JP2001173282A - Locking device of slide door - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the cooling property or the like by reducing a space between front and rear slide doors. SOLUTION: A locking device 34 is provided on the left side surface of the front slide door 18 which is slidably supported by a lower rail. A first fitting member 36 of the locking device is screwed in a fixed manner in a condition abutted on a left frame 24b of the front slide door 18. A lock 38 provided with a locking pin 38b movable in the longitudinal direction is disposed on the first fitting member 36. The locking pin 38b of the lock 38 is passed through a locking hole 30b formed in the rear slide door 20 at the locking position were a rear portion thereof is projected rearward of the front slide door 18. A lower end of a front plate 62 of a second fitting member 40 disposed on the first fitting member 36 in a vertically movable manner is extended downward of an upper end on the rear side of a forward riser portion on the lower rail at the lowest position with respect to the first fitting member 36, and regulates the forward detachment of the front slide door 18.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a locking device for a slide door disposed in a storage such as a refrigerator showcase, a refrigerator or a refrigerator.

[0002]

2. Description of the Related Art In a grocery store or a convenience store,
A refrigerated showcase for storing and displaying foods and beverages in a refrigerated state is suitably used. In this refrigerated showcase, a storage room for storage of foods, beverages, and the like is defined inside an insulation box body filled with a foam insulation material such as urethane between an inner box and an outer box. On the front side of the heat-insulating box, an opening to be opened forward is opened in a rectangular shape, and the opening is opened and closed by upper and lower rails disposed on the upper and lower inner periphery of the opening. A front slide door and a rear slide door that open and close are slidably supported.

The above-mentioned refrigerated showcase is provided with a locking device for locking 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 mounted on a frame of a front slide door, and a locking bracket is mounted on a shaft facing the frame body rear side of the lock body. Is known. In this locking device, the shaft is pushed around by a key inserted into the lock body, and the fitting is projected and positioned to a position where it can be brought into contact with the frame body of the rear slide door, and both slide doors are locked. .

[0004]

In the above-described locking device, since a metal fitting is provided behind the front slide door (inside the storage), the front and rear gap between the front slide door and the rear slide door is formed by the metal fitting. The door must be set wide enough so as not to hinder the sliding of the door in the unlocked position. That is, the gap before and after the two sliding doors becomes large, and the cooling performance is reduced due to the escape of the cool air from the gap, the outside air enters the storage room, and a large amount of frost is generated in the cooler, or There was a problem that dew was formed on the surface.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned drawbacks inherent in the prior art, and has been proposed in order to preferably solve the problem. An object of the present invention is to provide a locking device for a sliding door that can improve performance and the like.

[0006]

SUMMARY OF THE INVENTION In order to overcome the above-mentioned problems and appropriately achieve the intended purpose, a locking device for a sliding door according to the present invention comprises a box having an opening opening forward,
In a storage provided with a front slide door and a rear slide door that are slidably supported by a lower rail disposed below the inner periphery of the opening to open and close the opening, the storage is disposed on a side surface of the front slide door. A first mounting member, and a locking pin disposed on the first mounting member, the rear portion of which can be positioned at a locking position where the rear portion protrudes rearward of the front slide door and an unlocking position where the rear portion does not protrude. A lock is formed at a position facing the lock pin of the lock on the rear slide door in a state where both the slide doors are positioned at the closed position, and a lock pin positioned at the lock position can be inserted therethrough. And a stop hole.

[0007]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a locking device for a sliding door according to the present invention. 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 provided. In the examples, front and rear and left and right refer to the state in which the refrigerated showcase is viewed from the front side (front side).

A refrigerated showcase 10 shown in FIG. 1 has an insulating box (box) 12 in which an inner box and an outer box are filled with a foam insulating material such as urethane, and a widthwise direction of the box 12. And a cooling unit 14 arranged on one side.
Inside the cooling unit 14, a refrigerating device (not shown) including a compressor, a condenser, and the like is provided, and a cooling device (not shown) provided in a storage chamber defined inside the heat-insulating box 12 includes: The storage chamber is cooled by circulating and supplying the refrigerant from the refrigerating device.

At the front of the heat-insulating box 12, there is formed a rectangular opening 12a which opens forward. An upper rail (not shown) and a lower rail 16 made of synthetic resin are disposed above and below the inner periphery of the opening 12a. The front slide door 18 and the rear slide door 20 are located between the upper and lower rails 16.
Are supported so as to be slidable in the width direction, respectively.
a can be opened and closed. In the embodiment, the front slide door 18 closes the right half of the opening 12a, and the rear slide door 20 closes the left half of the opening 12a.

