JPH0375479A - Right-and-left opening door device - Google Patents

Abstract

PURPOSE:To prevent a gap from generating between doors and a box by rotat ing coupling rods while sliding a locking pin in response to the movement of a latch upon opening or closing of a door from left or right side for separating a hinge pin from the latch. CONSTITUTION:When a handle 35 is pulled in a state that a door is closed, a hinge pin 23 rotates a latch 26 against the energizing force of a toggle spring 29 at a supporting shaft 27 as a center. In this case, a locking pin 31 rotates a coupling rod 32 clockwise at a supporting shaft 33 as a center while sliding the inner face of an operating passage 34a, and a locking passage 34b' is intro duced to the periphery of the pin 31'. When the handle 35 is further pulled, the pin 23 is separated from the latch 23, the pin 31 finishes to rotate the rod 32 in this state to be disposed at the end of the passage 34a. In this case, an engaging pin 28 of the spring 29 is passed through a maximum energizing point, and its energizing direction becomes reverse. Thus, no gap is generated between the door and a cabinet to eliminate leakage of chilled gas to prevent its perfor mance from decreasing.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a door opening/closing device for a refrigerator or the like, and particularly to a double door device.

Conventional technology In recent years, as lifestyles have become more diverse and individualized, the demand for double-door refrigerators, for example, has rapidly increased, and there is a particularly strong demand for refrigerators that operate reliably and are highly reliable. It has become.

As a conventional technique, there is a double door device as shown in Japanese Patent Publication No. 48-44434, for example.

An example of the above-mentioned conventional double door device will be described below with reference to the drawings.

Figure 3 is a top view of a refrigerator with a conventional double door device when the door is closed, Figure 4 is a top view of the refrigerator with the door half open at 9 o'clock, and Figure 6 is a top view of the refrigerator with the door open. shows.

Reference numeral 1 denotes an opening/closing lever which is rotatably attached to a box 2 of a refrigerator or the like by means of a fulcrum shaft 3, one end of which is shaped to embrace a shaft 6 attached to protrude from the door 4, and the other end of which is a hook-shaped part. 6, and a sliding shaft 7 is attached to it so that it can slide in the groove 9 of the loft creper 8.

1o is a spring, one end of which is hooked to a hook bin 11 attached to the opening/closing lever 1, and the other end hooked to a hook pin 12 attached to the box 2.

The box 2 has a υ-shaped groove 13 through which the shaft 6 can go in and out.

14 is a safety lever, which has a groove 16 and a hooked part 1;
6 and a pin 17 is attached thereto, and is attached to the box 2 by a pin 18 so as to be slidable in left and right directions, and is constantly pushed in the direction of the groove 13 of the box 2 by a spring 19.

Note that 1' to 19' have the same purpose and function as 1 to 19, but in the case of movable parts, the directions are opposite. The same lever mechanism is also provided at the bottom of the box 2.

The operation of the double door device configured as described above will be described below with respect to the upper part of the box.

Figure 3 shows the door closed and the handle 20 in this state.
When pulled, the shaft 5 rotates the lever 1 counterclockwise around the fulcrum shaft 3, extends the spring 1o, and slides the sliding shaft 7 along the groove 9 of the lock lever 8 to the left in FIG. As the box 2 moves toward the groove 131, the shaft 5 eventually pushes the safety lever 14, and the state at this time is shown in FIG.

When the safety lever 14 is pushed by the shaft 6, the spring 19 is bent so that the hook 16 of the safety lever 14 and the hook 6 of the opening/closing lever 1 are easily hooked onto each other.

At this time, since the spring 1o passes over the fulcrum shaft 3, the opening/closing lever 1 is rotated counterclockwise by the spring 10.

When the handle 20 is further pulled, the shaft 6 of the door 4 completely comes out of the groove 13 of the box 2, as shown in FIG.

In this state, the safety lever 14 returns to its normal position due to the force of the spring 19, the lock 6 of the opening/closing lever 1 and the lock 16 of the safety lever 14 are engaged, the rotation of the opening/closing lever is stopped, and the sliding shaft of the opening/closing lever is stopped. 7 and the sliding shaft 7 of the opening/closing lever 1'
The line connecting `` exceeds the fulcrum shaft 3 by a very small amount, and the sliding shirt 7, 7'' moves in the groove 9.9' of the loft creper 8 to the end opposite to when the door is closed. Furthermore, the lock lever
The grooves 9 and 9' of 8 rotate when either the opening/closing lever 1 or 1' hits the safety lever 14 or 14' and the lock part 6
, 16 or 6', 16' are rotated until they are hooked, the sliding shafts 7 and 7' have grooves long enough to move through the grooves 9 and 9' at both ends of the lock lever 80, as shown in FIG. become.

