JP3710661B2 - Locking device for sliding door - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a locking device for a slide door disposed in a storage such as a refrigerated showcase, a refrigerator, or a warm storage.
[0002]
[Prior art]
Refrigerated showcases that store and display food, beverages and the like in a refrigerated state are preferably used in grocery stores and convenience stores. In this refrigerated showcase, a storage room for stored items such as food and beverages is defined inside a heat insulating box filled with a foam heat insulating material such as urethane between an inner box and an outer box. In addition, an opening opening forward is formed in a rectangular shape on the front side of the heat insulation box, and the opening is formed by an upper rail and a lower rail disposed at the upper and lower inner periphery of the opening. A front slide door and a rear slide door that are opened and closed are slidably supported.
[0003]
The refrigerated showcase described above is provided with a locking device that locks both slide doors in a closed state. As this locking device, for example, as disclosed in Japanese Utility Model Publication No. 5-24773, a lock body is attached to a frame body of a front slide door, and a locking metal fitting is attached to a shaft facing the rear side of the frame body of the lock body. There is a known arrangement. In this locking device, the shaft is pushed and rotated by a key inserted into the lock body, the metal fitting is projected and positioned to a position where it can contact the frame of the rear slide door, and both slide doors are locked. .
[0004]
[Problems to be solved by the invention]
In the locking device described above, the metal fittings are arranged on the rear side (inside the warehouse) of the front slide door, so that the front and rear gaps between the front slide door and the rear slide door are in a state where the metal fitting faces the unlocking position. It should be set wide enough not to interfere with the sliding of the door. That is, the clearance between the front and rear of both sliding doors increases, cooling performance decreases due to the escape of cold air from the clearance, outside air enters the storage chamber, and a large amount of frost is formed in the cooler, or the door There were problems such as exposure to water.
[0005]
OBJECT OF THE INVENTION
The present invention has been proposed in view of the above-mentioned drawbacks inherent in the prior art described above, and has been proposed to suitably solve this problem. The gap between the front and rear sliding doors is reduced, and the cooling performance and the like are improved. It aims at providing the locking device of the slide door to obtain.
[0006]
[Means for Solving the Problems]
In order to overcome the above-mentioned problems and achieve the desired purpose suitably, the sliding door locking device according to the present invention comprises:
A box having an opening that opens to the front, and a front slide door and a rear slide door that are slidably supported by a lower rail disposed at a lower inner periphery of the opening to open and close the opening , The front slide door is configured by arranging a front frame body on the outer periphery of the front see-through body, and the rear slide door is configured by arranging the rear frame body on the outer periphery of the rear see-through body ,
A first mounting member disposed on a side surface of the front sliding door;
A lock provided on the first mounting member and having a locking pin which can be positioned in a locking position where the rear part protrudes rearward of the front sliding door and an unlocking position where it does not protrude;
A locking pin that is formed at a position facing the locking pin of the lock in the rear frame body of the rear slide door with the slide doors positioned at the closed position, and through which the locking pin positioned at the locking position can be inserted. A blind hole ,
A roller holder disposed inside a lower frame member in a rear frame body of the rear slide door, and rotatably holding a roller placed on the lower rail;
The roller holder is formed at a position corresponding to the locking hole of the rear slide door, and is constituted by a through hole through which the locking pin can be inserted .
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Next, a preferred embodiment of the sliding door locking device according to the present invention will be described below with reference to the accompanying drawings. FIG. 1 shows the locking device according to the embodiment in an exploded state, and FIG. 2 shows a refrigerated showcase in which the locking device of the embodiment is arranged. In the examples, front and rear and left and right refer to the refrigerated showcase as viewed from the front side (front side).
[0008]
A refrigerated showcase 10 shown in the figure includes a heat insulating box (box) 12 in which a foam heat insulating material such as urethane is filled between an inner box and an outer box, and one side portion in the width direction of the box 12. The cooling unit 14 is basically configured. Inside the cooling unit 14, a refrigeration apparatus (not shown) including a compressor, a condenser, and the like is arranged, and a cooler (not shown) arranged in a storage chamber defined in the heat insulating box body 12, By circulating and supplying the refrigerant from the refrigeration apparatus, the storage chamber is cooled.