As shown in FIG. 5, the lower rail 16 comprises a U-shaped frame 16a which is open upward, and a bottom plate 16 which faces between front and rear rising portions 16b, 16b of the frame 16a.
c, two rail strips 16d, 16d, which extend vertically over the entire length in the longitudinal direction (width direction). As shown in FIG. 2, the front sliding door 18 includes a transparent rectangular front transparent body 22 formed of glass, synthetic resin, or the like, and a front frame body 24 disposed around the front transparent body 22. It is composed of The right end of the front frame 24 abuts against the right end of the inner periphery of the opening 12 a so that the right half of the opening 12 a is closed by the front slide door 18. Further, inside the lower frame member 24a in the front frame body 24, a plurality of rollers 26 are spaced apart in the width direction.
The front slide door 18 slides along the upper and lower rails 16 when each roller 26 is rotatably mounted on the front rail strip 16d.

The rear slide door 20 has basically the same structure as the front slide door 18, and includes a transparent rectangular rear transparent body 28 made of glass, synthetic resin, or the like. Rear frame 3 disposed around the outside of rear transparent body 28
0. By contacting the left end of the rear frame 30 with the left end of the inner periphery of the opening 12a, the opening 1
The left half of 2a is closed by the rear slide door 20. A plurality of rollers 32 are rotatably disposed in the lower frame member 30a of the rear frame 30 while being spaced apart in the width direction, and each roller 32 is rotatably mounted on the rear rail strip 16d. By being placed, the rear slide door 20 slides along the upper and lower rails 16. In the lower frame member 30a of the rear slide door 20, a locking hole 30b is formed at a position facing a locking pin 38b of a lock 38 described later, with the slide doors 18 and 20 positioned at the closed position. Have been. In FIG. 6, reference numeral 33 denotes a metal roller holder which is detachably disposed on the lower frame member 30a and holds the roller 32 at a fixed position.
A through-hole 33a is formed at a position corresponding to the hole 33a to allow the insertion of the locking pin 38b.

A locking device 34 for unlocking the front and rear slide doors 18 and 20 is provided on the left side surface of the front slide door 18 (the side surface which does not contact the inner periphery of the opening 12a in the closed position). Have been. The locking device 34 basically includes a first mounting member 36, a lock 38 and a second mounting member 40. As shown in FIGS. 1 and 3, the first mounting member 36 is configured such that the right side plate 44 of the main body 42 formed in a rectangular box shape opened to the rear side is formed by the front frame 24 of the front sliding door 18.
Are arranged in contact with the left frame member 24b. That is, two through holes 44a, 44a are formed in the right side plate 44 so as to be vertically separated from each other.
The first mounting member 36 is disposed and fixed to the front slide door 18 by screwing a screw 46 inserted from the inside of the main body into a corresponding screw hole 24c formed in the left frame member 24b. In addition,
The left side plate 48 of the main body 42 has through holes 44a of the right side plate 44.
A tool hole 48a for allowing insertion of a tool (not shown) such as a screwdriver for tightening and loosening the screw 46 is formed at a position corresponding to.

At the rear end of the right side plate 44, there is formed a positioning plate 50 bent at a right angle toward the front sliding door side.
The first mounting member 36 is positioned in the front-rear direction with respect to the front slide door 18 by contacting the rear surface 4b. The front and rear thicknesses of the main body 42 of the first mounting member 36 are set to be thinner than the front and rear thicknesses of the front slide door 18.
8 is set so as not to protrude.

A lock hole 52a is formed in the front plate 52 of the main body 42 of the first mounting member 36 to allow the lock 38 to be inserted from the front side, and a second hole is formed below the lock hole 52a. A screw hole 52b for fixing the mounting member 40 is formed. As shown in FIG. 3, a rear plate 56 of a predetermined length is vertically 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 into the lock hole 52a is
Positioning is performed by contacting the rear face plate 56. Further, a plurality of through holes 56 a for screws are formed in the rear face plate 56, and the screws 58 inserted into the through holes 56 a are screwed into the rear part of the lock 38 so that the lock 38 is fixed to the first mounting member 36. Is done. An arc-shaped notch 56b is formed at the lower edge of the rear face plate 56 so as to allow the locking pin 38b of the lock 38 to protrude rearward.

