JPH07113510B2 - Door opener - Google Patents

Description

Description: TECHNICAL FIELD The present invention mainly relates to a door opening / closing device for a refrigerator, and more particularly to a device capable of opening / closing the door from any left or right side.

<Prior Art> Generally, the door of a refrigerator can be opened and closed only from one of the left and right sides, and at the time of manufacturing, it was determined to be either so-called right opening or left opening.

Therefore, at the time of purchase, the user has to select either the right-opening or the left-opening in consideration of the place of use. Also, if the place of the refrigerator is changed after the purchase by changing the design of the kitchen, the door may hit the wall, making it difficult to open or close, or the place of the refrigerator may be limited. In addition, when used by a large number of people, there is also the inconvenience that it becomes difficult for the person with a different dominant arm to open and close.

In order to eliminate such inconvenience, a large number of door opening / closing devices, so-called double-opening devices, which can be opened / closed from any left and right sides have been conventionally proposed.

18 and 19 show a typical double-opening device of the related art.

The apparatus of FIG. 18 are each hinge pin 2 ₀ on the left and right positions of the upper and lower both parts of the door 1 _0, provided with a ... freely vertically projecting, door 1
_On the part of the main body 30 corresponding to the upper and lower parts of ₀ , the hinge pin 2
The bearing recess 4 _{0 0} provided by the rotation of the operating handle 5 ₀ provided in the door 1 _0, one of the left and right hinge pins 2 ₀ come out of the bearing recess 4 ₀ corresponding allows opening of the door 1 ₀ It was done like this.

The device of Figure 19, the main body 6 ₀ and the intermediate frame member 8 ₀ in which a center portion thereof is open between the door 7 ₀ provided, pivotally right and left one side of the intermediate frame member 8 ₀ the body 6 ₀ wear and, in which the other side of the intermediate frame member 8 ₀ pivoted to the door 7 _0.

However, in the case of the device of FIG. 18, the operating handle 5 ₀ movable for switching between right-opening and left-opening is required, not only the structure becomes complicated, when an infant is confined in the main body 3 ₀ , since it is not possible to open the door 1 ₀ from the inside,
There is a risk of a containment accident. Also, for incorporating an interlocking mechanism between the internal operating handle 5 ₀ and hinge pin 2 ₀ doors 1 _0, the heat insulating performance is lowered door, there is a problem that.

Further, the apparatus of Figure 19, the packing body 6 ₀ and the intermediate frame
Between 8 ₀ and becomes the intermediate frame member 8 ₀ and the door 7 ₀ required during packing becomes double, or thicker the thickness of the entire door section, the heat insulating performance may become worse drawback There is.

<Objects of the Invention> The present invention has been made in view of the above problems, and does not require a movable operation handle, and opens and closes a door from any left or right side without an operation such as turning the handle. It is an object of the present invention to provide a door opening / closing device that is capable of achieving a high heat insulation performance with a simple structure.

<Structure of the Invention> In order to achieve the above object, the present invention has hinge pins projecting from the left and right ends of either one of the door or the main body to which the door is attached, while the hinge pin opens the door on the other side. A fixing plate having an engaging groove that can be engaged and disengaged from the side is provided, and the left and right ends of the fixing plate are engaged with the hinge pin in a disengageable manner by latch grooves that open to the outer diameter side. A latch plate for restraining the hinge pin in the engaging groove is rotatably attached, and between the latch plates, the rotation of one latch plate in the restraint release direction is linked to the rotation of the other latch plate. The door is opened / closed by providing a connecting member for releasing the rotation-prevented state of the other latch plate in cooperation with the rotation of the one latch plate in the direction opposite to the constraint release direction. Configured the device.

In the linking portion between the latch plate and the connecting member, one of the latch plate or the connecting member has a groove portion in which the guide portion and the stopper portion are continuously formed in a bent shape,
On the other hand, there is provided a linking body that fits in the groove portion and restricts rotation of the latch plate.

Alternatively, the connecting member is composed of a pair of links pivotally attached to the fixing plate in the vicinity of the left and right latch plates, and a connecting link for connecting one end portions of these links to each other. A pin for restricting rotation of the latch plate is provided in a protruding manner, and each latch plate is provided with a groove in which a guide portion with which the pin engages and a stopper portion are formed in a bent shape.