[0009]
A rectangular opening 12 a that opens forward is formed at the front of the heat insulating box 12. A synthetic resin upper rail (not shown) and a lower rail 16 are disposed above and below the inner periphery of the opening 12a. The front slide door 18 and the rear slide door 20 are supported so as to be slidable in the width direction between the upper and lower rails 16 so that the opening 12a can be opened and closed. In the embodiment, the front slide door 18 is set to close the right half of the opening 12a, and the rear slide door 20 is set to close the left half of the opening 12a.
[0010]
As shown in FIG. 6 , the lower rail 16 is erected with a U-shaped frame body 16a opened upward and a bottom plate 16c facing the front and rear rising portions 16b, 16b of the frame body 16a. The two rail strips 16d and 16d extend over the entire length in the longitudinal direction (width direction). As shown in FIG. 2, the front slide door 18 includes a transparent rectangular front see-through body 22 formed of glass, synthetic resin, or the like, and a front frame body 24 disposed on the outer periphery of the front see-through body 22. It consists of. The right half of the opening 12a is closed by the front slide door 18 by bringing the right end of the front frame 24 into contact with the inner right side end of the opening 12a. A plurality of rollers 26 are rotatably disposed in the lower frame member 24a of the front frame 24 so as to be spaced apart from each other in the width direction, and each roller 26 is rotatably mounted on the rail rail 16d on the front side. As a result, the front sliding door 18 slides along the upper and lower rails 16.
[0011]
The rear slide door 20 basically has the same structure as the front slide door 18, and includes a transparent rectangular rear perspective body 28 made of glass, synthetic resin, or the like, and the rear perspective body. 28 and a rear frame 30 disposed around the outer periphery of 28. Then, the left half of the opening 12a is closed by the rear slide door 20 by bringing the left end of the rear frame 30 into contact with the inner peripheral left end of the opening 12a. A plurality of rollers 32 are rotatably disposed in the lower frame member 30a of the rear frame 30 so as to be spaced apart from each other in the width direction, and each roller 32 is rotatably mounted on the rear rail 16d. By being placed, the rear slide door 20 slides along the upper and lower rails 16. Note that a locking hole 30b is formed in the lower frame member 30a of the rear sliding door 20 at a position facing a locking pin 38b of a lock 38, which will be described later, with both the sliding doors 18 and 20 positioned at the closed position. Has been. In FIG. 6, reference numeral 33 denotes a metal roller holder that is detachably disposed on the lower frame member 30 a and holds the roller 32 in a fixed position, and is associated with a position corresponding to the locking hole 30 b of the holder 33. A through hole 33a that allows insertion of the stop pin 38b is formed.
[0012]
A locking device 34 that locks the front and rear slide doors 18 and 20 so as to be unlockable is disposed on the left side surface of the front slide door 18 (the side surface that does not contact the inner periphery of the opening 12a in the closed position). . The locking device 34 basically includes a first attachment member 36, a lock 38, and a second attachment member 40. As shown in FIGS. 1 and 3, the first attachment member 36 includes a left frame member 24 b in the front frame body 24 of the front slide door 18, in which the right side plate 44 of the main body 42 formed in a rectangular box shape opened to the rear side. It arrange | positions in the state contact | abutted to. That is, two through holes 44a and 44a are formed in the right side plate 44 so as to be separated from each other in the vertical direction, and a screw 46 inserted into each through hole 44a from the inside of the main body is inserted into a corresponding screw hole 24c formed in the left frame member 24b. By screwing, the first attachment member 36 is disposed and fixed to the front slide door 18. A tool that allows a tool (not shown) such as a screwdriver for tightening and loosening the screw 46 to be inserted into the left side plate 48 of the main body 42 at a position corresponding to each through hole 44a of the right side plate 44. A hole 48a is formed.