The lock 38 has a cylindrical main body 38a and a locking pin 38b arranged so as to be able to move back and forth. The locking pin 38b has a first mounting member 36 (a front sliding door 18) at its rear end. ) Is positioned at a locking position protruding rearward (see FIG. 7) and an unlocking position not protruding rearward (see FIG. 6). Then, by positioning the locking pin 38b at the locking position, the rear portion of the locking pin 38b is locked in the locking hole 3 formed in the rear frame 30 of the rear sliding door 20.
0b and the through hole 33a, the two sliding doors 1
8, 20 are to be locked. The locking pin 38b is positioned at the locking position by being pressed from the front side in a state facing the unlocking position by an appropriate mechanism disposed inside the cylindrical main body 38a, and in a state facing the locking position. It is configured to return to the unlocking position by pressing again from the front side.

As shown in FIG. 1, the second mounting member 40 is formed by vertically suspending a front plate 62 and a rear plate 64 at front and rear ends of an upper plate 60 formed in a rectangular shape. The upper slot 62a for allowing the lock 38 to pass therethrough is formed so as to extend a predetermined length in the vertical direction, and the second attachment member 40 is attached to the lower side of the upper slot 62a by the first attachment. Member 36
The lower elongated hole 62b that allows the threaded portion of the screw 66 to be attached to the connector 66 is formed to extend a predetermined length in the vertical direction. That is, the second mounting member 40 is configured to be vertically movable with respect to the first mounting member 36 by the length of the upper and lower long holes 62a and 62b. The lower end of the front plate 62 of the second mounting member 40 has the lower end at the lower movement position (see FIGS. 5 and 6) where the second mounting member 40 has been moved to the lowermost position with respect to the first mounting member 36. Front rising part 1 of rail 16
6b, it extends below the upper end on the rear side, and functions to regulate removal of the front slide door 18 to the front side. In the lower 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 in front and rear with the front plate 62. It is constituted so that reliable positioning and fixing can be achieved. On the other hand, in the upward movement position (see FIG. 4) in which the second mounting member 40 is moved up most with respect to the first mounting member 36, the front plate 62
The lower end faces substantially the same position as the lower end of the first mounting member 36 so as not to hinder the mounting of the front slide door 18 to the lower rail 16.

[0017]

Next, the operation of the sliding door locking device according to the embodiment will be described.
4 will be described. The right side plate 44 of the first mounting member 36 is brought into contact with the left side surface of the left frame member 24b of the front slide door 18 removed from the heat insulation box 12, and the positioning plate 50 is attached to the rear side. The two members 18 and 36 are positioned by contact. In this state, the screws 46 inserted from the inside of the main body into the respective through holes 44a of the right side plate 44 are screwed into the corresponding screw holes 24c of the left frame member 24b, so that the first mounting member 36 becomes the front slide door 18
Is fixed. The tool into which the screw 46 is inserted is inserted into the main body through a tool hole 48a formed in the left side plate 48 of the main body 42.

Next, the front plate 52 of the first mounting member 36
The lock 38 is inserted from the front side into the lock hole 52a formed in the above, the rear end thereof is brought into contact with the rear face plate 56, and is fixed via a plurality of screws 58. A notch 56b is formed at the lower edge of the rear plate 56, and the lock 38 is allowed to move to the locking position where the rear part of the locking pin 38b projects rearward.

The lock 3 is attached to the first mounting member 36.
8 is inserted through the upper slot 62a, the second mounting member 40 is attached from the front side, and the screw 66 inserted through the lower slot 62b from the front side is screwed into the screw hole 52b of the front plate 52, whereby (2) The mounting member 40 is temporarily fixed to the first mounting member 36. At this time, the second mounting member 40 is moved upwardly with respect to the first mounting member 36 (the upper elongate hole 62).
(a position where the lower end of a is in contact with the lower end of the lock 38) (see FIG. 4).

The front sliding door 18 and the rear sliding door 20 provided with the locking device 34 are moved to the opening 12a with the rollers 26, 32 mounted on the corresponding rails 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 lower movement position, the screw 66 is tightened and securely fixed. I do. Thereby, the front plate 6 of the second mounting member 40 is
2 is connected to the lower rail 16 as shown in FIGS.
At the rear of the front rising portion 16b below the upper end thereof.

When locking the two sliding doors 18 and 20 attached to the heat insulating box 12 as described above, as shown in FIG. 2, with the two sliding doors 18 and 20 positioned at the closed position, The locking pin 38b of the lock 38 is pressed from the front side. As a result, as shown in FIG.
8b projecting rearward from the first mounting member 36, the locking hole 30 formed in the lower frame member 30a of the rear sliding door 20.
b and the through hole 33a of the roller holder 33.
Accordingly, the sliding of the front sliding door 18 in the opening direction (leftward) is restricted, and the opening direction of the rear sliding door 20 is restricted.
(Right) is restricted, and both sliding doors 18, 2
0 is locked in the closed position. 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 lower frame member 30a made of resin, and the lower frame member 30a (locking hole 30b) is formed. Deformation is preferably prevented.