Alternatively, the connecting member is composed of a pair of connecting levers,
One end of each connecting lever is pivotally attached to the peripheral part of the left and right latch plates, and the other end of each connecting lever is provided with a lock pin that is guided by a slide guide groove formed in the fixed plate. Then, the lock pin is engaged with the lock groove formed in each latch plate in a disengageable manner.

<Examples> Hereinafter, the present invention will be described in detail based on Examples shown in the drawings.

First Embodiment FIGS. 1 to 5 relate to the first embodiment, FIG. 1 is a plan view in a closed state of a door, FIG. 2 is a plan view in an open state, FIG. 3 is a front view, and FIG. FIG. 5 is an exploded perspective view, and FIG. 5 is an external perspective view of a refrigerator equipped with this door opening / closing device.

As shown in these figures, the door opening / closing device of this embodiment is provided with a pair of left and right hinge pins protruding from both left and right parts of the door 1.
2a, 2b, a fixed plate 4 provided on the main body 3 (shown in FIG. 5) so as to face the upper and lower portions of the door 1, and a pair of left and right latch plates rotatably attached to the left and right positions of the fixed plate 4. 5a, 5b
And a connecting member 6 provided between the pair of latch plates 5a and 5b.

The fixed plate 4 has engagement grooves 7a and 7b formed on both left and right portions thereof. These engagement grooves 7a, 7b are open to the open side of the door 1 (lower side in FIGS. 1 and 2),
The hinge pins 2a, 2b on the corresponding side can be fitted and engaged from the open side of the door 1.

The latch plates 5a, 5b restrain the hinge pins 2a, 2b engaged with the engagement grooves 7a, 7b of the fixed plate 4 in the inner portions of the engagement grooves 7a, 7b, and the hinge pins 2a, 2b can be disengaged. The latch grooves 8a and 8b are opened on the outer diameter side. These latch plates 5a and 5b are
It is rotatably attached to the fixed plate 4 by rotating shafts 9a and 9b at the inner positions of 7a and 7b, and as shown in FIG.
At the angular position where a and 8b are facing left and right, the latch groove
8a, 8b intersects with the engagement grooves 7a, 7b to constrain the hinge pins 2a, 2b within the intersection, and the constraint release direction from that angular position by a certain angle (clockwise if the latch plate 5a on the right side of the figure, By rotating in the counterclockwise direction on the left latch plate 5b), the openings of the latch grooves 8a, 8b are aligned with the openings of the engaging grooves 7a, 7b, and the hinge pins 2a, 2b come out of the engaging grooves 7a, 7b. Allow exit.

The coupling member 6 is in a rotation blocking state in which the latch plate 5a (5b) is linked with the rotation of the latch plate 5a (5b) in the restraint release direction to block the rotation of the other latch plate 5b (5a), and the one latch plate 5a (5b) Is to release the rotation blocking state of the other latch plate 5b (5a) in association with the rotation in the direction opposite to the restraint release direction, and is composed of one lever. In the intermediate position, it is pivotally attached to the fixed plate 4 by the support shaft 10 so as to be freely movable. Grooves 11a and 11b are provided at both ends of the connecting member 6, respectively.
Are formed in the groove portions 11a and 11b.
The linking bodies 12a and 12b protruding from the 5b are engaged. Groove 11
Reference numerals 11a ₁ and 11b are a and 11b, which are bent in a substantially L-shape and extend in a direction away from the support shaft 10 of the connecting member 6.
₁ and stopper portions 11a ₂ and 11b ₂ provided along an arc centered on the support shaft 10.

In FIG. 5, reference numeral 13 is a handle of the door 1.

Next, the operation of the above configuration will be described.

As shown in FIG. 1, the latch grooves 8a, 8b of the respective latch plates 5a, 5b
Are facing outward left and right, the latch grooves 8a, 8b intersect the engaging grooves 7a, 7b, and the hinge pin 2
The a and 2b are restrained, and as a result, the door 1 is held in the closed state.

