JP2509586Y2 - Double door opening / closing device - Google Patents

Description

[Detailed description of the device] [Industrial applications]

The present invention relates to a door opening / closing device which can be attached to a main body of a refrigerator or the like and which can be opened left and right.

[Prior art]

Conventionally, as an opening / closing device for a single-opening door of a refrigerator, for example, there is one as shown in FIG. This opening / closing device is provided with doors 31u, 31 that are rotatably pivoted above and below the left end of the refrigerator body 32.
Open command switches 36u and 36l are provided at the free end of the main body 32, while an open / close detection switch 37u (37l) is provided near the door pivot portion of the main body 32 to turn on / off the door to be opened / closed. Rod 34u by open command signal from (36l)
(34l) is projected and the doors 31u, 31 are pushed open, and when the open / close detection switch 37u (37l) detects the open door, the rod 34u
Door opening device 33u (33l) that can immerse (34l) body 3
It is provided at the right end of 2. On the other hand, as a door that can be opened to the left and right, there is one that has been proposed by the applicant in Japanese Patent Application No. 1-134018. This double door opening / closing device has hinge pins protruding from the left and right ends of the refrigerator body (see FIG. 1), and an engaging groove for engaging the hinge pin on the door and a hinge pin engaging with the engaging groove. A pair of latch plates that lock the latch plates together and a link mechanism that links the latch plates so as to prevent rotation of the other latch plate by linking with the rotation of one latch plate in the lock release direction (See Fig. 1), the size of the door is slightly thicker, but it was an epoch-making one that met the needs of users who want to open and close the door from both the left and right sides.

[Problems to be solved by the device]

However, the above-mentioned conventional double door opening / closing device has left and right double doors, but since the user opens and closes the door by pushing and pulling the door by hand, both hands of the user are opened. However, there is a problem that it cannot be opened and closed easily if it is blocked with food or the like. To solve this problem, for example, the fifth
It is conceivable to provide the opening devices 33u, 33l of the open doors described in the figure at the left and right ends of the refrigerator body 32. However, if the opening devices 33u and 33l are provided at both ends of the main body 32, the storage space of the refrigerator is reduced accordingly, and the inner surfaces of the doors 31u and 31 are hit by the rods 34u and 34l to open the doors. There is a drawback that the door is damaged, a large force is required on both doors, and the rods 34u and 34l project outside the main body 32 when the door is opened, which impairs safety and aesthetics.
In addition, the doors 31u and 31 cannot be fully closed automatically only with the opening devices 33u and 33l, and the door remains half-opened unless the user pushes the door in and completely closes it. There is a drawback that. Therefore, the purpose of the present invention is to automatically use the door with a small amount of power without reducing the storage space inside the main body by effectively utilizing the space of the double door and the opening / closing mechanism unique to the double door, which is thicker than the single door. (EN) Provided is an opening / closing device for a double door that can be opened and closed without damaging the door and does not impair safety and aesthetics.

[Means for Solving the Problems]

In order to achieve the above object, the double door opening / closing device of the present invention has hinge pins protruding from both left and right ends of a main body to which the left and right double doors are attached, while the door has an engaging groove for engaging the hinge pin. A fixed plate having a lock pin, and a pair of latch plates having lock pins are rotatably attached to the fixed plate so that the hinge pin can be restrained in the engaging groove. Part is connected by a link mechanism having a lock groove into which the lock pin fits, and is connected to the rotation of one latch plate in the restraint release direction to prevent the rotation of the other latch plate. Of the above, the left and right latch plates are rotated to the left,
A motor on the right, an opening / closing command switch for inputting a signal for instructing any one of right opening, right closing, left opening, and left closing of the door, and the left, according to a command signal from the opening / closing command switch, One of the right motors is provided with a control unit that outputs a drive signal for releasing the restraint of the latch plate and rotating the latch plate in either of the restraint directions. Further, on both left and right ends of the door, an opening / closing detection switch which comes in contact with and separates from the front surface of the main body according to the opening / closing of the opening / closing is provided, and when the output signal of the opening / closing detection switch changes, the above control unit The output of the drive signal may be stopped. Further, a friction clutch that transmits a torque equal to or less than a certain value can be provided between the latch plate and the motor.

