This locking portion 72a is sometimes referred to as a hook lock or the like. When the locking mechanism is locked, the locking portion 72a rotates from a position where its roughly L-shaped tip is facing downwards to a position where its tip is facing sideways, and engages with the inner edge of the locking hole 71a in the locked portion 71 from below. In this locked state, the locked portion 71 and the locking device 72 (locking portion 72a) cannot separate in the lateral direction.

[0056] The separation operating member 63 in sliding door device B is the same member as the separation operating member 63 in sliding door device A, and, as shown in the illustrated example, it is inserted into the door body 10a from the inside of the storage area, corresponding to two locations on the upper and lower ends of the locking portion 71.

[0057] Each separation operating member 63 has its male screw portion 63a pass through one of the door bodies 10a (the left side in the illustrated example) and is screwed into the locking portion 71 (see Figure 12). The locking portion 71 is provided with a female screw hole (for example, a female screw hole using a weld nut, etc.) that can be screwed into the locking portion 71.

[0058] In sliding door device B, the structure for fitting the rail member 41 into the opening frame 20 (horizontal frame 23) (see Figure 6), and the engagement structure between the guided part 13 and the anti-sway part 50 (see Figure 7), etc., are substantially the same as those of sliding door device A described above.

[0059] <Effects of sliding door device B> With the sliding door device B configured as described above, the transom 40 can be easily installed by fitting the rail member 41 into the opening frame 20, similar to the sliding door device A. In addition, the arrangement of the guided portion 13 and the anti-sway portion 50 ensures good airtightness at the lower end of each sliding door 10B.

[0060] Furthermore, even if, by any chance, both sliding doors 10B, 10B are closed and the locking device 70 is locked while a person is inside the storage area, if the person inside the storage area loosens and removes the separation operating member 63 and separates the locking portion 71 from one of the door bodies 10a (the left side in the illustrated example), this separated locking portion 71 will follow the other sliding door 10B (the left side in the illustrated example) (see Figure 13). As a result, both sliding doors 10B, 10B can be opened.

[0061] <Variation> According to the above-described sliding door device A, a locking device 61 equipped with a locking portion 61a is provided on the opening frame 20 (relative stationary portion), and a locked portion 62 is provided on the sliding door 10, and the locked portion 62 can be separated by a separation operating member 63. However, these configurations can also be reversed. In other words, as an example, a locking device 61 equipped with a locking portion 61a may be provided on the sliding door 10, the locked portion 62 may be provided on the opening frame 20 (relative stationary portion), and the locking device 61 may be separated from the inside of the storage compartment by a separation operating member 63.

[0062] In the sliding door device A described above, one vertical frame 21 is designated as a relative stationary point, and this relative stationary point is locked by a locking device 61 (locking part 61a). In the sliding door device B, one sliding door 10B is designated as a relative stationary point, and this relative immovable point is locked by a locking device 72 (locking part 72a). Other examples include the possibility of making parts other than the opening frame 20 and sliding door 10B into relative stationary parts that are locked by a locking device or the like. For example, it is also possible to configure the system such that one of the locking device 61 (or 72) and the locked portion 62 (or 71) is provided on the lower fixed surface k2, and the other is provided so as to be detachable from the sliding door 10 (or 10B) by operation from inside the storage area.

[0063] In the sliding door device B described above, the locking portion 71 is provided on the left sliding door 10B (relative stationary portion), and the locking device 72 (locking portion 72a) is provided on the right sliding door 10B. However, these configurations can also be reversed left and right.

[0064] In the sliding door device B described above, a set of locking devices 70 is provided spanning the left and right sliding doors 10B, 10B. However, in other examples, it is also possible to provide multiple sets of locking devices. In other words, as an example, a locking portion 62 may be provided on the left vertical frame 21 and a locking device 61 (locking portion 61a) may be provided on the left sliding door 10B, and similarly, a locking portion 62 and a locking device 61 (locking portion 61a) may be provided on the right vertical frame 22 and sliding door 10B in a symmetrical manner.

[0065] Furthermore, in sliding door device B, it is possible to provide multiple or multiple types of locking devices for the left or right sliding door 10B. In other words, as an example, in addition to the locking device 70 configured above, one of the sliding doors 10B may be provided with another locking device that engages and disengages with the lower fixed surface k2, which can be detached by operation from inside the storage area.

[0066] Furthermore, the present invention is not limited to the specific configurations described above, and can be modified as appropriate without altering the essence of the invention.