Here, when the door 1 is opened from the right, the handle 13 on the right side of the door 1 is pulled. Then, the hinge pin 2a on the right side is pulled in the direction of coming out of the engagement groove 7a, and accordingly, the rotational force in the clockwise direction, that is, the restraint releasing direction acts on the latch plate 5a on the right side. At this time, the link body 12a provided on the latch plate 5a
Are located at the corners of the groove 11a and can slide the guide 11a ₁ . When the linking body 12a slides along the guide portion 11a ₁ , the latch plate 5a rotates clockwise as shown in FIG. When the latch plate 5a rotates by a certain angle, the opening of the latch groove 8a coincides with the opening of the engaging groove 7a. As a result, the right hinge pin 2a can be pulled out from the engagement groove 7a.

On the other hand, the linking body 12a of the right latch plate 5a is
The guide portion 11a ₁ of with the rotation groove portion 11a by sliding movement of the connecting member 6 swings in the clockwise direction. By swinging the connecting member 6, the other latch plate, that is, the left latch plate
The 5b side, connecting the ends of the member 6 is to move away from the latch plate 5b, fitted is the linkage 12b in the stopper portion 11b ₂ of the groove 11b of the end portion. This prevents the latch plate 5b from rotating in either direction. Latch plate
By blocking the rotation of 5b, the left hinge pin 2b is maintained in the restrained state.

In this way, the left hinge pin 2b is constrained in the inner part of the engagement groove 7b, and the right hinge pin 2a can be pulled out from the engagement groove 7a. Will be done.

When the door 1 is opened from the right side, as described above, the link body 12b of the left latch plate 5b causes the groove portion 1 of the connecting member 6 to move.
Since to prevent rotation of the latch plate 5b fitted into the stopper portion 11b ₂ 1b, the left side of the door 1 will be smoothly securely locked.

In the refrigerator, the lower side of the door 1 is always subjected to a force in the direction of opening the door 1 on both sides of the door 1 due to the load of food or the like stored in the internal pocket of the door 1, and An elastic packing is provided to prevent cold air from leaking to the outside from the gap with the main body, and the repulsive force of this packing constantly exerts a force that tries to pop out to the outside of the entire door 1. In the example, the side opposite to the open side of the door 1 is smoothly and surely locked as described above, which is extremely effective.

When closing the door 1 opened as described above, the right side portion of the door 1 may be pushed in the closing direction. With the closing movement of the door 1, the right hinge pin 2a fits into the corresponding engaging groove 7a, but at the same time, the hinge pin 2a is received by the latch groove 8a of the latch plate 5a and is moved counterclockwise by the latch plate 5a. Gives rotational force. At this time, there linkage member 12a is at the tip of the guide portion 11a ₁ of the groove 11a, the rotation since the latch plate 5a is in a state of capable of rotating in the counterclockwise direction, the counterclockwise direction by the rotational force applying from the hinge pin 2a Then, the state shown in FIG. 1 is restored, and the hinge pin 2a is again restrained in the inner portion of the engaging groove 7a.

Further, as the latch plate 5a rotates counterclockwise, the linkage member 12
Since a returns to the bent corner of the groove 11a, the connecting member 6 also
Return to the neutral position in the figure.

When the door 1 is opened / closed from the left side, the door 1 is opened / closed by the operation opposite to the left / right, and thus the description of the operation is omitted.

If both the left and right parts of the door 1 are pulled in the opening direction at the same time, the hinge pins 2a, 2b on both the left and right sides, the latch plates 5a, 5b, the link members 12a, 12
The swinging force in the clockwise direction and the swinging force in the counterclockwise direction act on the connecting member 6 via b and the grooves 11a, 11b,
The connecting member 6 does not swing in either direction. for that reason,
Rotation of each latch plate 5a, 5b is blocked, and as a result, each hinge pin 2a, 2b does not come out of the engaging groove 7a, 7b, and the door 1
Remain closed.

When it is desired to remove the door 1, one of the left and right sides of the door 1 is opened, and then the latch plate 5a (5b) on the opened side is rotated by a rod body such as a driver in a direction opposite to the restraint releasing direction. When the latch plate 5a (5b) on the opened side rotates in the same direction, the rotation blocking state of the other latch plate 5b (5a) is released, and the engagement groove 7b (7a) of the other hinge pin 2b (2a) is released. It is possible to escape from.