[Action]

When opening, for example, the left end of the closed door, the user inputs a left-opening command signal from the opening / closing command switch. The control unit receives the command signal for left opening and outputs a drive signal for rotating the latch plate in the restraint releasing direction to the left motor.
Thus, the left latch plate in the door rotates so as to push the left hinge pin of the main body out of the engagement groove, and the link mechanism is linked to this rotation to prevent the right latch plate from rotating. . Therefore, the right hinge pin of the main body is restrained in the engagement groove by the right latch plate in the door, and the door is pivoted around the right hinge pin to be automatically opened. Next, the user swivels the left end of the open door around the right hinge pin until the left latch plate inside the door abuts the left hinge pin of the main body, and then closes the open / close command switch. Input the command signal for left closing. Then, the control unit receives a command signal for closing the left side and outputs a drive signal for rotating the latch plate in the restraining direction to the left motor, whereby the left latch plate causes the left hinge pin to move in the engaging groove. Rotate so as to be restrained. Therefore, the left end of the door is pressed against the front surface of the main body and automatically and completely closed. Even when the door is opened to the right and closed to the right, the door is automatically opened and closed by the same operation as described above. Also, if opening detection switches are provided at both ends of the door, for example, when the left opening / closing detection switch of the door separates from the front surface of the main body when the left end is opened, and the output signal (ON / OFF) changes, the control unit causes the motor to operate. The output of the drive signal is stopped to stop the rotation of the left latch plate in the restraint release direction. Conversely, when the left open / close detection switch comes into contact with the front surface of the main unit when the left end is closed, and the output signal changes, the control unit stops the output of the drive signal to the motor, and the left latch plate is locked. Rotation stops. Therefore, useless driving of the motor is eliminated, and energy can be saved. In addition, if a friction clutch is installed between the latch plate and the motor, when the power supply to the motor is stopped due to a malfunction or the motor is locked, the friction clutch slips by manually applying a torque exceeding a certain value. Thus, the door can be opened and closed, and an abnormally large output torque of the motor can be prevented from being applied to the latch plate.