[0013]
A positioning plate 50 bent at a right angle toward the front slide door side is formed at the rear end of the right side plate 44, and the positioning plate 50 abuts against the rear surface of the left frame member 24b of the front slide door 18. Thus, the front-rear direction positioning of the first mounting member 36 with respect to the front slide door 18 is performed. The front and rear thickness dimensions of the main body 42 in the first mounting member 36 are set to be thinner than the front and rear thickness dimensions of the front slide door 18 so that the front and rear ends of the main body 42 do not protrude forward and backward of the front slide door 18. .
[0014]
The front plate 52 of the main body 42 of the first mounting member 36 is formed with a locking hole 52a that allows insertion from the front side of the lock 38, and the second mounting member 40 is provided below the locking hole 52a. The fixing screw hole 52b is formed. Further, as shown in FIG. 3, a rear plate 56 having a predetermined length is suspended from the rear end of the upper plate 54 of the main body 42, and the rear end of the lock 38 inserted from the front through the locking hole 52a Positioning is performed by contacting the rear plate 56. Further, a plurality of screw through holes 56 a are formed in the rear plate 56, and the lock 38 is fixed to the first mounting member 36 by screwing screws 58 inserted into the through holes 56 a into the rear part of the lock 38. Is done. An arcuate cutout 56b is formed at the lower end edge of the rear plate 56, and is configured to allow the locking pin 38b of the lock 38 to protrude rearward.
[0015]
In the lock 38, a locking pin 38b is disposed on a cylindrical main body 38a so as to be movable back and forth, and the locking pin 38b has a rear portion behind the first mounting member 36 (the front slide door 18). Are positioned at a locking position (see FIG. 7) that protrudes to the rear and an unlocking position (see FIG. 6) that does not protrude rearward. Then, by positioning the locking pin 38b at the locking position, the rear portion of the locking pin 38b is inserted into the locking hole 30b and the through hole 33a formed in the rear frame body 30 of the rear slide door 20. Both slide doors 18 and 20 are locked. The locking pin 38b is positioned at the locking position by pressing from the front side while facing the unlocking position by an appropriate mechanism disposed inside the cylindrical main body 38a, and in the state facing the locking position. It is configured to return to the unlocked position by pressing again from the front side.
[0016]
As shown in FIG. 1, the second mounting member 40 is configured by vertically suspending a front plate 62 and a rear plate 64 at the front and rear ends of a rectangular upper plate 60. An upper elongated hole 62a that allows insertion of the lock 38 is formed to extend in a vertical direction with a predetermined length, and a second attachment member 40 is formed on the first attachment member 36 below the upper elongated hole 62a. A lower long hole 62b that allows insertion of the screw portion of the screw 66 for attachment is formed to extend in a vertical direction with a predetermined length. That is, the second mounting member 40 is configured to be movable up and down by the length of the upper and lower long holes 62 a and 62 b with respect to the first mounting member 36. It should be noted that the front plate 62 of the second mounting member 40 has its lower end at the lower position when the second mounting member 40 is moved most downward relative to the first mounting member 36 (see FIGS. 5 and 6). The rail 16 extends downward from the upper end on the rear side of the front rising portion 16b and functions to restrict the front slide door 18 from being removed to the front side. In the downward movement position, the rear plate 64 of the second mounting member 40 faces the rear side of the rear plate 56 of the first mounting member 36 and sandwiches the main body 42 with the front plate 62 in the front-rear direction. It is configured so that reliable positioning and fixing can be achieved. On the other hand, the lower end of the front plate 62 is substantially the same as the lower end of the first attachment member 36 at the upward movement position (see FIG. 4) where the second attachment member 40 is moved most up relative to the first attachment member 36. At the position, the mounting of the front slide door 18 to the lower rail 16 is not hindered.