In the above example, the connecting member 6 is pivotally attached to the fixed plate 4 at a position on the rear side of the rotation shafts 9a, 9b of the latch plates 5a, 5b, but the connecting member 6 is on the front side (door 1 May be pivotally attached to the fixing plate 4 at a position on the side where is opened.

Second Embodiment FIGS. 6 to 8 relate to a second embodiment, FIG. 6 is a plan view in a closed state of the door, FIG. 7 is a plan view in an open state, and FIG. 8 is an exploded perspective view. is there.

The door opening / closing device of this embodiment includes a pair of left and right hinge pins 2a and 2b projectingly provided on both left and right parts of the door 1, a fixed plate 4 provided on the main body 3, and a left and right position of the fixed plate 4. And a pair of left and right latch plates 5a, 5b attached to the fixed plate 4, and the fixed plate 4 is provided with engagement grooves 7a, 7b with which the hinge pins 2a, 2b can be detachably engaged from the opening side of the door 1. Latch plate 5a, 5b
This is similar to the device of the first embodiment in that the latch pins 8a and 8b are provided with the latch grooves 8a and 8b with which the hinge pins 2a and 2b are engageably and disengageably engaged from the outer diameter side. The same parts as those in the first embodiment are designated by the reference numerals and detailed description thereof will be omitted.

The device of this embodiment is different from the device of the first embodiment in that the latch plate 5a (5b) is linked with the rotation of the latch plate 5a (5b) in the restraint releasing direction and the other latch plate 5b (5a) is prevented from rotating. Member 15
Is a pair of L-shaped links 15a and 15b and these L-shaped links 15
That is, it is composed of a connecting link 15c that connects the one ends of a and 15b.

The L-shaped links 15a and 15b are pivotally attached to the fixed plate 4 by pivots 16 in the vicinity of the left and right latch plates 5a and 5b, respectively. Pins 17a and 17b are provided at the free ends of the L-shaped links 15a and 15b (the ends on the opposite side to the ends connected to the connecting links 15c). On the other hand, on each latch plate 5a, 5b, the pin 17
Grooves 18a and 18b with which a and 17b are engaged are formed. Groove 18a, 18
b is a substantially L-shaped bent shape, and pivots 16 of the L-shaped links 15a and 15b away from the rotation shafts 9a and 9b of the latch plates 5a and 5b.
Guides 18a ₁ and 18b ₁ extended toward the side and L-shaped links 15a 1
It comprises stopper portions 18a ₂ and 18b ₂ provided along an arc centered on the pivot 16 of 5b.

In the above structure, when the door 1 is opened from the right, as shown in FIG. 7, the right hinge pin 2a is pulled out in the engaging groove 7a, and the right latch plate 5a is pulled in the clockwise direction, that is, the restraint releasing direction. Rotate to. As the latch plate 5a rotates, the groove
Since pin 18a is displaced clockwise with respect to pin 17a, pin 17
The a slides relatively along the guide portion 18a ₁ of the groove 18a and is pushed to the outer diameter side of the latch plate 5a. with this,
The L-shaped link 15a swings counterclockwise, and the other (left-side) L-shaped link 15b swings in the same direction via the connecting link 15c. On the side of the left latch plate 5b, the pin 17b provided on the L-shaped link 15b fits into the stopper portion 18b ₂ of the groove 18b.
As a result, the rotation of the latch plate 5b is blocked.

When the door 1 is opened from the left side, the door is opened by the operation opposite to the above.

In this second embodiment, the grooves 18a, 18b of the latch plates 5a, 5b are
Is bent into a substantially L shape, but the grooves 18a and 18b are
It may have any shape as long as it has the guide portions 18a ₁ and 18b ₁ and the stopper portions 18a ₂ and 18b _2, and may have a shape that is bent into a substantially “V” shape. In the V-shaped grooves 18a and 18b, the stopper portions 18a ₂ and 18b ₂ are arcuate shapes extending toward the outer diameter side of the latch plates 5a and 5b around the pivot 16 of the L-shaped links 15a and 15b, and The portions 18a ₁ and 18b ₁ have a shape that extends obliquely from the inner ends of the stopper portions 18a ₂ and 18b ₂ so as to approach the rotation shafts 9a and 9b of the latch plates 5a and 5b, and the specific shape thereof is It has the same shape as the grooves 18a and 18b in the third embodiment described later.