Therefore, the door 4 rotates around the shaft 6' attached to the shaft 84, and when the shaft 6' tries to come out along the groove 13', when a force is applied in the direction of pulling the lock lever 8, the opening/closing lever is 1. If the line connecting the sliding shafts 7 and 7' attached to 1' exceeds the fulcrum shaft 3 by an extremely small amount, the opening/closing lever 1 will receive a counterclockwise rotating force, which is applied to the safety lever. 14 to block the rotation.

Furthermore, since the lower part of the box 2 is equipped with exactly the same mechanism as the upper part, by pulling the door handle 2o, the same effect will be performed at the lower part of the box.

Next, when closing the door, and explaining the upper part of the box, when you press the handle 2o and close the door 4, the shaft 6 attached to the door enters the groove 13 of the box, and the safety lever 14
Press to bend the spring 19, remove the lock 16 of the safety lever 14 and the lock 6 of the opening/closing lever 1, and then remove the shaft 6.
When it enters the groove 13, the shaft 5 pushes the opening/closing lever 1 and rotates it clockwise, causing the sliding shaft 7 to slide in the groove 9 toward the center of the lock lever 8. Eventually spring 1o
When it passes over the fulcrum shaft a, the force of the spring 10 applies a clockwise rotational force to the opening/closing lever 1, so that the opening/closing lever 1 pulls the shaft 6 into the groove 13 and the door is safely closed.

In this state, the sliding shaft 7.7 moves in the grooves 9, 9' toward the center of the lock lever 8, as shown in FIG.

A similar action also takes place in the lower part of the box 2.

Next, the operation occurs when the handle 20' is pulled and the door 4 is opened on the opposite side, but the operation is only that the rotation and movement direction of the lever etc. are reversed from when the handle 20 is pulled. It is clear from the drawings that the action is exactly the same, so the explanation will be omitted.If the handles 20 and 20' are pulled at the same time, the opening/closing lever 1.1' will only rotate halfway and the lock lever 8
5 and 6' are grooves 13° and 13'.
and therefore the door cannot be opened in either direction.

Problems to be Solved by the Invention However, with the above configuration, when both door handles are pulled at the same time or when the refrigerator is tilted forward, the sliding shaft attached to each opening/closing lever locks. In order to rotate until they abut each end of the groove, both shafts projecting from the door move outward, creating a gap between the door and the box. For this reason, in the case of refrigerators, cold air leaks inside the refrigerator, reducing performance.

Also, if you pull the handle on the opposite side with the door open, the open safety lever will receive a counterclockwise force, so it is necessary to provide a highly reliable safety lever, which increases the installation space and weight. There was also the issue of increased costs.

In view of the above problems, the present invention provides a highly reliable double door device that does not create a gap between the door and the box, has a small installation space, is lightweight, and is low cost.

Means for Solving the Problems In order to solve the above problems, the double door device of the present invention includes a pair of hinge pins attached to both ends of the upper part of the cabinet and protruding downward from the front of the cabinet, and a pair of hinge pins provided at both ends of the upper surface of the door to hold the hinge pins. and a pair of latches for reciprocating the hinge pin in a detachable manner, a lock pin protruding from the latches, and a support shaft positioned between the pair of latches so that both ends cover the pair of latches. and a connecting rod rotatable around the center, and each of the connecting rods has a hinge pin at each end that responds to the movement of the latch accompanying the opening/closing movement from either the left or right side of the door, which causes separation from the latch. and an operating passage formed to rotate the connecting rod while sliding the lock pin, and an operating path formed around the lock pin in response to the rotation of the connecting rod when the door on the opposite side is opened. In addition, the door opening/closing structure is provided with a lock passage formed to prevent movement of the lock pin, and the same mechanism as described above is also provided at the lower part of the door opening/closing structure.

EXAMPLE Hereinafter, a double door device according to an example of the present invention will be described with reference to the drawings.