【Example】

Hereinafter, the present invention will be described in detail with reference to the illustrated embodiments. FIG. 1 is an external perspective view showing an embodiment of a double door opening / closing device of the present invention. The opening / closing device is a left and right end of a refrigerator body 2 to which upper and lower doors 1u, 1 capable of opening left and right can be attached. While hinge pins 3au, 3bu; 3al, 3bl are projected on the part, engaging grooves 5au, 5bu (5al, 5bl) that engage with the hinge pins 3au, 3bu (3al, 3bl) are provided on both left and right ends, and various The fixing plate 4 (see FIG. 2) to which the above member is attached is laterally fixed to the door 1u (1). Well, the opening / closing command switch 6bu (6bl) for inputting a signal for instructing either the right opening or the right closing of the door 1u (1) is opened at the left end and the same for closing the left. Opening and closing command switches 6au (6al) are provided respectively, and opening and closing detection switches 7au, 7bu are turned on and off at the left and right ends of the door 1u (1) by contacting and separating from the front surface of the main body 2 as the ends open and close. (7al, 7bl) is provided. The structure and operation of the above-mentioned opening / closing device are as follows.
Since the same applies to u and 1, only the upper door 1u will be described with reference to FIG. As shown in FIG. 2, the pivots 8a, 8 at both ends of the fixed plate 4 are
In b, the hinge plates 3a, 3b that engage with the engagement grooves 5a, 5b, the latch plate 9a, which is restrained in the engagement grooves by the latch grooves 10a, 10b,
9b is pivotally mounted, and the inner adjacent pivots 11a, 11b have a lock groove 13 having a slide guide portion 14a (14b) and a stopper portion 15a (15b).
Lock pins 16a, 16b pivotally attached to swing links 12a, 12b forming a (13b) and projecting on latch plates 9a, 9b for restricting rotation.
While engaging the lock grooves 13a, 13b, respectively,
The springs 17a and 17b that rotate the inner ends of the latch plates 9a and 9b around the respective locking pins 18a and 18b are set to the refrigerator main body 2 side, that is, to the restrained position when engaged with the hinge pin, and when not engaged with the hinge pin. Respectively urge the body 2 to the opposite side, that is, to the restraint release position. Further, the left and right swing links 12a, 12b are connected by a connecting link 19 via the pins 20a, 20b at both ends, and are linked to the rotation of one latch plate 9a (9b) in the restraint release direction and the other. The link mechanism 21 for blocking the rotation of the latch plate 9b (9a) is constructed. That is, when the left latch plate 9a shown in FIG. 2 rotates in the restraint releasing direction as shown by the arrow against the spring 17a as the left end of the door 1 opens, the left swing link 12a and the connecting link 1
9, by the movement of the right swing link 12b in the direction of the arrow, the lock pin 16b of the right latch plate 9b is fitted into the stopper portion 15b of the right swing link 12b by the spring 17b, and the right latch plate
The rotation of 9b is blocked, and the hinge pin 3b is restrained in the engagement groove 5b at the right end of the door 1, while the left latch plate 9a is reversed by the spring 17a whose position is changed, that is, in the arrow direction in the figure, that is, the restraint is released. Biased into position. Therefore, the door 1 is pivoted about the right hinge pin 3b by 90 ° and then 180 ° to be opened. On the contrary, when the left latch plate 9a shown in FIG. 3 comes into contact with the left hinge pin 3a as the left end of the door 1 is closed, the lock pin 16a causes the tip of the slide guide portion 14a of the lock groove 13a as shown. Therefore, the left latch plate 9a is rotated in the direction of the arrow in the figure, and is urged to the restrained position (the direction of the arrow) by the spring 17a whose position is changed, returning to the state of FIG.
The hinge pin 3a is again restrained in the engagement groove 5a. Further, since the lock pin 16a returns to the bent portion of the lock groove 13a, the link mechanism 21 is returned to the neutral position and the lock pin 16b of the right latch plate 9b is returned from the stopper portion 15b to the slide guide portion 14b as shown in FIG. Then, the door 1 fully closes the refrigerator body 2. The door 1
When opening and closing from the right side, the above operation is opened and closed by left and right operations. As shown in FIG. 2, the open / close detection switch 7a (7b) shown in FIG. 1 has a top portion on the left (right) pivot (11a (11b) of the fixed plate 4).
A right-angled triangular swing arm 22a (22b) which is pivotally mounted in the vicinity of and is biased by a spring (not shown) to a protruding position shown in the left half of FIG. Is fixed on the fixed plate 4 inside the swing arm 22a (22b), and when the swing arm 22a (22b) is in the projecting position, it is separated and turned off, and the swing arm 22a (22b) is moved to the main body. The micro switch 23a (23a (23
It consists of b). In the switchgear of the present embodiment, in addition to the above configuration, the fourth