In this way, when the grooves 18a, 18b are formed in a V shape, the swinging direction of the L-shaped links 15a, 15b when the latch plates 5a, 5b rotate becomes opposite to that of the illustrated second embodiment.

Third Embodiment FIGS. 9 to 11 relate to a third embodiment, FIG. 9 is a plan view in a closed state of the door, FIG. 10 is a plan view in an open state, and FIG. 11 is an exploded perspective view. .

The third embodiment is a modification of the second embodiment described above, and parts corresponding to those in the second embodiment are designated by the same reference numerals.

In this embodiment, hinge pins protruding from both left and right parts of the door 1 are used.
2a, 2b, a fixed plate 4 having engagement grooves 7a, 7b, and a latch groove 8
a pair of left and right latch plates 5a, 5b having a and 8b, and a connecting member 15 for preventing rotation of the other latch plate 5b (5a) in cooperation with rotation of one latch plate 5a (5b) in the restraint release direction, Equipped with
Further, the connecting member 15 is the same as that of the second embodiment in that the connecting member 15 is composed of a pair of L-shaped links 15a and 15b and a connecting link 15c that connects one end portions of these L-shaped links 15a and 15b. .

This embodiment is different from the second embodiment in that the L-shaped link 15a,
15b is pivotally attached to the fixed plate 4 on the front side, and a connection link 15c is provided on the back side of the fixed plate 4, and both L are connected by this connection link 15c.
That is, the shape links 15a and 15b are connected to each other.

Further, in each of the latch plates 5a, 5b of this embodiment, as in the second embodiment, grooves 18a, 18b composed of guide portions 18a ₁ , 18b ₁ and stopper portions 18a ₂ , 18b ₂ are formed. But this groove 18a, 18b
Is a shape that is bent into a substantially "V" shape. The stopper portions 18a ₂ and 18b ₂ have an arc shape centering on the pivot 16 of the L-shaped links 15a and 15b, and the guide portions 18a ₁ and 18b ₁ are latched from one end of the stopper portions 18a ₂ and 18b _2. The plates 5a and 5b are obliquely extended so as to approach the rotation shafts 9a and 9b.

The operation of the above-mentioned configuration is the same as that of the second embodiment, so the explanation is omitted.

Fourth Embodiment FIGS. 12 to 14 relate to a fourth embodiment, FIG. 12 is a plan view in a closed state of the door, FIG. 13 is a plan view in an open state, and FIG. 14 is an exploded perspective view. .

The door opening / closing device of this embodiment includes a pair of left and right hinge pins 2a and 2b projectingly provided on both left and right parts of the door 1, a fixed plate 4 provided on the main body 3, and a left and right position of the fixed plate 4. And a pair of left and right latch plates 5a, 5b attached to the fixed plate 4, and the fixed plate 4 is provided with engagement grooves 7a, 7b with which the hinge pins 2a, 2b can be detachably engaged from the opening side of the door 1. Latch plate 5a, 5b
This is similar to the device of the first embodiment in that the latch pins 8a and 8b are provided with the latch grooves 8a and 8b with which the hinge pins 2a and 2b are engageably and disengageably engaged from the outer diameter side. The same parts as those in the first embodiment are designated by the same reference numerals and detailed description thereof will be omitted.

The device of this embodiment is different from the device of the first embodiment in that the latch plate 5a (5b) is linked with the rotation of the latch plate 5a (5b) in the restraint releasing direction and the other latch plate 5b (5a) is prevented from rotating. Member 19
Is composed of a pair of connecting levers 19a and 19b.

Of the two connecting levers 19a and 19b, the latch plate 5
The left end of the one connecting lever 19a located above a and 5b is pivotally attached to the peripheral part of the left latch plate 5b, and the lock pin 20a is projectingly provided at the right end. The lock pin 20a is
It is fitted in a slide guide groove 21a formed in the fixed plate 4 and guided by the slide guide groove 21a in the radial direction of the latch plate 5a. Also, this slide guide groove 21
Corresponding to a, the latch plate 5a is formed with a lock groove 22a that opens to the outer diameter side. This lock groove 22a is a latch plate
When 5a is at the restraining angle position of the hinge pin 2a, it is adapted to match the slide guide groove 21a.