That is, as in the embodiment, the front sliding door 1
The locking device 34 is disposed on the side of the sliding door 8, and the locking pin 38b of the lock 38 is protruded rearward.
0, the locking device 34 does not protrude greatly behind the front sliding door 18 and the two sliding doors 1 are locked.
The gaps before and after 8, 20 can be minimized. Therefore, it is possible to prevent the cooling air from escaping from the storage room and prevent the cooling performance from being lowered, and the outside air enters through the gap, causing a large amount of frost on the cooler and dew on the door. Can also be suppressed.

Further, in the locking device 34 of the embodiment, the front plate 6 of the locking device 34 is positioned with the second mounting member 40 at the lower movement position.
The lower end of 2 is a front rising portion 16 of the lower rail 16.
b protrudes downward from the upper end of the second mounting member 4 even if the front slide door 18 is lifted and removed.
Since 0 is hooked on the front rising portion 16b, the front sliding door 18 does not come off.

In the embodiment, the case where the locking device is disposed on the slide door of the refrigerated showcase has been described. However, the locking device may be employed in a storage such as a refrigerator or a refrigerator.

[0025]

As described above, according to the sliding door locking device of the present invention, the locking device is disposed on the side of the front sliding door, so that the gap between the front and rear sliding doors is set to a minimum. can do. Therefore, it is possible to suppress the cooling performance and the heating performance from being lowered in the storage that cools or heats the inside of the box. Further, in a case where the inside of the box is cooled, such as a refrigerated showcase or the like, it is possible to suppress the occurrence of a large amount of frost on the cooler or dew on the door due to the outside air entering the inside of the box. .

With the second mounting member disposed on the front slide door, it is possible to prevent the front slide door from being removed to the front side in the locked state. In addition, the locking pin is inserted into the through-hole of the roller holder that holds the roller rotatably so as to regulate the slide of the door, compared to the case where the slide is restricted only by the lock hole of the rear slide door. Thus, the strength of the door in the sliding direction can be increased.

[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 the locking device according to the embodiment.

FIG. 3 is a perspective view of a first mounting member of the locking device according to the embodiment as viewed from the rear side.

FIG. 4 is a perspective view of a main part showing a state where the locking device according to the embodiment is disposed on the front slide door.

FIG. 5 is a perspective view of a main part showing a state where front and rear slide doors according to the embodiment are attached to a heat insulating box.

FIG. 6 is a cross-sectional view of a main part showing the locking device according to the embodiment in an unlocked state.

FIG. 7 is a sectional view of a main part showing the locking device according to the embodiment in a locked state.

[Explanation of symbols]

Reference Signs List 12 Insulated 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 first Mounting member, 38 lock, 38b locking pin, 40
Second mounting member

Claims (3)

[Claims] 1. A box (12) having an opening (12a) that opens forward, and a lower rail (16) disposed slidably supported by an inner peripheral lower part of the opening (12a). In a storage provided with a front slide door (18) and a rear slide door (20) for opening and closing an opening (12a), a first mounting member disposed on a side surface of the front slide door (18)
And a locking pin (38b) disposed on the first mounting member (36) and capable of being positioned at a locking position where the rear portion projects rearward of the front slide door (18) and an unlocking position where the rear portion does not project. ) That can move forward and backward, and a locking pin for the lock (38) on the rear slide door (20) in a state where the slide doors (18, 20) are positioned at the closing position. A locking device for a slide door, comprising: a locking hole (30b) formed at a position facing the locking door (38b) and through which a locking pin (38b) positioned at the locking position can be inserted. 2. The second mounting member (4) is attached to the first mounting member (36).
0) is disposed so as to be vertically movable, and the lower end of the second mounting member (40) has an upper end at a rear side of a front rising portion (16b) formed on the lower rail (16) at a lower moving position. The locking device for a slide door according to claim 1, wherein the lock device extends further downward to regulate removal of the front slide door (18) to the front side. 3. The lower rail is attached to the rear slide door (20).
A roller holder (33) for rotatably holding a roller (32) mounted on (16) is provided, and the roller holder (33) and the locking hole (30b) of the rear slide door (20) are provided. The locking device for a slide door according to claim 1 or 2, wherein a through hole (33a) through which the locking pin (38b) can be inserted is formed at a corresponding position.