Align the left (right) latch plate 9a (9b) with its
A motor 24a (24b) that rotates forward and backward via 8a (8b),
A friction clutch 25, which is provided between the output shaft of the motor 24a (24b) and the pivot shaft 8 and transmits a torque equal to or less than a certain value.
Depending on the command signal from the open / close command switch 6a, 6b (see FIG. 1) passing through a (25b) and the connector 26a (26b), this can be forward or reverse rotation to either the left or right motor 24a, 24b. A control unit (not shown) is provided which outputs a drive signal for causing the microswitch 23a or 23b to stop outputting the drive signal when the output signal from the microswitch 23a or 23b changes from on to off or from off to on. The operation of the double-door opening / closing device configured as described above is as follows. When opening, for example, the left end of the door 1 which is closed as shown in FIG. 2, the user inputs a left open command signal from the left open / close command switch 6a. The control unit receives the command signal for opening to the left and outputs a drive signal for rotating the latch plate 9a to the left motor 24a (see FIG. 4) in the arrow direction shown in the figure, that is, in the restraint releasing direction. Thus, the left latch plate 9a in the door 1 rotates so as to push out the left hinge pin 3a of the refrigerator main body 2 from the engaging groove 5a, and the link mechanism 21 is linked to this rotation and is indicated by the arrow in the figure. Thus, the lock pin 16b of the right latch plate 9b fits into the stopper portion 15b, and the rotation of the right latch plate 9b is blocked. Therefore, the right hinge pin 3b of the main body 2 is restrained in the engaging groove 5b by the right latch plate 9b in the door 1, and the door 1 is pivoted around the right hinge pin 3b to be automatically opened. Then, when the left swing arm 22a moves away from the front surface of the main body 2 and the output signal of the micro switch 23a changes from on to off, the control unit stops the output of the drive signal to the left motor 24a, The rotation of the left latch plate 9a in the arrow direction stops. Even if the rotation of the latch plate 9a is stopped, the door 1 continues to rotate due to the inertia when the hinge pin 3a is pushed out, and is opened up to about 90 ° through the state shown in FIG. Next, the user pivots the left end of the open door around the right hinge pin 3b until the left latch plate 9a of the door 1 abuts on the left hinge pin 3a of the main body 2, and the left hinge plate 3b of FIG. After closing through the states, a left closing command signal is input from the left opening / closing command switch 6a. Then, the control unit receives a command signal for closing the left side, and outputs a drive signal for rotating the latch plate 9a to the left motor 24a in the arrow direction in FIG. 9a rotates so as to restrain the left hinge pin 3a in the engagement groove 5a. Therefore, the left end of the door 1 is pressed against the front surface of the main body 2 to be completely closed automatically as shown in FIG. 2, and does not remain in a half-open state as in the conventional case. At this time, the left swing arm
When the output signal of the micro switch 23a changes from OFF to ON when the 22a comes into contact with the main body 2, the control unit controls the left motor.
The output of the drive signal of 24a is stopped, and the rotation of the left latch plate 9a is stopped. When the door 1 is opened to the right and closed to the right, the door is automatically opened and closed by the same operation as described above. As described above, according to the present invention, the space of the thick double door 1 and the opening / closing mechanism thereof are effectively used, and the left and right latch plates 9a and 9b are used.
Since the doors are opened and closed by rotating the motors 24a and 24b through the pivots 8a and 8b, the storage space in the main body 2 is not reduced, and the door 1 is not damaged and can be operated with a small power. The door can be opened and closed automatically, and the rod 34u
(34l) does not protrude outside the body, so safety and aesthetics can be improved. In the above embodiment, by providing the open / close detection switch 7a, 7b,
Since the control unit stops the output of the drive signal to the motor due to the change of the output signal, wasteful driving of the motor is eliminated and energy can be saved. Further, as shown in FIG. 4, the friction clutch 2 is provided between the latch plate 9a and the motor 24a.
Since 5a is provided, even if power supply to the motor 24a is stopped due to a failure or the motor 24a is locked,
It is possible to manually open and close the door 1 by sliding the friction clutch by applying a torque exceeding a certain value, and prevent an abnormally large output torque of the motor 24a from being applied to the pivot 8a and the latch plate 9. The opening / closing detection switches 7a, 7b of the embodiment may omit the friction clutches 25a, 25b. Further, the left and right opening / closing command switches of the embodiment may be collectively provided in one place of the door or the main body.