The other, that is, the connecting lever 19b located below the latch plates 5a, 5b in the figure has a structure that is left-right reversed from the connecting lever 19a described above, with the right end pivotally attached to the peripheral part of the right latch plate 5a, and the left end. A lock pin 20b is protrudingly provided on the part. A slide guide groove 21b for guiding the lock pin 20b is formed on the left side of the fixed plate 4. Also, the left latch plate 5b
A lock groove 22b that is open to the outer diameter side is formed in the.

In the above configuration, when the door 1 is closed, as shown in FIG. 9, the lock pins 20a, 2 of the connecting levers 19a, 19b are locked.
0b is out of the lock grooves 22a, 22b, and each latch plate 5a,
5b can rotate.

Here, when the door 1 is opened from the right, as shown in FIG. 10, the right hinge pin 2a is pulled in the direction of coming out of the engaging groove 7a, and the right latch plate 5a is rotated in the clockwise direction, that is, the restraint releasing direction. To do. With the rotation of the latch plate 5a, the lower connecting lever 19b is pulled to the right side, and the lock pin 20b protruding from the left end portion of the connecting lever 19b is fitted into the lock groove 22b of the left latch plate 5b. Put in. As a result, the rotation of the left latch plate 5b is blocked. In this case, the upper connecting lever 19a is not displaced regardless of the rotation of the latch plate 5a on the right side and maintains the original state because the lock pin 20a is at the position out of the lock groove 22a.

When the door 1 is opened from the left side, the door is opened by the operation opposite to the above.

Fifth Embodiment FIGS. 15 to 17 relate to the fifth embodiment, FIG. 15 is a plan view of a door in a closed state, FIG. 16 is a plan view of an open state, and FIG. 17 is an exploded perspective view. .

The fifth embodiment is a modification of the above-described fourth embodiment, and the portions corresponding to those of the fourth embodiment are designated by the same reference numerals.

In this embodiment, hinge pins protruding from both left and right parts of the door 1 are used.
2a, 2b, a fixed plate 4 having engagement grooves 7a, 7b, and a latch groove 8
a pair of left and right latch plates 5a, 5b having a and 8b, and a connecting member 19 for interlocking with the rotation of the one latch plate 5a (5b) in the restraint release direction and for preventing the other latch plate 5b (5a) from rotating. Equipped with
The connecting member 19 is the same as the fourth embodiment in that the connecting member 19 is composed of a pair of connecting levers 19a and 19b.

This embodiment differs from the fourth embodiment in that two connecting levers 19a, 19b are provided in a cross shape, and the slide guide grooves 21a, 21b of the fixed plate 4 and the lock grooves 22a of the latch plates 5a, 5b are provided. ,
22b is arranged near the center of the fixed plate 4.

The operation of the above-mentioned configuration is the same as that of the fourth embodiment, and the explanation is omitted.

Other Embodiments In each of the above embodiments, the door 1 is provided with the hinge pins 2a and 2b,
Although the fixing plate 4 is provided on the main body 3, conversely, the hinge pins 2a and 2b may be provided on the main body 3 and the fixing plate 4 may be provided on the door 1.

Further, the fixing plate 4 does not necessarily have to be composed of one plate body, and may be divided into a left part and a right part, and the latch plates 5a, 5b and the connecting members 6, 15, 19 may be provided. It may be configured by two plate bodies sandwiched from above and below.

<Effects of the Invention> As described above, according to the present invention, the door can be opened by simply pulling the left or right side of the door, so that it is not necessary to rotate the handle when opening or closing the door. The design of the door handle attachment position etc. can be freely decided.

Further, since the door can be opened from the inside of the refrigerator or the like, there is no risk of a trapping accident.

Further, the device of the present invention can be incorporated in the upper and lower edges of the door or the corresponding main body portion, and since it is not necessary to provide any mechanism inside the door, the internal structure of the door remains the same. Well, the heat insulation performance is not impaired.