[0017]
[Effect of the embodiment]
Next, the operation of the locking device for the sliding door according to the embodiment will be described first with respect to the procedure for disposing the locking device 34 on the front sliding door 18. The left frame 24b of the front sliding door 18 removed from the heat insulating box 12 is brought into contact with the right side plate 44 of the first mounting member 36 on the left side, and the positioning plate 50 is placed on the rear side. Both 18 and 36 are positioned by contact. In this state, the first mounting member 36 is attached to the front slide door 18 by screwing the screws 46 inserted from the inside of the main body into the through holes 44a of the right side plate 44 into the corresponding screw holes 24c of the left frame member 24b. Positioning is fixed. A tool for screwing the screw 46 is inserted into the main body through a tool hole 48 a formed in the left side plate 48 of the main body 42.
[0018]
Next, the lock 38 is inserted into the lock hole 52a formed in the front plate 52 of the first mounting member 36 from the front side, the rear end is brought into contact with the rear plate 56, and a plurality of screws 58 are interposed. And fix. A notch 56b is formed at the lower edge of the rear plate 56, and movement to the locking position where the rear portion of the locking pin 38b of the lock 38 protrudes rearward is allowed.
[0019]
Further, the second mounting member 40 is mounted from the front side with the lock 38 inserted into the upper long hole 62a with respect to the first mounting member 36, and the screw 66 inserted from the front side into the lower long hole 62b is attached to the front plate 52. The second mounting member 40 is temporarily fixed to the first mounting member 36 by being screwed into the screw hole 52b. At this time, the second mounting member 40 is positioned in the upward movement position (the position where the lower end of the upper elongated hole 62a abuts the lower end of the lock 38) moved most up with respect to the first mounting member 36 (FIG. 4). reference).
[0020]
The front slide door 18 and the rear slide door 20 provided with the locking device 34 are attached to the opening 12a in a state where the rollers 26 and 32 are placed on the corresponding rail strips 16d of the lower rail 16 ( (See FIG. 6). Then, the screw 66 temporarily fixing the second mounting member 40 to the first mounting member 36 is loosened, and after the second mounting member 40 is moved down to the downward movement position, the screw 66 is tightened to be securely fixed. To do. As a result, the lower end of the front plate 62 in the second mounting member 40 extends below the upper end on the rear side of the rising portion 16b on the front side of the lower rail 16, as shown in FIGS.
[0021]
As described above, when both the slide doors 18 and 20 attached to the heat insulating box 12 are locked, as shown in FIG. 2, the lock 38 is positioned with both the slide doors 18 and 20 positioned at the closed position. The locking pin 38b is pressed from the front side. As a result, as shown in FIG. 7, the rear portion of the locking pin 38b protrudes rearward from the first mounting member 36, and the locking hole 30b formed in the lower frame member 30a of the rear slide door 20 and the roller holder 33 pass therethrough. It is inserted through the hole 33a. Accordingly, sliding of the front sliding door 18 in the opening direction (leftward) is restricted, and sliding of the rear sliding door 20 in the opening direction (rightward) is restricted, so that both sliding doors 18 and 20 are in the closed position. Locked in. Since the roller holder 33 is made of metal, the strength in the sliding direction is higher than when the locking pin 38b is restricted only by the resin lower frame material 30a, and the lower frame material 30a (the locking hole 30b) Deformation is preferably prevented.
[0022]
That is, in the configuration in which the locking device 34 is disposed on the side surface of the front slide door 18 as in the embodiment and the both slide doors 18 and 20 are locked only by projecting the locking pin 38b of the lock 38 rearward, The locking device 34 does not protrude greatly on the rear side of the slide door 18, and the gap between the front and rear of the slide doors 18, 20 can be minimized. Therefore, it is possible to prevent the cooling performance from deteriorating by suppressing the escape of cool air from the storage room, and when the outside air enters from the gap, a large amount of frost is formed on the cooler and the door is exposed to dew. It can also be suppressed.
[0023]
Further, in the locking device 34 of the embodiment, the lower end of the front plate 62 projects downward from the upper end of the front rising portion 16b in the lower rail 16 in a state where the second mounting member 40 is positioned at the downward movement position. Even if the front sliding door 18 is lifted and removed, the second mounting member 40 is caught by the front rising portion 16b, so that the front sliding door 18 cannot be removed.