[0067] <Summary> As described above, the above embodiment discloses the following invention. (1) A sliding door device for opening and closing a storage compartment, comprising a sliding door that can be opened by lateral movement relative to a stationary point, and a locking device for locking the closed sliding door to the relative stationary point, wherein the locking device is configured to lock a locking part to a locked part when the sliding door is closed, and one of the locking part and the locked part is provided on the relative stationary point, and the other is provided so as to be separable from the sliding door by operation from inside the storage compartment (see Figures 1 to 13). Furthermore, the term "relative stationary part" refers to the part that is stationary relative to the sliding door that is in the process of opening and closing. Examples of these relative stationary parts include, in a single-sliding door device, the opening frame that remains stationary relative to the sliding door as it opens and closes, the transom, and the lower fixed part. Furthermore, another example of this relative stationary part is the sliding door in a double-sliding door system, where the other sliding door remains stationary relative to the sliding door that is opening and closing. (2) The sliding door device according to (1) (see Figures 1 to 9), characterized in that the relative stationary portion is an opening frame that is opened and closed by the sliding door. (3) A sliding door device of the split type in which the sliding doors are opposed to each other so as to open and close on both sides, wherein one of the sliding doors on both sides is designated as the relative stationary part, and one of the locking part and the locked part is provided on the relative stationary part, and the other is provided so as to be separable from the other sliding door by operation from the inside of the storage area (see Figures 10 to 13). (4) A sliding door device of the hanging type, wherein the sliding door is suspended and opened and closed, wherein the lower fixed surface is provided with a swing prevention part that protrudes upward at a position away from the sliding door in the door thickness direction and prevents the sliding door from swinging in the thickness direction, the lower end of the sliding door is provided with an airtight seal that is in airtight contact with the lower fixed surface, and the outer surface of the sliding door is provided with a guided part that fits into the swing prevention part and is guided in the opening and closing direction, as described in any of (1) to (3) (see Figure 7). (5) A sliding door device of the hanging type, wherein the sliding door is suspended and opened and closed, comprising a rail member that suspends the upper end of the sliding door and guides it in the opening and closing direction, and an opening frame that is opened and closed by the sliding door, wherein the rail member is provided with a fitting portion that fits into the opening frame (see Figure 6). (6) The sliding door device according to (5) (see Figure 6), characterized in that the fitting portion is placed on the upper end of the opening frame and is formed to be in contact with the outer surface of the opening frame.

[0068] Furthermore, the above embodiment also discloses an invention that requires only the following constituent elements. In other words, one aspect of this invention is a suspended sliding door device that opens and closes a sliding door, characterized in that the lower fixed surface is provided with a sway prevention part that protrudes upward at a position away from the sliding door in the door thickness direction and prevents the sliding door from swaying in the thickness direction, an airtight seal is provided at the lower end of the sliding door that is in airtight contact with the lower fixed surface, and a guided part is provided on the outer surface of the sliding door that fits into the sway prevention part and is guided in the opening and closing direction (see Figure 7).

[0069] Another invention is a suspended sliding door device that suspends a sliding door to open and close, comprising a rail member that suspends the upper end of the sliding door and guides it in the opening and closing direction, and an opening frame that is opened and closed by the sliding door, wherein the rail member is provided with a fitting portion that fits into the opening frame (see Figure 6). [Explanation of symbols]

[0070] 13 Guided part 17. Sliding joint airtight material 19' Pressure-welded airtight material 20 Opening frame 23 Horizontal frame 30 cover piece 33 Cover piece 40 No object 41 Rail members 41b Fitting part 50 Anti-vibration section 61a Locking part 62 Locked part 62a Detachable piece 62a1 Through hole 62b Engaged detachment piece 62b1 Detachment hole 63 Separation operating member 71 Locked part 71a Detachment hole 72a Locking part A, B Sliding Door Device

Claims

1. A sliding door device for opening and closing a storage room opening, comprising a sliding door that can be opened by lateral movement relative to a stationary point, and a locking device for locking the sliding door in the closed state to the relative stationary point, The locking device is configured to engage the locking portion with the locked portion when the sliding door is closed. A sliding door device characterized in that one of the locking portion and the locked portion is provided at the relative stationary portion, and the other is provided so as to be separable from the sliding door by operation from the inside of the storage area.

2. The sliding door device according to claim 1, characterized in that the relative stationary portion is an opening frame that is opened and closed by the sliding door.

3. A sliding door device of the split-type, in which the sliding doors are arranged opposite each other so as to open and close on both sides, wherein one of the sliding doors on both sides is designated as the relative stationary part, The sliding door device according to claim 1, characterized in that one of the locking portion and the locked portion is provided at the relative stationary portion, and the other is provided so as to be separable from the other sliding door by operation from the inside of the storage area.

4. A suspended sliding door device that allows the aforementioned sliding door to be opened and closed, The lower fixed surface is provided with a sway prevention part that protrudes upward at a position away from the sliding door in the door thickness direction, thereby preventing the sliding door from swaying in the thickness direction. An airtight seal is provided at the lower end of the sliding door, which is in airtight contact with the lower fixed surface. The sliding door device according to any one of claims 1 to 3, characterized in that the outer surface of the sliding door is provided with a guided portion that fits into the anti-sway portion and is guided in the opening and closing direction.

5. A suspended sliding door device that allows the aforementioned sliding door to be opened and closed, A rail member that suspends the upper end of the sliding door and guides it in the opening and closing direction, The facility includes an opening frame that is opened and closed by the aforementioned sliding door, The sliding door device according to any one of claims 1 to 3, characterized in that the rail member is provided with a fitting portion that fits into the opening frame.

6. The sliding door device according to claim 5, characterized in that the fitting portion is placed on the upper end of the opening frame and is formed to be in contact with the outer surface of the opening frame.

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