FIG. 1 shows a top view of the refrigerator with the door closed, and FIG. 2 shows a top view of the refrigerator with the door open.

Reference numeral 21 denotes a refrigerator cabinet, and 22 denotes a hinge attached to protrude from the front of the cabinet, with a hinge pin 23 protruding downward formed at the tip. Reference numeral 24 denotes a door, and a latch 2e is rotatably attached to the upper surface 26 of the door on a support shaft 27. One end of the latch 26 is the hinge pin 23
The retaining pin 28 is attached to the other end of the retaining portion 2 of the toggle spring 29.
9& is hooked. The other engaging portion 2eb of the toggle spring is hooked on a second retaining pin 30 attached to the upper surface 26, and applies a clockwise biasing force to the hinge 26 about the support shaft 27. ing.

Further, 31 is a lock pin attached to the latch 26 in a protruding manner. Reference numeral 32 denotes a connecting rod which is rotatably attached to a central support shaft 33, and at its end there is an operating passage 34a in which a lock pin 31 can freely slide, and a connecting rod around the lock bottle 31 that is connected to this operating passage 34a. A lock passage 36b is formed that can freely go in and out.

36 is a handle attached to the door 24.

22' to 31', 34a', 34b', 35 are 1 to 22
It has the same purpose and function as , but the movable parts are in the opposite direction.

The lock pin 31, 31' and the central support shaft 33 are approximately on a straight line.

The same mechanism described above is also provided at the lower part of the cabinet 21 and the lower surface of the door 24.

The operation of the humidifier configured as described above will be described below.

Figure 1 shows the door closed, and from this state the handle 35
When pulled, the hinge pin 23 rotates the latch 26 about the support shaft 27 while resisting the biasing force of the toggle spring 29. At this time, the lock pin 31 rotates the connecting rod 32 clockwise about the central support shaft 33 while sliding on the inner surface of the operating passage 34a.

With this movement, the lock passage 34b' is moved to the lock pin 31'.
come into the surrounding area.

When the handle 36 is further pulled, the hinge pin 2a is released from the latch 23, as shown in FIG.

In this state, the lock pin 31 has finished rotating the connecting rod 32 and is located at the end of the operating passage 34a. At this time, the engagement pin 28 of the toggle spring 29 passes through the maximum biasing force point, and the biasing direction is reversed, applying a biasing force in the counterclockwise direction to the latch 26.

Further, the lock passage 34b' penetrates farthest into the lock pin 31'.

Therefore, when the handle 36' is pulled at this time, even if the hinge pin 23' tries to release the latch 26' and applies a clockwise force to the latch 26' around the support shaft 27', the lock pin 31 ' is in contact with the inner surface of the lock passage 34b' and is also in line with the central support shaft 33, so the connecting rod cannot be rotated, and even if you try to push the connecting rod 32 to the right, the central support shaft 33 Because of this, it does not move to the right.

In this state, the latch 23' cannot be rotated clockwise and the hinge pin 23' cannot be detached from the latch 26'. Further, at this time, there is no need to separately provide a device such as a safety lever that receives rotational force or the like.

Furthermore, since the lower part of the cabinet 21 and the lower surface of the door 24 are provided with the same mechanism as the upper part, the same functions as those described above are performed.

Next, when closing the door, the upper part of the cabinet 21 and the upper surface of the door 24 will be described in the same way as when opening the door.

When the handle 36 is pushed to close the door 24, the hinge pin 23 eventually comes into contact with the latch 26, and the latch 26 is rotated clockwise about the support shaft 27 while resisting the biasing force of the toggle spring 29. At this time, the lock pin 31 slides on the outer surface of the operating passage 34a and rotates the connecting rod 32 counterclockwise.
Rotate around the central support shaft 33. As the hinge pin 31 is further closed, the operating passage 34a and the locking passage 34b
When the fan approaches the confluence point, the operation of the connecting rod 32 is terminated and the state shown in FIG. 1 is restored, and the fan is completely closed.

Moreover, the same effect is performed at the lower part of the cabinet 21 and the lower surface of the door.

Next, the operation occurs when the handle 36' is pulled to open the door on the opposite side, but this is only because the rotation of the latch, connecting rod, etc. and the direction of force are reversed from when the handle 36 is pulled. It is clear from the drawing that the action is exactly the same, so the explanation will be omitted.