Moreover, in the present invention, the rotation of the latch plate for restraining the hinge pin in the engaging groove is prevented and released by the groove portion provided in the latch plate or the connecting member and the linking body fitted thereto, so that the door is opened. The side opposite to the side can be smoothly and reliably locked, and the door can be smoothly opened and closed.

In particular, in the refrigerator, since a force is applied in the direction of opening the door by the load of the food stored in the inner pocket of the door or the elastic force of the cold air sealing packing, the present invention capable of a smooth and reliable lock is provided. Very suitable for refrigerators.

[Brief description of drawings]

1 to 5 relate to a first embodiment of the present invention.
The figure shows a plan view of the door in a closed state, FIG. 2 shows a plan view of the door in an open state, FIG. 3 shows a front view, and FIG. 4 shows an exploded perspective view.
FIG. 5 is an external perspective view of a refrigerator equipped with this door opening / closing device. 6 to 8 relate to a second embodiment of the present invention,
FIG. 7 is a plan view in a closed state of the door, FIG. 7 is a plan view in an opened state, and FIG. 8 is an exploded perspective view. 9 to 11 relate to the third embodiment of the present invention,
The figure is a plan view in the closed state of the door, FIG. 10 is a plan view in the open state, and FIG. 11 is an exploded perspective view. 12 to 14 relate to a fourth embodiment of the present invention,
The figure is a plan view in the closed state of the door, FIG. 13 is a plan view in the open state, and FIG. 14 is an exploded perspective view. 15 to 17 relate to a fifth embodiment of the present invention,
The drawing is a plan view in the closed state of the door, FIG. 16 is a plan view in the open state, and FIG. 17 is an exploded perspective view. FIG. 18 is a sectional view of a conventional example, and FIG. 19 is a perspective view of another conventional example. 1 ... Door, 2a, 2b ... Hinge pin, 3 ... Main body, 4 ...
Fixed plate, 5a, 5b …… Latch plate, 6 …… Coupling member, 7a, 7b…
… Engagement grooves, 8a, 8b …… Latch grooves. 15 ... Connection member, 15a, 15b ... L-shaped link, 15c ... Connection link, 17a, 17b ... Pin, 18a, 18b ... Groove. 19 ... Coupling member, 19a, 19b ... Coupling lever, 20a, 20b ...
Lock pin, 21a, 21b …… Slide guide groove, 22a, 22b ……
Lock groove.

Claims (3)

[Claims] Claims: 1. A hinge pin is provided at both left and right ends of a door or a main body to which the door is attached, and the other hinge pin is engageable with the hinge pin from the open side of the door. A latch plate is provided with a fixing plate having a groove, and the left and right ends of the fixing plate are engaged with the hinge pin in a detachable manner by latch grooves open to the outer diameter side to restrain the hinge pin in the engaging groove. A plate is rotatably mounted, and between these latch plates, the other latch plate is linked to the rotation of the one latch plate in the restraint release direction to bring the other latch plate into a rotation blocking state in which the rotation is blocked, and the one latch plate is locked. An opening / closing device having a connecting member for releasing the rotation blocking state of the other latch plate in association with rotation of the plate in a direction opposite to the restraint releasing direction, wherein a linking portion between the latch plate and the connecting member is provided. , Latch plate Alternatively, one of the connecting members has a groove portion in which the guide portion and the stopper portion are continuously formed in a bent shape,
On the other hand, a door opening / closing device characterized in that a linking body that is fitted into the groove portion and restricts rotation of the latch plate is provided. 2. The connecting member comprises a pair of links pivotally attached to a fixed plate near the left and right latch plates, and a connecting link for connecting one ends of these links to each other. A pin for restricting the rotation of the latch plate is provided at the other end, while each latch plate is provided with a groove in which a guide portion with which the pin engages and a stopper portion are formed in a bent shape. The door opening / closing device according to claim 1. 3. The connecting member comprises a pair of connecting levers, one end of each connecting lever is pivotally attached to a peripheral portion of a latch plate on the left and right sides different from each other, and fixed to the other end of each connecting lever. A lock pin guided by a slide guide groove formed on the other latch plate side of the plate is provided in a protruding manner, and each latch plate is provided with a lock groove into which the lock pin in the slide guide groove is detachably engaged. The door opening / closing device according to claim 1, which is formed.