[0024]
In the embodiment, the case where the locking device is disposed on the slide door of the refrigerated showcase has been described.
[0025]
【The invention's effect】
As described above, according to the locking device for a slide door according to the present invention, since the locking device is disposed on the side surface of the front slide door, the clearance between the front and rear slide doors can be set to the minimum necessary. Therefore, it can suppress that the cooling performance and heating performance fall in the store which cools or heats the inside of a box. Moreover, in what cools the inside of a box like a refrigerated showcase etc., generation | occurrence | production of a lot of frost to a cooler and dew condensation to a door resulting from external air entering into the box can be suppressed. . In addition, the lock pin is also inserted into the through hole of the roller holder that holds the roller rotatably, so that the sliding of the door is restricted, so that the slide is restricted only by the locking hole of the rear slide door. The strength with respect to the sliding direction of the door can be increased.
[0026]
The second mounting member disposed on the front slide door can prevent the front slide door from being removed in the locked state .
[Brief description of the drawings]
FIG. 1 is an exploded perspective view showing a locking device according to an embodiment of the present invention.
FIG. 2 is a perspective view of a refrigerated showcase provided with a locking device according to an embodiment.
FIG. 3 is a perspective view of the first mounting member of the locking device according to the embodiment when viewed from the rear side.
FIG. 4 is a main part perspective view showing a state in which the locking device according to the embodiment is arranged on the front slide door.
FIG. 5 is a main part perspective view showing a state in which the front and rear sliding doors according to the embodiment are attached to a heat insulating box.
FIG. 6 is a cross-sectional view of an essential part showing the locking device according to the embodiment in an unlocked state.
FIG. 7 is a cross-sectional view of an essential part showing the locking device according to the embodiment in a locked state.
[Explanation of symbols]
12 heat insulation box (box), 12a opening, 16 lower rail 16b rising part (front rising part), 18 front sliding door 20 rear sliding door, 30b locking hole, 33 roller holder, 33a through hole 36 1st Mounting member, 38 lock, 38b Locking pin, 40 Second mounting member

Claims (2)

A box (12) having an opening (12a) that opens forward, and an opening (12a) that is slidably supported by a lower rail (16) disposed at an inner peripheral lower portion of the opening (12a). and a front sliding door (18) and a rear sliding door for opening and closing (20), said front sliding door (18) is constructed by disposing a front frame (24) on the outer periphery of the front lens body (22) The rear slide door (20) is a storage configured by arranging a rear frame body (30) around the outer periphery of the rear fluoroscopic body (28) ,
A first mounting member (36) disposed on a side surface of the front sliding door (18);
A locking pin (38b), which is disposed on the first mounting member (36) and whose rear portion can be positioned at the locking position where it protrudes rearward of the front sliding door (18) and the unlocking position where it does not protrude, can be moved back and forth. The lock (38)
The position facing the locking pin (38b) of the lock (38) in the rear frame (30) of the rear slide door (20) in a state where the slide doors (18, 20) are positioned at the closed position. A locking hole (30b) through which a locking pin (38b) positioned at the locking position can be inserted , and
A roller disposed inside the lower frame member (30a) of the rear frame (30) of the rear slide door (20) , and rotatably holds a roller (32) placed on the lower rail (16). Holder (33) ;
Are formed at positions corresponding to the locking hole of the rear sliding door (20) (30b) in the roller holder (33), said locking pin (38b) is constructed from an insertion possible through holes (33a) A sliding door locking device.   A second mounting member (40) is disposed on the first mounting member (36) so as to be movable up and down, and a lower end of the second mounting member (40) is formed on the lower rail (16) at the lower movement position. The sliding door locking device according to claim 1, wherein the locking device is configured to extend downward from the upper end on the rear side of the front rising portion (16b) so as to restrict removal of the front sliding door (18) to the front side.

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