[Effect of device]

As is apparent from the above description, the double door opening / closing device of the present invention has hinge pins projecting from the left and right ends of the main body while fixing a fixing plate having an engaging groove for engaging the hinge pins to the door. , A pair of rotating latch plates for restraining the hinge pins in the engaging grooves are attached to the fixing plate, and the latch plates are linked to the rotation of one latch plate in the restraint release direction to prevent the other latch plate from rotating. In the case where both the latch plates are connected by the link mechanism as described above, the left and right motors for rotating the left and right latch plates, and the open / close command switch for inputting the command signals of right opening, right closing, left opening and left closing of the door are provided. , A control unit that outputs a drive signal for releasing the restraint or rotating the latch plate to either the left or right motor in response to a command signal from this switch is used. Reduces storage space Without, can automatically open and close the door with a small power without danger of the door of damage, yet the operating rod or the like for opening and closing does not protrude outside the body, it is possible to improve the safety and aesthetics. In addition, if an open / close detection switch is provided, it is possible to save energy by eliminating unnecessary driving of the motor, and if a friction clutch is provided, the door can be opened and closed manually even when power supply is stopped.
It is possible to prevent transmission of excessive torque from the motor to the latch plate or the like.

[Brief description of drawings]

FIG. 1 is an external perspective view showing an embodiment of a double door opening / closing device of the present invention, and FIGS. 2 and 3 are fully closed views of the above embodiment, respectively.
FIG. 4 is a plan view showing a half-opened state, FIG. 4 is a view showing a drive mechanism of the latch plate of the above embodiment, and FIG. 5 is an external perspective view showing a conventional opening / closing device for a single-opening door. 1 (1u, 1) ... Door, 2 ... Refrigerator whole, 3a, 3b ... Hinge pin, 4 ... Fixing plate, 5a, 5b ... Engagement groove, 6a, 6b ... Open / close command switch, 7a, 7b ... Open / close detection switch, 8a , 8b ... Axis, 9a, 9b
... Latch plate, 12a, 12b ... Swing link, 13a, 13b ... Lock groove, 14a, 14b ... Slide guide part, 15a, 15b ... Stopper part,
16a, 16b ... Lock pin, 19 ... Connecting link, 21 ... Link mechanism, 22a, 22b ... Swing arm, 23a, 23b ... Micro switch, 24a (24b) ... Motor, 25a (25b) ... Friction clutch.

Claims (3)

(57) [Scope of utility model registration request] 1. A hinge pin is provided at both left and right ends of a main body to which a door that can be opened to the left and right is attached, and a fixing plate having an engaging groove that engages with the hinge pin is fixed to the door and locked to the fixing plate. A pair of latch plates having pins are rotatably attached so that the hinge pins can be restrained in the engagement grooves, and both latch plates are composed of a slide guide part and a stopper part, and the lock pin is fitted with the lock plate. In the opening / closing device for a double-opening door, which is connected by a link mechanism having a groove and is connected to the rotation of one latch plate in the restraint release direction to prevent the rotation of the other latch plate, Left and right motors that rotate the latch plate,
An open / close command switch for inputting a signal for instructing any one of right opening, right closing, left opening, and left closing of the door, and either the left or right motor depending on the command signal from the opening / closing command switch. An opening / closing device for a double-opening door, comprising: a control unit that outputs a drive signal for releasing the latch plate from the lock and rotating the latch plate in either direction. 2. An opening / closing detection switch which is turned on / off by contacting / separating with a front surface of the main body is provided at both left and right ends of the door, and the controller outputs an output signal of the opening / closing detection switch. The opening / closing device for a double door according to claim 1, wherein the output of the drive signal is stopped when is changed. 3. An opening / closing device for a double door according to claim 1, further comprising a friction clutch for transmitting a torque of a predetermined value or less between the latch plate and the motor.