Also, when the handles 36 and 38' are pulled simultaneously, the ten lock pins 31 try to rotate the connecting rod 32 in the clockwise υ direction, but the lock pin 31' tries to rotate the connecting rod 32 in the counterclockwise direction. The latches 26 and 26' cannot be rotated, so the door cannot be opened in either direction, and a gap may be created between the door and the cabinet 21. do not have.

As described above, in the present invention, both handles are 36°36°
′ is pulled at the same time, the lock pin 31°31
' is an extremely small movement distance and the connecting rods 32 are pressed together, so the hinge pins 23 and 23' can hardly move, so there is no gap between the door 4 and the cabinet 21, which prevents cold air from leaking and improves performance. It also does not reduce the

In addition, when the door is open, the lock pin on the opposite side contacts the inner surface of the lock passage and cannot be moved, so there is no need to provide a separate safety lever or the like to prevent the opposite side from opening.
It also has the advantage of reducing the number of parts, reducing installation space, and reducing costs.

Effects of the Invention As described above, the present invention is attached to a door opening/closing structure having a cabinet having an extraction opening and a door that selectively closes the opening, and the door is configured to be openable and closing from either the left or right side. In the double door device, a pair of hinge pins are attached to both ends of the upper part of the cabinet and protrude downward from the front of the cabinet; a pair of latches are provided at both ends of the upper face of the door to hold the hinge pins and reciprocate the hinge pins in a detachable manner; The connecting rod includes a lock pin projecting from the latch, and a connecting rod that is positioned between the pair of latches so that both ends cover the pair of launches, and is rotatable about a support shaft. At each end of the rod, the hinge pin is attached to the connecting rod while sliding the locking pin in response to the movement of the latch accompanying the opening/closing movement from either the left or right side of the door, which causes the hinge pin to disengage from the latch. an operating passage formed to rotate; and a lock passage formed to enter around the lock pin and prevent movement of the lock pin in response to rotation of the connecting rod when the opposite door is opened. In addition, by providing the same mechanism as above at the bottom of the door opening/closing structure, when both handles are pulled at the same time, both lock pins push the connecting rods against each other with a minimal movement distance. The hinge pin can hardly move, so there is no gap between the door and the cabinet, so there is no chance of cold air leaking out and reducing performance.

In addition, when the door is open, the lock pin on the opposite side contacts the inner surface of the lock passage and cannot be moved, so there is no need to provide a separate safety lever or the like to prevent the opposite side from opening.
The number of parts is small, which reduces installation space, reduces costs, and reduces weight.

[Brief explanation of drawings]

Figure 1 is a top view of a refrigerator equipped with a double door device according to an embodiment of the present invention when the door is closed, Figure 2 is a top view when the door is open, and Figure 3 is a conventional double door. FIG. 4 is a top view of the refrigerator equipped with the device when the door is closed, FIG. 4 is a top view when the door is half-open, and FIG. 6 is a top view when the door is open. 23.23'... Hinge pin, 26.26'.
...Latch, 31.31'...Lock pin, 33...Center support shaft, 32...Connection rod, 34a, 34a'...・Operating passage, 34b,
3. *b'...Lock passage.

Claims (1)

[Claims] A device for a double door, which is attached to a door opening/closing structure having a cabinet having an extraction opening and a door that selectively closes the opening, and configured so that the door can be opened and closed from either the left or right side, A pair of hinge pins attached to both ends and protruding downward from the front of the cabinet; a pair of latches provided at both ends of the upper surface of the door for holding the hinge pin and reciprocating the hinge pin in a detachable manner; and a lock protruding from the latch. located between the pin and the pair of latches so that both ends cover the pair of latches,
and a connecting rod that is rotatable around a central support shaft,
At each end of the connecting rod, the hinge pin is attached to the connecting rod while sliding the locking pin in response to the movement of the latch accompanying the opening/closing movement from either the left or right side of the door, which causes the hinge pin to disengage from the latch. an operating passage formed to rotate the rod; and a lock passage formed so as to enter around the lock pin and prevent movement of the lock pin in response to rotation of the connecting rod when the door on the opposite side is opened. and a double door device which is also provided with the same mechanism as described above at the lower part of the door opening/closing structure.